All ICD10 Codes

M20

Non-Billable
ChapterM00–M99
Rankcategory
Official Description

Acquired deformities of fingers and toes

Use a more specific code (0 billable, 7 non-billable)
M20.0Deformity of finger(s)has subcodesM20.1Hallux valgus (acquired)has subcodesM20.2Hallux rigidushas subcodesM20.3Hallux varus (acquired)has subcodesM20.4Other hammer toe(s) (acquired)has subcodesM20.5Other deformities of toe(s) (acquired)has subcodesM20.6Acquired deformities of toe(s), unspecifiedhas subcodes
Metadata & Insights
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 13: Diseases of the Musculoskeletal System and Connective Tissue (M00-M99).

CH13 Parent Instructions

Excludes2(Not included here. Code separately if applicable.)
  • 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)

M20-M25 Parent Instructions

Excludes2(Not included here. Code separately if applicable.)

Instructional Notes

Excludes1(Not coded here. Use a different code.)
  • acquired absence of fingers and toes (Z89.-)
  • congenital absence of fingers and toes (Q71.3-, Q72.3-)
  • congenital deformities and malformations of fingers and toes (Q66.-, Q68-Q70, Q74.-)

Clinical Hierarchy

BillableHas subcodes
CH13Diseases of the musculoskeletal system and connective tissue (M00-M99)
M20-M25Other joint disorders (M20-M25)
M20Acquired deformities of fingers and toesNot billable
M20.0Deformity of finger(s)Subcodes
M20.1Hallux valgus (acquired)Subcodes
M20.2Hallux rigidusSubcodes
M20.3Hallux varus (acquired)Subcodes
M20.4Other hammer toe(s) (acquired)Subcodes
M20.5Other deformities of toe(s) (acquired)Subcodes
M20.6Acquired deformities of toe(s), unspecifiedSubcodes

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to M20:

blockM20-M25
Other joint disorders (M20-M25)
View context instructions
chapterCH13
Diseases of the musculoskeletal system and connective tissue (M00-M99)
View context instructions

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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