# CPT 21100

> The national PFS baseline was $743.75 for CPT 21100 in the Office (non-facility) setting and $423.00 in a facility under the Q4 2018 Physician Fee Schedule, effective October 2018. These are the national allowed amounts before locality (GPCI) adjustment; sequestration is excluded. Across payment localities, the office amount is $654.98–$933.42 and the facility amount is $375.92–$526.07. This amount has been unchanged since Q1 2018, when it decreased 13.3%.

## Selected release

- Release: Q4 2018 (2018 D)
- Effective: October 1 – December 31, 2018
- Status indicator: A
- Office (non-facility) national allowed amount: $743.75
- Facility national allowed amount: $423.00
- Sequestration: not applied

## RVUs and formula

- Work RVU: 4.73
- Office (non-facility) practice expense RVU: 15.14
- Facility practice expense RVU: 6.23
- Malpractice RVU: 0.79
- Conversion factor: 35.9996
- Formula: `(work_rvu × work_gpci + pe_rvu × pe_gpci + mp_rvu × mp_gpci) × conversion_factor`

## Source and citation

- Source: Physician relative value file (Q4 2018)
- CMS file: https://www.cms.gov/medicare/medicare-fee-for-service-payment/physicianfeesched/downloads/rvu18d.zip
- Parsed file: PPRRVU18_OCT.csv, row 5,859
- Canonical page: https://localishealth.com/cpt/21100/2018/A
- Release-specific citation URL: https://localishealth.com/cpt/21100/2018/D
- Last significant update: 2026-09-14T15:23:14+00:00