AutoICD API

M21.2

Non-billable

Flexion deformity

Flexion deformity

This is a header/category code. For billing purposes, use a more specific child code from the list below.

Status

Non-billable / Header

Block

M20-M25

Parent Code

M21

Child Codes

8

Coding Notes

Excludes 1

Codes that cannot be used together with this code (mutual exclusion)

  • acquired absence of limb (Z89.-)
  • congenital absence of limbs (Q71-Q73)
  • congenital deformities and malformations of limbs (Q65-Q66, Q68-Q74)

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)

Child Codes (8)

M21.20

Flexion deformity, unspecified site

BillableM21.21

Flexion deformity, shoulder

M21.22

Flexion deformity, elbow

M21.23

Flexion deformity, wrist

M21.24

Flexion deformity, finger joints

M21.25

Flexion deformity, hip

M21.26

Flexion deformity, knee

M21.27

Flexion deformity, ankle and toes

Also Known As / Clinical Terms

UMLS

Frequently Asked Questions

What is ICD-10 code M21.2?

ICD-10-CM code M21.2 represents "Flexion deformity". It is a non-billable header code — use a more specific child code for billing purposes.

Is M21.2 a billable code?

No, M21.2 is a non-billable header code. You need to use one of its more specific child codes for billing. There are 8 child codes under M21.2.

What chapter is M21.2 in?

M21.2 is in Chapter 13: Diseases of the Musculoskeletal System and Connective Tissue (codes M00-M99).

What codes cannot be used with M21.2?

M21.2 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 are the subcategories under M21.2?

M21.2 has 8 child codes, including: M21.20 (Flexion deformity, unspecified site), M21.21 (Flexion deformity, shoulder), M21.22 (Flexion deformity, elbow), M21.23 (Flexion deformity, wrist), and 4 more.

What are the UMLS CUIs for M21.2?

M21.2 is linked to 1 UMLS Concept Unique Identifier: C0333068. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.

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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.