2021 ICD-10-CM Diagnosis Code M61.171

Myositis ossificans progressiva, right ankle

    2016 2017 2018 2019 2020 2021 Billable/Specific Code
  • M61.171 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2021 edition of ICD-10-CM M61.171 became effective on October 1, 2020.
  • This is the American ICD-10-CM version of M61.171 - other international versions of ICD-10 M61.171 may differ.
The following code(s) above M61.171 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to M61.171:
  • M00-M99
    2021 ICD-10-CM Range M00-M99

    Diseases of the musculoskeletal system and connective tissue

    • Use an external cause code following the code for the musculoskeletal condition, if applicable, to identify the cause of the musculoskeletal condition
    Type 2 Excludes
    • 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)
    Diseases of the musculoskeletal system and connective tissue
  • M60-M63
    2021 ICD-10-CM Range M60-M63

    Disorders of muscles

    Type 1 Excludes
    • dermatopolymyositis (M33.-)
    • muscular dystrophies and myopathies (G71-G72)
    • myopathy in amyloidosis (E85.-)
    • myopathy in polyarteritis nodosa (M30.0)
    • myopathy in rheumatoid arthritis (M05.32)
    • myopathy in scleroderma (M34.-)
    • myopathy in Sjögren's syndrome (M35.03)
    • myopathy in systemic lupus erythematosus (M32.-)
    Disorders of muscles
  • M61.1
    ICD-10-CM Diagnosis Code M61.1

    Myositis ossificans progressiva

      2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
    Applicable To
    • Fibrodysplasia ossificans progressiva
    Myositis ossificans progressiva
Approximate Synonyms
  • Myositis ossificans progressiva involving right ankle
  • Myositis ossificans progressiva of bilateral ankles
  • Myositis ossificans progressiva of right ankle
ICD-10-CM M61.171 is grouped within Diagnostic Related Group(s) (MS-DRG v38.0):
  • 557 Tendonitis, myositis and bursitis with mcc
  • 558 Tendonitis, myositis and bursitis without mcc

Convert M61.171 to ICD-9-CM

Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
  • 2021 (effective 10/1/2020): No change
ICD-10-CM Codes Adjacent To M61.171
M61.146 Myositis ossificans progressiva, unspecified finger(s)
M61.15 Myositis ossificans progressiva, thigh
M61.151 Myositis ossificans progressiva, right thigh
M61.152 Myositis ossificans progressiva, left thigh
M61.159 Myositis ossificans progressiva, unspecified thigh
M61.16 Myositis ossificans progressiva, lower leg
M61.161 Myositis ossificans progressiva, right lower leg
M61.162 Myositis ossificans progressiva, left lower leg
M61.169 Myositis ossificans progressiva, unspecified lower leg
M61.17 Myositis ossificans progressiva, ankle, foot and toe(s)
M61.171 Myositis ossificans progressiva, right ankle
M61.172 Myositis ossificans progressiva, left ankle
M61.173 Myositis ossificans progressiva, unspecified ankle
M61.174 Myositis ossificans progressiva, right foot
M61.175 Myositis ossificans progressiva, left foot
M61.176 Myositis ossificans progressiva, unspecified foot
M61.177 Myositis ossificans progressiva, right toe(s)
M61.178 Myositis ossificans progressiva, left toe(s)
M61.179 Myositis ossificans progressiva, unspecified toe(s)
M61.18 …… other site
M61.19 …… multiple sites

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.