Hip ICD-10 codes

Primary (idiopathic) osteoarthritis affecting one hip, with the specific side not documented or not determinable from the clinical record.

Primary degenerative joint disease confined to the right hip, with no traumatic, dysplastic, or other secondary etiology documented.

Primary osteoarthritis of the left hip only, with no traumatic, dysplastic, or secondary cause identified — the degenerative process is idiopathic and confined to a single joint.

Osteoarthritis of one hip caused by hip dysplasia, where the specific side (right or left) has not been documented in the medical record.

M16.31 identifies unilateral osteoarthritis of the right hip that developed as a direct consequence of hip dysplasia — distinct from primary or post-traumatic OA — and is fully billable for FY2026.

Osteoarthritis of the left hip that developed as a direct consequence of underlying hip dysplasia, reported as a unilateral finding affecting only the left side.

Post-traumatic osteoarthritis affecting one hip joint, where the specific side (right or left) has not been documented or specified.

Degenerative joint disease of the right hip that developed as a direct consequence of a prior traumatic injury to that joint, coded as a unilateral condition with confirmed right-side laterality.

Post-traumatic osteoarthritis of the left hip occurring unilaterally, where documented prior trauma — fracture, dislocation, or significant soft-tissue injury — is the established cause of joint degeneration.

Inflammation of the trochanteric bursa overlying the greater trochanter of the femur, coded when the affected hip side is not specified in the clinical documentation.

Inflammation of the trochanteric bursa overlying the greater trochanter of the right hip, classified under soft tissue disorders related to use, overuse, and pressure.

Inflammation of the trochanteric bursa overlying the greater trochanter of the left hip, causing lateral hip pain and localized tenderness.

Hip bursitis classified as 'other' (not trochanteric) with laterality undocumented or unspecified — covers ischial bursitis and similar non-trochanteric hip bursa inflammations when the affected side is not recorded.

M70.71 identifies non-trochanteric bursitis of the right hip — covering iliopsoas bursitis, ischiogluteal bursitis, and other hip bursa inflammation that is not classified as trochanteric (M70.61).

Left hip bursitis not classifiable as trochanteric bursitis — includes ischial bursitis of the left hip and other non-trochanteric bursal inflammations at the left hip joint.

Inflammation of the gluteal tendon at its enthesis (bone-to-tendon attachment) at the hip, coded when the treating clinician has not specified whether the right or left hip is involved.

Inflammation of the gluteal tendon at its attachment on the right hip, classified as a lower-limb enthesopathy under ICD-10-CM Chapter 13.

Tendinous inflammation affecting the gluteal muscle insertion at the left hip, classified as an enthesopathy of the lower limb excluding foot.

Inflammation of the psoas tendon at the hip without documented laterality — use only when the treating clinician has not specified right or left side.

Inflammatory condition of the psoas tendon at its attachment or along its course at the right hip, classified as a lower-limb enthesopathy.

Inflammation of the psoas tendon at its attachment or along its course at the left hip, classified as a lower-limb enthesopathy under ICD-10-CM Chapter 13.

M76.20 identifies a bony spur formation at the iliac crest with laterality not documented or not specified — classified as an enthesopathy of the lower limb under the M76 category.

A bone spur (osteophyte) arising from the right iliac crest, classified as a lower-limb enthesopathy under the M76 category for soft tissue disorders of the hip region.

M76.22 identifies an osseous spur formation along the superior rim of the left iliac crest at the tendon or fascia attachment site, classified as a lower-limb enthesopathy.

Legg-Calvé-Perthes disease of the femoral head in a skeletally immature patient where the operative or clinical note does not specify right or left side.

Legg-Calvé-Perthes disease affecting the right hip: avascular necrosis of the right capital femoral epiphysis in a skeletally immature patient, classified under juvenile osteochondroses of the hip and pelvis.

Legg-Calvé-Perthes disease affecting the left femoral head in a pediatric patient, characterized by avascular necrosis and subsequent reossification of the left capital femoral epiphysis.

M91.20 classifies coxa plana of an unspecified hip — a flattening deformity of the femoral head resulting from prior juvenile osteochondrosis (Legg-Calvé-Perthes disease), where the affected side is not documented.

Coxa plana of the right hip — a femoral head deformity resulting from avascular necrosis and remodeling after juvenile osteochondrosis (Legg-Calvé-Perthes disease), leaving a flattened, misshapen femoral head on the right side.

M91.22 identifies coxa plana of the left hip — a flattening deformity of the femoral head resulting from previous juvenile osteochondrosis (Legg-Calvé-Perthes disease) of the left hip.

M91.30 identifies pseudocoxalgia affecting an unspecified hip — a sequela of juvenile osteochondrosis (Legg-Calvé-Perthes disease) in which avascular necrosis of the femoral head produces hip pain and deformity that mimics coxalgia without a primary joint disease cause.

