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    v1.0.28
    OpenPayerBilling CodesEndoscopy/Arthroscopy Procedures on the Musculoskeletal SystemCPT cpt-29874-arthroscopic-knee-loose-body-removal
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    CPT 29874: Arthroscopic Removal of Loose or Foreign Body, Knee

    Medicare pays $516 on average nationally for this procedure.

    CPT code 29874 describes an arthroscopic knee procedure in which the provider inspects the interior of the knee joint with an arthroscope to locate and remove loose or foreign bodies (for example, fragments of cartilage or debris) that cause pain, inflammation, scar tissue, adhesions, or restricted motion; service type: diagnostic and therapeutic arthroscopy with removal of loose bodies; typical site of service: hospital outpatient department or ambulatory surgery center.

    For related coverage guidance, see recent payer policy updates: Intravenous Anesthetics for the Treatment of Chronic Pain and Psychiatric or Substance Use Disorders, Intravenous Anesthetics for the Treatment of Chronic Pain and Psychiatric or Substance Use Disorders, Intravenous Anesthetics for the Treatment of Chronic Pain and Psychiatric or Substance Use Disorders.

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    Table of contents

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    Clinical & Coding Specifications

    Clinical Context

    A 42-year-old recreational athlete presents with persistent medial knee pain, intermittent swelling, and mechanical catching after a twisting injury eight weeks prior. Conservative care including rest, physical therapy, nonsteroidal anti-inflammatory drugs, and targeted intra-articular corticosteroid injection provided only temporary relief. Clinical exam demonstrates joint line tenderness and a positive McMurray test. MRI of the knee shows an intra-articular loose body adjacent to the medial femoral condyle and small chondral fragment. The orthopedic surgeon schedules an arthroscopic diagnostic and therapeutic procedure.

    The patient arrives to an ambulatory surgical center on the day of surgery. Preoperative consent and timeout are completed. Under regional or general anesthesia, the surgeon performs diagnostic arthroscopy of the knee using an arthroscope, inspects all compartments, identifies loose bodies and fragmented cartilage, and removes loose and foreign bodies with arthroscopic graspers and shaver. Hemostasis is obtained, portals are closed, and the patient is transferred to recovery with routine postoperative instructions and a standard rehabilitation plan focusing on range of motion and gradual return to activity.

    Typical site of service is an outpatient ambulatory surgical center or hospital outpatient department. The service type is a minimally invasive arthroscopic procedure (diagnostic and removal of loose bodies) of the knee.

    Related CPT Codes

    CPT CodeDescriptionRelationship to This Procedure
    29881Knee arthroscopy, with meniscectomy (medial OR lateral, including any meniscal shaving)Performed when a torn meniscus is identified and resected during the same arthroscopic session.
    29880Knee arthroscopy, with meniscal repairPerformed when a repairable meniscal tear is repaired arthroscopically in the same session.
    29877Knee arthroscopy, synovectomy, limitedPerformed when focal synovitis requires arthroscopic debridement in addition to loose body removal.
    29879Knee arthroscopy, abrasion arthroplasty (microfracture)Performed when focal chondral defects are treated with marrow stimulation techniques during the same operative episode.
    29875Knee arthroscopy, with meniscal transplantation (includes allograft)Performed in more complex reconstructive workflows; may be staged or separate from loose body removal.

    Related Modifiers

    10 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…
    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…
    51Modifier –51 (Multiple Procedures) is used when the same provider performs multiple procedures in the same session to identify secondary, non‑exempt procedures and indicate payment reduction logic…- Use modifier -51 when the same provider performs multiple distinct procedures during the same patient encounter: report the highest‑valued procedure first (no modifier) and append -51 to…
    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…
    58Modifier 58 (Staged or related procedure/service by the same physician during the postoperative period) indicates that a subsequent procedure performed by the same provider during the…- Use modifier 58 when the same physician/QHP performs a procedure during the postoperative/global period of an earlier procedure and the subsequent procedure is either planned or anticipated…
    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…
    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…
    79Modifier 79 indicates a surgical procedure performed during the postoperative global period of a prior surgery that is unrelated to the original procedure. Per AMA/CPT and CMS guidance, it is…- Use modifier 79 when the same physician (or same‑specialty physician in the same group) performs a surgical procedure during the postoperative global period of a prior surgery and the new procedure…

