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Condition/Disorder Synonyms

  • Hip arthritis

  • Hip degenerative joint disease

ICD-9-CM Codes

  • 715 Osteoarthrosis and allied disorders

  • 715.15 Osteoarthrosis localized primary involving pelvic region and thigh

  • 715.25 Osteoarthrosis localized secondary involving pelvic region and thigh

  • 715.35 Osteoarthrosis localized not specified whether primary or secondary involving pelvic region and thigh

  • 715.9 Osteoarthrosis unspecified whether generalized or localized

  • 715.95 Osteoarthrosis unspecified whether generalized or localized involving pelvic region and thigh

ICD-10-CM Codes

  • M16.10 Unilateral primary osteoarthritis, unspecified hip

  • M16.7 Other unilateral secondary osteoarthritis of hip

  • M16.9 Osteoarthritis of hip, unspecified

Preferred Practice Patterns

Key Features


  • Most common form of arthritis

  • Degenerative

  • Commonly affects hip and knee joints (weight-bearing joints)

  • May also affect spinal facet joints

  • Associated with increased age, obesity, female sex, race/ethnicity

  • Associated with abnormal loading of joints

  • Characterized by joint pain

  • Arthrosis

  • Osteoarthrosis

  • Polyarthrosis

  • Degenerative joint disease

Essentials of Diagnosis

  • Radiography is standard method for diagnosis

  • Kellgren and Lawrence (KL) grade ⩾ 2 (definite radiographic OA)2

  • Osteophytes, joint-space narrowing, sclerosis

  • Cartilage lesions, bone marrow lesions, synovitis, effusion, subchondral bone attrition or sclerosis

  • Erosion of articular cartilage

  • Synovial hyperplasia

  • Fibrosis

  • Inflammatory cell infiltration

  • With or without OA symptoms

  • Conventional radiograph is most commonly used tool for diagnosing OA

  • Diagnosis based on a careful history, physical examination, imaging studies, laboratory examination, exclusion of other possible diseases

General Considerations

  • Low bone-mineral density (BMD)

  • Repetitive joint use or loading

  • Joint alignment

  • Leg-length discrepancy (LLD)

  • Bone or joint morphology

  • Calcification (e.g., of the knee meniscus)

  • Bone formation, cyst formation

  • Thickening of subchondral bone plate, osteosclerosis

  • Overall joint dysfunction

  • Joint swelling and inflammation (in severe cases)

  • Joint pain

  • Morning stiffness

  • Long-term disease

  • Secondary problems

    • Muscle atrophy and weakness

    • Bony protrusion or prominence

    • Joint deformity

    • Difficulty walking

    • Difficulty with ADLs


  • Increased age (middle- to older-age)

  • Women more commonly affected than men

  • African American and Caucasian more commonly affected than other ethnicities

  • May affect approximately 12% of population in U.S. and other developed countries3

Clinical Findings

Signs and Symptoms

  • Joint pain or aching

  • Joint stiffness

  • Muscle weakness

  • Muscle atrophy

  • Crepitus

  • Bony enlargement

  • Limited joint range of motion (ROM)

  • Joint-line tenderness

  • Joint deformity in severe cases

  • Activity limitation

Functional ...

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