42 CFR § 407.57 - Part B-ID benefit enrollment.

---
identifier: "/us/cfr/t42/s407.57"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "42 CFR § 407.57 - Part B-ID benefit enrollment."
title_number: 42
title_name: "Public Health"
section_number: "407.57"
section_name: "Part B-ID benefit enrollment."
chapter_name: "CENTERS FOR MEDICARE & MEDICAID SERVICES, DEPARTMENT OF HEALTH AND HUMAN SERVICES"
subchapter_number: "B"
subchapter_name: "MEDICARE PROGRAM"
part_number: "407"
part_name: "SUPPLEMENTARY MEDICAL INSURANCE (SMI) ENROLLMENT AND ENTITLEMENT"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "42 U.S.C. 1302, 1395p, 1395q, and 1395hh."
regulatory_source: "53 FR 47204, Nov. 22, 1988, unless otherwise noted."
cfr_part: "407"
---


# 407.57 Part B-ID benefit enrollment.

(a) *Deemed enrollment.* An individual whose Part A entitlement ends in accordance with § 406.13(f)(2) of this subchapter on or after January 1, 2023, is deemed to have enrolled into the Part B-ID benefit effective the first day of the month in which the individual first satisfies § 407.55, provided he or she provides the attestation required under § 407.59 prior to the termination of their Part A benefits.

(b) *Individual enrollment.* An individual whose Part A entitlement ends in accordance with § 406.13(f)(2) of this subchapter, and who meets the requirements of § 407.55 and provides the attestation required under § 407.59, may enroll in the Part B-ID benefit under the following conditions:

(1) If the individual's entitlement ends prior to January 1, 2023, he or she may enroll in the Part B-ID benefit beginning on October 1, 2022.

(2) If individual's entitlement ends on or after January 1, 2023, the individual may enroll at any time after their entitlement ends.

(c) *Reenrollment.* An individual who had previously enrolled in the Part B-ID benefit, but terminated that benefit, can reenroll at any time, provided the individual meets the requirements of § 407.55 and provides the attestation required under § 407.59.

(d) *Attestation.* To enroll in the Part B-ID benefit, an individual must submit the required attestation as described in § 407.59.

(e) *Entitlement date.* The entitlement to the Part B-ID benefit will start as follows:

(1) For enrollments provided under paragraph (a) of this section, entitlement is effective the month Part A benefits are terminated.

(2) For enrollments provided under paragraphs (b) and (c) of this section, the Part B-ID benefit is effective the month following the month in which the individual provides the attestation required in § 407.59.

(3) *Exception.* Enrollments submitted October 1, 2022 through December 31, 2022, are effective January 1, 2023.