CurrentColorado Rocky Mountain Health PlansPolicy N/A

Medicare Advantage hospital inpatient admission review process

Describes UnitedHealthcare Medicare Advantage's medical necessity review process for inpatient hospital admissions, including use of the two-midnight benchmark, case-by-case exception, and sources of criteria (InterQual, Medicare rules). Applies to UnitedHealthcare Medicare Advantage members and providers submitting inpatient claims.

Policy Summary

PayerColorado Rocky Mountain Health Plans

PolicyMedicare Advantage hospital inpatient admission review process

Policy CodePolicy N/A

Change TypeNo material change

Effective DateJan 1, 2024

Next Review DateN/A

Key ActionDocument the admitting physician's reasonable expectation that the patient requires hospital care crossing two midnights, or document the clinical reason if the stay does not meet that expectation.

SourceLink

POLICY UPDATE CHANGES

No material clinical or coverage changes in this revision.

followedTwo-midnight benchmark

not followedTwo-midnight presumption

usedCase-by-case exception

yesFollows IPO list

Inpatient Admission Coverage Criteria

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Inpatient admission coverage criteria and exceptions

Covered as inpatient when medical necessity is supported by documentation meeting Medicare Advantage criteria and applicable guidance; time alone is insufficient.

Primary requirement: Admitting physician documents a reasonable expectation that the patient requires hospital care that will cross two midnights.expectation of care crossing 2 midnights

UnitedHealthcare applies the Hospital, Emergency and Ambulance Services Medicare Advantage medical policy, UnitedHealthcare Commercial Hospital Services: Observation and Inpatient policy, and InterQual as sources of evidence.

Exceptions where <24 hours or <2 midnights may still be appropriate: Unexpected death; unexpected discharge against medical advice; unexpected transfer; unexpected hospice; unexpected rapid improvement.N/A

Physician must document the reasonable expectation that the stay would cross two midnights and the reason why it did not.

Case-by-case exception: When the patient is not expected to require care crossing two midnights, a UnitedHealthcare medical director may review documented complex medical factors (history, comorbidities, severity, current needs, risk of adverse event) to determine inpatient payment eligibility.clinical judgment by medical director

Used when two-midnight expectation is not present.

Inpatient-only procedures: Inpatient admissions where a medically necessary inpatient-only procedure is performed meet criteria for inpatient admission regardless of expected or actual length of stay.procedure on CMS IPO list

Follows CMS Inpatient Only (IPO) list.

Hospital care that is custodial, provided for the convenience of the patient or provider, or not required for the diagnosis or treatment of illness or injury is not appropriate for inpatient coverage or payment. Reviewers will evaluate whether the documented clinical complexity and medical necessity support an inpatient level of care rather than custodial or convenience care. Any extensive delays in provision of medically necessary services are excluded from time counted toward the two‑midnight benchmark.

Hospital stays of less than 24 hours generally do not qualify for inpatient payment. When an inpatient admission does not span two midnights, UnitedHealthcare will review the medical record to determine whether documented complex medical factors support inpatient medical necessity. Exceptions where an admission that did not cross two midnights may still be appropriate for inpatient payment include unexpected death, unexpected discharge against medical advice, unexpected transfer, unexpected hospice, or unexpected rapid improvement. The physician must document the reasonable expectation that the stay would cross two midnights and the reason why it did not.

Provider Documentation & Operational Actions

Note

Use of internal coverage criteria

UnitedHealthcare Medicare Advantage medical policies and InterQual criteria may be used as internal coverage criteria when Original Medicare statutes, NCDs or LCDs do not fully establish specific medical necessity criteria. CMS permits plans to adopt internal coverage criteria based on current evidence, and InterQual may be used as a source of medical evidence to assist in those determinations.

Applies when Original Medicare laws, NCDs, or LCDs do not provide specific criteria
UnitedHealthcare develops Medicare Advantage medical policies and may reference UnitedHealthcare Commercial Hospital Services: Observation and Inpatient policy and InterQual

Denial Risk

(Blank inventory entry) — provider-action highlight

Include any provider-action highlight from the source document: when an inpatient admission does not meet inpatient-level medical necessity based on documented complex medical factors and the admitting physician’s reasonable expectation that the stay would cross two midnights, the admission may be denied. Documentation must support the expectation and the reasons if the stay did not cross two midnights.

