A00–B99Ch. 1low RTP
Certain infectious and parasitic diseases
How these codes group
Most of the 1068 codes here group to K — MMTA - Infectious Disease, Neoplasms, and Blood-Forming Diseases (863 codes). 78 are assigned no group at all.
ICD-10 · Reference
ICD-10-CM Chapter Reference
All 22 ICD-10-CM chapters (FY2026) with chapter labels, RTP risk, and PDGM clinical-group hints — searchable.
ICD-10-CM FY2026 · CMS grouper v07.1.26
Search by chapter range (e.g. J00), label keyword, or PDGM group keyword.
ICD-10-CM FY2026 (CDC/CMS)·FY2026 Tabular List — chapter structureHH PPS Grouper Software (HHGS)·Authoritative ICD-10-CM-to-clinical-group crosswalk·42 CFR §484.220
All 22 chapters
ICD-10-CM FY2026
- C00–D49Ch. 2low RTP
Neoplasms
How these codes group
Most of the 1727 codes here group to K — MMTA - Infectious Disease, Neoplasms, and Blood-Forming Diseases (1463 codes). 227 are assigned no group at all.
- D50–D89Ch. 3low RTP
Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism
How these codes group
Most of the 323 codes here group to K — MMTA - Infectious Disease, Neoplasms, and Blood-Forming Diseases (293 codes). 22 are assigned no group at all.
- E00–E89Ch. 4low RTP
Endocrine, nutritional and metabolic diseases
How these codes group
Most of the 971 codes here group to I — MMTA - Endocrine (424 codes). 169 are assigned no group at all.
- F01–F99Ch. 5low RTP
Mental, Behavioral and Neurodevelopmental disorders
How these codes group
Most of the 871 codes here group to F — Behavioral Health (787 codes). 84 are assigned no group at all.
- G00–G99Ch. 6low RTP
Diseases of the nervous system
How these codes group
Most of the 700 codes here group to B — Neuro Rehabilitation (383 codes). 104 are assigned no group at all.
- H00–H59Ch. 7high RTP
Diseases of the eye and adnexa
How these codes group
Most of the 2677 codes here group to A — MMTA - Other (1955 codes). 722 are assigned no group at all.
- H60–H95Ch. 8high RTP
Diseases of the ear and mastoid process
How these codes group
Most of the 653 codes here group to A — MMTA - Other (459 codes). 194 are assigned no group at all.
- I00–I99Ch. 9low RTP
Diseases of the circulatory system
How these codes group
Most of the 1427 codes here group to H — MMTA - Cardiac and Circulatory (683 codes). 199 are assigned no group at all.
- J00–J99Ch. 10low RTP
Diseases of the respiratory system
How these codes group
Most of the 360 codes here group to L — MMTA - Respiratory (233 codes). 31 are assigned no group at all.
- K00–K95Ch. 11low RTP
Diseases of the digestive system
How these codes group
Most of the 857 codes here group to J — MMTA - Gastrointestinal tract and Genitourinary system (564 codes). 203 are assigned no group at all.
- L00–L99Ch. 12low RTP
Diseases of the skin and subcutaneous tissue
How these codes group
Most of the 1000 codes here group to C — Wound (467 codes). 205 are assigned no group at all.
- M00–M99Ch. 13low RTP
Diseases of the musculoskeletal system and connective tissue
How these codes group
Most of the 6665 codes here group to E — Musculoskeletal Rehabilitation (4247 codes). 2377 are assigned no group at all.
- N00–N99Ch. 14low RTP
Diseases of the genitourinary system
How these codes group
Most of the 836 codes here group to A — MMTA - Other (356 codes). 110 are assigned no group at all.
- O00–O9ACh. 15high RTP
Pregnancy, childbirth and the puerperium
How these codes group
Most of the 2437 codes here group to A — MMTA - Other (947 codes). 1479 are assigned no group at all.
- P00–P96Ch. 16high RTP
Certain conditions originating in the perinatal period
How these codes group
Most of the 463 codes here group to A — MMTA - Other (375 codes). 55 are assigned no group at all.
- Q00–Q99Ch. 17high RTP
Congenital malformations, deformations and chromosomal abnormalities
How these codes group
Most of the 881 codes here group to A — MMTA - Other (622 codes). 206 are assigned no group at all.
- R00–R99Ch. 18high RTP
Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
How these codes group
Most of the 773 codes here group to B — Neuro Rehabilitation (6 codes). 766 are assigned no group at all.
- S00–T88Ch. 19medium RTP
Injury, poisoning and certain other consequences of external causes
How these codes group
Most of the 41142 codes here group to E — Musculoskeletal Rehabilitation (14895 codes). 14845 are assigned no group at all.
