P00 vs T38
P00 (Newborn affected by maternal conditions that may be unrelated to present pregnancy) compared with T38 (Poisoning by, adverse effect of and underdosing of hormones and their synthetic substitutes and antagonists, not elsewhere classified), from the official CMS tabular data. Both may be reported when both conditions are documented (Excludes2).
Can these codes be reported together?
Yes, when both are documented. T38 carries an Excludes2 note covering P00: “drug reaction and poisoning affecting newborn (P00-P96)”
Excludes2 marks distinct conditions — both may be reported when both are documented.
Side by side
| P00Newborn affected by maternal conditions that may be unrelated to present pregnancy | T38Poisoning by, adverse effect of and underdosing of hormones and their synthetic substitutes and antagonists, not elsewhere classified | |
|---|---|---|
| Billing status | Non-billable header | Non-billable header Report instead: T38.0X1A, T38.0X1D, T38.0X1S, T38.0X2A, T38.0X2D |
| Classification | P00-P96 — Certain Conditions Originating in the Perinatal Period (P00-P96) | S00-T88 — Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88) |
| Definition | Newborn affected by maternal conditions that may be unrelated to present pregnancy is a non-billable ICD-10-CM category code (P00). | Poisoning by, adverse effect of and underdosing of hormones and their synthetic substitutes and antagonists, not elsewhere classified is a non-billable ICD-10-CM category code (T38). |
| 7th character | — | The appropriate 7th character is to be added to each code from category T38 |
| Includes | — | adverse effect of correct substance properly administered poisoning by overdose of substance poisoning by wrong substance given or taken in error underdosing by (inadvertently) (deliberately) taking less substance than prescribed or instructed |
| Use additional code | — | code(s) to specify: manifestations of poisoning underdosing or failure in dosage during medical and surgical care (Y63.6, Y63.8-Y63.9) |
| Code first | any current condition in newborn | , for adverse effects, the nature of the adverse effect, such as: adverse effect NOS (T88.7) |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources