M21.961
BillableUnspecified acquired deformity of right lower leg
Unspecified acquired deformity of right lower leg
Coding Notes
Excludes 1
Codes that cannot be used together with this code (mutual exclusion)
Excludes 2
Conditions not included here, but the patient may have both
- •arthropathic psoriasisL40.5
- •certain conditions originating in the perinatal periodP04-P96
- •certain infectious and parasitic diseasesA00-B99
- •compartment syndrome (traumatic)A-)T79
- •complications of pregnancy, childbirth and the puerperiumO9A)O00
- •congenital malformations, deformations, and chromosomal abnormalitiesQ00-Q99
- •endocrine, nutritional and metabolic diseasesE00-E88
- •injury, poisoning and certain other consequences of external causesS00-T88
- •neoplasmsC00-D49
- •symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classifiedR00-R94
- •joints of the spineM40-M54
- •acquired deformities of fingers or toesM20
- •coxa planaM91.2
Related Codes(2)
Also Known As / Clinical Terms(51)
SNOMED CT
- Acquired deformity of calcaneus111259002
- Deformity of calcaneum271096004
- Acquired deformity of right foot774123009
- Deformity of right foot840677008
- Acquired deformity of bilateral ankles15742121000119105
- Acquired deformity of both ankles15742121000119105
- Acquired deformity of bilateral calcaneus15934141000119101
- Acquired deformity of both calcaneus15934141000119101
- Acquired deformity of bilateral feet15741841000119101
- Acquired deformity of both feet15741841000119101
- Bilateral acquired deformity of feet15741841000119101
- Acquired deformity of bilateral knee regions15741681000119107
- Acquired deformity of both knee regions15741681000119107
- Bilateral acquired deformity of knee regions15741681000119107
- Acquired deformity of bilateral lower legs15742161000119100
- Acquired deformity of both lower legs15742161000119100
- Bilateral acquired deformity of lower legs15742161000119100
- Acquired deformity of left ankle15741881000119106
- Acquired deformity of left calcaneus1075261000119102
- Acquired deformity of left knee15741761000119106
- Acquired deformity of left lower leg300341000119105
- Acquired deformity of right ankle15741961000119109
- Acquired deformity of right calcaneus1075211000119100
- Acquired deformity of right knee15741721000119101
- Acquired deformity of right lower leg300381000119100
Clinical Terms
- Acquired deformity of both knee regions
- Acquired deformity of right foot
- Acquired deformity of both calcaneus
- Acquired deformity of right lower leg
- Deformity of right foot
- Acquired deformity of both ankles
- Acquired deformity of left lower leg
- Bilateral acquired deformity of lower legs
- Deformity of calcaneum
- Bilateral acquired deformity of knee regions
- Acquired deformity of right calcaneus
- Acquired deformity of both feet
- Bilateral acquired deformity of feet
- Acquired deformity of bilateral feet
- Acquired deformity of right ankle
- Acquired deformity of calcaneus
- Acquired deformity of left calcaneus
- Acquired deformity of bilateral knee regions
- Acquired deformity of left knee
- Acquired deformity of bilateral calcaneus
- Acquired deformity of right knee
- Acquired deformity of bilateral lower legs
- Acquired deformity of both lower legs
- Acquired deformity of bilateral ankles
- Acquired deformity of left ankle
Frequently Asked Questions
What is the ICD-10 code for unspecified acquired deformity of right lower leg?
The ICD-10-CM code for unspecified acquired deformity of right lower leg is M21.961. The full clinical description is "Unspecified acquired deformity of right lower leg". M21.961 is a billable/specific code that can be used on insurance claims and medical billing.
What does ICD-10 code M21.961 mean?
ICD-10-CM code M21.961 represents “Unspecified acquired deformity of right lower leg”. It is classified under Chapter 13: Diseases of the Musculoskeletal System and Connective Tissue and is a billable/specific code that can be used on a claim.
Is M21.961 a billable code?
Yes, M21.961 is a billable/specific ICD-10-CM code and can be used to indicate a diagnosis on a medical claim.
What chapter is M21.961 in?
M21.961 is in Chapter 13: Diseases of the Musculoskeletal System and Connective Tissue (codes M00-M99).
What codes cannot be used with M21.961?
M21.961 has Excludes1 notes indicating codes that cannot be used together with it, including: acquired absence of limb (Z89.-); congenital absence of limbs (Q71-Q73); congenital deformities and malformations of limbs (Q65-Q66, Q68-Q74).
What SNOMED CT codes does M21.961 map to?
M21.961 maps to 17 SNOMED CT concepts: 15742121000119105, 15934141000119101, 15741841000119101, 15741681000119107, 15742161000119100, and 12 more. SNOMED CT is a clinical terminology used in electronic health records.
What are the UMLS CUIs for M21.961?
M21.961 is linked to 1 UMLS Concept Unique Identifier: C2894573. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
How does M21.961 relate to ICF functioning codes?
ICF (International Classification of Functioning, Disability and Health) codes describe how conditions like unspecified acquired deformity of right lower leg affect a person's functioning — body functions, activities, participation, and environmental factors. AutoICD provides ICF Core Sets for 12+ conditions and can map clinical text to ICF categories automatically. Browse the ICF directory to explore functioning codes.
What is the ICD-11 equivalent of M21.961?
There is no direct ICD-11 mapping available for M21.961 in the WHO crosswalk tables. This may mean the concept is classified differently in ICD-11. Use the ICD-10 to ICD-11 converter to search for related codes.
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Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.