S01.90XS — Unspecified open wound of unspecified part of head, sequela
Is S01.90XS billable?
Yes, but S01.90XS is an unspecified code. S01.90XS is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, S01.90XS is an unspecified or catch-all code. Payers apply additional scrutiny to unspecified codes and many deny them when the medical record supports a more specific option, so check the documentation before selecting S01.90XS — the more specific alternatives are listed below.
More specific alternatives
- S01.00XSUnspecified open wound of scalp, sequela
- S01.101SUnspecified open wound of right eyelid and periocular area, sequela
- S01.20XSUnspecified open wound of nose, sequela
- S01.301SUnspecified open wound of right ear, sequela
- S01.401SUnspecified open wound of right cheek and temporomandibular area, sequela
- S01.501SUnspecified open wound of lip, sequela
- S01.80XSUnspecified open wound of other part of head, sequela
S01.90XS at a glance
| Code | S01.90XS |
|---|---|
| Description | Unspecified open wound of unspecified part of head, sequela |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
| 7th character "S" | sequela |
What does the 7th character "S" mean in S01.90XS?
In S01.90XS, the 7th character S means sequela. The 7th character is required for S01.90XS to be a valid, complete code.
Same condition, different episode of care — switch the 7th character:
Which MS-DRGs does S01.90XS group to?
S01.90XS sits in MDC 09 and helps define the logic of 2 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 604Trauma to the Skin, Subcutaneous Tissue and Breast with MCCmedical
- 605Trauma to the Skin, Subcutaneous Tissue and Breast without MCCmedical
How is S01.90XS listed in the Alphabetic Index?
The Alphabetic Index lists these routes under S01.90, the nearest indexed parent of S01.90XS. Use them to find the family, then select the specific code.
- Wound, open › head
Excludes1 — never code together — inherited from S01
The conditions below can never be reported together with S01.90XS on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- open skull fracture (S02.- with 7th character B)
Use additional code — inherited from Chapter 19
Report an additional code alongside S01.90XS to fully describe the condition. S01.90XS is sequenced first.
- code to identify any retained foreign body, if applicable (Z18.-)
Excludes2 — not included here — inherited from Chapter 19
The conditions below are not part of S01.90XS, but a patient may have both at the same time. When documentation supports it, S01.90XS and the excluded code may both be reported.
Excludes2 — not included here — inherited from S00-S09
The conditions below are not part of S01.90XS, but a patient may have both at the same time. When documentation supports it, S01.90XS and the excluded code may both be reported.
- burns and corrosions (T20-T32)
- effects of foreign body in ear (T16)
- effects of foreign body in larynx (T17.3)
- effects of foreign body in mouth NOS (T18.0)
- effects of foreign body in nose (T17.0-T17.1)
- effects of foreign body in pharynx (T17.2)
- effects of foreign body on external eye (T15.-)
- frostbite (T33-T34)
- insect bite or sting, venomous (T63.4)
Excludes2 — not included here — inherited from S01
The conditions below are not part of S01.90XS, but a patient may have both at the same time. When documentation supports it, S01.90XS and the excluded code may both be reported.
Code also — inherited from S00-S09
Two codes may be needed to describe the condition fully. Whether S01.90XS is sequenced first depends on the reason for the encounter.
- for any associated infection
Code also — inherited from S01
Two codes may be needed to describe the condition fully. Whether S01.90XS is sequenced first depends on the reason for the encounter.
How long has S01.90XS existed?
S01.90XS has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.