- V00–Y99Ch. 20high RTP
External causes of morbidity
How these codes group
None of the 7461 codes here is assigned a clinical group. 7461 are assigned no group at all.
- Z00–Z99Ch. 21medium RTP
Factors influencing health status and contact with health services
How these codes group
Most of the 1411 codes here group to G — MMTA - Surgical Aftercare (20 codes). 1364 are assigned no group at all.
- U00–U85Ch. 22medium RTP
Codes for special purposes
How these codes group
Most of the 3 codes here group to L — MMTA - Respiratory (2 codes). 1 are assigned no group at all.
Every subchapter, by chapter
A chapter is too wide to carry one PDGM answer — chapter 9 holds both heart failure and stroke, which CMS puts in different clinical groups. Each subchapter below has its own page listing every code in the range and the group CMS assigns to it.
Chapter 1 (A00–B99) — Certain infectious and parasitic diseases
- A00-A09Intestinal infectious diseases
- A15-A19Tuberculosis
- A20-A28Certain zoonotic bacterial diseases
- A30-A49Other bacterial diseases
- A50-A64Infections with a predominantly sexual mode of transmission
- A65-A69Other spirochetal diseases
- A70-A74Other diseases caused by chlamydiae
- A75-A79Rickettsioses
- A80-A89Viral and prion infections of the central nervous system
- A90-A99Arthropod-borne viral fevers and viral hemorrhagic fevers
- B00-B09Viral infections characterized by skin and mucous membrane lesions
- B10-B10Other human herpesviruses
- B15-B19Viral hepatitis
- B20-B20Human immunodeficiency virus [HIV] disease
- B25-B34Other viral diseases
- B35-B49Mycoses
- B50-B64Protozoal diseases
- B65-B83Helminthiases
- B85-B89Pediculosis, acariasis and other infestations
- B90-B94Sequelae of infectious and parasitic diseases
- B95-B97Bacterial and viral infectious agents
- B99-B99Other infectious diseases
Chapter 2 (C00–D49) — Neoplasms
- C00-C14Malignant neoplasms
- C15-C26Malignant neoplasms of digestive organs
- C30-C39Malignant neoplasms of respiratory and intrathoracic organs
- C40-C41Malignant neoplasms of bone and articular cartilage
- C43-C44Melanoma and other malignant neoplasms of skin
- C45-C49Malignant neoplasms of mesothelial and soft tissue
- C50-C50Malignant neoplasms of breast
- C51-C58Malignant neoplasms of female genital organs
- C60-C63Malignant neoplasms of male genital organs
- C64-C68Malignant neoplasms of urinary tract
- C69-C72Malignant neoplasms of eye, brain and other parts of central nervous system
- C73-C75Malignant neoplasms of thyroid and other endocrine glands
- C76-C80Malignant neoplasms of ill-defined, other secondary and unspecified sites
- C7A-C7AMalignant neuroendocrine tumors
- C7B-C7BSecondary neuroendocrine tumors
- C81-C96Malignant neoplasms of lymphoid, hematopoietic and related tissue
- D00-D09In situ neoplasms
- D10-D36Benign neoplasms, except benign neuroendocrine tumors
- D37-D48Neoplasms of uncertain behavior, polycythemia vera and myelodysplastic syndromes
- D3A-D3ABenign neuroendocrine tumors
- D49-D49Neoplasms of unspecified behavior
Chapter 3 (D50–D89) — Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism
- D50-D53Nutritional anemias
- D55-D59Hemolytic anemias
- D60-D64Aplastic and other anemias and other bone marrow failure syndromes
- D65-D69Coagulation defects, purpura and other hemorrhagic conditions
- D70-D77Other disorders of blood and blood-forming organs
- D78-D78Intraoperative and postprocedural complications of the spleen
- D80-D89Certain disorders involving the immune mechanism
Chapter 4 (E00–E89) — Endocrine, nutritional and metabolic diseases
- E00-E07Disorders of thyroid gland
- E08-E13Diabetes mellitus
- E15-E16Other disorders of glucose regulation and pancreatic internal secretion
- E20-E35Disorders of other endocrine glands
- E36-E36Intraoperative complications of endocrine system
- E40-E46Malnutrition
- E50-E64Other nutritional deficiencies
- E65-E68Overweight, obesity and other hyperalimentation
- E70-E88Metabolic disorders
- E89-E89Postprocedural endocrine and metabolic complications and disorders, not elsewhere classified
Chapter 5 (F01–F99) — Mental, Behavioral and Neurodevelopmental disorders
- F01-F09Mental disorders due to known physiological conditions
- F10-F19Mental and behavioral disorders due to psychoactive substance use
- F20-F29Schizophrenia, schizotypal, delusional, and other non-mood psychotic disorders
