42 CFR § 484.55

What does 42 CFR § 484.55 require?

42 CFR 484.55 is THE foundational HHA Condition of Participation — every Medicare/Medicaid home health patient must get a comprehensive assessment within 5 days of start-of-care, with an initial visit within 48 hours of referral. The assessment captures the patient's status, sets care goals, and triggers the plan of care under 42 CFR 484.60. For Medicare patients, the assessment must collect OASIS data — the standardized federal home health outcome dataset. Missing assessments, late assessments, or incomplete OASIS items are among the top CMS survey findings. A condition-level deficiency on 484.55 can put an HHA on a 90-day plan of correction with re-survey.

Who must comply with 42 CFR § 484.55?

All Medicare and Medicaid certified Home Health Agencies (HHAs). The Conditions of Participation under 42 CFR Part 484 apply to every certified HHA — not optional. Private-duty home health agencies that don't bill Medicare/Medicaid are governed by state-specific licensure rules, which often mirror the federal CoPs.

What happens if you violate 42 CFR § 484.55?

CMS survey deficiencies. Standard-level deficiency (one or more standards within the CoP cited): plan of correction required. Condition-level deficiency (broad CoP failure): plan of correction + 23-day re-survey requirement; risk of Medicare/Medicaid certification termination if not corrected. Civil Monetary Penalties (CMPs) for HHAs: $11,317-$25,000 per day per CoP deficiency. State licensure consequences in addition. Combined exposure: $100K-$500K+ for a single comprehensive assessment failure across multiple patients.

How to comply (implementation checklist)

1. 1Establish referral-receipt workflow that documents date/time of referral.
2. 2Schedule initial assessment within 48 hours of referral (or per physician-ordered SOC date).
3. 3Conduct comprehensive assessment within 5 calendar days of SOC.
4. 4Use OASIS for Medicare/Medicaid patients — complete all required data items.
5. 5Use RN for nursing services initial assessment; appropriate qualified discipline for therapy-only.
6. 6Document patient goals consistent with assessment findings.
7. 7Trigger care planning under 42 CFR 484.60 from the comprehensive assessment.
8. 8Reassess at required intervals (recertification, significant change in condition, transfer, discharge).
9. 9Audit assessment timeliness monthly across the patient census.
10. 10Train clinicians on OASIS item-by-item accuracy.

Common misinterpretations

• Misinterpretation: 'The 48-hour rule means business days.' Reality: 42 CFR 484.55(a) specifies 48 hours from referral — calendar hours, not business hours. Weekend/holiday referrals require weekend/holiday initial visits unless the physician orders a later start of care.
• Misinterpretation: 'OASIS is just for billing.' Reality: OASIS is the assessment instrument required by 42 CFR 484.55 AND 484.45. It captures patient status, drives the plan of care, determines reimbursement, and feeds Home Health Compare quality metrics. Inaccurate OASIS = inaccurate plan of care = potential 484.60 deficiency too.
• Misinterpretation: 'A PT can do the initial assessment for a wound-care patient.' Reality: 42 CFR 484.55(b) requires a registered nurse (RN) for nursing services. For therapy-only patients, the appropriate qualified discipline (PT, OT, or SLP) can conduct the initial assessment. Wound care = nursing service = RN required.
• Misinterpretation: 'Late assessments can be corrected after the fact.' Reality: The 5-day comprehensive assessment deadline is the regulation. Missing it creates a citable deficiency regardless of subsequent corrective action. The 'corrected' assessment doesn't undo the original violation.

Real enforcement examples

Anonymized from public CMS enforcement summaries. Penalty amounts reflect assessed and final settled values where disclosed.

Frequently asked questions

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