ICD-10-CM — Chapter 13

Diseases of the musculoskeletal system and connective tissue - Use for Osteoporosis, Osteoarthritis, and other osteopathies, joint disorders, and other disorders of the musculoskeletal system and connective tissue.

Tabular List

Find your ICD-10-CM code by first selecting the most applicable chapter

Diseases of the musculoskeletal system and connective tissue

- Use for Osteoporosis, Osteoarthritis, and other osteopathies, joint disorders, and other disorders of the musculoskeletal system and connective tissue.

Note: Use an external cause code following the code for the musculoskeletal condition, if applicable, to identify the cause of the musculoskeletal condition


  • arthropathic psoriasis (L40.5-)
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • compartment syndrome (traumatic) (T79.A-)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
Expand All Chapter #13 contains the following ICD-10-CM sections:

This block comprises arthropathies due to microbiological agents. Distinction is made between the following types of etiological relationship:
a) direct infection of joint, where organisms invade synovial tissue and microbial antigen is present in the joint;
b) indirect infection, which may be of two types: a reactive arthropathy, where microbial infection of the body is established but neither organisms nor antigens can be identified in the joint, and a postinfective arthropathy, where microbial antigen is present but recovery of an organism is inconstant and evidence of local multiplication is lacking.

  • M00 Pyogenic arthritis

  • M01 Direct infections of joint in infectious and parasitic diseases classified elsewhere

  • M02 Postinfective and reactive arthropathies

  • M04 Autoinflammatory syndromes

  • M05 Rheumatoid arthritis with rheumatoid factor

  • M06 Other rheumatoid arthritis

  • M07 Enteropathic arthropathies

  • M08 Juvenile arthritis

  • M10 Gout

    Inclusion term(s):

    • Acute gout
    • Gout attack
    • Gout flare
    • Podagra
  • M11 Other crystal arthropathies

  • M12 Other and unspecified arthropathy

  • M13 Other arthritis

  • M14 Arthropathies in other diseases classified elsewhere

  • M1A Chronic gout


  • osteoarthritis of spine (M47.-)
  • M15 Polyosteoarthritis

  • M16 Osteoarthritis of hip

  • M17 Osteoarthritis of knee

  • M18 Osteoarthritis of first carpometacarpal joint

  • M19 Other and unspecified osteoarthritis


  • M20 Acquired deformities of fingers and toes

  • M21 Other acquired deformities of limbs

  • M22 Disorder of patella

  • M23 Internal derangement of knee

  • M24 Other specific joint derangements

  • M25 Other joint disorder, not elsewhere classified


  • hemifacial atrophy or hypertrophy (Q67.4)
  • unilateral condylar hyperplasia or hypoplasia (M27.8)
  • M26 Dentofacial anomalies [including malocclusion]

  • M27 Other diseases of jaws


  • autoimmune disease NOS
  • collagen (vascular) disease NOS
  • systemic autoimmune disease
  • systemic collagen (vascular) disease


  • autoimmune disease, single organ or single cell-type -code to relevant condition category
  • M30 Polyarteritis nodosa and related conditions

  • M31 Other necrotizing vasculopathies

  • M32 Systemic lupus erythematosus (SLE)

  • M33 Dermatopolymyositis

  • M34 Systemic sclerosis [scleroderma]

  • M35 Other systemic involvement of connective tissue

  • M36 Systemic disorders of connective tissue in diseases classified elsewhere

  • M40 Kyphosis and lordosis

  • M41 Scoliosis

  • M42 Spinal osteochondrosis

  • M43 Other deforming dorsopathies

  • M45 Ankylosing spondylitis

    Inclusion term(s):

    • Rheumatoid arthritis of spine
  • M46 Other inflammatory spondylopathies

  • M47 Spondylosis

  • M48 Other spondylopathies

  • M49 Spondylopathies in diseases classified elsewhere


  • current injury - see injury of spine by body region
  • discitis NOS (M46.4-)
  • M50 Cervical disc disorders

  • M51 Thoracic, thoracolumbar, and lumbosacral intervertebral disc disorders

  • M53 Other and unspecified dorsopathies, not elsewhere classified

  • M54 Dorsalgia


  • dermatopolymyositis (M33.-)
  • myopathy in amyloidosis (E85.-)
  • myopathy in polyarteritis nodosa (M30.0)
  • myopathy in rheumatoid arthritis (M05.32)
  • myopathy in scleroderma (M34.-)
  • myopathy in Sj√∂gren's syndrome (M35.03)
  • myopathy in systemic lupus erythematosus (M32.-)


  • muscular dystrophies and myopathies (G71-G72)
  • M60 Myositis

  • M61 Calcification and ossification of muscle

  • M62 Other disorders of muscle

  • M63 Disorders of muscle in diseases classified elsewhere

  • M65 Synovitis and tenosynovitis

  • M66 Spontaneous rupture of synovium and tendon

  • M67 Other disorders of synovium and tendon

  • M70 Soft tissue disorders related to use, overuse and pressure

  • M71 Other bursopathies

  • M72 Fibroblastic disorders

  • M75 Shoulder lesions

  • M76 Enthesopathies, lower limb, excluding foot

  • M77 Other enthesopathies

  • M79 Other and unspecified soft tissue disorders, not elsewhere classified

  • M80 Osteoporosis with current pathological fracture

  • M81 Osteoporosis without current pathological fracture

  • M83 Adult osteomalacia

  • M84 Disorder of continuity of bone

  • M85 Other disorders of bone density and structure


  • postprocedural osteopathies (M96.-)
  • M86 Osteomyelitis

  • M87 Osteonecrosis

  • M88 Osteitis deformans [Paget's disease of bone]

  • M89 Other disorders of bone

  • M90 Osteopathies in diseases classified elsewhere


  • postprocedural chondropathies (M96.-)
  • M91 Juvenile osteochondrosis of hip and pelvis

  • M92 Other juvenile osteochondrosis

  • M93 Other osteochondropathies

  • M94 Other disorders of cartilage

  • M95 Other acquired deformities of musculoskeletal system and connective tissue

  • M96 Intraoperative and postprocedural complications and disorders of musculoskeletal system, not elsewhere classified

  • M97 Periprosthetic fracture around internal prosthetic joint

  • M99 Biomechanical lesions, not elsewhere classified

    Note: This category should not be used if the condition can be classified elsewhere.