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    v1.0.28
    OpenPayerBilling CodesChondropathiesICD-10-CM m91-juvenile-osteochondrosis-hip-pelvis
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    ICD-10-CM Code For Juvenile Osteochondrosis Of Hip And Pelvis: Group Overview

    The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group M91 includes juvenile osteochondrosis disorders of the hip and pelvis, such as epiphyseal and apophyseal growth disturbances that affect the developing femoral head and pelvic ossification centers. These ICD-10-CM diagnosis codes are used to document presentations such as pain, limp, restricted range of motion, and radiographic changes reflecting severity, laterality, and stage of the disease. Accurate coding within the ICD-10-CM M91 group supports proper claim adjudication, complete clinical documentation, and appropriate reimbursement.

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    ICD-10-CM M91: Juvenile Osteochondrosis Of Hip And Pelvis Overview

    The diagnoses in this group represent juvenile osteochondrosis conditions affecting the hip and pelvic skeleton, including disorders of the developing cartilage and bone in children and adolescents. These conditions target the musculoskeletal system, particularly the proximal femur, acetabulum, and surrounding growth areas. Accurate coding matters for appropriate clinical documentation and for supporting correct reimbursement and claim adjudication.

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    When to Use

    Use a code from this group when documenting a diagnosis of juvenile osteochondrosis or related growth disturbances of the hip or pelvic bones in pediatric patients. Codes within the group are selected to reflect the specific site, laterality, and clinical stage as documented in the medical record.

    ICD-10-CM Codes

    19 rows

    ICD-10-CM CodeDescription
    M91.0Juvenile osteochondrosis of pelvis
    M91.10Juvenile osteochondrosis of head of femur [Legg-Calve-Perthes], unspecified leg
    M91.11Juvenile osteochondrosis of head of femur [Legg-Calve-Perthes], right leg
    M91.12Juvenile osteochondrosis of head of femur [Legg-Calve-Perthes], left leg
    M91.20Coxa plana, unspecified hip
    M91.21Coxa plana, right hip
    M91.22Coxa plana, left hip
    M91.30Pseudocoxalgia, unspecified hip
    M91.31Pseudocoxalgia, right hip
    M91.32Pseudocoxalgia, left hip
    M91.40Coxa magna, unspecified hip
    M91.41Coxa magna, right hip
    M91.42Coxa magna, left hip
    M91.80Other juvenile osteochondrosis of hip and pelvis, unspecified leg
    M91.81Other juvenile osteochondrosis of hip and pelvis, right leg
    M91.82Other juvenile osteochondrosis of hip and pelvis, left leg
    M91.90Juvenile osteochondrosis of hip and pelvis, unspecified, unspecified leg
    M91.91Juvenile osteochondrosis of hip and pelvis, unspecified, right leg
    M91.92Juvenile osteochondrosis of hip and pelvis, unspecified, left leg

    DRG Codes

    2 rows

    DRG CodeDescription
    553Bone Diseases and Arthropathies with MCC
    554Bone Diseases and Arthropathies without MCC

    Typical Clinical Scenarios

    • A 12-year-old boy presents to orthopedics with several months of progressively worsening, activity-related groin pain and a limp; physical exam shows limited internal rotation of the hip and imaging (AP pelvis and frog-leg lateral) demonstrates flattening and fragmentation of the femoral head consistent with early Perthes disease. The visit is for evaluation and management of a chronic pediatric osteochondrosis affecting the femoral epiphysis, so a diagnosis from this group is assigned to specify the site and laterality. Typical codes: M91.10, M91.11, M91.12

    • A teenage athlete arrives at urgent care after an acute onset of severe hip pain and inability to bear weight following low-energy trauma; radiographs reveal collapse and advanced deformity of the femoral head with evidence of osteonecrosis in the growth center, and the patient requires urgent orthopedic referral for pain control and surgical planning. Because this is an acute exacerbation/advanced stage of juvenile osteochondrosis of the hip epiphysis, a code indicating an acute or unspecific presentation from the group is used. Typical codes: M91.20, M91.21, M91.22

    • An adolescent with a history of chronic hip chondropathy presents for preoperative assessment before corrective pelvic osteotomy due to persistent acetabular dysplasia and femoroacetabular impingement from irregular growth of the acetabular cartilage; clinical notes document long-standing deformity of the pelvic epiphysis and prior conservative treatment. A code from this group is assigned to document the chronic osteochondrosis of the pelvis as a comorbid structural condition influencing surgical planning. Typical codes: M91.30, M91.31, M91.32

    Related Codes

    M92-OTHER-JUVENILE-OSTEOCHONDROSIS

    ICD-10-CM Code For Other Juvenile Osteochondrosis: Group Overview

    M93-OTHER-OSTEOCHONDROPATHIES

    ICD-10-CM Code For Other Osteochondropathies: Group Overview

    M94-OTHER-DISORDERS-OF-CARTILAGE

    ICD-10-CM Code For Other Disorders Of Cartilage: 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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