T38
ICD-10Non-billable categoryHormones and their synthetic substitutes and antag, NEC
Official ICD-10-CM descriptor (FY2026)
Poisoning by, adverse effect of and underdosing of hormones and their synthetic substitutes and antagonists, not elsewhere classified
T38 is a category heading, not a billable code. CMS does not accept it on a claim; report one of the more specific codes beneath it.
Excludes1
Not coded here. An Excludes1 code should never be reported at the same time as the code above it.
- mineralocorticoids and their antagonists (T50.0-)
- oxytocic hormones (T48.0-)
- parathyroid hormones and derivatives (T50.9-)
7th character
- The appropriate 7th character is to be added to each code from category T38
Permitted 7th characters
| A | initial encounter |
| D | subsequent encounter |
| S | sequela |
More specific codes under T38
- T38.0Glucocorticoids and synthetic analoguescategory
- T38.1Thyroid hormones and substitutescategory
- T38.2Antithyroid drugscategory
- T38.3Insulin and oral hypoglycemic drugscategory
- T38.4Oral contraceptivescategory
- T38.5Estrogens and progestogenscategory
- T38.6Antigonadtr/antiestr/antiandrg, not elsewhere classifiedcategory
- T38.7Androgens and anabolic congenerscategory
- T38.8And unsp hormones and synthetic substitutescategory
- T38.9And unsp hormone antagonistscategory
Where this code sits
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ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.