S99.9
Non-billableUnspecified injury of ankle and foot
Unspecified injury of ankle and foot
This is a header/category code. For billing purposes, use a more specific child code from the list below.
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
Use Additional Code
Additional codes that should follow this code
- code to identify any retained foreign body, if applicable (Z18.-)
7th Character Definitions
- A - initial encounter
- D - subsequent encounter
- S - sequela
Child Codes (2)
Also Known As / Clinical Terms
Frequently Asked Questions
What is ICD-10 code S99.9?
ICD-10-CM code S99.9 represents "Unspecified injury of ankle and foot". It is a non-billable header code — use a more specific child code for billing purposes.
Is S99.9 a billable code?
No, S99.9 is a non-billable header code. You need to use one of its more specific child codes for billing. There are 2 child codes under S99.9.
What chapter is S99.9 in?
S99.9 is in Chapter 19: Injury, Poisoning and Certain Other Consequences of External Causes (codes S00-T88).
What codes cannot be used with S99.9?
S99.9 has Excludes1 notes indicating codes that cannot be used together with it, including: birth trauma (P10-P15); obstetric trauma (O70-O71).
What are the subcategories under S99.9?
S99.9 has 2 child codes, including: S99.91 (Unspecified injury of ankle), S99.92 (Unspecified injury of foot).
Are additional codes required with S99.9?
Yes, when using S99.9 you should also code: code to identify any retained foreign body, if applicable (Z18.-).
What are the UMLS CUIs for S99.9?
S99.9 is linked to 1 UMLS Concept Unique Identifier: C0348772. 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.