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OASIS · CMS Q&As

M1340: CMS OASIS Q&As

49 questions CMS has answered, quoted whole from the CMS OASIS Q&As.

CMS OASIS Q&As · March 2026

M1340 on the OASIS item lookup

M1340 Q102Category 4b - OASIS Data Items

M1340 - M1342. Is a gastrostomy that is being allowed to close on its own considered a surgical wound?

A gastrostomy that is being allowed to close would be excluded from consideration as a surgical wound, because it is an ostomy.

[Q&A EDITED 10/18; EDITED 09/09]

M1340 Q102.1Category 4b - OASIS Data Items

M1340. Is a peritoneal dialysis catheter considered a surgical wound? Isn't the opening in the abdominal wall a type of ostomy?

The site of a peritoneal dialysis catheter is considered a surgical wound. The opening in the abdominal wall is referred to as the exit site and is not an ostomy.

[Q&A EDITED 10/18; ADDED 08/07; M number updated 09/09; Previously CMS OCCB Q&A 07/06 Q22]

M1340 Q103Category 4b - OASIS Data Items

M1340. If the patient had a port-a-cath, but the agency was not providing any services related to the cath and not accessing it, would this be scored as a surgical wound?

Yes.

[Q&A EDITED 09/09]

M1340 Q104Category 4b - OASIS Data Items

M1340. Are implanted infusion devices or venous access devices considered surgical wounds? Does it matter whether or not the device is accessed routinely?

Yes, the surgical sites where such devices were implanted would be considered surgical wounds. It does not matter whether the device is accessed at a particular frequency or not.

[Q&A EDITED 09/09]

M1340 Q104.1Category 4b - OASIS Data Items

M1340. Is the Vantas implanted device considered a surgical wound?

The VANTAS® Implant is inserted just under the skin in the upper arm and provides a continuous 12-month administration of histrelin acetate for the palliative treatment of advanced prostate cancer. Once the surgical incision that was created to implant the device is made and until the implant device is removed, it is considered a surgical wound for M1340.

[Q&A ADDED 06/14; Previously CMS Qtrly Q&A 07/13 Q12]

M1340 Q105.1Category 4b - OASIS Data Items

M1340. If a patient has a venous access device that no longer provides venous access, (e.g. no bruit, no thrill, unable to be utilized for dialysis), is it considered a venous access device that would be “counted” as a surgical wound for M1340, Surgical Wound and the subsequent surgical wound question?

Yes, as long as the venous access device is in place, it is considered to be a surgical wound whether or not it is functional or currently being accessed.

[Q&A ADDED 08/07; Previously CMS OCCB Q&A 07/06 Q26]

M1340 Q105.1.1Category 4b - OASIS Data Items

M1340. Is an arteriovenous (AV) fistula considered as a current surgical wound? Does it matter if it is still utilized for dialysis?

While the surgical connection of a vein to an artery is not a synthetic access/device, an AV fistula is considered a current surgical wound once it is surgically created and as long as it is present in the patient's body. This is true even if the fistula never matures, and/or is not currently used for vascular access. In addition to AV fistulas, the sites of implanted venous access devices or other implanted infusion devices such as medication pumps, catheters for peritoneal dialysis, AV shunts or AV grafts should all be considered surgical wounds for as long as they are present, whether functional or not.

[Q&A ADDED 06/14; Previously CMS Qtrly Q&A 07/13 Q11]

M1340 Q105.2Category 4b - OASIS Data Items

M1340. Does the presence of sutures equate to a surgical wound? For example, IV access that is sutured in place, a pressure ulcer that is sutured closed or the sutured incision around a fresh bowel ostomy.

No, the presence of sutures does not automatically equate to a surgical wound. In the examples given, a peripheral IV, even if sutured in place, is not a surgical wound. A pressure ulcer does not become a surgical wound by being sutured closed, and the bowel ostomy would be excluded from M1340 - Does this patient have a Surgical Wound.

[Q&A EDITED 10/18; EDITED 01/10; ADDED 08/07; Previously CMS OCCB Q&A 07/06 Q27]

M1340 Q105.3Category 4b - OASIS Data Items

M1340. Since an implanted venous access device is considered a surgical wound for M1340, when it is initially implanted, is the surgical incision through which it was implanted a second surgical wound (separate from the venous access device)?

