CPT code 88363: Tissue preparation, archived tissue, each case2026 Medicare rate & RVUs in Riverside, CA

In Riverside, CA, Medicare pays $23.79 for 88363 in the office and $15.74 when it’s performed in a hospital or facility.

Check a contract rate as a % of Medicare · 88363 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 88363 covers

A pathology laboratory prepares tissue that was previously diagnosed and placed in its archive when a clinician later requests molecular testing. The work centers on locating the relevant archived material, preparing the requested tissue, and conveying it to the laboratory that will perform the molecular analysis. A pathologist or pathology laboratory staff may coordinate the preparation as part of diagnostic testing, including when the testing laboratory is separate from the archive holding the tissue.

Report one unit for each qualifying archived case, rather than counting individual slides or tissue pieces as separate cases. The record should identify the archived case, the request for molecular analysis, and the preparation and transfer of tissue. This service covers preparation and conveyance, not the molecular assay itself; code the assay separately when it is performed and separately reportable. CMS assigns this code work, practice-expense, and malpractice relative values, with practice-expense inputs that differ between office and facility settings.

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 Riverside, CA compares for 88363

Across 109 of 109 payment localities, the office rate for 88363 runs from $20.98 in Arkansas to $29.08 in Alaska. Riverside, CA pays $23.79. The RVUs are the same everywhere; the geographic indexes change the dollars.

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88363 rates by state

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

See 88363 in every payment locality

How the 88363 rate is calculated

Each of 88363’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 88363

88363 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 88363

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

How 88363 has changed in Riverside, CA

Price 88363 for an earlier date of service

Where the Riverside, CA rate applies

Riverside, CA is a Medicare payment area, not a city. Our Census mapping connects it to 127 cities and communities in California. Some span more than one payment area; confirm with the service ZIP.

• Ontario
• Riverside
• San Bernardino
• Adelanto
• Aguanga
• Anza
• Apple Valley
• Baker

Browse all communities in California

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