Anesthesiologists Center

Spotlight

Physician Fee Schedule: CY 2026 Final Rule – Learn What's New

CMS issued the CY 2026 Physician Fee Schedule (PFS) final rule that announces final policy changes for Medicare payments under the PFS and other Medicare Part B issues.

See a summary of key provisions effective on or after January 1, 2026.

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Billing / Payment

2026 Anesthesia Conversion Factors (ZIP) - These are the anesthesia conversion factors used to compute allowable amounts for anesthesia services under CPT codes 00100 to 01999.
- The anesthesia base units are unchanged for CY 2026
2025 Anesthesia Conversion Factors (ZIP) (Updated 12/26/2024) - These are the anesthesia conversion factors used to compute allowable amounts for anesthesia services under CPT codes 00100 to 01999.
- The anesthesia base units are unchanged for CY 2025.
2024 Anesthesia Conversion Factors (ZIP) (Updated 03/14/2024) - These are the anesthesia conversion factors used to compute allowable amounts for anesthesia services under CPT codes 00100 to 01999.
- The anesthesia base units are unchanged for CY 2024.
2023 Anesthesia Conversion Factors (ZIP) (Updated 01/06/2023) - These are the anesthesia conversion factors used to compute allowable amounts for anesthesia services under CPT codes 00100 to 01999.
- The anesthesia base units are unchanged for CY 2023
2022 Anesthesia Conversion Factors (ZIP) (updated 12/20/21) - These are the anesthesia conversion factors used to compute allowable amounts for anesthesia services under CPT codes 00100 to 01999.
- 2022 Anesthesia base units by CPT code (ZIP) - These are the anesthesia base units used to compute allowable amounts for anesthesia services under CPT codes 00100 to 01999
2021 Anesthesia Conversion Factors (ZIP) - (Updated 12/29/2020) - These are the anesthesia conversion factors used to compute allowable amounts for anesthesia services under CPT codes 00100 to 01999.
- The anesthesia base units are unchanged for CY 2021.
2020 Anesthesia Conversion Factors (ZIP) - These are the anesthesia conversion factors used to compute allowable amounts for anesthesia services under CPT codes 00100 to 01999.
- The anesthesia base units are unchanged for CY 2020.
2019 Anesthesia Conversion Factors (ZIP) - These are the anesthesia conversion factors used to compute allowable amounts for anesthesia services under CPT codes 00100 to 01999.
- The anesthesia base units are unchanged for CY 2019.
2018 Anesthesia Conversion Factors (ZIP) - These are the anesthesia conversion factors used to compute allowable amounts for anesthesia services under CPT codes 00100 to 01999.
2018 Anesthesia Base Units by CPT Code (ZIP) - These are the anesthesia base units used to compute allowable amounts for anesthesia services under CPT codes 00100 to 01999.
2017 Anesthesia Conversion Factors (ZIP) - These are the anesthesia conversion factors used to compute allowable amounts for anesthesia services under CPT codes 00100 to 01999.
- The anesthesia base units are unchanged for 2017.
2016 Anesthesia Conversion Factors (ZIP) - These are the anesthesia conversion factors used to compute allowable amounts for anesthesia services under CPT codes 00100 to 01999.
- The anesthesia base units are unchanged for 2016.
2015 Anesthesia Conversion Factors (July 1- Dec 31) (ZIP) - These are the anesthesia conversion factors used to compute allowable amounts for anesthesia services under CPT codes 00100 to 01999.
- The anesthesia base units are unchanged for 2015.
2015 Anesthesia Conversion Factors (Jan 1 – June 30) (ZIP) - These are the anesthesia conversion factors used to compute allowable amounts for anesthesia services under CPT codes 00100 to 01999. (Updated 1/6/2015)
- The anesthesia base units are unchanged for 2015.
2014 Anesthesia Conversion Factors (ZIP) - These are the anesthesia conversion factors used to compute allowable amounts for anesthesia services under CPT codes 00100 to 01999. (Updated 1/3/2014)
2014 Anesthesia Base Units by CPT Code (ZIP) - These are the anesthesia base units used to compute allowable amounts for anesthesia services under CPT codes 00100 to 01999.
2013 Anesthesia Conversion Factors (ZIP) - These are the anesthesia conversion factors used to compute allowable amounts for anesthesia services under CPT codes 00100 to 01999. (Updated 12/31/2012)
2013 Anesthesia Base Units by CPT Code (ZIP) - These are the anesthesia base units used to compute allowable amounts for anesthesia services under CPT codes 00100 to 01999.
2012 Anesthesia Conversion Factor 0% Update (ZIP) - These are the anesthesia conversion factors used to compute allowable amounts for anesthesia services under CPT codes 00100 to 01999. (Updated 3/1/12)
2012 Anesthesia Base Units by CPT Code (ZIP) These are the anesthesia base units used to compute allowable amounts for anesthesia services under CPT codes 00100 to 01999.
2011 Anesthesia Base Units by CPT Code (ZIP) These are the anesthesia base units used to compute allowable amounts for anesthesia services under CPT codes 00100 to 01999.
2011 Anesthesia Conversion Factor (ZIP) These are the anesthesia conversion factors used to compute allowable amounts for anesthesia services under CPT codes 00100 to 01999 (updated 4/2/12).
2010 Anesthesia Base Units by CPT Code (ZIP) These are the anesthesia base units used to compute allowable amounts for anesthesia services under CPT codes 00100 to 01999.
2010 Anesthesia Conversion Factor 0% update and 2010 Anesthesia Conversion Factor 2.2% update . These are the anesthesia conversion factors used to compute allowable amounts for anesthesia services under CPT codes 00100 to 01999. - cannot link dynamic list details
2009 Anesthesia Base Units by CPT Code (ZIP) These are the anesthesia base units used to compute allowable amounts for anesthesia services under CPT codes 00100 to 01999.
2009 Anesthesia Conversion Factor (ZIP) These are the anesthesia conversion factors used to compute allowable amounts for anesthesia services under CPT codes 00100 to 01999.

Participation

Title 42 - Public Health, Chapter IV CMS/DHHS: Conditions of Participation - Part 482.52 - Anesthesia Services
Appendix A of the State Operations Manual, pages 31-35 (PDF) - Anesthesia Services -- Appendix A (482.52)
Part 410.69 - Services of a certified registered nurse anesthetist or an anesthesiologist's assistant: Basic rule and definitions.
Pharmaceutical Services - 482.25 (Title 42 - Public Health, Chapter IV CMS/DHHS)
Fourteen states have chosen to opt-out of the CRNA physician supervision regulation -- See Spotlight in the Spotlight for those states.

CMS Manuals & Transmittals

Medicare Claims Processing Manual
Payment for Anesthesiology Services Medicare Claims Processing Manual (Chapter 12; Physician/Nonphysician Practitioners) (PDF) (See Sub-Section K - Anesthesia Claims Claims Modifiers) contains the amount physicians and other providers will receive when providing services to a Medicare beneficiary
Transmittals
Medicare National Correct Coding Initiative (NCCI) Edits

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CMS Regional Offices

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