An implanted venous access device is considered a current surgical wound as long as it is implanted in the patient's body. When first implanted, the incision is the surgical wound. The assessing clinician will follow the guidance in Ch. 3 of the current OASIS Guidance Manual and the CMS OASIS Q&As to determine the healing status of the incision. Once it is fully epithelialized, the site due to the implanted device will remain a current surgical wound with a status of "Newly epithelialized" for as long as it is present in the patient's body, unless it later develops complications.

[Q&A EDITED 05/22; EDITED 06/14; ADDED 08/07; Previously CMS OCCB Q&A 07/06 Q28 and CMS OCCB Q&A 04/10 Q12]

M1340 Q105.4.1Category 4b - OASIS Data Items

M1340. If, when reading op reports I find that tissue and/or other structures (mesh, necrotic tissue etc.) were excised when the operation procedure only states I&D, is the resulting wound a surgical wound even though the surgery is labeled I&D?

A simple incision and drainage (I&D) or simple debridement are not surgical wounds for OASIS reporting. A surgical procedure that involves excision of necrotic tissue beyond general debridement (such as excision of a necrotic mass), excision of mesh or other appliances or structures goes beyond a simple I&D/debridement and the resulting lesion would be reported as a surgical wound for M1340 until re-epithelialization has been present for approximately 30 days at which time it becomes a scar.

[Q&A EDITED 05/22; ADDED & EDITED 09/09; M number updated 09/09; Previously CMS OCCB Q&A 10/07 Q18]

M1340 Q105.4.1.1Category 4b - OASIS Data Items

M1340. My patient has a diagnosed diabetic foot ulcer. Recently she had an I&D of the foot with a bone biopsy (needle or other technique) to rule out osteomyelitis. Would the ulcer be classified as a surgical wound after the biopsy?

The wound in the example you cite would continue to be considered a diabetic foot ulcer, and not reported as a surgical wound.

[Q&A ADDED 10/16; Previously CMS Qtrly Q&A 07/15 Q3]

M1340 Q105.4.2Category 4b - OASIS Data Items

M1340. If a patient had an intra-abdominal abscess that was drained percutaneously and then a JP drain was inserted via interventional radiology is this considered a surgical wound?

Yes. Even though the opening was created percutaneously, it is considered a surgical wound because a drain was inserted.

[Q&A ADDED 06/14; Previously CMS Qtrly Q&A 01/14 Q8]

M1340 Q105.5Category 4b - OASIS Data Items

M1340. I understand that a simple I&D of an abscess is not a surgical wound. Does it make a difference if a drain is inserted after the I&D? Is it a surgical wound if the abscess is removed?

For purposes of scoring the OASIS integumentary items, a typical incision and drainage procedure does not result in a surgical wound. The procedure would be reported as a surgical wound if a drain was placed following the procedure. Also, if the abscess was surgically excised, the abscess no longer exists and the patient would have a surgical wound. It is considered a surgical wound until re-epithelialization has been present for approximately 30 days at which time it becomes a scar.

[Q&A EDITED 09/09; ADDED 08/07; Previously CMS OCCB Q&A 05/07 Q17]

M1340 Q105.5.1Category 4b - OASIS Data Items

M1340. An I&D is not considered a surgery - but a drain inserted during this procedure makes the wound a surgical wound. Dilemma: This makes the OASIS answer for surgical wound a yes but we cannot code aftercare because we don't code the I&D as a surgery - but we do have surgical wound care. This is quite confusing.

The OASIS item response will not always mirror diagnoses and ICD-10 codes found in M1021/M1023 - Primary Diagnosis/Other Diagnoses. Continue to score the OASIS following current CMS guidance and follow ICD-10-CM coding guidance for code selection for M1021 and M1023.

[Q&A EDITED 10/23; EDITED 05/22; EDITED 10/18; ADDED 09/09; M numbers updated 09/09; Previously CMS OCCB Q&A 07/08 Q8]

M1340 Q105.6Category 4b - OASIS Data Items

M1340. A patient, who has a paracentesis, has a stab wound to access the abdominal fluid. Is this a surgical wound?

When a surgical procedure creates a wound in which a drain is placed (e.g., an incision or stab wound), the presence of the drain (or drain wound site until re-epithelialization has been present for approximately 30 days at which time it becomes a scar) should be reported as a surgical wound. If a needle was inserted to aspirate abdominal fluid and then removed (no drain left in place), it should not be reported as a surgical wound.

