CurrentUnitedHealthcarePolicy CS356NM.C

Hospital Services: Observation and Inpatient (for New Mexico Only)

Defines UnitedHealthcare's medical policy for observation services and inpatient level of care determinations for members in New Mexico, referencing InterQual criteria and listing common conditions appropriate for observation. Excludes obstetric members and clarifies time-based expectations for escalation to inpatient review.

Policy Summary

PayerUnitedHealthcare

PolicyHospital Services: Observation and Inpatient (for New Mexico Only)

Policy CodePolicy CS356NM.C

Change TypeRevised language removing prior time-based and 'at least one of' criteria

Effective DateDec 1, 2025

Next Review Date

Key ActionSupport observation or inpatient level of care decisions with applicable InterQual LOC criteria and independent professional medical judgment; document criteria used.

SourceLink

POLICY UPDATE CHANGES

Removed language indicating observation services are medically necessary for members requiring short-term monitoring expected to require at least 6 hours of assessment or treatment and improve within 24-48 hours and the prior 'at least one of' list.

24-48hExpected observation improvement window

48hTime to submit additional info to support inpatient

1State-specific policy (New Mexico only)

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This policy defines UnitedHealthcare's medical policy for hospital observation and inpatient level of care determinations for members in New Mexico, using InterQual Level of Care criteria to support medical necessity and level of care decisions. The policy effective date is December 1, 2025 and the last review date is December 1, 2025.

Scope: Applies only to members in New Mexico and references InterQual LOC (Acute Adult and Acute Pediatric) to determine appropriateness of observation services; the policy explicitly excludes obstetric members during pregnancy, childbirth, and the postpartum period.

Expected observation improvement window24-48 hours

Time to submit additional info to support inpatient48 hours

State-specific policyNew Mexico only

Observation Level of Care - General Coverage Criteria

Observation services may be medically necessary when supported by InterQual criteria and clinical judgment. If condition does not improve within 48 hours, additional information should be submitted to support inpatient care.

InterQual Level of Care requirement: Care must meet applicable InterQual Level of Care (LOC) criteria (Acute Adult or Acute Pediatric) and be used in connection with independent professional medical judgment of a qualified health care provider.
Reference: InterQual Level of Care (LOC): Acute Adult and Acute Pediatric.
Intent and expected improvement window: Observation services are intended for short-term monitoring, assessment, treatment and reassessment that are expected to improve significantly within 24-48 hours.24-48 hours
Removed prior explicit language about 'at least 6 hours' and 'at least one of' (see revision history).
Escalation if no improvement: If the individual's condition does not improve within 48 hours, additional clinical information should be submitted to support inpatient level of care.48 hours
Submit additional clinical information to support inpatient level of care if no improvement within 48 hours.
Common clinical conditions often managed in observation (list not all-inclusive)
- Abdominal pain
- Allergic reaction (generalized)
- Altered mental status (confusion)
- Anemia
- Asthma
- Atrial fibrillation
- Back pain
Non-medical necessity exclusions: Observation services are not medically necessary for the convenience of the hospital, physicians, individuals, or individuals' families, or while awaiting placement to another health care facility.
Claims may be denied if provided solely for convenience.
Obstetric exclusion: Observation services portion of this policy does not apply to an obstetric member during pregnancy, childbirth, or the postpartum period.

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Provider Actions and Documentation Requirements

Documentation Required

Use InterQual criteria and clinical judgment

Support observation or inpatient level of care decisions with applicable InterQual Level of Care criteria and the independent professional medical judgment of a qualified health care provider. Document which InterQual criteria were used to support the level of care determination.

Document criteria used.

Prior Authorization

Additional information for inpatient if >48 hours

If a member's condition does not improve within 48 hours of observation, submit additional clinical information to support inpatient level of care. This additional information should be provided to justify escalation from observation to inpatient services.

Failure to provide may risk denial for inpatient billing.

Denial Risk

Non-medical necessity exclusions

Observation services provided solely for the convenience of the hospital, physicians, members, or members' families, or while awaiting placement to another health care facility are not medically necessary and may be denied.

Background and Evidence

UnitedHealthcare uses InterQual Level of Care (LOC) criteria, in connection with independent professional medical judgment of a qualified health care provider, to support medical necessity and level of care decisions for observation versus inpatient care. Observation is described as a short-term level of care intended for monitoring, assessment, treatment, and reassessment when clinical improvement is expected within a defined short window; if condition does not improve, escalation to inpatient review is required with additional information.

Definition — Observation services: Short-term monitoring, assessment, treatment, and reassessment care level intended to determine if inpatient admission is needed; governed by InterQual LOC criteria and clinical judgment.

Primary evidence source: InterQual Level of Care (Acute Adult and Acute Pediatric).

Reference text: Rosen's Emergency Medicine, 10th ed., Observation medicine and clinical decision units (overview).

Not Medically Necessary / Exclusions

Observation services are not medically necessary when provided solely for the convenience of the hospital, physicians, members, or members' families, or while awaiting placement to another health care facility.

The observation portion of this policy does not apply to obstetric members during pregnancy, childbirth, or the postpartum period.

If an individual's condition does not improve within 48 hours of observation, additional clinical information should be submitted to support an inpatient level of care; failure to provide supporting information may risk denial for inpatient billing.