1. A. A health information exchange and an electronic health network shall restrict the disclosure of the gender-affirming treatment medical diagnosis codes and current procedural terminology (CPT) codes listed in §B below.

2. B. List of Medical Diagnosis Codes.

   International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) Code	Description
   F64.0	Transsexualism
   F64.1	Dual role transvestism
   F64.2	Gender identity disorder of childhood
   F64.8	Other gender identity disorders
   F64.9	Gender identity disorder, unspecified

Authority: Health-General Article, §4-302.5 Annotated Code of Maryland

Effective date: September 16, 2024 (51:18 Md. R. 809)

Regulation .01B amended effective May 11, 2026 (53:9 Md. R. 413)

Regulation .02B amended effective May 11, 2026 (53:9 Md. R. 413)

Regulation .04B amended effective May 11, 2026 (53:9 Md. R. 413)

Regulation .06 recodified to Regulation .07 effective May 11, 2026 (53:9 Md. R. 413)

Regulation .06 adopted effective May 11, 2026 (53:9 Md. R. 413)