CPT 83012: Haptoglobin Phenotype Determination

CPT code 83012 describes a laboratory procedure that identifies a patient’s haptoglobin phenotype (Hp 1–1, Hp 2–1, or Hp 2–2) based on molecular weight patterns. This phenotyping test assists clinicians and laboratories in characterizing haptoglobin variants, which can be relevant for hemolytic disorders, research contexts, and certain diagnostic workflows. Nationally, accurate lab phenotyping supports consistent reporting, clinical interpretation, and downstream care decisions.

Key payers in this overview include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise clinical context for the test, typical sites of service, and the service type. The publication outlines benchmark and policy considerations where available, clarifies common billing modifiers associated with laboratory services, and summarizes where data are not available in the input.

The article provides practical reference material for billing staff, laboratory managers, and policy analysts seeking a national perspective on CPT code 83012, including coding clarity, typical use cases, and items marked as "Data not available in the input" when source details were not provided.

Billing Code Overview

CPT code 83012 identifies a laboratory test that determines which of the three common haptoglobin phenotypes is present in a patient specimen. The phenotypes reported are Hp 1–1, Hp 2–1, and Hp 2–2, each distinguished by unique molecular weight patterns on laboratory analysis.

Service type: Laboratory / Clinical Pathology

Typical site of service: Clinical laboratory or hospital / outpatient laboratory

Clinical Context

A 45-year-old adult presents to the clinical laboratory after routine phlebotomy ordered by the hematology service for evaluation of hemolytic anemia. The clinician suspects intravascular hemolysis and orders haptoglobin phenotype testing to characterize the patient's haptoglobin type (Hp 1–1, Hp 2–1, or Hp 2–2) as part of diagnostic workup and research into disease susceptibility or transfusion planning. The patient’s blood specimen is collected in the outpatient phlebotomy area or inpatient ward and transported to the hospital clinical chemistry or immunology laboratory. The laboratory analyst performs electrophoretic or immunoassay-based methods to determine the haptoglobin phenotype, documents results in the laboratory information system, and issues a report to the ordering provider. Typical sites of service include hospital clinical laboratories, independent reference laboratories, and academic medical center laboratories. Turnaround time is usually same-day to a few days depending on laboratory workflow and confirmatory testing requirements.

Coding Specifications

Modifier	Description	When to Use
`26`	Professional component	Use when billing only the professional interpretation component if the test has split billing.
`TC`

Taxonomy Code	Specialty	Notes
`207R00000X`	Pathology	Clinical laboratory interpretation and oversight of hematology and protein phenotyping.
`207L00000X`	Clinical Laboratory	Laboratory analysts and clinical chemists who perform and validate the assay.
`2080P0003X`	Hematology	Ordering clinicians who manage hemolytic anemia evaluation.
`207K00000X`	Immunology	Specialists involved when immunoassay-based phenotype testing is performed.
`208000000X`	Internal Medicine	Hospitalists and internists who commonly order diagnostic lab testing.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`D59.0`	Drug-induced immune hemolytic anemia	Haptoglobin phenotype may be evaluated during workup of hemolysis to characterize hemolytic processes.
`D59.1`	Other autoimmune hemolytic anemia	Used when immune-mediated hemolysis is suspected; haptoglobin levels/phenotype contribute to interpretation.
`D55.0`	Anemia due to glucose-6-phosphate dehydrogenase deficiency	Hemolytic episodes prompt haptoglobin testing as part of hemolysis evaluation.
`D62`	Acute posthemorrhagic anemia	Haptoglobin phenotype may be obtained when evaluating hemolysis versus blood loss.
`R78.81`	Bacteremia	Hemolysis can accompany severe infections; phenotype testing may be part of broader laboratory assessment.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`83012`	Haptoglobin phenotype determination (Hp 1–1, Hp 2–1, Hp 2–2)	Primary procedure describing identification of the haptoglobin phenotype.
`80053`	Comprehensive metabolic panel	Commonly ordered concurrently to assess organ function in hemolytic patients.
`85025`	Complete CBC with automated differential	Often performed before or alongside phenotype testing to document anemia and hemolysis.
`82040`	Urine bilirubin; clinical chemistry test	May be ordered as part of hemolysis workup alongside haptoglobin testing.
`83050`	Hemoglobin electrophoresis	Performed when hemoglobinopathies are considered alongside haptoglobin phenotype.

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Summary & Overview