# CPT 88360

> Medicare paid $124.92 for CPT 88360 in the office (non-facility) setting and $124.92 in a facility under the Q1 2021 Physician Fee Schedule, effective January 2021. These are the national allowed amounts before the ~2% sequestration cut and before locality (GPCI) adjustment. This is a 1.9% decrease from the previous quarter.

## What it is

The pathologist's measured scoring of an immunohistochemistry stain on a tumor, where the answer needs to be a graded result rather than simply present or absent. Rather than reporting that a marker stained, the pathologist estimates how strongly and in what proportion of tumor cells it stained, because treatment decisions depend on the degree. Hormone receptors and HER2 in breast cancer, and proliferation markers, are the usual subjects. This version is the one scored by a pathologist reading the slide directly; scoring done with computer-assisted image analysis is reported under a separate code.

## Selected release

- Release: Q1 2021 (2021 A)
- Effective: January 1 – March 31, 2021
- Status indicator: A
- Office (non-facility) national allowed amount: $124.92
- Facility national allowed amount: $124.92
- Sequestration: not applied

## RVUs and formula

- Work RVU: 0.85
- Office (non-facility) practice expense RVU: 2.71
- Facility practice expense RVU: 2.71
- Malpractice RVU: 0.02
- Conversion factor: 34.8931
- Formula: `(work_rvu × work_gpci + pe_rvu × pe_gpci + mp_rvu × mp_gpci) × conversion_factor`

## Source and citation

- Source: Physician relative value file (Q1 2021)
- CMS file: https://www.cms.gov/files/zip/rvu21a-updated-01052021.zip
- Parsed file: PPRRVU21_JAN.csv, row 15,516
- Canonical page: https://localishealth.com/cpt/88360/2021/A
- Release-specific citation URL: https://localishealth.com/cpt/88360/2021/A
- Last significant update: 2026-08-04T03:10:16+00:00