[Q&A EDITED 09/09; ADDED 08/07; Previously CMS OCCB Q&A 05/07 Q18]

M1340 Q105.8Category 4b - OASIS Data Items

M1340. Does a patient have a surgical wound if they have a traumatic laceration and it requires plastic surgery to repair the laceration?

Simply suturing a traumatic laceration does not create a surgical wound. A traumatic wound that required surgery to repair the injury would be considered a surgical wound (e.g., repair of a torn tendon, repair of a ruptured abdominal organ, or repair of other internal damage), and the correct response to M1340 - Surgical Wound for this type of wound would be 1 - Yes, this patient has at least one observable surgical wound or 2 - Surgical wound known but not observable due to non-removable dressing/device depending on whether or not it was observable.

[Q&A EDITED 05/22; EDITED 09/09; ADDED 08/07; Previously CMS OCCB Q&A 05/07 Q20]

M1340 Q105.9Category 4b - OASIS Data Items

M1340. Is a PICC placed by a physician under fluoroscopy and sutured in place considered a surgical wound? It would seem that placement by this procedure is similar to other central lines and would be considered a surgical wound.

Even though the physician utilized fluoroscopy to insert the peripherally inserted central catheter (PICC) and sutured it in place, it is not a surgical wound, as PICC lines are excluded as surgical wounds for OASIS data collection purposes.

[Q&A ADDED 08/07; Previously CMS OCCB Q&A 05/07 Q21]

M1340 Q105.9.1Category 4b - OASIS Data Items

M1340. A patient had a “PICC” catheter inserted centrally into the internal jugular. Is this considered a central line when scoring M1340 - Surgical Wounds?

Central venous catheters or central lines are those with the catheter tip located in the superior vena cava. Central lines can be peripherally inserted (i.e., basilic or cephalic vein in upper arm, or femoral vein in the groin) or centrally inserted (i.e., internal jugular vein in the neck, or subclavian or axillary vein in the chest). Central lines that are centrally inserted (as in the internal jugular example) ARE considered surgical wounds for M1340 because of the central insertion, even if the type of catheter inserted into the central vein was intended to be inserted peripherally. Central lines that are peripherally inserted are not considered surgical wounds.

[Q&A ADDED 06/14; Previously CMS Qtrly Q&A 01/14 Q7]

M1340 Q105.11Category 4b - OASIS Data Items

M1340. Is a heart cath site (femoral) considered a surgical wound? If not, what if a stent is placed?

If a cardiac catheterization was performed via a puncture with a needle into the femoral artery, the catheter insertion site is not reported as a surgical wound for M1340. The fact that a stent was placed does not have an impact.

[Q&A ADDED 08/07; M number updated 09/09; Previously CMS OCCB Q&A 07/07 Q9]

M1340 Q105.11.1Category 4b - OASIS Data Items

M1340. I know existing guidance states that a femoral stick site created to perform cardiac catheterization is not a surgical wound. Does the same apply for the femoral sheath site created with a cut down procedure to perform endovascular AAA repair? What if a cut down procedure is needed to create a larger “wound” than a typical femoral sheath stick….would this change its status?

If an incision or "cut down" was completed in order to perform a procedure per femoral sheath, this incision would be considered a surgical wound. A femoral puncture site created without "cut down" is not a surgical wound on M1340.

[Q&A ADDED 01/11; Previously CMS OCCB Q&A 10/10 Q7]

M1340 Q105.12Category 4b - OASIS Data Items

M1340. If a drain was placed post-op and removed prior to admission to home health is the drain site considered a surgical wound upon admission to home care?

A wound with a drain is reported as a surgical wound at M1340. It remains a surgical wound after the drain is pulled until re-epithelialization has been present for approximately 30 days at which time it becomes a scar.

[Q&A ADDED & EDITED 09/09; Previously CMS OCCB Q&A 10/07 Q17]

M1340 Q105.13Category 4b - OASIS Data Items

M1340. A patient had a skin cancer lesion removed in a doctor's office with a few sutures to close the wound. Is this considered a surgical wound?

