ICD-10-CM
ICD-10 code for Hallux valgus: M20.10
The closest CDC title for "Hallux valgus" is M20.10, Hallux valgus (acquired), unspecified foot. M20.10 is a billable code.
Source: CDC ICD-10-CM FY2027 order file dated June 16, 2026. Publisher page
Run it in Rivvi
Check every code on your export
Upload a claims or problem-list export. Rivvi flags codes that are not billable, replaced, or unspecified when a specific code exists.
Check my exportFree to start. Opens Rivvi, the AI workspace for healthcare teams.
Codes under M20, then other CDC titles that name hallux valgus (acquired), unspecified foot
A header groups codes and is not billed. A billable code is one you can report.
- M20Acquired deformities of fingers and toesHeader
- M20.0Deformity of finger (s), Deformity of finger(s)Header
- M20.00Unspecified deformity of finger (s), Unspecified deformity of finger(s)Header
- M20.001Unspecified deformity of right finger (s), Unspecified deformity of right finger(s)Billable
- M20.002Unspecified deformity of left finger (s), Unspecified deformity of left finger(s)Billable
- M20.009Unspecified deformity of unspecified finger (s), Unspecified deformity of unspecified finger(s)Billable
- M20.01Mallet fingerHeader
- M20.011Mallet finger of right finger (s), Mallet finger of right finger(s)Billable
- M20.012Mallet finger of left finger (s), Mallet finger of left finger(s)Billable
- M20.019Mallet finger of unspecified finger (s), Mallet finger of unspecified finger(s)Billable
- M20.02Boutonniere deformityHeader
- M20.021Boutonniere deformity of right finger (s), Boutonniere deformity of right finger(s)Billable
- M20.022Boutonniere deformity of left finger (s), Boutonniere deformity of left finger(s)Billable
- M20.029Boutonniere deformity of unspecified finger (s), Boutonniere deformity of unspecified finger(s)Billable
- M20.03Swan-neck deformityHeader
- M20.031Swan-neck deformity of right finger (s), Swan-neck deformity of right finger(s)Billable
- M20.032Swan-neck deformity of left finger (s), Swan-neck deformity of left finger(s)Billable
- M20.039Swan-neck deformity of unspecified finger (s), Swan-neck deformity of unspecified finger(s)Billable
- M20.09Other deformity of finger (s), Other deformity of finger(s)Header
- M20.091Other deformity of right finger (s), Other deformity of right finger(s)Billable
- M20.092Other deformity of left finger (s), Other deformity of left finger(s)Billable
- M20.099Other deformity of finger (s), unspecified finger (s), Other deformity of finger(s), unspecified finger(s)Billable
- M20.1Hallux valgus (acquired)Header
- M20.10Hallux valgus (acquired), unspecified footBillable
- M20.11Hallux valgus (acquired), right footBillable
- M20.12Hallux valgus (acquired), left footBillable
- M20.2Hallux rigidusHeader
- M20.20Hallux rigidus, unspecified footBillable
- M20.21Hallux rigidus, right footBillable
- M20.22Hallux rigidus, left footBillable
- M20.3Hallux varus (acquired)Header
- M20.30Hallux varus (acquired), unspecified footBillable
- M20.31Hallux varus (acquired), right footBillable
- M20.32Hallux varus (acquired), left footBillable
- M20.4Other hammer toe (s) (acquired), Other hammer toe(s) (acquired)Header
- M20.40Other hammer toe (s) (acquired), unspecified foot, Other hammer toe(s) (acquired), unspecified footBillable
- M20.41Other hammer toe (s) (acquired), right foot, Other hammer toe(s) (acquired), right footBillable
- M20.42Other hammer toe (s) (acquired), left foot, Other hammer toe(s) (acquired), left footBillable
- M20.5Other deformities of toe (s) (acquired), Other deformities of toe(s) (acquired)Header
- M20.5XOther deformities of toe (s) (acquired), Other deformities of toe(s) (acquired)Header
- M20.5X1Other deformities of toe (s) (acquired), right foot, Other deformities of toe(s) (acquired), right footBillable
- M20.5X2Other deformities of toe (s) (acquired), left foot, Other deformities of toe(s) (acquired), left footBillable
- M20.5X9Other deformities of toe (s) (acquired), unspecified foot, Other deformities of toe(s) (acquired), unspecified footBillable
- M20.6Acquired deformities of toe (s), unspecified, Acquired deformities of toe(s), unspecifiedHeader
- M20.60Acquired deformities of toe (s), unspecified, unspecified foot, Acquired deformities of toe(s), unspecified, unspecified footBillable
- M20.61Acquired deformities of toe (s), unspecified, right foot, Acquired deformities of toe(s), unspecified, right footBillable
- M20.62Acquired deformities of toe (s), unspecified, left foot, Acquired deformities of toe(s), unspecified, left footBillable
Excludes1
Excludes1 means these codes are not reported together.
From M20. A note on a category applies to every code under it.
Excludes2
Excludes2 means the other condition can be reported with this one when both are documented.
From M20.1. A note on a category applies to every code under it.
Related conditions
Related pages
- M20.10 code detailsNotes, nearby codes, CMS-HCC group
- Category M20Every code under it
- Chapter 13Diseases of the musculoskeletal system
- ICD-10 codes by conditionA to Z
- Check a list of ICD-10 codes
- Denial code CO-11Diagnosis does not support the procedure
- Denial code CO-146Diagnosis invalid for the date of service
- HCPCS Level II code lookup
Questions
What is the ICD-10 code for Hallux valgus?
The closest CDC title for "Hallux valgus" is M20.10, Hallux valgus (acquired), unspecified foot. M20.10 is a billable code.
Is M20.10 billable?
Yes. M20.10 is a billable code in the FY2027 ICD-10-CM file. Use a more specific code when the record documents one.
What documentation notes apply to M20.10?
The CDC tabular list gives 3 Excludes1 notes (not coded together), 1 Excludes2 note (may be coded together when both are documented) for M20.10 and the categories above it. They are listed on this page.
What chapter is M20.10 in?
Chapter 13. Diseases of the musculoskeletal system.
When do ICD-10-CM codes change?
Every October 1, with the new fiscal year file. Some years add April 1 updates. This page uses the FY2027 file, effective October 1, 2026.