Denials may occur when documentation does not support the admitting physician’s reasonable expectation
Reviewers apply Hospital, Emergency and Ambulance Services Medicare Advantage medical policy, UnitedHealthcare Commercial Hospital Services: Observation and Inpatient medical policy, and InterQual criteria

Documentation Required

Physician expectation and reasons for shorter stay

Document the admitting physician’s reasonable expectation that the patient’s stay would cross two midnights and, if the stay did not, record the clinical reason(s) why it did not (for example: unexpected death, discharge against medical advice, transfer, hospice enrollment, or rapid unexpected improvement). Reviewers will consider these explanations when assessing whether an inpatient admission that did not cross two midnights is appropriate for payment.

Expectation that stay would cross two midnights must be documented in the medical record
If stay <2 midnights, document the specific reason why it did not (unexpected death, AMA discharge, transfer, hospice, rapid improvement)

Denial Risk

Inpatient admission denials

Inpatient admissions will be denied when the documentation does not support the admitting physician’s reasonable expectation that the patient required inpatient-level care (i.e., care reasonably expected to span two midnights) or when hospital care is custodial, for convenience, or not required for diagnosis or treatment. Time alone (two midnights) is not sufficient — reviewers assess the complex medical factors in the record and apply UnitedHealthcare and InterQual criteria. Delays in provision of medically necessary services are excluded from the two-midnight calculation.

Admissions lacking documentation of reasonable expectation for two-midnight stay may be denied
Custodial or convenience care is not appropriate for inpatient coverage
Delays in medically necessary services are excluded from time counted toward two midnights

Admission Criteria (Initial Determination)

SNF | hospital inpatient

Admission to inpatient hospital versus SNF should be based on documented medical necessity and the admitting physician's expectation regarding length and complexity of care.

Admission meets inpatient level of care: Admitting physician documents reasonable expectation that the patient requires hospital care crossing two midnights and clinical complexity supports need for inpatient services. Member must require skilled, physician-directed inpatient hospital services supported by documented complex medical factors; custodial or convenience care is not skilled care.

Criteria for Continued Inpatient Stay

hospital inpatient continued-stay criteria

Continued inpatient care is covered only when ongoing documentation supports the medical necessity of remaining at the inpatient level.

Continued inpatient care: Ongoing documentation of complex medical factors (history, comorbidities, severity of signs and symptoms, current needs, risk of adverse events) must support continuation of inpatient care. If the admitting physician's expectation changes or the patient is not expected to cross two midnights, a UnitedHealthcare medical director may adjudicate continued stay eligibility under the case-by-case exception.

Discharge Considerations

Discharge from inpatient status may occur before two midnights; when it does, the medical record must explain the circumstances. If an admission ends prior to the expected two‑midnight benchmark, documentation should record the admitting physician’s reasonable expectation and any unexpected events (for example, death, transfer, discharge against medical advice, hospice enrollment, or rapid clinical improvement) that justify the shorter stay. Continuing inpatient care requires ongoing documentation of complex medical factors to support the need for inpatient services; absent such documentation, transition to discharge or an alternate setting should be considered.

Day Limits & Short Stay Rules

Short-stay rules

General rule for short staysStays under 24 hours rarely qualify for inpatient payment; inpatient coverage requires documentation that services were reasonable and necessary.

Exceptions that may allow inpatient payment for <24 hoursUnexpected death; unexpected discharge against medical advice; unexpected transfer; unexpected hospice; unexpected rapid improvement — may justify inpatient payment if documented.

Documentation requirementMedical record must document the admitting physician's reasonable expectation that the stay would cross two midnights and, if it did not, the reason why (e.g., one of the listed unexpected events).

Review standardsReviewers will apply Hospital, Emergency and Ambulance Services Medicare Advantage policy, UnitedHealthcare Commercial Hospital Services: Observation and Inpatient policy, and InterQual criteria as sources of medical evidence.