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    v1.0.31
    OpenPayerBilling CodesDrugs Administered Other than Oral MethodHCPCS hcpcs-j1320-amitriptyline-injection-up-to-20-mg
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    HCPCS Level II J1320: Injection, amitriptyline HCl, up to 20 mg

    HCPCS Level II code J1320 describes the medication administration item for an injection of amitriptyline hydrochloride up to 20 mg, used when amitriptyline is provided as a billable injectable drug; the service type is medication administration and the typical site of service is outpatient clinic or physician office where injectable medications are administered.

    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 55-year-old patient with chronic neuropathic pain refractory to oral therapies presents to an outpatient pain management clinic for targeted intramuscular/infiltration therapy. The clinician orders an injectable amitriptyline formulation J1320 (Injection, amitriptyline HCl, up to 20 mg) to be administered as a single in-office dose into a localized region (for example, paraspinal or peripheral nerve trigger point) during a scheduled procedure visit. The workflow includes pre-procedure consent and pain assessment, medication preparation by nursing in the clinic medication room, verification of correct dose and patient identity, administration by a qualified provider (physician or advanced practice clinician) with appropriate monitoring for adverse effects (vital signs and observation for anticholinergic or cardiac effects), documentation of medication lot and amount, and post-procedure instructions. Billing captures the J1320 HCPCS Level II code for the drug supplied, and may include an appropriate evaluation and management or procedure CPT code if a separate billable service is provided during the same encounter. Typical sites of service include an outpatient pain clinic, ambulatory surgical center, or office-based procedure suite. Common patient scenarios include localized neuropathic pain, myofascial pain referral, or refractory neuralgias where local injectable tricyclic therapy is trialed after systemic routes have been insufficient or intolerable.

    Related CPT Codes

    CPT CodeDescriptionRelationship to This Procedure
    99213Office or other outpatient visit for the evaluation and management of an established patient, typically 15 minutesCommonly billed for pre-injection evaluation and management when the visit meets E/M criteria separate from the drug supply.
    20552Injection(s); single or multiple trigger point(s), 1 or 2 muscle(s)May be performed when J1320 is used for trigger point injections as part of a pain procedure.
    64633Destruction by neurolytic agent; other peripheral nerve (e.g., alcohol, phenol)Sometimes listed as a related advanced pain procedure in clinics that also perform neurolytic injections; used when more invasive nerve-targeted therapy is required.
    96372Therapeutic, prophylactic, or diagnostic injection (specify substance or drug); subcutaneous or intramuscularUsed for reporting administration of an injectable medication in the office if payer requires a separate administration code alongside the drug HCPCS.
    99070Supplies and materials (except spectacles), provided by physician over and above those usually included with the office visit or procedureUsed to bill for non-routine supplies associated with the injection when payer allows separate supply charges.

    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…
    54Modifier ‑54 (“Surgical care only”) is appended to a CPT surgical procedure when the reporting surgeon performs the intraoperative (surgical) component but does not furnish the preoperative and/or…- Use modifier -54 when the reporting surgeon provided only the intraoperative (surgical) component of a procedure and preoperative and/or postoperative management has been or will be provided by…
    55Modifier –55 indicates the billing provider furnished only postoperative management for a procedure that has a global surgical period. According to AAPC, this modifier is appended to the same CPT…- Use modifier -55 when billing the same CPT surgical code that has a 10- or 90-day global period and you, as a provider other than the original surgeon, furnished ONLY postoperative management (no…
    56Modifier ‑56 indicates the reporting provider furnished only the preoperative management for a surgical procedure and did not perform the intraoperative or postoperative care. It is used in…- Use Modifier -56 when a provider performs only the preoperative management in a split‑care situation (one physician manages preop care while a different physician performs the intraoperative…
    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…

    Related Provider Taxonomies

    8 rows

    Taxonomy Code
    2084P0800X
    207R00000X
    363LA2200X
    364S00000X
    364SP0813X
    246XC2903X
    283XC2000X
    2255R0406X

    Related ICD-10-CM Codes

    20 rows

    ICD-10-CM CodeDescription
    F32.9Major depressive disorder, single episode, unspecified
    F33.9Major depressive disorder, recurrent, unspecified
    F41.9Anxiety disorder, unspecified
    F43.10Post-traumatic stress disorder, unspecified
    F45.41Pain disorder exclusively related to psychological factors
    G25.9Extrapyramidal and movement disorder, unspecified
    G43.019Migraine without aura, intractable, without status migrainosus
    G43.909Migraine, unspecified, not intractable, without status migrainosus
    G44.1Vascular headache, not elsewhere classified
    G44.209Tension-type headache, unspecified, not intractable

    Showing 1–10 of 20

    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
    Hematology - AphexdaCigna2026-11-15
    VonvendiCigna2026-11-15
    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

    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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