2021 ICD-10-CM Diagnosis Code M66.174

Rupture of synovium, right foot

    2016 2017 2018 2019 2020 2021 Billable/Specific Code
  • M66.174 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 M66.174 became effective on October 1, 2020.
  • This is the American ICD-10-CM version of M66.174 - other international versions of ICD-10 M66.174 may differ.
The following code(s) above M66.174 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 M66.174:
  • 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
  • M66
    ICD-10-CM Diagnosis Code M66

    Spontaneous rupture of synovium and tendon

      2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
    • rupture that occurs when a normal force is applied to tissues that are inferred to have less than normal strength
    Type 2 Excludes
    • rotator cuff syndrome (M75.1-)
    • rupture where an abnormal force is applied to normal tissue - see injury of tendon by body region
    Spontaneous rupture of synovium and tendon
  • M66.1
    ICD-10-CM Diagnosis Code M66.1

    Rupture of synovium

      2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
    Applicable To
    • Rupture of synovial cyst
    Type 2 Excludes
    • rupture of popliteal cyst (M66.0)
    Rupture of synovium
Approximate Synonyms
  • Rupture of synovium of right foot
  • Synovial rupture of right foot
ICD-10-CM M66.174 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 M66.174 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 M66.174
M66.145 Rupture of synovium, left finger(s)
M66.146 Rupture of synovium, unspecified finger(s)
M66.15 Rupture of synovium, hip
M66.151 Rupture of synovium, right hip
M66.152 Rupture of synovium, left hip
M66.159 Rupture of synovium, unspecified hip
M66.17 Rupture of synovium, ankle, foot and toes
M66.171 Rupture of synovium, right ankle
M66.172 Rupture of synovium, left ankle
M66.173 Rupture of synovium, unspecified ankle
M66.174 Rupture of synovium, right foot
M66.175 Rupture of synovium, left foot
M66.176 Rupture of synovium, unspecified foot
M66.177 Rupture of synovium, right toe(s)
M66.178 Rupture of synovium, left toe(s)
M66.179 Rupture of synovium, unspecified toe(s)
M66.18 …… other site
M66.2 Spontaneous rupture of extensor tendons
M66.20 …… unspecified site
M66.21 Spontaneous rupture of extensor tendons, shoulder
M66.211 Spontaneous rupture of extensor tendons, right shoulder

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