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    v1.0.31
    OpenPayerBilling CodesProsthetic ProceduresHCPCS hcpcs-l8658-interphalangeal-joint-spacer-silicone
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    HCPCS L8658: Interphalangeal Joint Spacer, Silicone or Equal

    HCPCS Level II code L8658 describes an interphalangeal joint spacer, silicone or equal, each, used as an implanted or insertion device for reconstruction or stabilization of an interphalangeal joint; service type: implantable joint spacer/device placement, typical site of service: ambulatory surgical center or hospital outpatient/operating room where small joint reconstruction or hand surgery is performed.

    For related coverage guidance, see recent payer policy updates: Speech Therapy for Autism Disorders - Medical Policy, Physical Performance Test or Measurement, Sensory Integration Therapy and Auditory Integration Training.

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    Clinical & Coding Specifications

    Clinical Context

    A middle-aged patient presents with pain, stiffness, and deformity of an interphalangeal joint of a finger following advanced osteoarthritis or post-traumatic joint collapse. Nonoperative measures (splinting, NSAIDs, corticosteroid injection) have failed to provide durable relief. The hand surgeon evaluates the patient in clinic, obtains radiographs showing joint space narrowing and subchondral changes, and discusses surgical options. During the operative encounter in an ambulatory surgical center or hospital outpatient department under regional or local anesthesia with sedation, the surgeon performs a limited excision and places an interphalangeal joint spacer (L8658) made of silicone to maintain joint alignment, preserve motion, and relieve pain. The device is billed as L8658 per spacer. Typical workflow includes preoperative evaluation, intraoperative placement of the silicone spacer, postoperative dressing and splinting, and short-term follow-up visits for wound check and rehabilitation with occupational therapy as needed.

    Related CPT Codes

    CPT CodeDescriptionRelationship to This Procedure
    20670Joint aspiration, with or without injection; small joint (e.g., fingers)Performed preoperatively for therapeutic relief or to assess effusion and rule out infection prior to spacer placement.
    25320Arthroplasty, interphalangeal (IP) joint, simple; without prosthesis (includes excision of osteophytes and bone graft if performed)Related reconstructive procedure; spacer placement is an alternative to or performed in conjunction with arthroplasty techniques.
    25330Arthroplasty, interphalangeal (IP) joint, complex; with prosthetic implantWhen a formal prosthetic implant (not a silicone spacer billed as L8658) is used; relevant for surgical planning and differentiation.
    20680Arthrocentesis, aspiration and/or injection; large joint (e.g., shoulder) — listed for contrast of coding; small-joint code 20670 is more applicableHelps delineate appropriate small-joint service coding when preoperative injections are performed.
    29515Application of short-arm splint (forearm to hand); initial applicationFrequently used postoperatively to immobilize the digit after spacer insertion.

    Related Modifiers

    9 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…
    50Modifier –50 (Bilateral Procedure) is appended to a CPT code when an identical procedure is performed on paired anatomical structures during the same operative session. The AMA states to add…- Use modifier -50 when the same CPT surgical, diagnostic, or radiology procedure is performed on paired anatomical structures (both sides of the body) during the same operative/session by the same…
    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…
    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…

    Related Provider Taxonomies

    8 rows

    Taxonomy Code
    207X00000X
    208000000X
    364S00000X
    225600000X
    167G00000X
    247200000X
    2081P0004X
    2084E0001X

    Related ICD-10-CM Codes

    25 rows

    ICD-10-CM CodeDescription
    A18.81Tuberculosis of thyroid gland
    B35.3Tinea pedis
    E03.9Hypothyroidism, unspecified
    E11.40Type 2 diabetes mellitus with diabetic neuropathy, unspecified
    G60.9Hereditary and idiopathic neuropathy, unspecified
    L92.0Granuloma annulare
    M05.871Other rheumatoid arthritis with rheumatoid factor of right ankle and foot
    M06.072Rheumatoid arthritis without rheumatoid factor, left ankle and foot
    M06.871Other specified rheumatoid arthritis, right ankle and foot
    M17.0Bilateral primary osteoarthritis of knee

    Showing 1–10 of 25

    Related Payer Policy Updates

    Specialty: Physical Medicine, Rehab & Therapies1 / 2

    10 rows

    PolicyPayerEffective Date
    Speech Therapy for Autism Disorders - Medical PolicyHealth-New-England2026-12-01
    Physical Performance Test or MeasurementCigna2026-11-15
    Sensory Integration Therapy and Auditory Integration TrainingColorado Rocky Mountain Health Plans2026-11-01
    Skilled Nursing and Skilled Rehabilitation Services (Outpatient)Anthem2026-10-01
    Habilitation and Rehabilitation Therapy (Occupational, Physical, and Speech) (for New Mexico Only)UnitedHealthcare2026-10-01
    Physical Therapy/Medicine Corporate Medical Policybcbsvermont2026-10-01
    Cognitive Rehabilitation Corporate Medical Policybcbsvermont2026-10-01
    Speech Language Pathology/Therapy Services Corporate Medical Policybcbsvermont2026-10-01
    Occupational Therapy Corporate Medical Policybcbsvermont2026-10-01
    Biomagnetic TherapyConnectiCare2026-09-11

    Related Codes

    HCPCS-L5000-PARTIAL-FOOT-SHOE-INSERT-LONGITUDINAL-ARCH-TOE-FILLER

    HCPCS Level II L5000: Partial Foot Shoe Insert with Longitudinal Arch, Toe Filler

    HCPCS-L5010-PARTIAL-FOOT-MOLDED-SOCKET-ANKLE-HEIGHT-TOE-FILLER

    HCPCS L5010: Partial Foot Molded Socket, Ankle Height, With Toe Filler

    HCPCS-L5020-PARTIAL-FOOT-MOLDED-SOCKET-TIBIAL-TUBERCLE-TOE-FILLER

    HCPCS L5020: Partial Foot Molded Socket with Toe Filler

    HCPCS-L5050-ANKLE-SYMES-MOLDED-SOCKET-SACH-FOOT

    HCPCS L5050: Ankle/Symes Molded Socket with SACH Foot

    HCPCS-L5060-ANKLE-SYMES-METAL-FRAME-MOLDED-LEATHER-SOCKET-ARTICULATED-ANKLE-FOOT

    HCPCS L5060: Ankle/Symes Metal Frame with Molded Leather Socket

    HCPCS-L5100-BELOW-KNEE-MOLDED-SOCKET-SHIN-SACH-FOOT

    HCPCS Level II L5100: Below-Knee Molded Socket with Shin and SACH Foot

    HCPCS-L5105-BELOW-KNEE-PLASTIC-SOCKET-SACH-FOOT

    HCPCS L5105: Below-Knee Plastic Socket Prosthesis with SACH Foot

    HCPCS-L5150-KNEE-DISARTICULATION-MOLDED-SOCKET-EXTERNAL-KNEE-SACH-FOOT

    HCPCS L5150: Knee Disarticulation Molded Socket with External Knee and SACH Foot

    HCPCS-L5160-KNEE-DISARTICULATION-MOLDED-SOCKET-BENT-KNEE-SACH-FOOT

    HCPCS Level II L5160: Knee Disarticulation Molded Socket, Bent Knee Configuration

    HCPCS-L5200-ABOVE-KNEE-MOLDED-SOCKET-SINGLE-AXIS-KNEE-SACH-FOOT

    HCPCS Level II L5200: Above-knee Prosthesis with Molded Socket and Single-axis Knee

    Showing 1–10 of 472

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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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