Summary & Overview
CPT 86931: Thawing Frozen Blood Unit
CPT code 86931 identifies the laboratory task of thawing a unit of frozen blood, a pre-analytical service performed in clinical laboratories and hospital blood banks. This seemingly small operational step is essential to ensure that frozen blood products are rendered safe and suitable for testing, transfusion, or other clinical use, and it has implications for lab workflow, specimen integrity, and downstream clinical decisions. Nationally, consistent coding of specimen handling supports accurate billing, quality reporting, and operational benchmarking across laboratory providers.
Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of the clinical context of thawing frozen blood, typical sites of service, and the role of this code within laboratory service lines. The publication presents benchmark considerations for use of the code, common billing modifiers, and policy context relevant to payers and laboratory administrators.
The report clarifies where CPT code 86931 fits in billing workflows and what operational stakeholders should track when documenting specimen processing events. Data not available in the input is clearly noted where applicable.
Billing Code Overview
CPT code 86931 describes the laboratory procedure in which a lab analyst thaws a unit of frozen blood. This procedure is a pre-analytical specimen handling service required to prepare frozen blood products for testing, transfusion, or other downstream laboratory processes.
Service type: Specimen processing / thawing of frozen blood
Typical site of service: Clinical laboratory or hospital blood bank
Clinical & Coding Specifications
Clinical Context
A typical scenario involves a hospitalized adult patient who requires transfusion of previously frozen red blood cells or cryoprecipitate that were stored frozen for inventory management or rare antigen matching. The transfusion service receives a request from the ordering clinician (e.g., for massive transfusion, sickle cell disease with alloantibodies, or replacement therapy following plasma exchange). The blood bank technologist retrieves the frozen unit from controlled cryogenic storage, documents unit identifiers and compatibility testing, and performs the controlled thawing process in a validated water bath or thawing device to bring the unit to transfusion temperature. After thawing, the unit is inspected for integrity, residual debris, clots, or hemolysis, then appropriately labeled and placed on hold for bedside administration. Clinical workflow steps include: order review by transfusion medicine, pre‑transfusion compatibility checks, controlled thawing (the activity represented by 86931), post‑thaw inspection and release, bedside nursing administration, and transfusion monitoring for adverse reactions. Typical site of service is the hospital blood bank, transfusion service, or central laboratory within an inpatient or emergency setting. Typical patient scenarios include urgent need for matched frozen units for patients with alloantibodies, preparation of frozen rare donor units for scheduled transfusion, or thawing cryoprecipitate for fibrinogen replacement in bleeding patients.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
00 |