---
kind: "section"
citation: "42 C.F.R. § 493.929"
title: "42"
number: "493.929"
heading: "Chemistry."
url: "https://uscodex.org/cfr/42/493.929"
---

# §493.929. Chemistry.


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](/cfr/42/493.931..493.939.md).


## Notes

### Source

Source: 57 FR 7151, Feb. 28, 1992, unless otherwise noted.

### Authority

Authority: 42 U.S.C. 263a, 1302, 1395x(e), 1395x(s)(3) and (s)(17).

### Source

Source: 55 FR 9576, Mar. 14, 1990, unless otherwise noted.