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    v1.0.30
    OpenPayerBilling CodesPathology and Laboratory ServicesHCPCS hcpcs-p2033-thymol-turbidity-blood-lab-test
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    HCPCS P2033: Thymol Turbidity, Blood

    HCPCS Level II code P2033 identifies a laboratory test measuring thymol turbidity in blood, a serologic test used to assess certain protein abnormalities and liver function; the service is a clinical pathology laboratory test typically performed in a clinical laboratory or hospital lab setting.

    For related coverage guidance, see recent payer policy updates: Hematology - Adzynma, Tumor Treating Fields for Pancreatic Cancer, Axicabtagene ciloleucel (Yescarta®) coverage.

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    Clinical & Coding Specifications

    Clinical Context

    A 58-year-old outpatient presents for evaluation of chronic liver disease and abnormal routine chemistry results, including jaundice and mild coagulopathy. The clinician orders a serum thymol turbidity test (P2033) as part of an older panel used to assess globulin and liver synthetic function when more specific tests are unavailable or as a historical local laboratory practice. The specimen is collected via standard venipuncture in the outpatient phlebotomy area. The sample is sent to the clinical laboratory; the laboratory technologist performs the thymol turbidity assay manually or with automated turbidimetry to measure serum protein precipitation (turbidity) in an alkaline thymol solution. Results are reported in the electronic health record and interpreted by the ordering provider alongside liver function tests (e.g., bilirubin, albumin, prothrombin time) to support assessment of hepatic synthetic impairment or hypergammaglobulinemia. Typical sites of service include hospital outpatient laboratories, independent clinical laboratories, and ambulatory clinic labs. Common patient scenarios include evaluation for chronic hepatitis, cirrhosis, suspected multiple myeloma or other dysproteinemias, and follow-up of abnormal liver panel findings.

    Related CPT Codes

    CPT CodeDescriptionRelationship to This Procedure
    80053Comprehensive metabolic panel; 14 testsOften ordered alongside thymol turbidity to assess liver and metabolic function in the same clinical evaluation.
    80076Hepatic function panelDirectly related panel that includes tests for bilirubin, albumin, and other markers used with thymol turbidity to evaluate liver synthetic function.
    80061Lipid panelMay be ordered concurrently in outpatient evaluations where baseline bloodwork is collected.
    84156Serum albumin; quantitativeIndividual test commonly performed with thymol turbidity to assess serum protein status and hepatic synthetic function.
    86300Assay of serum or plasma proteins; qualitative or semiquantitativeRelated protein testing procedures that complement the thymol turbidity result in assessing dysproteinemia.

    Related Modifiers

    7 rows

    ModifierDescriptionWhen to Use
    26Modifier 26 (Professional Component) identifies and bills only the professional portion of a split service — the physician’s interpretation, report, and medical judgment — when the technical…- Use CPT Modifier -26 when you are billing only the professional component (PC) of a split‑bill eligible service—i.e., you performed the physician interpretation, medical judgment and prepared a…
    52Modifier ‑52 (Reduced Services) indicates that a service or procedure was partially reduced or omitted at the provider’s discretion, allowing reporting of the basic procedure number with a qualifier…- Use modifier -52 when a physician or qualified health professional electively reduces or omits part of a procedure or service (for example, performing fewer required views or omitting a portion of…
    53Modifier 53 (Discontinued Procedure) signals that a surgical or diagnostic service was begun by the physician but terminated because of extenuating circumstances that threatened the patient’s…- Use modifier -53 when a physician/qualified healthcare professional has started a surgical or diagnostic procedure (e.g., anesthesia administered, incision or scope insertion) and then discontinues…
    59Modifier 59 indicates a distinct procedural service when two procedures that are not normally billed together are clinically and procedurally separate. The CPT definition (as reiterated by CMS)…- Use modifier -59 to report a distinct procedural service when documentation supports that the procedure reported is not normally billed together with another service on the same day because of a…
    78CPT modifier -78 indicates an unplanned, related return to the operating or procedure room by the same provider during the global postoperative period. It is appended when treatment for a…- Use modifier -78 when an unplanned, related complication during the original procedure’s global postoperative period requires the patient to return to a formal operating or procedure room and the…
    22Modifier –22 (Increased Procedural Services) is used when a reported procedure is substantially more extensive than normally required. The CPT Manual and CMS state it may be appended only when the…- When to use: Append modifier -22 to a procedural CPT code when the service performed is substantially more extensive than the usual service described by that code — i.e., the procedure required…
    80CPT® Modifier 80 (Assistant Surgeon) is appended to a surgical CPT code when a physician (MD or DO) provides full, continuous assistance throughout the operative procedure. It is intended only for…- Use CPT Modifier -80 when a physician (MD or DO) serves as an assistant surgeon and provides full, continuous assistance throughout the entire operative procedure; append -80 to the surgical CPT…