A shave, punch or excisional biopsy, utilized to remove and/or diagnose skin lesions, does result in a surgical wound. It is considered a surgical wound until re-epithelialization has been present for approximately 30 days at which time it becomes a scar.

[Q&A ADDED & EDITED 09/09; Previously CMS OCCB Q&A 10/07 Q19]

M1340 Q105.13.01Category 4b - OASIS Data Items

M1340. Our patient had skin cancer treated with electrodessication and curettage, creating a lesion. Is this considered a surgical wound when completing M1340, Surgical Wounds?

Yes.

[Q&A ADDED 06/14; Previously CMS Qtrly Q&A 01/14 Q6]

M1340 Q105.13.02Category 4b - OASIS Data Items

M1340. The Q&As address wounds caused by electrodessication and curettage as being surgical wounds. Would lesions resulting from freezing with liquid nitrogen be considered surgical wounds for M1340?

A lesion resultant from cryosurgery is not considered a surgical wound when scoring M1340 - Surgical Wound.

[Q&A EDITED 05/22; EDITED 10/18; ADDED 10/16; Previously CMS Qtrly Q&A 07/15 Q6]

M1340 Q105.13.1Category 4b - OASIS Data Items

M1340. Is the removal of a callus considered to be a surgical wound?

A callus that was removed is NOT considered a surgical wound when scoring M1340 – Surgical Wound.

[Q&A EDITED 05/22; EDITED 10/18; ADDED 01/11; Previously CMS OCCB Q&A 10/10 Q8]

M1340 Q105.14Category 4b - OASIS Data Items

M1340. Are arthrocentesis sites considered surgical wounds?

When a surgical procedure creates a wound in which a drain is placed (e.g., an incision or stab wound), the presence of the drain (or drain wound site until re-epithelialization has been present for approximately 30 days at which time it becomes a scar) should be reported as a surgical wound. If a needle was inserted to aspirate fluid and then removed, (no drain left in place), it should not be reported as a surgical wound. If a physician performs a surgical procedure via arthroscopy, the arthrocentesis site would be considered a surgical wound until re-epithelialization has been present for approximately 30 days at which time it becomes a scar.

[Q&A EDITED 06/14; ADDED 09/09; Previously CMS OCCB Q&A 04/08 Q10]

M1340 Q105.14.1Category 4b - OASIS Data Items

M1340. Is a wound from an abdominal laparoscopy surgery considered a surgical wound? No drain was placed after the procedure.

Per existing guidance, for M1340 - Surgical Wound, an incision created for the purpose of laparoscopic surgery, arthroscopy, and other minimally invasive surgery/procedure would be considered a surgical wound. It remains a current surgical wound until the site is completely epithelialized and is without signs/symptoms of infection for approximately 30 days, at which time it becomes a scar.

[Q&A EDITED 05/22; ADDED 10/16; Previously CMS Qtrly Q&A 07/15 Q5]

M1340 Q105.15Category 4b - OASIS Data Items

M1340. Is an implanted mechanical left ventricle device (LVAD) that has an air vent exiting through lower right abdomen a surgical wound?

The Left Ventricular Assist Device’s (LVAD/HeartMate) cannula exit site would be considered a surgical wound until the LVAD is discontinued and the wound is re-epithelialized for approximately 30 days at which time it becomes a scar.

[Q&A ADDED & EDITED 09/09; Previously CMS OCCB Q&A 07/08 Q7]

M1340 Q105.16Category 4b - OASIS Data Items

M1340. Is a chest tube site a surgical wound?

A chest tube site is a thoracostomy. Ostomies are excluded as surgical wounds in the OASIS. A chest tube site is not a surgical wound even if a chest tube or drain is present.

[Q&A EDITED 10/18; ADDED & EDITED 09/09; Previously CMS OCCB Q&A 07/08 Q10]

M1340 Q105.16.1Category 4b - OASIS Data Items

M1340. A surgical incision was created to perform exploratory surgery. When closing the wound, the surgeon inserted a chest tube utilizing the opening created for the surgery. Can this closed incision with a chest tube be counted as a surgical wound when completing M1340?

The wound described should be considered a thoracostomy and is not considered a surgical wound when completing M1340 – Surgical Wound.

[Q&A EDITED 05/22; ADDED 01/11; Previously CMS OCCB Q&A 10/10 Q9]

M1340 Q105.17Category 4b - OASIS Data Items

M1340. Would an enterocutaneous fistula that developed as a result of a surgery be documented as a surgical wound?

