CPT code 38228: CAR T-cell administration, autologous cells2026 Medicare rate & RVUs in Hawaii, Guam, HI

In Hawaii, Guam, HI, Medicare pays $345.22 for 38228 in the office and $153.06 when it’s performed in a hospital or facility.

Check a contract rate as a % of Medicare · 38228 nationwide

Medicare allowed amount for participating (non-QP) physicians, before deductible, coinsurance and claim adjustments. Not a patient’s bill or a hospital charge.

What 38228 covers

This code identifies the administration step of autologous chimeric antigen receptor (CAR) T-cell therapy. A patient’s T lymphocytes are collected and modified for treatment, then the resulting cell product is administered back to that patient. Hematologists, oncologists, and other clinicians involved in cellular therapy typically oversee the infusion in a hospital or specialized treatment setting. The code is specific to CAR T-cell administration, not conventional chemotherapy or hematopoietic stem-cell transplantation.

Select the code for the actual administration of the autologous CAR T-cell product. Collection and preparation activities occur at different stages and are represented by separate codes in the CAR T sequence when applicable. Documentation should identify the autologous CAR T product and record that it was administered, including the date and supporting infusion documentation. CMS assigns physician work, practice expense, and malpractice relative values to the service.

This summary was written with AI assistance from CMS physician fee schedule data and checked against the CMS billing rules shown here. Rates on this page come directly from CMS files.

How Hawaii, Guam, HI compares for 38228

Across 109 of 109 payment localities, the office rate for 38228 runs from $285.83 in Arkansas to $420.65 in San Benito County, CA. Hawaii, Guam, HI pays $345.22. The RVUs are the same everywhere; the geographic indexes change the dollars.

Every other payment area

38228 rates by state

Office rate range in each state. Select a state to see its payment localities.

See 38228 in every payment locality

How the 38228 rate is calculated

Each of 38228’s three RVUs is multiplied by a geographic index (GPCI) for the payment locality, added up, and multiplied by the conversion factor. Drag the indexes or enter a ZIP to see what moves the rate.

Payment rules and modifiers for 38228

38228 has no global surgery period, no multiple-procedure, bilateral or assistant-at-surgery adjustment, and no professional/technical split. What changes the payment is where the service happens: the place of service on the claim decides whether Medicare pays the office or the facility rate.

Codes related to 38228

Related codes aren’t interchangeable: bill the code that matches the service performed.

How 38228 has changed in Hawaii, Guam, HI

Price 38228 for an earlier date of service

Where the Hawaii, Guam, HI rate applies

Hawaii, Guam, HI is a Medicare payment area, not a city. Our Census mapping connects it to 163 cities and communities in Hawaii. Some span more than one payment area; confirm with the service ZIP.

• Ahuimanu
• Aiea
• Ainaloa
• Anahola
• Black Sands
• Captain Cook
• Discovery Harbour
• East Honolulu

Browse all communities in Hawaii

Where these rates come from

FeeBase calculates base physician payments from CMS work, practice-expense and malpractice RVUs, adjusted by each locality’s geographic indexes and the conversion factor. Services without a published rate are labeled, never given a made-up amount. Amounts are Medicare allowed amounts before claim adjustments: not a patient’s bill or a commercial rate.

CMS RVU26D · effective Oct 1, 2026 through the day before Jan 1, 2027

Open CMS sourceHow we calculate rates