# CPT 84155

> Not at a published national rate. CPT 84155 carries status X (statutory exclusion) in the Q3 2017 release. The statutory definition of physician services does not include this item. Treat the blank amount as unpriced, not as $0.

## What it is

Measures the total concentration of protein in a blood sample - overwhelmingly albumin plus the various globulins - run on a chemistry analyzer rather than estimated with a refractometer, and drawn from blood rather than urine or another body fluid. It is a standard line on comprehensive metabolic testing. Taken alone it is a blunt instrument; its usefulness comes from reading it next to albumin, because the gap between the two indicates whether the globulin fraction is raised, as it can be in chronic inflammation, liver disease, or plasma-cell disorders such as myeloma.

## Selected release

- Release: Q3 2017 (2017 C)
- Effective: July 1 – September 30, 2017
- Status indicator: X
- Office (non-facility) national allowed amount: not published
- Facility national allowed amount: not published
- Sequestration: not applied

## RVUs and formula

- Work RVU: not published
- Office (non-facility) practice expense RVU: not published
- Facility practice expense RVU: not published
- Malpractice RVU: not published
- Conversion factor: 35.8887
- Formula: `(work_rvu × work_gpci + pe_rvu × pe_gpci + mp_rvu × mp_gpci) × conversion_factor`

## Source and citation

- Source: Physician relative value file (Q3 2017)
- CMS file: https://www.cms.gov/medicare/medicare-fee-for-service-payment/physicianfeesched/downloads/rvu17c.zip
- Parsed file: PPRRVU17_JULY_V0503.csv, row 13,899
- Canonical page: https://localishealth.com/cpt/84155/2014/B
- Release-specific citation URL: https://localishealth.com/cpt/84155/2017/C
- Last significant update: 2026-08-04T03:07:49+00:00