A fistula is a complication of surgery but it is not a surgical wound. Though fistulas are sometimes located within surgical wounds, answering M1340 - Surgical Wound & M1342 Status of Most problematic Surgical Wound that is Observable would be based on the condition of the surgical wound, not the fistula, using the healing status guidance outlined in the OASIS Guidance Manual. For example, if the only opening in a 3-month-old closed surgical wound healed by primary intention was an enterocutaneous fistula then the answer to M1340 - Surgical Wound would be “0-No”.

[Q&A EDITED 05/22; ADDED 09/09; M number updated 09/09; Previously CMS OCCB Q&A 10/08 Q5]

M1340 Q105.18Category 4b - OASIS Data Items

M1340. Our patient has a complicated wound involving a mid-line abdominal incision and 6 buttons holding retention sutures running under the skin. Would each button be considered a surgical wound for OASIS data collection?

No, a retention suture that utilizes a button to prevent damage to the skin is not considered a surgical wound.

[Q&A ADDED 09/09; Previously CMS OCCB Q&A 07/09 Q8]

M1340 Q105.19Category 4b - OASIS Data Items

M1340. Is a Q ball used for pain management following a joint replacement considered a surgical wound if the Q ball remains in place? Is it considered a surgical wound after removal if the site is still observable?

The ON-Q pump was developed to continuously infuse local anesthetic through 2 small catheters inserted at the wound site. If the catheters are inserted into the surgical incision, they are not considered separate surgical wounds. If the surgeon implanted the catheters at locations other than the surgical incision, the insertion sites would be considered separate surgical wounds, as the ON-Q pump catheters are implanted infusion devices. After discontinuation of the infusion, the insertion sites would be considered current surgical wounds until re-epithelialization has been present for approximately 30 days at which time it becomes a scar.

[Q&A ADDED & EDITED 09/09; Previously CMS OCCB Q&A 07/09 Q9]

M1340 Q105.20Category 4b - OASIS Data Items

M1340. Is a VP shunt for hydrocephalus a current surgical wound, no matter how old it is?

The incision created to implant the VP shunt is a surgical wound until reepithelialization has been present for approximately 30 days at which time it becomes a scar. At this point it is no longer considered a current surgical wound, as the VP shunt is neither venous access device nor an infusion device.

[Q&A ADDED & EDITED 09/09; Previously CMS OCCB Q&A 07/09 Q10]

M1340 Q105.21Category 4b - OASIS Data Items

M1340. Are toenail removals by a MD considered a surgical wound with or without sutures?

Removal or excision of a toenail is not considered a surgical wound. If a surgical procedure was performed that goes beyond simple excision, it would be considered a surgical wound.

[Q&A ADDED 01/12; Previously CMS OCCB Q&A 07/11 Q8]

M1340 Q105.22Category 4b - OASIS Data Items

M1340. Are insulin and morphine pumps captured in M1340, Surgical Wounds?

If the infusion device is implanted, it would also qualify as a surgical wound under M1340. An external device infusing medication via a SQ needle is not counted as a surgical wound.

[Q&A EDITED 04/15; ADDED 01/12; Previously CMS OCCB Q&A 07/11 Q9]

M1340 Q105.23Category 4b - OASIS Data Items

M1340. Are burr holes on the head following an evacuation of a subdural hematoma which still have tightly adhered scabs considered a surgical wound for M1340?

For the purposes of the OASIS Integumentary Status items, a burr hole is a hole that is surgically placed in the skull, or cranium and is considered a surgical wound. It remains a current surgical wound until the site is completely epithelialized and is without signs/symptoms of infection for approximately 30 days, at which time it becomes a scar.

[Q&A ADDED 10/16; Previously CMS Qtrly Q&A 07/15 Q4]

M1340 Q106Category 4b - OASIS Data Items

M1340. Is a peritoneal dialysis catheter considered a surgical wound?

A peritoneal dialysis catheter (or an AV shunt) is considered a surgical wound in OASIS, as long as it is present in the patient’s body. This is also true for central lines and implanted vascular access devices.

