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    v1.0.30
    OpenPayerBilling CodesIn Vivo (eg, Transcutaneous) Laboratory ProceduresCPT cpt-88741-transcutaneous-methemoglobin-measurement
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    CPT 88741: Transcutaneous Quantitative Methemoglobin Measurement

    CPT code 88741 describes a quantitative transcutaneous measurement of methemoglobin, performed by an analyst using a noninvasive, through-the-skin device; the service type is transcutaneous methemoglobin monitoring, typically provided in outpatient clinics, emergency departments, or bedside settings and reported once per day for the measured assessment of methemoglobinemia.

    For related coverage guidance, see recent payer policy updates: Oral Cancer Screening and Testing, RTM Testing for Alpha-1 Antitrypsin Deficiency, Cytochrome P450 Genotype-Guided Treatment Strategy Corporate Medical Policy.

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    Clinical & Coding Specifications

    Clinical Context

    A typical patient is an adult presenting to an emergency department or urgent care with symptoms suggestive of oxidant-induced hemoglobin dysfunction — for example, cyanosis unresponsive to oxygen therapy, chocolate-brown colored blood, shortness of breath, tachycardia, or altered mental status after exposure to topical or systemic oxidizing agents (dapsone, local anesthetics such as benzocaine, nitrites, or smoke inhalation). A clinician orders a quantitative transcutaneous methemoglobin measurement to rapidly assess percent methemoglobin noninvasively.

    Workflow: On presentation, triage identifies hypoxemia not corrected by supplemental oxygen and clinical concern for methemoglobinemia. The clinician documents the indication and orders the test. A trained technologist or analyzer operator places the transcutaneous sensor on the patient’s finger or earlobe and runs the 88741 measurement. The analyzer displays a quantitative percent methemoglobin value and documents the result in the medical record. If elevated, the care team uses the result along with clinical assessment to determine need for antidotal therapy (e.g., methylene blue) and further laboratory confirmation if indicated. The code 88741 is billed once per day for the transcutaneous quantitative methemoglobin procedure.

    Related CPT Codes

    CPT CodeDescriptionRelationship to This Procedure
    94760Noninvasive ear or pulse oximetry for oxygen saturation; single determinationOften performed concurrently to assess oxygen saturation but may be unreliable in methemoglobinemia; provides complementary oxygenation data.
    82962Glucose, quantitative, blood (e.g., glucose monitoring)Frequently ordered in acute presentations to evaluate metabolic contributors; may be part of point-of-care panels performed in the same workflow.
    36415Collection of venous blood by venipunctureMay be performed when a confirmatory arterial or venous blood sample is needed for laboratory co-oximetry following an abnormal transcutaneous 88741 result.
    83655Hemoglobin; quantitation by automated methodPart of the laboratory evaluation when blood samples are drawn to assess anemia or hemoglobin status alongside co-oximetry.
    86140Hemoglobin; oxygen saturation (co-oximetry)Laboratory co-oximetry is the gold standard confirmatory test for methemoglobin levels and is commonly ordered after an abnormal 88741 transcutaneous measurement.

    Related Modifiers

    6 rows

    ModifierDescriptionWhen to Use
    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…
    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…
    62Modifier 62 indicates that two surgeons function as co‑surgeons, each performing distinct parts of the same primary surgical procedure. It is appended to the primary procedure code (and any…- Use modifier -62 when two surgeons act as co‑surgeons (both primary surgeons) on a single definitive primary procedure, each performing distinct parts of the same surgical procedure (append -62 to…
    90Modifier ‑90 (Reference/Outside Laboratory) indicates that a laboratory test was performed by an entity other than the treating or reporting provider. The American Medical Association defines…- Use CPT modifier -90 when a laboratory test is performed by an outside/reference laboratory (an entity other than the treating or reporting physician or qualified professional) and the claim needs…

    Related Provider Taxonomies

    8 rows

    Taxonomy Code
    208D00000X
    207P00000X
    208000000X
    2086S0102X
    207K00000X
    2080P0216X
    226300000X
    207RC0200X

    Related Payer Policy Updates

    Specialty: Genetic & Molecular Testing1 / 2

    10 rows

    PolicyPayerEffective Date
    Oral Cancer Screening and TestingOscar Health2027-01-01
    RTM Testing for Alpha-1 Antitrypsin DeficiencyOscar Health2027-01-01
    Cytochrome P450 Genotype-Guided Treatment Strategy Corporate Medical Policybcbsvermont2027-01-01
    Carrier Testing Panels for Genetic Diseases (for Kentucky Only)UnitedHealthcare2026-10-01
    Genetic Testing for Neurological Disorders (for Kansas Only)UnitedHealthcare2026-10-01
    Genetic and Molecular TestingProvidence Health Plan2026-10-01
    Cell-Free Fetal DNA Testing (for Idaho Only)UnitedHealthcare2026-10-01
    Next Generation Sequencing for Minimal Residual Disease DetectionProvidence Health Plan2026-10-01
    Pharmacogenetic Panel Testing (for Kansas Only)UnitedHealthcare2026-10-01
    Non-Covered Genetic Panel TestsProvidence Health Plan2026-10-01

    Related Codes

    CPT-88720-NONINVASIVE-BILIRUBIN-MEASUREMENT

    CPT 88720: Transcutaneous Bilirubin Measurement

    CPT-88738-TRANSCUTANEOUS-HEMOGLOBIN-MEASUREMENT

    CPT 88738: Transcutaneous Hemoglobin Measurement

    CPT-88740-TRANSCUTANEOUS-CARBOXYHEMOGLOBIN-QUANTITATIVE

    CPT 88740: Transcutaneous Measurement of Carboxyhemoglobin

    CPT-88749-UNLISTED-IN-VIVO-LABORATORY-SERVICE

    CPT 88749: Unlisted In Vivo Laboratory Service

    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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