- F30-F39Mood [affective] disorders
- F40-F48Anxiety, dissociative, stress-related, somatoform and other nonpsychotic mental disorders
- F50-F59Behavioral syndromes associated with physiological disturbances and physical factors
- F60-F69Disorders of adult personality and behavior
- F70-F79Intellectual Disabilities
- F80-F89Pervasive and specific developmental disorders
- F90-F98Behavioral and emotional disorders with onset usually occurring in childhood and adolescence
- F99-F99Unspecified mental disorder
Chapter 6 (G00–G99) — Diseases of the nervous system
- G00-G09Inflammatory diseases of the central nervous system
- G10-G14Systemic atrophies primarily affecting the central nervous system
- G20-G26Extrapyramidal and movement disorders
- G30-G32Other degenerative diseases of the nervous system
- G35-G37Demyelinating diseases of the central nervous system
- G40-G47Episodic and paroxysmal disorders
- G50-G59Nerve, nerve root and plexus disorders
- G60-G65Polyneuropathies and other disorders of the peripheral nervous system
- G70-G73Diseases of myoneural junction and muscle
- G80-G83Cerebral palsy and other paralytic syndromes
- G89-G99Other disorders of the nervous system
Chapter 7 (H00–H59) — Diseases of the eye and adnexa
- H00-H05Disorders of eyelid, lacrimal system and orbit
- H10-H11Disorders of conjunctiva
- H15-H22Disorders of sclera, cornea, iris and ciliary body
- H25-H28Disorders of lens
- H30-H36Disorders of choroid and retina
- H40-H42Glaucoma
- H43-H44Disorders of vitreous body and globe
- H46-H47Disorders of optic nerve and visual pathways
- H49-H52Disorders of ocular muscles, binocular movement, accommodation and refraction
- H53-H54Visual disturbances and blindness
- H55-H57Other disorders of eye and adnexa
- H59-H59Intraoperative and postprocedural complications and disorders of eye and adnexa, not elsewhere classified
Chapter 8 (H60–H95) — Diseases of the ear and mastoid process
Chapter 9 (I00–I99) — Diseases of the circulatory system
- I00-I02Acute rheumatic fever
- I05-I09Chronic rheumatic heart diseases
- I10-I1AHypertensive diseases
- I20-I25Ischemic heart diseases
- I26-I28Pulmonary heart disease and diseases of pulmonary circulation
- I30-I5AOther forms of heart disease
- I60-I69Cerebrovascular diseases
- I70-I79Diseases of arteries, arterioles and capillaries
- I80-I89Diseases of veins, lymphatic vessels and lymph nodes, not elsewhere classified
- I95-I99Other and unspecified disorders of the circulatory system
Chapter 10 (J00–J99) — Diseases of the respiratory system
- J00-J06Acute upper respiratory infections
- J09-J18Influenza and pneumonia
- J20-J22Other acute lower respiratory infections
- J30-J39Other diseases of upper respiratory tract
- J40-J4AChronic lower respiratory diseases
- J60-J70Lung diseases due to external agents
- J80-J84Other respiratory diseases principally affecting the interstitium
- J85-J86Suppurative and necrotic conditions of the lower respiratory tract
- J90-J94Other diseases of the pleura
- J95-J95Intraoperative and postprocedural complications and disorders of respiratory system, not elsewhere classified
- J96-J99Other diseases of the respiratory system
Chapter 11 (K00–K95) — Diseases of the digestive system
- K00-K14Diseases of oral cavity and salivary glands
- K20-K31Diseases of esophagus, stomach and duodenum
- K35-K38Diseases of appendix
- K40-K46Hernia
- K50-K52Noninfective enteritis and colitis
- K55-K64Other diseases of intestines
- K65-K68Diseases of peritoneum and retroperitoneum
- K70-K77Diseases of liver
- K80-K87Disorders of gallbladder, biliary tract and pancreas
- K90-K95Other diseases of the digestive system
Chapter 12 (L00–L99) — Diseases of the skin and subcutaneous tissue
- L00-L08Infections of the skin and subcutaneous tissue
- L10-L14Bullous disorders
- L20-L30Dermatitis and eczema
- L40-L45Papulosquamous disorders
- L49-L54Urticaria and erythema
- L55-L59Radiation-related disorders of the skin and subcutaneous tissue
- L60-L75Disorders of skin appendages
- L76-L76Intraoperative and postprocedural complications of skin and subcutaneous tissue
- L80-L99Other disorders of the skin and subcutaneous tissue
Chapter 13 (M00–M99) — Diseases of the musculoskeletal system and connective tissue
- M00-M02Arthropathies
- M04-M04Autoinflammatory syndromes
- M05-M14Inflammatory polyarthropathies
- M15-M19Osteoarthritis
- M20-M25Other joint disorders