    Related Provider Taxonomies

    8 rows

    Taxonomy Code
    207RC0000X
    207RH0000X
    207L00000X
    208000000X
    207K00000X
    246QL0901X
    122400000X
    261QH0100X

    Related Payer Policy Updates

    Specialty: Hematology/Oncology1 / 4

    10 rows

    PolicyPayerEffective Date
    Hematology - AdzynmaCigna2026-10-15
    Tumor Treating Fields for Pancreatic Cancerselect_health2026-10-01
    Axicabtagene ciloleucel (Yescarta®) coverageBaylor Scott & White Health Plan2026-10-01
    Electric Tumor Treatment Field Therapy (for Kentucky Only)UnitedHealthcare2026-10-01
    Electric Tumor Treatment Field Therapy (for Kansas Only)UnitedHealthcare2026-10-01
    Electric Tumor Treatment Field Therapy (for Idaho Only)UnitedHealthcare2026-10-01
    Brexucabtagene autoleucel (Tecartus) CoverageBaylor Scott & White Health Plan2026-10-01
    Electric Tumor Treatment Field Therapy (for Pennsylvania Only)UnitedHealthcare2026-10-01
    Epithelial Cell Cytology in Breast Cancer Risk AssessmentOscar Health2026-10-01
    Factor VIII ProductsCigna2026-09-15

    Related Codes

    HCPCS-LEVEL-II-P2029-CONGO-RED-BLOOD-TEST

    HCPCS P2029: Congo red, blood

    HCPCS-P2028-CEPHALIN-FLOCCULATION-BLOOD

    HCPCS Level II P2028: Cephalin Flocculation, Blood

    HCPCS-P2031-HAIR-ANALYSIS-EXCLUDING-ARSENIC

    HCPCS P2031: Hair Analysis (Excluding Arsenic)

    HCPCS-P2038-MUCOPROTEIN-BLOOD-SEROMUCOID-LAB-TEST

    HCPCS Level II P2038: Mucoprotein (Seromucoid) Blood Test

    HCPCS-P3000-SCREENING-PAP-SMEAR-TECHNICIAN-SUPERVISED

    HCPCS Level II P3000: Screening Papanicolaou Smear by Technician

    HCPCS-P3001-SCREENING-PAP-SMEAR-CERVICAL-VAGINAL

    HCPCS Level II P3001: Screening Papanicolaou Smear, Up to Three Smears

    HCPCS-P7001-QUANTITATIVE-URINE-BACTERIAL-CULTURE-SENSITIVITY

    HCPCS P7001: Urine Bacterial Culture, Quantitative with Sensitivity

    HCPCS-P9010-WHOLE-BLOOD-TRANSFUSION-PER-UNIT

    HCPCS Level II P9010: Blood (whole) for Transfusion, per Unit

    HCPCS-P9011-BLOOD-SPLIT-UNIT

    HCPCS Level II P9011: Blood, Split Unit

    HCPCS-P9012-CRYOPRECIPITATE-EACH-UNIT

    HCPCS Level II P9012: Cryoprecipitate, Each Unit

    Showing 1–10 of 58

    Frequently Asked Questions

    References

    1. 1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
    2. 2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
    3. 3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.
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