CPT code 88373: ISH analysis, computer-assisted morphometry2026 Medicare rate & RVUs in Connecticut

In Connecticut, Medicare pays $67.31 for 88373 in the office.

Check a contract rate as a % of Medicare · 88373 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 88373 covers

This service uses computer-assisted image analysis to quantify or semi-quantify findings from in situ hybridization (ISH) in a tissue specimen. A pathologist or qualified laboratory professional typically evaluates stained slides with imaging equipment and analysis software. A familiar clinical setting is assessment of HER2-related signals in breast carcinoma tissue; the method applies when the requested ISH findings require morphometric measurement rather than a qualitative read alone.

Select the service based on the computer-assisted morphometric method and the documented assay and specimen. The record should identify the tissue examined, probe or assay, analysis method, measured findings, and resulting interpretation. CMS treats 88373 as an add-on code: report it only with a primary procedure, and payment falls within that procedure’s global period. The service has separately priced professional and technical components: modifier 26 identifies interpretation, modifier TC identifies equipment and staff, and no component modifier represents the global 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 Connecticut compares for 88373

Across 109 of 109 payment localities, the office rate for 88373 runs from $57.08 in Arkansas to $84.89 in San Benito County, CA. Connecticut pays $67.31. The RVUs are the same everywhere; the geographic indexes change the dollars.

Every other payment area

88373 rates by state

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

See 88373 in every payment locality

How the 88373 rate is calculated

Each of 88373’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 88373

The CMS indicators that decide how 88373 is paid alongside other services.

What modifiers do to the payment

When to use modifier 26

Codes related to 88373

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

How 88373 has changed in Connecticut

Price 88373 for an earlier date of service

Where the Connecticut rate applies

Connecticut is a Medicare payment area, not a city. Our Census mapping connects it to 215 cities and communities in Connecticut. Some span more than one payment area; confirm with the service ZIP.

• Ansonia
• Ball Pond
• Baltic
• Bantam
• Bethel
• Bethlehem Village
• Bigelow Corners
• Blue Hills

Browse all communities in Connecticut

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