S91.009A is the authoritative medical code for Unspecified open wound, unspecified ankle, initial encounter. This classification is used in medical billing and clinical recording to specify the clinical criteria for unspecified open wound, unspecified ankle, initial encounter (ICD-10-CM S91.009A), ensuring healthcare documentation aligns with current federal coding standards.
Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.
Official Registry Overview & Definition
Unspecified open wound, unspecified ankle, initial encounter is a billable ICD-10-CM diagnosis code S91.009A. Excludes1 (not coded here): open fracture of ankle, foot and toes (S92.-with 7th character B); traumatic amputation of ankle and foot S98.-. Excludes2 (not included here): burns and corrosions T20-T32; fracture of ankle and malleolus S82.-; frostbite T33-T34; insect bite or sting, venomous T63.4. Code also: any associated wound infection. 7th character: The appropriate 7th character is to be added to each code from category S91.
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for S91.009A in the official ICD-10-CM tabular list.
Excludes1 — Not Coded Here
Conditions that can never be reported with this code; the two are mutually exclusive.
- open fracture of ankle, foot and toes (S92.-with 7th character B)
- traumatic amputation of ankle and foot S98.-
Excludes2 — Not Included Here
Conditions not covered by this code, but which may be reported alongside it when both are present.
- burns and corrosions T20-T32
- fracture of ankle and malleolus S82.-
- frostbite T33-T34
- insect bite or sting, venomous T63.4
Code Also
Additional codes that may be required to fully describe the encounter.
- any associated wound infection
Frequently Asked Questions (FAQ) & Clinical Guidance
Does S91.009A require a 7th character?
Yes. The appropriate 7th character is to be added to each code from category S91.
What can't be coded together with S91.009A?
Per official ICD-10-CM Excludes1 instructions, S91.009A must not be reported together with: open fracture of ankle, foot and toes (S92.-with 7th character B); traumatic amputation of ankle and foot (S98.-).
Can S91.009A be reported alongside related conditions?
Per official ICD-10-CM Excludes2 instructions, S91.009A and the following are not considered part of each other and may both be reported when both conditions are present: burns and corrosions (T20-T32); fracture of ankle and malleolus (S82.-); frostbite (T33-T34); insect bite or sting, venomous (T63.4).
Nearest Codes in This Family
Official ICD-10-CM classifications closest to S91.009A in its code family, with their registry titles.
- S91.002 — Unspecified open wound, left ankle
- S91.002A — Unspecified open wound, left ankle, initial encounter
- S91.002D — Unspecified open wound, left ankle, subsequent encounter
- S91.002S — Unspecified open wound, left ankle, sequela
- S91.009 — Unspecified open wound, unspecified ankle
- S91.009D — Unspecified open wound, unspecified ankle, subsequent encounter
- S91.009S — Unspecified open wound, unspecified ankle, sequela
- S91.01 — Laceration without foreign body of ankle
- S91.011 — Laceration without foreign body, right ankle
- S91.011A — Laceration without foreign body, right ankle, initial encounter
View all 40 codes in the S91 family