Summary & Overview

HCPCS Level II H0008: Sub-acute Detoxification, Residential Inpatient

HCPCS Level II code H0008 designates sub-acute detoxification services provided in a residential inpatient addiction treatment setting. The code identifies structured medical and psychosocial services focused on managing withdrawal and stabilizing patients with alcohol or drug dependence before transition to ongoing treatment. Nationally, accurate use of this code helps classify levels of care for substance use disorder services and supports consistent claims processing and coverage determinations across payers.

Key payers discussed include Aetna, Blue Cross Blue Shield, Cigna Health, and UnitedHealthcare. The publication outlines payer coverage patterns, billing considerations, and clinical context relevant to inpatient sub-acute detoxification. It highlights common scenarios in which H0008 is applied and differentiates it from related detoxification service codes used for outpatient or acute inpatient settings.

Readers will find concise benchmarks for typical site of service coding, guidance on clinical documentation needed to support inpatient residential detoxification claims, and an overview of associated diagnostic contexts for which this code is commonly billed. Where specific data elements were not provided in the source, the text notes: "Data not available in the input." The summary is intended for billing managers, coding professionals, and policy analysts seeking a clear national overview of HCPCS Level II code H0008 and its role in substance abuse treatment billing.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareH0008HCPCS Level IISubstance Abuse TreatmentDetoxificationResidential InpatientInpatient HospitalBehavioral HealthBilling and Coding

Billing Code Overview

HCPCS Level II code H0008 represents Alcohol and/or drug services; sub-acute detoxification (residential addiction program inpatient). This code is used to report structured substance abuse treatment services delivered in a sub-acute residential inpatient setting. The service type is Substance Abuse Treatment, and the typical site of service is Inpatient Hospital (POS 21).

Data not available in the input.

Clinical & Coding Specifications

Clinical Context

A 38-year-old patient with documented alcohol dependence presents to the inpatient unit with signs of withdrawal (tachycardia, tremor, agitation) after cessation of heavy drinking. The hospital evaluates medically, admits the patient to a residential addiction program for sub-acute detoxification, initiates symptom-directed medications, conducts nursing monitoring, psychosocial assessment, and structured group sessions during the inpatient stay. The clinical workflow includes triage and medical clearance in the emergency department or admission unit, physician and addiction psychiatry consult as needed, daily medical and nursing assessments, counseling by an addiction counselor, and discharge planning with outpatient referral.

Coding Specifications

HCPCS Level II code H0008: Alcohol and/or drug services; sub-acute detoxification (residential addiction program inpatient).
Common Modifiers:
52 Reduced Services: Use when the service is partially reduced or not provided as originally planned (for example, shortened length of stay or limited scope of services delivered relative to full sub-acute detoxification program).
59 Distinct Procedural Service: Use when a separate, identifiable service distinct from other services on the same day is provided (for example, when a distinct episode of sub-acute detoxification is billed separately from other concurrent procedures).
Associated provider taxonomies:
101YA0400X — Addiction Counselor (represents credentialed counselors providing counseling and psychosocial support in substance use treatment programs).
103TP2701X — Psychologist, Addiction (Substance Use Disorder) (represents licensed psychologists specializing in assessment and psychotherapy for substance use disorders).
2084P0800X — Psychiatry & Neurology, Addiction Psychiatry (represents psychiatrists with specialty training in addiction psychiatry who may manage medical/psychiatric aspects of detoxification).

Related Diagnoses

F10.239 — Alcohol dependence with withdrawal, unspecified

Clinical relevance: Identifies alcohol dependence presenting with withdrawal symptoms that commonly necessitate sub-acute detoxification services as described by HCPCS Level II code H0008.
F11.20 — Opioid dependence, uncomplicated

Clinical relevance: Indicates opioid dependence without complications; may co-occur in patients admitted for sub-acute detoxification when multiple substances are involved and services address stabilizing dependence.
F19.20 — Other psychoactive substance dependence, uncomplicated

Clinical relevance: Captures dependence on other psychoactive substances; relevant when sub-acute residential detoxification is provided for non-opioid, non-alcohol substances.
F10.10 — Alcohol abuse, uncomplicated

Clinical relevance: Represents alcohol abuse without complications; may be an admitting diagnosis for patients entering sub-acute detoxification programs when abuse rather than dependence is documented.
F11.23 — Opioid dependence with withdrawal

Clinical relevance: Specifies opioid dependence accompanied by withdrawal, a clinical scenario that can require structured detoxification services in an inpatient residential setting billed with HCPCS Level II code H0008.

Related Codes

H0010 — Alcohol and/or drug services; sub-acute detoxification (residential addiction program outpatient).

Relation: Outpatient counterpart to H0008; used when sub-acute detoxification services are delivered in an outpatient/residential outpatient setting rather than inpatient.
H0011 — Alcohol and/or drug services; acute detoxification (residential addiction program inpatient).

Relation: Represents a higher-acuity, medically intensive inpatient detoxification service; may be used as an alternative when patient requires acute medical management rather than sub-acute care.
H0012 — Alcohol and/or drug services; sub-acute detoxification (residential addiction program outpatient).

Relation: Appears as an outpatient sub-acute detoxification code similar to H0010; alternative outpatient code for sub-acute services.
H0014 — Alcohol and/or drug services; ambulatory detoxification.

Relation: Used for ambulatory (non-residential) detoxification services; may be used instead of H0008 when detoxification is provided on an outpatient ambulatory basis rather than inpatient residential.
Common usage notes: H0010 and H0012 are outpatient/sub-acute alternatives; H0011 denotes acute inpatient detoxification and is clinically distinct from H0008; H0014 denotes ambulatory detoxification and is an outpatient alternative.

National Reimbursement Benchmarks

National mean rates for HCPCS Level II code H0008 show that BUCA (the aggregate commercial benchmark) at $289.42 sits well above Medicare at $0.00 in the provided input, indicating a substantial gap between average commercial reimbursements and the Medicare value supplied. Aetna reports the highest mean at $370.07, followed by BUCA at $289.42, Cigna Health at $153.93, Blue Cross Blue Shield at $111.72, and UnitedHealthcare at $101.58.

Rate dispersion (P75 minus P25) varies across payers. Blue Cross Blue Shield and BUCA show relatively wide dispersion (BCBS: $68.40 range; BUCA: $266.50 range), while Cigna Health and UnitedHealthcare are tighter (Cigna: $10.00 range; UnitedHealthcare: $7.67 range). Aetna has a moderate dispersion of $248.00. The table and chart below present the full breakdown.

National Mean Rates for HCPCS Level II code `H0008` by Payer

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