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    v1.0.28
    OpenPayerBilling CodesDisorders of musclesICD-10-CM m61-calcification-and-ossification-of-muscle
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    ICD-10-CM Code For Calcification And Ossification Of Muscle: Group Overview

    The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group M61 includes diagnoses for pathological calcification and heterotopic ossification of skeletal muscle, such as myositis ossificans and dystrophic muscle calcification. These ICD-10-CM diagnosis codes are used to document clinical scenarios involving abnormal mineral deposition or bone formation within muscle tissue, capturing severity, anatomical site, and any functional impact. Accurate coding within the ICD-10-CM M61 group supports proper claim adjudication, complete clinical documentation, and appropriate reimbursement.

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    ICD-10-CM M61: Calcification And Ossification Of Muscle Overview

    The diagnoses in this group describe pathological calcification or ossification within skeletal muscle tissue, including conditions such as myositis ossificans and dystrophic calcification of muscle. These disorders affect the musculoskeletal system and can impair mobility and function. Accurate coding matters for proper reimbursement because it captures the specific nature and extent of muscle involvement, which impacts claim adjudication and clinical record completeness.

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    When to Use

    Use a code from this group when clinical documentation indicates calcification or ossification involving muscle tissue confirmed by imaging, surgical findings, or clinical assessment. Select the code that reflects the specific muscle group affected and any specified complications or causes documented in the medical record.

    ICD-10-CM Codes

    154 rows

    ICD-10-CM CodeDescription
    M61.00Myositis ossificans traumatica, unspecified site
    M61.011Myositis ossificans traumatica, right shoulder
    M61.012Myositis ossificans traumatica, left shoulder
    M61.019Myositis ossificans traumatica, unspecified shoulder
    M61.021Myositis ossificans traumatica, right upper arm
    M61.022Myositis ossificans traumatica, left upper arm
    M61.029Myositis ossificans traumatica, unspecified upper arm
    M61.031Myositis ossificans traumatica, right forearm
    M61.032Myositis ossificans traumatica, left forearm
    M61.039Myositis ossificans traumatica, unspecified forearm
    M61.041Myositis ossificans traumatica, right hand
    M61.042Myositis ossificans traumatica, left hand
    M61.049Myositis ossificans traumatica, unspecified hand
    M61.051Myositis ossificans traumatica, right thigh
    M61.052Myositis ossificans traumatica, left thigh
    M61.059Myositis ossificans traumatica, unspecified thigh
    M61.061Myositis ossificans traumatica, right lower leg
    M61.062Myositis ossificans traumatica, left lower leg
    M61.069Myositis ossificans traumatica, unspecified lower leg
    M61.071Myositis ossificans traumatica, right ankle and foot

    Showing 1–20 of 154

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    DRG Codes

    2 rows

    DRG CodeDescription
    557Tendonitis, Myositis and Bursitis with MCC
    558Tendonitis, Myositis and Bursitis without MCC

    Typical Clinical Scenarios

    • A middle-aged athlete presents to the emergency department with acute severe pain and visible swelling of the anterior thigh after a forceful quadriceps strain during a soccer match. Imaging (radiograph and CT) demonstrates focal calcification within the rectus femoris muscle consistent with traumatic myositis ossificans at the site of prior muscle injury; the diagnosis from this group is assigned to capture muscle ossification following trauma. Typical codes: M61.161, M61.162
    • An elderly patient with long‑standing inflammatory myopathy develops progressive stiffness and palpable hard masses within multiple shoulder and hip muscles over months, causing limited range of motion and chronic pain; outpatient MRI and radiographs show diffuse dystrophic calcification/ossification of affected muscles. This chronic, non‑traumatic muscle calcification related to a systemic muscle disorder is coded from this group to reflect ongoing ossification of muscle tissue. Typical codes: M61.31, M61.32
    • A patient who had total hip arthroplasty three months ago returns with worsening hip stiffness and reduced prosthesis mobility; imaging reveals heterotopic ossification within peri‑prosthetic hip musculature causing mechanical limitation and pain, and the ossification is documented as a postoperative complication requiring consideration in management. A code from this group is assigned to identify ossification of muscle as a comorbidity/complication affecting recovery after surgery. Typical codes: M61.271, M61.272

    Related Codes

    M60-MYOSITIS

    ICD-10-CM Code For Myositis: Group Overview

    M62-OTHER-DISORDERS-OF-MUSCLE

    ICD-10-CM Code For Other Disorders Of Muscle: Group Overview

    M63-DISORDERS-OF-MUSCLE

    ICD-10-CM Code For Disorders Of Muscle In Diseases Classified Elsewhere: Group Overview

    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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