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    v1.0.30
    OpenPayerBilling CodesDrugs Administered Other than Oral MethodHCPCS hcpcs-j1823-inebilizumab-injection-1mg
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    HCPCS J1823: Inebilizumab-cdon Injection, 1 mg

    HCPCS Level II code J1823 describes a billed unit for inebilizumab-cdon injection, with the code representing 1 mg of the monoclonal antibody administered as an infusion or injection; the service is an injectable biologic medication typically provided in outpatient infusion centers or physician office infusion suites for conditions treated with inebilizumab-cdon.

    For related coverage guidance, see recent payer policy updates: T-Cell Lymphoma Agents: Beleodaq, Istodax, Lymphir, Poteligeo, and Romidepsin, Tumor Treatment Fields - Medical Policy, Extracorporeal Photopheresis.

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    Clinical & Coding Specifications

    Clinical Context

    A typical patient is an adult diagnosed with neuromyelitis optica spectrum disorder (NMOSD) or another B-cell–mediated autoimmune condition for which inebilizumab is indicated. The patient presents to an outpatient infusion center or specialty clinic for administration of J1823 (inebilizumab-cdon, 1 mg). Prior to infusion, the clinical workflow includes verification of indication, review of prior authorization and payer coverage (for example, Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, BUCA, Medicare), collection of baseline laboratory studies (CBC with differential, immunoglobulin levels, screening for hepatitis B and tuberculosis as clinically indicated), and assessment for active infection or vaccination status. The first dose is typically given in a monitored infusion setting with vital sign checks before, during, and after infusion; subsequent dosing follows the approved schedule (induction followed by maintenance dosing). Documentation includes the HCPCS code J1823 with appropriate modifier(s), infusion start and stop times, lot number and NDC if required, pre- and post-medication assessments, and any adverse reactions. Post-infusion, the patient is observed per protocol and scheduled for follow-up doses and monitoring visits, including periodic lab tests and neurologic assessments to evaluate therapeutic response and safety.

    Related CPT Codes

    CPT CodeDescriptionRelationship to This Procedure
    96365Intravenous infusion, for therapy, prophylaxis, or diagnosis; initial, up to 1 hourUsed for reporting the initial continuous IV infusion encounter when an infusion is delivered concurrently with J1823 if the payer requires infusion time reporting
    96366Intravenous infusion, each additional hour (List separately in addition to code for primary service)Reported for each additional hour of infusion time beyond the initial hour when infusion duration extends
    96367Infusion administration, additional sequential infusion of a new drug/drug not part of primary infusionUsed if another drug infusion is administered sequentially during the same visit alongside J1823
    96372Therapeutic, prophylactic, or diagnostic injection (specify substance or drug); subcutaneous or intramuscularUsed when ancillary injections (e.g., premedication such as subcutaneous or intramuscular medications) are given during the visit
    36415Collection of venous blood by venipuncturePerformed for pre-infusion and monitoring laboratory draws associated with administration of J1823

    Related Modifiers

    8 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…
    23Modifier -23 (Unusual Anesthesia) is used on anesthesia service CPT codes when a procedure that normally requires no anesthesia or only local anesthesia must be performed under general anesthesia…- Use modifier -23 only on anesthesia CPT codes (00100–01999) when a procedure that normally requires no anesthesia or only local anesthesia must be performed under general anesthesia because of…
    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…
    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…
    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…
    82Modifier 82 is appended to a surgical CPT code to indicate that an attending physician acted as an assistant because a qualified resident surgeon was unavailable. In teaching hospitals it documents…- When to use: Append modifier 82 in teaching-hospital settings to indicate a physician served as an assistant surgeon because a qualified resident surgeon was unavailable (includes situations where…

    Related Provider Taxonomies

    8 rows

    Taxonomy Code
    207RH0000X
    207RI0200X
    208000000X
    282NC2000X
    207WX0109X
    335E00000X
    2081P0010X
    347D00000X

    Related Payer Policy Updates

    Specialty: Hematology/Oncology1 / 3

    10 rows

    PolicyPayerEffective Date
    T-Cell Lymphoma Agents: Beleodaq, Istodax, Lymphir, Poteligeo, and RomidepsinMass General Brigham Health Plan2027-01-04
    Tumor Treatment Fields - Medical PolicyHealth-New-England2026-12-01
    Extracorporeal PhotopheresisCigna2026-11-15
    Electric Tumor Treatment Field Therapy (for Tennessee Only)Colorado Rocky Mountain Health Plans2026-11-01
    Tumor Treating Fields Therapypremerabluecrossofwashington2026-11-01
    Tumor Treating Fields Therapypremerabluecrossofwashington2026-11-01
    OmisirgeCigna2026-11-01
    Hematology - AdzynmaCigna2026-10-15
    Transcatheter Arterial Chemoembolization for Liver Tumorspremerabluecrossofwashington2026-10-01
    Cryoablation of Tumors Located in the Kidney, Lung, Breast, Pancreas, or Bonepremerabluecrossofwashington2026-10-01

    Related Codes

    HCPCS-J0013-ESKETAMINE-NASAL-SPRAY-1MG

    HCPCS Level II J0013: Esketamine Nasal Spray, 1 mg

    HCPCS-J0120-INJECTION-TETRACYCLINE-250MG

    HCPCS Level II J0120: Injection, Tetracycline, up to 250 mg

    HCPCS-J0121-OMADACYCLINE-INJECTION-1MG

    HCPCS Level II J0121: Omadacycline Injection, 1 mg

    HCPCS-J0122-ERAVACYCLINE-INJECTION-1MG

    HCPCS Level II J0122: Injection, eravacycline, 1 mg

    HCPCS-J0129-ABATACEPT-INJECTION-10MG-PHYSICIAN-SUPERVISED

    HCPCS Level II J0129: Abatacept Injection, 10 mg

    HCPCS-J0130-INJECTION-ABCIXIMAB-10MG

    HCPCS Level II J0130: Injection abciximab, 10 mg

    HCPCS-J0131-INJECTION-ACETAMINOPHEN-10MG-PARENTERAL-ANALGESIC

    HCPCS Level II J0131: Injection, Acetaminophen 10 mg

    HCPCS-J0132-INJECTION-ACETYLCYSTEINE-100MG-INJECTABLE-MEDICATION

    HCPCS Level II J0132: Injection, Acetylcysteine 100 mg

    HCPCS-J0133-ACYCLOVIR-INJECTION-5MG

    HCPCS Level II J0133: Injection, Acyclovir 5 mg

    HCPCS-J0134-ACETAMINOPHEN-INJECTION-FRESENIUS-KABI-10MG

    HCPCS Level II J0134: Injection, Acetaminophen (10 mg)

    Showing 1–10 of 991

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    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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