M21.70
BillableUnequal limb length (acquired), unspecified site
Unequal limb length (acquired), unspecified site
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 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)
- joints of the spine (M40-M54)
- acquired deformities of fingers or toes (M20.-)
- coxa plana (M91.2)
Also Known As / Clinical Terms
SNOMED CT
- Piston sign57756003
- Telescoping of limb at hip57756003
- Acquired unequal arm length203602007
- Acquired unequal upper limb length203602007
- Short arm249739008
- Proximal shortening of arm249740005
- Shortening of middle section of arm249741009
- Distal shortening of arm249742002
- Short leg249786007
- Apparent shortening of leg249787003
- Functional shortening of leg249787003
- Structural shortening of leg249788008
- True shortening of leg249788008
- Proximal shortening of leg249790009
- Shortening of middle section of leg249791008
- Distal shortening of leg249792001
- Acquired unequal limb length300261000119100
Frequently Asked Questions
What is the ICD-10 code for unequal limb length (acquired), unspecified site?
The ICD-10-CM code for unequal limb length (acquired), unspecified site is M21.70. The full clinical description is "Unequal limb length (acquired), unspecified site". M21.70 is a billable/specific code that can be used on insurance claims and medical billing.
What does ICD-10 code M21.70 mean?
ICD-10-CM code M21.70 represents "Unequal limb length (acquired), unspecified site". 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 M21.70 a billable code?
Yes, M21.70 is a billable/specific ICD-10-CM code and can be used to indicate a diagnosis on a medical claim.
What chapter is M21.70 in?
M21.70 is in Chapter 13: Diseases of the Musculoskeletal System and Connective Tissue (codes M00-M99).
What codes cannot be used with M21.70?
M21.70 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 M21.70 map to?
M21.70 maps to 13 SNOMED CT concepts: 203602007, 300261000119100, 249787003, 249742002, 249792001, and 8 more. SNOMED CT is a clinical terminology used in electronic health records.
What are the UMLS CUIs for M21.70?
M21.70 is linked to 1 UMLS Concept Unique Identifier: C0838042. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
Automate ICD-10 Coding With AI
Send clinical text to the AutoICD API and get back structured ICD-10 codes with confidence scores. Integrates into any EHR or billing system in minutes.
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.