---
kind: "section"
citation: "42 C.F.R. § 493.857"
title: "42"
number: "493.857"
heading: "Condition: Immunohematology."
url: "https://uscodex.org/cfr/42/493.857"
---

# §493.857. Condition: Immunohematology.


The specialty of immunohematology includes four subspecialties for the purposes of proficiency testing: ABO group and D (Rho) typing; unexpected antibody detection; compatibility testing; and antibody identification.


## Notes

### Source

Source: 57 FR 7146, 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.