T33.821D — Superficial frostbite of right foot, subsequent encounter
Is T33.821D billable?
Yes — T33.821D is billable for FY2027. T33.821D is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. T33.821D may be submitted for encounters from October 1, 2026 through September 30, 2027.
T33.821D at a glance
| Code | T33.821D |
|---|---|
| Description | Superficial frostbite of right foot, 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 T33.821D?
In T33.821D, the 7th character D means subsequent encounter. The 7th character is required for T33.821D to be a valid, complete code.
Same condition, different episode of care — switch the 7th character:
Which MS-DRGs does T33.821D group to?
T33.821D 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 T33.821D listed in the Alphabetic Index?
The Alphabetic Index lists these routes under T33.82, the nearest indexed parent of T33.821D. Use them to find the family, then select the specific code.
- Frostbite › foot (superficial)
Use additional code — inherited from Chapter 19
Report an additional code alongside T33.821D to fully describe the condition. T33.821D 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 T33.821D, but a patient may have both at the same time. When documentation supports it, T33.821D and the excluded code may both be reported.
Excludes2 — not included here — inherited from T33-T34
The conditions below are not part of T33.821D, but a patient may have both at the same time. When documentation supports it, T33.821D and the excluded code may both be reported.
How long has T33.821D existed?
T33.821D 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.