42 CFR § 414.40 - Coding and ancillary policies.

---
identifier: "/us/cfr/t42/s414.40"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "42 CFR § 414.40 - Coding and ancillary policies."
title_number: 42
title_name: "Public Health"
section_number: "414.40"
section_name: "Coding and ancillary policies."
chapter_name: "CENTERS FOR MEDICARE & MEDICAID SERVICES, DEPARTMENT OF HEALTH AND HUMAN SERVICES"
subchapter_number: "B"
subchapter_name: "MEDICARE PROGRAM"
part_number: "414"
part_name: "PAYMENT FOR PART B MEDICAL AND OTHER HEALTH SERVICES"
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, 1395hh, and 1395rr(b)(l)."
regulatory_source: "55 FR 23441, June 8, 1990, unless otherwise noted."
cfr_part: "414"
---


# 414.40 Coding and ancillary policies.

(a) *General rule.* CMS establishes uniform national definitions of services, codes to represent services, and payment modifiers to the codes.

(b) *Specific types of policies.* CMS establishes uniform national ancillary policies necessary to implement the fee schedule for physician services. These include, but are not limited to, the following policies:

(1) Global surgery policy (for example, post- and pre-operative periods and services, and intra-operative services).

(2) Professional and technical components (for example, payment for services, such as an EEG, which typically comprise a technical component (the taking of the test) and a professional component (the interpretation)).

(3) Payment modifiers (for example, assistant-at-surgery, multiple surgery, bilateral surgery, split surgical global services, team surgery, and unusual services).