21 CFR § 900.20 - Scope.

---
identifier: "/us/cfr/t21/s900.20"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "21 CFR § 900.20 - Scope."
title_number: 21
title_name: "Food and Drugs"
section_number: "900.20"
section_name: "Scope."
chapter_name: "FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES"
subchapter_number: "I"
subchapter_name: "MAMMOGRAPHY QUALITY STANDARDS ACT"
part_number: "900"
part_name: "MAMMOGRAPHY"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "21 U.S.C. 360i, 360nn, 374(e); 42 U.S.C. 263b."
regulatory_source: "62 FR 55976, Oct. 28, 1997, unless otherwise noted. Republished and corrected at 62 FR 60614, Nov. 10, 1997."
cfr_part: "900"
---


# 900.20 Scope.

The regulations set forth in this part implement the Mammography Quality Standards Act (MQSA) (42 U.S.C. 263b). Subpart C of this part establishes procedures whereby a State can apply to become a FDA-approved certification agency to certify facilities within the State to perform mammography services. Subpart C of this part further establishes requirements and standards for State certification agencies to ensure that all mammography facilities under their jurisdiction are adequately and consistently evaluated for compliance with quality standards at least as stringent as the national quality standards established by FDA.