ICD-10-CM 2027
ICD-10 code for thyroid findings
From the official ICD-10-CM alphabetic index entry “Findings, abnormal, inconclusive, without diagnosis › thyroid (function) (metabolic rate) (scan) (uptake)”. Page updated September 29, 2026.
About coding thyroid findings
The ICD-10-CM code for thyroid findings is R94.6 (Abnormal results of thyroid function studies).
Within R94 (abnormal results of function studies), R94.6 is specifically for abnormal results of thyroid function studies. Related codes cover of central nervous system (R94.0), of peripheral nervous system and special senses (R94.1), pulmonary function studies (R94.2), cardiovascular function studies (R94.3), kidney function studies (R94.4), liver function studies (R94.5), other endocrine function studies (R94.7) and of other organs and systems (R94.8).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 643 (Endocrine Disorders with MCC, relative weight 1.6139), DRG 644 (Endocrine Disorders with CC, relative weight 1.0044) and DRG 645 (Endocrine Disorders without CC/MCC, relative weight 0.7459), in MDC 10 (Endocrine, Nutritional and Metabolic Diseases and Disorders), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
Common questions about thyroid findings ICD-10 codes
What is the ICD-10 code for thyroid findings?
- R94.6 — Abnormal results of thyroid function studies.
Is R94.6 billable?
- Yes. R94.6 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can R94.6 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict R94.6 as a principal diagnosis.
Is R94.6 a CC or MCC?
- No. R94.6 is neither a CC nor an MCC under MS-DRG v44.0.