DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

M91 Juvenile osteochondrosis of hip and pelvis

  • Header · not billable

M91 is not billable. The category heads 19 billable codes in FY2027, grouped under 7 subdivisions.

Index → code

  • Pseudocoxalgia → M91.3-
  • Pierson's disease or osteochondrosis → M91.0
  • Buchanan's disease or osteochondrosis → M91.0

Where it sits

  1. Chapter 13 Diseases of the musculoskeletal system and connective tissue (M00-M99)
  2. M91-M94 Chondropathies (M91-M94)
  3. M91 Juvenile osteochondrosis of hip and pelvis
Billable codes
19
Subdivisions
7
CC / MCC codes
0 / 0
HCC V28 codes
0
New FY2027
0
Index entries
19

Codes in M91

  1. M91.0
    Juvenile osteochondrosis of pelvis
    Billable
    Inclusion terms 4

    Inclusion terms

    • Osteochondrosis (juvenile) of acetabulum
    • Osteochondrosis (juvenile) of iliac crest [Buchanan]
    • Osteochondrosis (juvenile) of ischiopubic synchondrosis [van Neck]
    • Osteochondrosis (juvenile) of symphysis pubis [Pierson]
  2. M91.1
    Juvenile osteochondrosis of head of femur [Legg-Calvé-Perthes]
    Header
  3. M91.10
    Juvenile osteochondrosis of head of femur [Legg-Calvé-Perthes], unspecified leg
    Billable
  4. M91.11
    Juvenile osteochondrosis of head of femur [Legg-Calvé-Perthes], right leg
    Billable
  5. M91.12
    Juvenile osteochondrosis of head of femur [Legg-Calvé-Perthes], left leg
    Billable
  6. M91.2
    Coxa plana
    Header
    Inclusion terms 1

    Inclusion terms

    • Hip deformity due to previous juvenile osteochondrosis
  7. M91.20
    Coxa plana, unspecified hip
    Billable
  8. M91.21
    Coxa plana, right hip
    Billable
  9. M91.22
    Coxa plana, left hip
    Billable
  10. M91.3
    Pseudocoxalgia
    Header
  11. M91.30
    Pseudocoxalgia, unspecified hip
    Billable
  12. M91.31
    Pseudocoxalgia, right hip
    Billable
  13. M91.32
    Pseudocoxalgia, left hip
    Billable
  14. M91.4
    Coxa magna
    Header
  15. M91.40
    Coxa magna, unspecified hip
    Billable
  16. M91.41
    Coxa magna, right hip
    Billable
  17. M91.42
    Coxa magna, left hip
    Billable
  18. M91.8
    Other juvenile osteochondrosis of hip and pelvis
    Header
    Inclusion terms 1

    Inclusion terms

    • Juvenile osteochondrosis after reduction of congenital dislocation of hip
  19. M91.80
    Other juvenile osteochondrosis of hip and pelvis, unspecified leg
    Billable
  20. M91.81
    Other juvenile osteochondrosis of hip and pelvis, right leg
    Billable
  21. M91.82
    Other juvenile osteochondrosis of hip and pelvis, left leg
    Billable
  22. M91.9
    Juvenile osteochondrosis of hip and pelvis, unspecified
    Header
  23. M91.90
    Juvenile osteochondrosis of hip and pelvis, unspecified, unspecified leg
    Billable
  24. M91.91
    Juvenile osteochondrosis of hip and pelvis, unspecified, right leg
    Billable
  25. M91.92
    Juvenile osteochondrosis of hip and pelvis, unspecified, left leg
    Billable

Sources of each column.

Instructions

At M91

Excludes1

  • slipped upper femoral epiphysis (nontraumatic) (M93.0-) M93.0

Notes that also apply

Block M91-M94 instructions (Excludes1 1): printed on the block page.

Chapter 13 instructions (Notes 1, Excludes2 10): printed on the chapter 13 page.

Index entries

  • Buchanan's disease or osteochondrosis → M91.0
  • Pierson's disease or osteochondrosis → M91.0
  • Van Neck's disease or osteochondrosis → M91.0
  • Legg (-Calvé)-Perthes disease, syndrome or osteochondrosis → M91.1-
  • Pseudocoxalgia → M91.3-
  • Osteochondrosisacetabulum (juvenile) → M91.0
  • OsteochondrosisBuchanan's → M91.0
  • Osteochondrosisilium, iliac crest (juvenile) → M91.0
  • Osteochondrosisischiopubic synchondrosis → M91.0
  • Osteochondrosispelvis (juvenile) → M91.0
  • OsteochondrosisPierson's → M91.0
  • Osteochondrosissymphysis pubis (juvenile) → M91.0
  • Osteochondrosisvan Neck's → M91.0
  • Synchondrosisischiopubic → M91.0
  • Coxaplana → M91.2-
  • Coxamagna → M91.4-
  • Osteochondrosisjuvenile, juveniliship and pelvis → M91.9-
  • Osteochondrosisjuvenile, juveniliship and pelvispelvis → M91.0
  • Osteochondrosisjuvenile, juveniliship and pelvisspecified NEC → M91.8-

NCHS Alphabetic Index. Index first, then the Tabular List.

Hierarchy