# 42 CFR § 408.3: Definitions

> Federal · Regulations · In force

URL: https://www.frixlaw.com/law-library/statutes/ecfr-42-408.3

## Section

- **Citation:** 42 CFR § 408.3
- **Heading:** Definitions
- **Jurisdiction:** Federal
- **Kind:** Regulations
- **Status:** In force
- **Text as of:** September 22, 2026
- **Source:** Publisher's official text
- **Location:** Title 42—Public Health > CHAPTER IV—CENTERS FOR MEDICARE & MEDICAID SERVICES, DEPARTMENT OF HEALTH AND HUMAN SERVICES > SUBCHAPTER B—MEDICARE PROGRAM > PART 408—PREMIUMS FOR SUPPLEMENTARY MEDICAL INSURANCE > Subpart A—General Provisions

## Text

As used in this part, unless the context indicates otherwise—
Enrollee means an individual who is enrolled in the SMI program under Medicare Part B.
Taxable year means the 12-month period (calendar or fiscal year) for which the individual files his or her income tax return.

## Nearby sections

- [42 CFR § 408.1 § 408.1 Statutory basis.](https://www.frixlaw.com/law-library/statutes/ecfr-42-408.1.md)
- [42 CFR § 408.2 § 408.2 Scope and purpose.](https://www.frixlaw.com/law-library/statutes/ecfr-42-408.2.md)
- [42 CFR § 408.3 § 408.3 Definitions.](https://www.frixlaw.com/law-library/statutes/ecfr-42-408.3.md)
- [42 CFR § 408.4 § 408.4 Payment obligations.](https://www.frixlaw.com/law-library/statutes/ecfr-42-408.4.md)
- [42 CFR § 408.6 § 408.6 Methods and priorities for payment.](https://www.frixlaw.com/law-library/statutes/ecfr-42-408.6.md)
- [42 CFR § 408.8 § 408.8 Grace period and termination date.](https://www.frixlaw.com/law-library/statutes/ecfr-42-408.8.md)
- [42 CFR § 408.10 § 408.10 Claim for monthly benefits pending concurrently with request for SMI enrollment.](https://www.frixlaw.com/law-library/statutes/ecfr-42-408.10.md)
- [42 CFR § 408.20 § 408.20 Monthly premiums.](https://www.frixlaw.com/law-library/statutes/ecfr-42-408.20.md)
- [42 CFR § 408.21 § 408.21 Reduction in Medicare Part B premium as an additional benefit under Medicare + Choice plans.](https://www.frixlaw.com/law-library/statutes/ecfr-42-408.21.md)
- [42 CFR § 408.22 § 408.22 Increased premiums for late enrollment and for reenrollment.](https://www.frixlaw.com/law-library/statutes/ecfr-42-408.22.md)
- [42 CFR § 408.24 § 408.24 Individuals who enrolled or reenrolled before April 1, 1981 or after September 30, 1981.](https://www.frixlaw.com/law-library/statutes/ecfr-42-408.24.md)
- [42 CFR § 408.25 § 408.25 Individuals who enrolled or reenrolled between April 1 and September 30, 1981.](https://www.frixlaw.com/law-library/statutes/ecfr-42-408.25.md)
- [42 CFR § 408.26 § 408.26 Examples.](https://www.frixlaw.com/law-library/statutes/ecfr-42-408.26.md)
- [42 CFR § 408.27 § 408.27 Rounding the monthly premium.](https://www.frixlaw.com/law-library/statutes/ecfr-42-408.27.md)

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Source: Frix Law Library, https://www.frixlaw.com/law-library/statutes/ecfr-42-408.3. Check the current official text before relying on it. Not legal advice.