[Q&A EDITED 10/23; EDITED 05/22; EDITED 01/11]

M1340 Q106.1Category 4b - OASIS Data Items

M1340 Our patient has a “Mammosite”, a device implanted in her lumpectomy site. She receives radiation bead insertion through this catheter. It requires a sterile dressing change daily. Is this device a surgical wound for M1340 and M1342?

Based on the details provided in the question, the incision created to insert the balloon catheter is considered a surgical wound in OASIS. Utilize existing CMS guidance to determine the healing status.

[Q&A EDITED 05/22; ADDED 12/12; Previously CMS Qtrly Q&A 07/12 Q3]

M1340 Q106.2Category 4b - OASIS Data Items

M1340. Is the site resulting from a kyphoplasty procedure counted as a surgical wound when answering M1340 – Surgical Wounds?

If the kyphoplasty procedure was performed percutaneously and resulted in a pinpoint needle puncture site where the bone cement was injected, it would not be considered a surgical wound. If the kyphoplasty procedure involved an open approach, requiring a surgical incision, the resulting wound would be considered a surgical wound for M1340.

[Q&A EDITED 05/22; ADDED 12/12; Previously CMS Qtrly Q&A 07/12 Q4]

M1340 Q106.3Category 4b - OASIS Data Items

M1340. Is a Pleurx catheter considered a surgical wound? Is there a difference if the Pleurx catheter was in the abdomen vs chest cavity?

The presence of a specific catheter type does not define a surgical wound. A Pleurx catheter inserted as a chest tube is considered a thoracostomy and would not be considered a surgical wound. All ostomies (including those with drains) are excluded as surgical wounds. A surgical procedure that creates a wound that is not an “ostomy”, and that has a drain (for example a Pleurx catheter, a Jackson-Pratt, etc.) would be considered a surgical wound.

[Q&A ADDED 05/22; Previously CMS Qtrly Q&A 07/18 Q7]

M1340 Q106.4Category 4b - OASIS Data Items

M1340. We are looking for some guidance on a diabetic ulcer that was covered with a skin graft and how to code it at SOC? Is it a diabetic ulcer or does it become a surgical wound, like pressure ulcers?

For OASIS coding purposes, when any type of ulcer is treated surgically with any kind of graft or flap, it is considered a surgical wound for M1340 - Does this patient have a Surgical Wound until approximately 30 days after complete re-epithelialization.

[Q&A ADDED 05/22; Previously CMS Qtrly Q&A 01/19 Q5]

M1340 Q106.4.1Category 4b - OASIS Data Items

M1340. Are burn wounds that have been surgically grafted considered a surgical wound even if the graft fails?

For OASIS coding purposes, when any type of ulcer or burn is surgically treated with any kind of graft or flap, it is considered a surgical wound for M1340 - Does this patient have a Surgical Wound until approximately 30 days after complete re-epithelialization.

[Q&A EDITED 02/26; ADDED 05/22; Previously CMS Qtrly Q&A 07/19 Q8]

M1340 Q106.5Category 4b - OASIS Data Items

M1340. If a patient has a fasciotomy to treat compartment syndrome is the fasciotomy incision considered a surgical wound when answering M1340 - Does this patient have a Surgical Wound?

M1340 - Does this patient have a Surgical Wound identifies the presence of a wound resulting from a surgical procedure. The fasciotomy incision would be considered a surgical wound.

[Q&A ADDED 05/22; Previously CMS Qtrly Q&A 07/19 Q9]

M1340 Q106.6Category 4b - OASIS Data Items

M1340. Would a pacemaker or an implantable loop recording device be considered a surgical wound once the initial insertion site has been fully epithelialized for at least 30 days?

The incisions created to implant a pacemaker or loop recording device are surgical wounds until re-epithelialization has been present for approximately 30 days at which time, they become scars. At that point they would no longer be considered current surgical wounds, as neither the pacemaker nor the loop recording device, are a venous access device nor an infusion device.

[Q&A ADDED 05/22; Previously CMS Qtrly Q&A 10/21 Q5]

M1340 Q108.1Category 4b - OASIS Data Items

M1340 & M1342. Guidance states that a surgical wound becomes "healed" or no longer reportable as a surgical wound on M1340 once re-epithelialization has been present for approximately 30 days. Determining a specific timeframe in regards to complete epithelialization presents some issues. For instance, if we get a post-surgery patient who has been in the nursing home and then to home health, we may not know when complete epithelialization occurs. Please provide further clarification.

