M1233 HCV Antibody Test — HCPCS Reimbursement | OpenPayer

Summary & Overview

HCPCS M1233: HCV Antibody Test Not Performed or Results Not Documented

HCPCS Level II code M1233 denotes a missing or undocumented hepatitis C virus (HCV) antibody test result—either the patient did not receive the HCV antibody test or testing occurred but results were not recorded and no reason was provided. Nationally, accurate documentation of HCV testing is important for public health surveillance, continuity of care, and quality measurement associated with infectious disease screening programs. Incomplete documentation can affect care coordination and quality reporting across outpatient and ambulatory settings. Key payers considered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will get a concise explanation of what M1233 represents, the clinical and administrative contexts where it applies, and the implications for billing and recordkeeping. The publication outlines typical sites of service and the service type tied to this code, summarizes payer coverage considerations at a national level, and identifies where data are not available in the input. Benchmarks, policy updates, and clinical context relevant to HCV screening documentation are highlighted to help administrators and coding professionals understand when M1233 is used and why accurate documentation matters for quality and reporting.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareMedicareM1233HCPCS Level IIHCV antibodyhepatitis Clab documentationoutpatientambulatory carequality measurementmedical billing

Billing Code Overview

HCPCS Level II code M1233 indicates that a patient does not receive an HCV antibody test or that a patient does receive an HCV antibody test but the results are not documented and no reason is given. This code captures instances where hepatitis C virus (HCV) antibody testing is absent from the medical record or where testing occurred but results are missing from documentation without an explained justification.

Service type: HCV antibody testing status documentation (lab/testing documentation)
Typical site of service: Ambulatory clinic or outpatient testing settings where HCV screening and documentation normally occur

Clinical & Coding Specifications

Clinical Context

A typical outpatient primary care or infectious disease visit where screening for hepatitis C virus (HCV) antibody is indicated but not performed or test result documentation is missing. Example scenario: A 52-year-old patient with a history of intravenous drug use presents for a routine visit. The clinician discusses HCV screening and orders an antibody test, but the patient declines blood draw at that visit. Alternatively, the test was performed at an external laboratory and the result was not uploaded to the electronic medical record. Workflow steps: the clinician documents the indication for HCV screening, documents that the test was either not performed or that results are unavailable in the chart, selects billing code M1233 to indicate the absence of documented HCV antibody testing, and may add an appropriate modifier to reflect circumstances (for example, patient refusal or service interrupted). The typical site of service is an ambulatory clinic (office-based primary care, infectious disease clinic, or urgent care).

Coding Specifications

Modifier	Description	When to Use
`22`	Increased procedural services	Use when documentation supports substantially greater resources for counseling or coordination related to HCV testing documentation issues.

HCPCS M1191: Hospice Services During Measurement Period

HCPCS-M1378-COLORECTAL-SURVEILLANCE-INTERVAL-JUSTIFICATION

HCPCS M1378: Documentation of Medical Reason for Not Recommending 10-Year Follow-Up

HCPCS-M1319-CSP-CONTACT-AFTER-POSITIVE-HRSN-SCREENING

HCPCS M1319: CSP Contact After Positive High-Risk Screening

HCPCS-M1152-HEART-TRANSPLANT-LVAD-PATIENT

HCPCS M1152: Heart Transplant or LVAD Patient

HCPCS-M1325-NOT-SEEN-CLINICIAN-DOCUMENTED-MEDICAL-REASONS

HCPCS Level II M1325: Clinician-Documented Patient Not Seen for Ophthalmic Reasons

HCPCS-M1295-TOTAL-COLECTOMY-COLORECTAL-CANCER-HISTORY

HCPCS Level II M1295: Total Colectomy or Colorectal Cancer History

HCPCS-M1204-INITIAL-SYMPTOM-SEVERITY-ASSESSMENT-NRS-VRS-ITCHYQUANT

HCPCS M1204: Initial Symptom Severity Assessment (NRS/VRS/ItchyQuant)

HCPCS-M1352-SUICIDAL-IDEATION-BEHAVIOR-C-SSRS-ASSESSMENT

HCPCS M1352: Suicidal Ideation and Behavior Assessment

HCPCS-M1192-ESOPHAGEAL-SQUAMOUS-CELL-CARCINOMA-PATIENT-CLASSIFICATION

HCPCS Level II M1192: Esophageal Squamous Cell Carcinoma, Established Diagnosis

HCPCS-M1161-ANAPHYLAXIS-DUE-TO-TDAP-VACCINE-PEDIATRIC

HCPCS M1161: Anaphylaxis Due to Tetanus/Diphtheria/Pertussis Vaccine, Pediatric

Showing 1–10 of 356

23

Taxonomy Code	Specialty	Notes
`207Q00000X`	Family Medicine	Primary care clinicians commonly order and document HCV screening.
`207R00000X`	Internal Medicine	Internists perform routine HCV screening and manage follow-up testing.
`207L00000X`	Infectious Disease	Specialists manage HCV diagnosis and coordinate confirmatory testing when screening documentation is absent or incomplete.
`363LF0000X`	Clinical Laboratory	Laboratory providers perform the HCV antibody assay and report results; documentation gaps often originate here.
`261QM0800X`	Emergency Medicine	Emergency clinicians may screen for HCV in certain high-risk presentations and document testing status.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`Z11.59`	Encounter for screening for other viral diseases	Commonly used for asymptomatic HCV screening encounters when antibody testing is indicated but not documented.
`Z72.51`	High-risk sexual behavior	Risk factor prompting HCV screening; supports clinical indication when test is not completed or results are missing.
`F11.10`	Opioid abuse, uncomplicated	Substance use disorder history indicating HCV screening need; relevant when testing is declined or documentation absent.
`Z20.2`	Contact with and (suspected) exposure to infections with a predominantly sexual mode of transmission	May prompt HCV screening and explain missing test documentation.
`Z79.899`	Other long term drug therapy	Contextual diagnosis in patients on medications that may affect HCV management; supports documentation of screening decisions.
`Z71.7`	Human immunodeficiency virus [HIV] counseling	Co-testing contexts where HCV antibody testing may be ordered alongside HIV testing and documentation can be missed.
`R68.89`	Other general symptoms and signs	Non-specific presentations where screening may be ordered but not completed or documented.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`36415`	Collection of venous blood by venipuncture	Performed to obtain a specimen for HCV antibody testing when testing proceeds.
`86803`	Hepatitis C antibody; screening immunoassay for HCV	Directly corresponds to the HCV antibody test that is reported when performed and documented.
`87522`	Infectious agent antigen detection by nucleic acid (HCV RNA), amplified probe technique	Performed after a positive HCV antibody to confirm active infection; often part of the follow-up workflow when antibody results are missing or positive.
`99000`	Handling and/or conveyance of specimen for transfer from physician to lab	Used when specimen handling or transfer issues contribute to missing documentation of results.
`99070`	Materials and supplies ordered and furnished which are not usually included with the office visit	May apply when special supplies or point-of-care tests were used and documentation is required.

OpenPayer