Conditions of Participation · 42 CFR Part 484
§484.45 Condition of participation: Reporting OASIS information.
The regulation text and CMS’s interpretive guidelines for every survey tag under this condition, quoted from the State Operations Manual, Appendix B (Rev. 245).
§484.45 Condition of participation: Reporting OASIS information.
On the 2567: Reporting Oasis Information
HHAs must electronically report all OASIS data collected in accordance with §484.55.
CMS’s guidance for this tag
Interpretive Guidelines §484.45
The home health regulations at §484.55 require that each patient receive from the HHA a patient-specific, comprehensive assessment. As part of the comprehensive assessment of adult skilled patients, HHAs are required to use a standard core assessment data set, the OASIS. The OASIS data collection set must include the data elements listed in §484.55(c)(8) and be collected and updated per the requirements under §484.55(d).
(Rev. 219; Issued: 04-12-24; Effective: 04-12-24; Implementation: 04-12-24)
§484.45(a) Standard: Encoding and transmitting OASIS data. An HHA must encode and electronically transmit each completed OASIS assessment to the CMS system, regarding each beneficiary with respect to which information is required to be transmitted (as determined by the Secretary), within 30 days of completing the assessment of the beneficiary.
On the 2567: Encoding And Transmitting Oasis
CMS’s guidance for this tag
Interpretive Guidelines §484.45(a)
“CMS system” means the national internet Quality Improvement Evaluation System (iQIES).
“Encode” means to enter OASIS information into a computer.
“Transmit” means electronically send OASIS information, from the HHA directly to the CMS system.
An HHA must transmit a completed OASIS to the CMS system for all Medicare patients, Medicaid patients, and patients utilizing any federally funded health plan options that are part of the Medicare program (e.g., Medicare Advantage (MA) plans). An HHA must also transmit an OASIS assessment for all Medicaid patients receiving services under a waiver program receiving services subject to the Medicare Conditions of Participation as determined by the State.
Exceptions to the transmittal requirements are patients:
• Under age 18; • Receiving maternity services; • Receiving housekeeping or chore services only; • Receiving only personal care services; and • Patients for whom Medicare or Medicaid insurance is not billed.
The OASIS reporting regulations are not applicable to patients receiving personal care only services, regardless of payor source.
As long as the submission time frame is met, HHAs are free to develop schedules for transmission of the OASIS assessments that best suit their needs.
(Rev. 219; Issued: 04-12-24; Effective: 04-12-24; Implementation: 04-12-24)
§484.45(b) Standard: Accuracy of encoded OASIS data. The encoded OASIS data must accurately reflect the patient's status at the time of assessment.
On the 2567: Accuracy Of Encoded Oasis Data
CMS’s guidance for this tag
Interpretive Guidelines §484.45(b)
“Accurate” means that the OASIS data transmitted to CMS is consistent with the status of the patient at the time the OASIS was completed.
(Rev. 219; Issued: 04-12-24; Effective: 04-12-24; Implementation: 04-12-24)
§484.45(c) Standard: Transmittal of OASIS data. An HHA must—
On the 2567: Oasis Data Transmission Format
(1) For all completed assessments, transmit OASIS data in a format that meets the requirements of paragraph (d) of this section.
CMS’s guidance for this tag
Interpretive Guidelines §484.45(c)(1)
Successful transmission of OASIS data is verified through validation and feedback reports from iQIES. Although not required by the regulation, it is recommended that the HHA keep copies of the electronic validation records, that indicate transmission was successful, for twelve months, or until the next set of reports are available. The validation reports may be needed as evidence if the HHA receives a denial from the Medicare Administrative Contractor (MAC) for missing OASIS assessments.
(Rev. 219; Issued: 04-12-24; Effective: 04-12-24; Implementation: 04-12-24)
§484.45(c) Standard: Transmittal of OASIS data. An HHA must—
On the 2567: Transmit Data Using Compliant Software
(2) Transmit data using electronic communications software that complies with the Federal Information Processing Standard (FIPS 140-2, issued May 25, 2001) from the HHA or the HHA contractor to the CMS collection site.
CMS’s guidance for this tag
Interpretive Guidelines §484.45(c)(2)
HHAs may directly transmit OASIS data (to the national data repository) via iQIES or other software that conforms to the FIPS 140-2.
(Rev. 219; Issued: 04-12-24; Effective: 04-12-24; Implementation: 04-12-24)
§484.45(c) Standard: Transmittal of OASIS data. An HHA must—
(3) Transmit data that includes the CMS-assigned branch identification number, as applicable.
(Rev. 219; Issued: 04-12-24; Effective: 04-12-24; Implementation: 04-12-24)
§484.45(d) Standard: Data Format.
On the 2567: Data Format
The HHA must encode and transmit data using the software available from CMS or software that conforms to CMS standard electronic record layout, edit specifications, and data dictionary, and that includes the required OASIS data set.
(Rev. 219; Issued: 04-12-24; Effective: 04-12-24; Implementation: 04-12-24)
Current CFR text, 42 CFR 484.45 as revised 2025-10-01 (govinfo)
§ 484.45 Condition of participation: Reporting OASIS information.
HHAs must electronically report all OASIS data collected in accordance with § 484.55.
(a) Standard: Encoding and transmitting OASIS data. An HHA must encode and electronically transmit each completed OASIS assessment to the CMS system, regarding each beneficiary with respect to which information is required to be transmitted (as determined by the Secretary), within 30 days of completing the assessment of the beneficiary.
(b) Standard: Accuracy of encoded OASIS data. The encoded OASIS data must accurately reflect the patient's status at the time of assessment.
(c) Standard: Transmittal of OASIS data. An HHA must—
(1) For all completed assessments, transmit OASIS data in a format that meets the requirements of paragraph (d) of this section.
(2) Transmit data using electronic communications software that complies with the Federal Information Processing Standard (FIPS 140-2, issued May 25, 2001) from the HHA or the HHA contractor to the CMS collection site.
(3) Transmit data that includes the CMS-assigned branch identification number, as applicable.
(d) Standard: Data Format. The HHA must encode and transmit data using the software available from CMS or software that conforms to CMS standard electronic record layout, edit specifications, and data dictionary, and that includes the required OASIS data set.
Read with this
Source: State Operations Manual, Appendix B - Guidance to Surveyors: Home Health Agencies (Rev. 245, issued 08-05-26), text extracted from the PDF with pdftotext, retrieved 2026-10-09, and 42 CFR Part 484, annual edition revised as of October 1, 2025 (govinfo XML granules). Works of the US Government are in the public domain.
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