If, at the SOC or other assessment time points, the clinician assesses the wound to be completely epithelialized (including no sign of infection or separation), and the date of complete epithelialization is unknown, the clinician will have to make a determination regarding the wound status based on the history of the date of surgery, any reported wound healing progress/complications and clinical assessment findings. Since for the purposes of the OASIS, a surgical wound is considered healed and no longer counted as a current surgical wound once re-epithelialization has been present for approximately 30 days (assuming no sign of infection or separation), then if based on the surgery date, it is clear that the completely epithelialized wound could not possibly have been fully epithelialized for at least 30 days, Response 0-Newly epithelialized should be reported. If the wound appears completely epithelialized (no sign of infection or separation) and the date of epithelialization is unknown, but based on the known wound history and date of surgery it is possible that the wound could have been fully epithelialized for at least 30 days, then the wound status is deemed “healed” and no longer reportable as a surgical wound.

[Q&A EDITED 10/18; EDITED 01/12; ADDED 09/09; Previously CMS OCCB Q&A 10/08 Q6]

M1340 Q109Category 4b - OASIS Data Items

M1340 & M1342. Is a mediport "not observable" because it is under the skin?

Please refer to the definition of “not observable” used in the OASIS surgical wound items in the current OASIS Guidance Manual – “not observable” is an appropriate response ONLY when a non-removable dressing is present. This is not the case with a mediport. As long as the mediport is present, whether it is being accessed or not, the patient is considered as having a current surgical wound.

[Q&A EDITED 06/14]

M1340 Q109.1Category 4b - OASIS Data Items

M1340 & M1342. How would M1340 – Surgical Wound and M1342 – Status of Most Problematic Surgical Wound be answered, if the clinician determines that the steri-strips completely obscure the incision preventing visual assessment of the wound? Would the clinician need to obtain an order from the physician stating the steri-strips are a “nonremovable dressing“ for the wound to be considered not observable in M1340?

M1340 & M1342. Steri-strips are skin closures (similar in intent to sutures or staples) and not a dressing or device. Steri-strips will remain in place until they fall off unless there is a specific clinical reason and/or direction from the physician/allowed practitioner to remove them sooner. While they are in place, if the placement of the steri-strips allows sufficient visualization of the wound, the assessing clinician can determine and report on M1342 – Status of Most Problematic Surgical Wound that is Observable the appropriate healing status response, based on the healing status guidance outlined in the OASIS Guidance Manual. If the steri-strips completely obscure the incision, or obscure the incision to the point that the assessing clinician is unable to visualize the incision well-enough to determine the healing status, then M1340 Surgical Wound should be reported as Response 2 - Surgical wound known but not observable due to non-removable dressing/device, and M1342 would be skipped. Note that while steristrips are clinically different than a dressing or a device, the limitations of the OASIS data responses make this the best response in the situation described.

[Q&A EDITED 05/22; ADDED 04/15; Previously CMS Qtrly Q&A 04/15 Q3]

M1340 Q112.6.12Category 4b - OASIS Data Items

M1340 & M1342. If a surgical wound dehisces at opposite ends, with an area of intact/healed skin between, is this still addressed in OASIS as one surgical incision? Secondarily, if still considered a single surgical wound - if one of the dehisced areas is granulating, and the other covered in slough - would the overall percentage of wound bed be considered when determining healing status, rather than applying percentages to two separate wounds?

When a portion of the surgical wound is intact/healed, and a portion of the wound is open and healing by secondary intention, to determine the healing status consider the portion of the wound bed that is healing by secondary intention when applying the healing status coding criteria of “% of the wound bed covered with granulation tissue” or “% of wound bed covered with avascular tissue”. If the surgical wound has more than one area healing by secondary intention, separated by one or more areas of intact/healed tissue, all open areas healing by secondary intention would be included as the "wound bed”, when applying the percentages to determine healing status.

[Q&A EDITED 05/22; Q&A ADDED 10/16; Previously CMS Qtrly Q&A 04/16 Q7]

Also mentioned in

Source: CMS OASIS Q&As: Category 4 - OASIS Data Set: Forms and Items (March 2026), text extracted from the PDF with pdftotext, retrieved 2026-10-09. Works of the US Government are in the public domain.

Every CMS OASIS Q&ACategory 4a - General Questions

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