T21.44XD — Corrosion of unspecified degree of lower back, subsequent encounter
Is T21.44XD billable?
Yes, but T21.44XD is an unspecified code. T21.44XD is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, T21.44XD 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 T21.44XD — the more specific alternatives are listed below.
More specific alternatives
- T21.10XDBurn of first degree of trunk, unspecified site, subsequent encounter
- T21.20XDBurn of second degree of trunk, unspecified site, subsequent encounter
- T21.30XDBurn of third degree of trunk, unspecified site, subsequent encounter
- T21.50XDCorrosion of first degree of trunk, unspecified site, subsequent encounter
- T21.60XDCorrosion of second degree of trunk, unspecified site, subsequent encounter
- T21.70XDCorrosion of third degree of trunk, unspecified site, subsequent encounter
T21.44XD at a glance
| Code | T21.44XD |
|---|---|
| Description | Corrosion of unspecified degree of lower back, subsequent encounter |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
| 7th character "D" | subsequent encounter |
What does the 7th character "D" mean in T21.44XD?
In T21.44XD, the 7th character D means subsequent encounter. The 7th character is required for T21.44XD to be a valid, complete code.
Same condition, different episode of care — switch the 7th character:
Which MS-DRGs does T21.44XD group to?
T21.44XD sits in MDC 23 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.
- 949Aftercare with CC/MCCmedical
- 950Aftercare without CC/MCCmedical
How is T21.44XD listed in the Alphabetic Index?
The Alphabetic Index lists these routes under T21.44, the nearest indexed parent of T21.44XD. Use them to find the family, then select the specific code.
- Corrosion › back (injury) (acid) (caustic) (chemical) (lime) (external) (internal)
Code first — inherited from T21.4
The underlying condition below must be sequenced before T21.44XD. T21.44XD describes a manifestation and cannot be the principal or first-listed diagnosis.
- (T51-T65) to identify chemical and intent
Use additional code — inherited from Chapter 19
Report an additional code alongside T21.44XD to fully describe the condition. T21.44XD is sequenced first.
- code to identify any retained foreign body, if applicable (Z18.-)
Use additional code — inherited from T20-T25
Report an additional code alongside T21.44XD to fully describe the condition. T21.44XD is sequenced first.
Use additional code — inherited from T21.4
Report an additional code alongside T21.44XD to fully describe the condition. T21.44XD is sequenced first.
- external cause code to identify place (Y92)
Excludes2 — not included here — inherited from Chapter 19
The conditions below are not part of T21.44XD, but a patient may have both at the same time. When documentation supports it, T21.44XD and the excluded code may both be reported.
Excludes2 — not included here — inherited from T21
The conditions below are not part of T21.44XD, but a patient may have both at the same time. When documentation supports it, T21.44XD and the excluded code may both be reported.
How long has T21.44XD existed?
T21.44XD 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.