- M26-M27Dentofacial anomalies [including malocclusion] and other disorders of jaw
- M30-M36Systemic connective tissue disorders
- M40-M43Dorsopathies
- M45-M49Spondylopathies
- M50-M54Other dorsopathies
- M60-M63Soft tissue disorders
- M65-M67Disorders of synovium and tendon
- M70-M79Other soft tissue disorders
- M80-M85Osteopathies and chondropathies
- M86-M90Other osteopathies
- M91-M94Chondropathies
- M95-M95Other disorders of the musculoskeletal system and connective tissue
- M96-M96Intraoperative and postprocedural complications and disorders of musculoskeletal system, not elsewhere classified
- M97-M97Periprosthetic fracture around internal prosthetic joint
- M99-M99Biomechanical lesions, not elsewhere classified
Chapter 14 (N00–N99) — Diseases of the genitourinary system
- N00-N08Glomerular diseases
- N10-N16Renal tubulo-interstitial diseases
- N17-N19Acute kidney failure and chronic kidney disease
- N20-N23Urolithiasis
- N25-N29Other disorders of kidney and ureter
- N30-N39Other diseases of the urinary system
- N40-N53Diseases of male genital organs
- N60-N65Disorders of breast
- N70-N77Inflammatory diseases of female pelvic organs
- N80-N98Noninflammatory disorders of female genital tract
- N99-N99Intraoperative and postprocedural complications and disorders of genitourinary system, not elsewhere classified
Chapter 15 (O00–O9A) — Pregnancy, childbirth and the puerperium
- O00-O08Pregnancy with abortive outcome
- O09-O09Supervision of high risk pregnancy
- O10-O16Edema, proteinuria and hypertensive disorders in pregnancy, childbirth and the puerperium
- O20-O29Other maternal disorders predominantly related to pregnancy
- O30-O48Maternal care related to the fetus and amniotic cavity and possible delivery problems
- O60-O77Complications of labor and delivery
- O80-O82Encounter for delivery
- O85-O92Complications predominantly related to the puerperium
- O94-O9AOther obstetric conditions, not elsewhere classified
Chapter 16 (P00–P96) — Certain conditions originating in the perinatal period
- P00-P04Newborn affected by maternal factors and by complications of pregnancy, labor, and delivery
- P05-P08Disorders of newborn related to length of gestation and fetal growth
- P09-P09Abnormal findings on neonatal screening
- P10-P15Birth trauma
- P19-P29Respiratory and cardiovascular disorders specific to the perinatal period
- P35-P39Infections specific to the perinatal period
- P50-P61Hemorrhagic and hematological disorders of newborn
- P70-P74Transitory endocrine and metabolic disorders specific to newborn
- P76-P78Digestive system disorders of newborn
- P80-P83Conditions involving the integument and temperature regulation of newborn
- P84-P84Other problems with newborn
- P90-P96Other disorders originating in the perinatal period
Chapter 17 (Q00–Q99) — Congenital malformations, deformations and chromosomal abnormalities
- Q00-Q07Congenital malformations of the nervous system
- Q10-Q18Congenital malformations of eye, ear, face and neck
- Q20-Q28Congenital malformations of the circulatory system
- Q30-Q34Congenital malformations of the respiratory system
- Q35-Q37Cleft lip and cleft palate
- Q38-Q45Other congenital malformations of the digestive system
- Q50-Q56Congenital malformations of genital organs
- Q60-Q64Congenital malformations of the urinary system
- Q65-Q79Congenital malformations and deformations of the musculoskeletal system
- Q80-Q89Other congenital malformations
- Q90-Q99Chromosomal abnormalities, not elsewhere classified
Chapter 18 (R00–R99) — Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
- R00-R09Symptoms and signs involving the circulatory and respiratory systems
- R10-R19Symptoms and signs involving the digestive system and abdomen
- R20-R23Symptoms and signs involving the skin and subcutaneous tissue
- R25-R29Symptoms and signs involving the nervous and musculoskeletal systems
- R30-R39Symptoms and signs involving the genitourinary system
- R40-R46Symptoms and signs involving cognition, perception, emotional state and behavior
- R47-R49Symptoms and signs involving speech and voice
- R50-R69General symptoms and signs
- R70-R79Abnormal findings on examination of blood, without diagnosis
- R80-R82Abnormal findings on examination of urine, without diagnosis
- R83-R89Abnormal findings on examination of other body fluids, substances and tissues, without diagnosis