    Related Provider Taxonomies

    8 rows

    Taxonomy CodeSpecialtyNotes
    207L00000XAnesthesiology PhysicianAn anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an opera…
    207V00000XObstetrics & Gynecology PhysicianAn obstetrician/gynecologist possesses special knowledge, skills and professional capability in the medical and surgical care of the female reproducti…
    207RM1200XMagnetic Resonance Imaging (MRI) Internal Medicine PhysicianThe NUCC recommends this code not be used. Choose a more appropriate code.<br/>
    282NC2000XChildren's HospitalHospitals · General Acute Care Hospital
    3416L0300XLand AmbulanceTransportation Services · Ambulance
    261QA0005XAmbulatory Family Planning FacilityAn abortion/family planning facility where services are provided at a fixed specific location. An Ambulatory Family Planning Facility does not provid…
    332BC3200XCustomized Equipment (DME)Suppliers · Durable Medical Equipment & Medical Supplies
    347E00000XTransportation BrokerAn organization that provides transportation for individuals who need access to medical care or services and have no other means of transportation. Tr…

    Related ICD-10-CM Codes

    22 rows

    ICD-10-CM CodeDescription
    M17.0Bilateral primary osteoarthritis of knee
    M17.11Unilateral primary osteoarthritis, right knee
    M17.12Unilateral primary osteoarthritis, left knee
    M17.5Other unilateral secondary osteoarthritis of knee
    M17.9Osteoarthritis of knee, unspecified
    M25.261Flail joint, right knee
    M25.262Flail joint, left knee
    M25.269Flail joint, unspecified knee
    M25.561Pain in right knee
    M25.562Pain in left knee

    Showing 1–10 of 22

    Related Payer Policy Updates

    Specialty: Anesthesiology1 / 3

    10 rows

    PolicyPayerEffective Date
    Intravenous Anesthetics for the Treatment of Chronic Pain and Psychiatric or Substance Use DisordersPremera Bluecross2026-07-01
    Intravenous Anesthetics for the Treatment of Chronic Pain and Psychiatric or Substance Use DisordersPremera Bluecross2026-07-01
    Intravenous Anesthetics for the Treatment of Chronic Pain and Psychiatric or Substance Use DisordersPremera Bluecross2026-07-01
    Intravenous Anesthetics for the Treatment of Chronic Pain and Psychiatric or Substance Use DisordersPremera Bluecross2026-07-01
    Elective Inpatient Services (for Idaho Only)UnitedHealthcare2026-06-01
    Sites of Servicepriority health2026-06-01
    Coverage for Ambulatory Surgery Unit (ASU)/Outpatient Facility and Anesthesia for Dental Servicesuniverahealthcare2026-05-21
    Mm_0579_Coveragepositioncriteria_Anesthesia_Services_Selected_Nerve_BlocksCigna2026-05-15
    Intravenous Anesthetics for the Treatment of Chronic Pain and Psychiatric DisordersBlue Cross Blue Shield - North Carolina2026-04-01
    Intravenous Anesthetics for the Treatment of Chronic Pain and Psychiatric DisordersBlue Cross Blue Shield - North Carolina2026-04-01

    Related Codes

    CPT-29800-TMJ-ARTHROSCOPY-DIAGNOSTIC-BIOPSY

    CPT 29800: Temporomandibular Joint Arthroscopy, Diagnostic

    CPT-29804-TEMPOROMANDIBULAR-JOINT-ARTHROSCOPY-TMJ-REPAIR

    CPT 29804: Temporomandibular Joint Arthroscopy

    CPT-29805-SHOULDER-ARTHROSCOPY-WITH-SYNOVIAL-BIOPSY

    CPT 29805: Diagnostic Shoulder Arthroscopy with Synovial Biopsy

    CPT-29806-ARTHROSCOPIC-SHOULDER-CAPSULE-REPAIR

    CPT 29806: Arthroscopy, Shoulder, Repair of Capsular Tear

    CPT-29807-ARTHROSCOPIC-SLAP-LESION-REPAIR-SHOULDER

    CPT 29807: Arthroscopic Repair of SLAP Lesion in Shoulder

    CPT-29819-ARTHROSCOPIC-SHOULDER-LOOSE-FOREIGN-BODY-REMOVAL

    CPT 29819: Arthroscopic Removal of Loose or Foreign Bodies, Shoulder

    CPT-29820-ARTHROSCOPIC-SHOULDER-SYNOVECTOMY

    CPT 29820: Arthroscopic Synovectomy of Shoulder

    CPT-29821-ARTHROSCOPIC-SHOULDER-SYNOVECTOMY

    CPT 29821: Arthroscopic Complete Synovectomy of Shoulder

    CPT-29822-SHOULDER-ARTHROSCOPY-LIMITED-DEBRIDEMENT

    CPT 29822: Arthroscopy, Shoulder, Limited Debridement

    CPT-29823-ARTHROSCOPIC-SHOULDER-DEBRIDEMENT-EXTENSIVE-TISSUE-EXCISION

    CPT 29823: Arthroscopic Shoulder Extensive Excision/Debridement

    Showing 1–10 of 75

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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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