T45.603A — Poisoning by unspecified fibrinolysis-affecting drugs, assault, initial encounter
Is T45.603A billable?
Yes, but T45.603A is an unspecified code. T45.603A is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, T45.603A 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 T45.603A — the more specific alternatives are listed below.
T45.603A at a glance
| Code | T45.603A |
|---|---|
| Description | Poisoning by unspecified fibrinolysis-affecting drugs, assault, initial encounter |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
| 7th character "A" | initial encounter |
What does the 7th character "A" mean in T45.603A?
In T45.603A, the 7th character A means initial encounter. The 7th character is required for T45.603A to be a valid, complete code.
Same condition, different episode of care — switch the 7th character:
Which MS-DRGs does T45.603A group to?
T45.603A sits in MDC 21 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.
- 917Poisoning and Toxic Effects of Drugs with MCCmedical
- 918Poisoning and Toxic Effects of Drugs without MCCmedical
Excludes1 — never code together — inherited from T36-T50
The conditions below can never be reported together with T45.603A on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- toxic reaction to local anesthesia in pregnancy (O29.3-)
Code first — inherited from T36-T50
The underlying condition below must be sequenced before T45.603A. T45.603A describes a manifestation and cannot be the principal or first-listed diagnosis.
Use additional code — inherited from Chapter 19
Report an additional code alongside T45.603A to fully describe the condition. T45.603A is sequenced first.
- code to identify any retained foreign body, if applicable (Z18.-)
Use additional code — inherited from T36-T50
Report an additional code alongside T45.603A to fully describe the condition. T45.603A is sequenced first.
Excludes2 — not included here — inherited from Chapter 19
The conditions below are not part of T45.603A, but a patient may have both at the same time. When documentation supports it, T45.603A and the excluded code may both be reported.
Excludes2 — not included here — inherited from T36-T50
The conditions below are not part of T45.603A, but a patient may have both at the same time. When documentation supports it, T45.603A and the excluded code may both be reported.
How long has T45.603A existed?
T45.603A 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.