M91.31 identifies pseudocoxalgia affecting the right hip — a juvenile osteochondrosis condition grouped under M91.3, distinct from Legg-Calvé-Perthes disease and coxa plana despite overlapping clinical presentation in skeletally immature patients.

Juvenile osteochondrosis of the left hip presenting as pseudocoxalgia — a condition in which avascular necrosis or osteochondrotic changes produce hip pain and a limp mimicking true hip joint disease, classified under the M91 chondropathy group.

M91.40 identifies coxa magna of an unspecified hip — pathological enlargement of the femoral head and neck occurring as a sequela of juvenile osteochondrosis of the hip and pelvis, where laterality has not been documented.

M91.41 identifies coxa magna of the right hip — an abnormal enlargement of the femoral head and neck occurring as a sequela of juvenile osteochondrosis (typically Legg-Calvé-Perthes disease) of the right side.

Enlargement of the left femoral head and neck as a sequela of juvenile osteochondrosis of the hip, classified under the chondropathies block of ICD-10-CM Chapter 13.

Juvenile osteochondrosis affecting the hip or pelvis region that does not fit a more specific named subtype (such as Legg-Calvé-Perthes, coxa plana, pseudocoxalgia, or coxa magna), coded here when the affected leg is not documented.

M91.81 identifies juvenile osteochondrosis of the hip and pelvis affecting the right leg, in a category that captures osteochondrosis presentations not classified under Legg-Calvé-Perthes disease, coxa plana, pseudocoxalgia, or coxa magna.

M91.82 identifies juvenile osteochondrosis of the hip and pelvis — left side — that does not fall under a more specific named condition such as Legg-Calvé-Perthes disease or pseudocoxalgia.

M91.90 identifies juvenile osteochondrosis of the hip and pelvis when neither the specific subtype nor the affected leg is documented. Both the type of juvenile osteochondrosis and laterality are unspecified.

Juvenile osteochondrosis affecting the hip and/or pelvis on the right side, where the specific subtype (e.g., Legg-Calvé-Perthes, coxa plana, pseudocoxalgia) has not been documented or cannot be determined.

M91.92 identifies juvenile osteochondrosis affecting the hip and pelvis on the left side, where the specific subtype of osteochondrosis has not been documented or cannot be determined from the clinical record.

Pelvic fracture occurring as a direct complication of orthopedic implant insertion, joint prosthesis placement, or bone plate fixation — classified as an intraoperative or postprocedural musculoskeletal complication.

M99.05 identifies segmental and somatic dysfunction localized to the pelvic region — a biomechanical classification capturing restricted or altered motion, tenderness, and tissue texture changes in pelvic structures that cannot be classified under a more specific diagnosis.

Narrowing of the neural canal in the pelvic region caused by subluxation — a biomechanical displacement of adjacent structures that mechanically compromises the canal space.

Osseous stenosis of the neural canal in the pelvic region caused by bony overgrowth or structural changes that narrow the canal and compress neural structures.

M99.85 captures biomechanical lesions of the pelvic region — including the hip and pubic area — that do not fit a more specific M99 subcategory such as segmental and somatic dysfunction (M99.05) or intervertebral disc stenosis (M99.75).

Idiopathic degenerative joint disease affecting both hips simultaneously, classified as primary (not caused by trauma, dysplasia, or other underlying condition).

Bilateral osteoarthritis of both hips caused by underlying developmental hip dysplasia, where abnormal socket coverage accelerates cartilage breakdown and leads to secondary degenerative joint disease.

Post-traumatic osteoarthritis affecting both hip joints simultaneously, arising as a direct consequence of prior trauma to each hip rather than from primary degeneration or dysplasia.

M16.6 classifies bilateral hip osteoarthritis that is secondary in origin but does not arise from hip dysplasia or prior trauma — the two secondary causes assigned their own dedicated codes (M16.2 and M16.4).

Unilateral hip osteoarthritis that developed secondary to a cause other than trauma or dysplasia — such as metabolic disease, inflammatory arthritis, or avascular necrosis — affecting one hip only.

M16.9 is the catch-all billable code for hip osteoarthritis when the clinical record does not specify laterality, etiology (primary, post-traumatic, dysplastic, or other secondary), or bilaterality — use it only when none of those details can be established from the documentation.

M24.7 identifies protrusio acetabuli, a structural deformity in which the acetabular floor is abnormally deep, causing the femoral head to migrate medially into or through the medial wall of the pelvis.

M91.0 classifies juvenile osteochondrosis affecting the pelvic bones, including osteochondrosis of the acetabulum, iliac crest (Buchanan), ischiopubic synchondrosis (van Neck), and symphysis pubis (Pierson).

M95.5 identifies a structural deformity of the pelvis that developed after birth — not a congenital anomaly — including changes to the ilium, ischium, or overall pelvic architecture resulting from disease, injury, or mechanical stress.