---
kind: "section"
citation: "45 C.F.R. § 153.720"
title: "45"
number: "153.720"
heading: "Establishment and usage of masked enrollee identification numbers."
url: "https://uscodex.org/cfr/45/153.720"
---

# §153.720. Establishment and usage of masked enrollee identification numbers.

- (a) **Enrollee identification numbers.** An issuer of a risk adjustment covered plan or a reinsurance-eligible plan in a State in which HHS is operating the risk adjustment or reinsurance program, as applicable, must—
  - (1) Establish a unique masked enrollee identification number for each enrollee; and
  - (2) Maintain the same masked enrollee identification number for an enrollee across enrollments or plans within the issuer, within the State, during a benefit year.
- (b) **Prohibition on personally identifiable information.** An issuer of a risk adjustment covered plan or a reinsurance-eligible plan in a State in which HHS is operating the risk adjustment or reinsurance program on behalf of the State, as applicable, may not—
  - (1) Include enrollee's personally identifiable information in the masked enrollee identification number; or
  - (2) **Use the same masked enrollee identification number for different enrollees enrolled with the issuer.**

## Notes

### Source

Source: 78 FR 15531, Mar. 11, 2013, unless otherwise noted.

### Authority

Authority: 42 U.S.C. 18031, 18041, and 18061 through 18063.

### Source

Source: 77 FR 17245, Mar. 23, 2012, unless otherwise noted.