- R90-R94Abnormal findings on diagnostic imaging and in function studies, without diagnosis
- R97-R97Abnormal tumor markers
- R99-R99Ill-defined and unknown cause of mortality
Chapter 19 (S00–T88) — Injury, poisoning and certain other consequences of external causes
- S00-S09Injuries to the head
- S10-S19Injuries to the neck
- S20-S29Injuries to the thorax
- S30-S39Injuries to the abdomen, lower back, lumbar spine, pelvis and external genitals
- S40-S49Injuries to the shoulder and upper arm
- S50-S59Injuries to the elbow and forearm
- S60-S69Injuries to the wrist, hand and fingers
- S70-S79Injuries to the hip and thigh
- S80-S89Injuries to the knee and lower leg
- S90-S99Injuries to the ankle and foot
- T07-T07Injury, poisoning and certain other consequences of external causes
- T14-T14Injury of unspecified body region
- T15-T19Effects of foreign body entering through natural orifice
- T20-T25Burns and corrosions
- T26-T28Burns and corrosions confined to eye and internal organs
- T30-T32Burns and corrosions of multiple and unspecified body regions
- T33-T34Frostbite
- T36-T50Poisoning by, adverse effects of and underdosing of drugs, medicaments and biological substances
- T51-T65Toxic effects of substances chiefly nonmedicinal as to source
- T66-T78Other and unspecified effects of external causes
- T79-T79Certain early complications of trauma
- T80-T88Complications of surgical and medical care, not elsewhere classified
Chapter 20 (V00–Y99) — External causes of morbidity
- V00-V09Accidents
- V10-V19Pedal cycle rider injured in transport accident
- V20-V29Motorcycle rider injured in transport accident
- V30-V39Occupant of three-wheeled motor vehicle injured in transport accident
- V40-V49Car occupant injured in transport accident
- V50-V59Occupant of pick-up truck or van injured in transport accident
- V60-V69Occupant of heavy transport vehicle injured in transport accident
- V70-V79Bus occupant injured in transport accident
- V80-V89Other land transport accidents
- V90-V94Water transport accidents
- V95-V97Air and space transport accidents
- V98-V99Other and unspecified transport accidents
- W00-W19Other external causes of accidental injury
- W20-W49Exposure to inanimate mechanical forces
- W50-W64Exposure to animate mechanical forces
- W65-W74Accidental non-transport drowning and submersion
- W85-W99Exposure to electric current, radiation and extreme ambient air temperature and pressure
- X00-X08Exposure to smoke, fire and flames
- X10-X19Contact with heat and hot substances
- X30-X39Exposure to forces of nature
- X50-X50Overexertion and strenuous or repetitive movements
- X52-X58Accidental exposure to other specified factors
- X71-X83Intentional self-harm
- X92-Y09Assault
- Y21-Y33Event of undetermined intent
- Y35-Y38Legal intervention, operations of war, military operations, and terrorism
- Y62-Y69Complications of medical and surgical care
- Y70-Y82Medical devices associated with adverse incidents in diagnostic and therapeutic use
- Y83-Y84Surgical and other medical procedures as the cause of abnormal reaction of the patient, or of later complication, without mention of misadventure at the time of the procedure
- Y90-Y99Supplementary factors related to causes of morbidity classified elsewhere
Chapter 21 (Z00–Z99) — Factors influencing health status and contact with health services
- Z00-Z13Persons encountering health services for examinations
- Z14-Z15Genetic carrier and genetic susceptibility to disease
- Z16-Z16Resistance to antimicrobial drugs
- Z17-Z17Estrogen, and other hormones and factors receptor status
- Z18-Z18Retained foreign body fragments
- Z19-Z19Hormone sensitivity malignancy status
- Z20-Z29Persons with potential health hazards related to communicable diseases
- Z30-Z39Persons encountering health services in circumstances related to reproduction
- Z40-Z53Encounters for other specific health care
- Z55-Z65Persons with potential health hazards related to socioeconomic and psychosocial circumstances
- Z66-Z66Do not resuscitate status
- Z67-Z67Blood type
- Z68-Z68Body mass index [BMI]
- Z69-Z76Persons encountering health services in other circumstances
- Z77-Z99Persons with potential health hazards related to family and personal history and certain conditions influencing health status
Chapter 22 (U00–U85) — Codes for special purposes
Outside the numbered chapter ranges
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