42 C.F.R. § 493.929 Chemistry.
Title 42 - Public Health
The subspecialties under the specialty of chemistry for which a proficiency testing program may offer proficiency testing are routine chemistry, endocrinology, and toxicology. Specific criteria for these subspecialties are listed in §§493.931 through 493.939.
Title 42: Public Health
PART 493—LABORATORY REQUIREMENTS
Subpart I—Proficiency Testing Programs for Nonwaived Testing
Proficiency Testing Programs by Specialty and Subspecialty
§ 493.929 Chemistry.
