CPT code 70558: Functional brain MRI, with contrast2026 Medicare rate & RVUs in Montana

CMS doesn’t publish a rate for 70558 in Montana.

Check a contract rate as a % of Medicare · 70558 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 70558 covers

This service is functional magnetic resonance imaging of the brain performed with contrast material. Functional MRI assesses signal changes associated with brain activity, often while the patient performs tasks that engage functions such as language or movement. Imaging may be part of an evaluation for a brain lesion or before neurosurgery, when clinicians need functional information alongside anatomic imaging. The imaging facility performs the scan, and a qualified physician interprets and reports the findings.

Medicare assigns this code carrier-priced status (C): CMS publishes no national payment, and the Medicare Administrative Contractor sets payment for each claim. The service has a professional component for interpretation and a technical component for equipment and staff. Report modifier 26 for the professional component or TC for the technical component; report the global service without either modifier. This code represents the functional brain MRI performed with contrast, not a contrast agent dose.

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 Montana compares for 70558

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70558 rates by state

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

See 70558 in every payment locality

How the 70558 rate is calculated

Each of 70558’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 70558

The CMS indicators that decide how 70558 is paid alongside other services.

What modifiers do to the payment

When to use modifier 26

Codes related to 70558

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

How 70558 has changed in Montana

Price 70558 for an earlier date of service

Where the Montana rate applies

Montana is a Medicare payment area, not a city. Our Census mapping connects it to 497 cities and communities in Montana. Some span more than one payment area; confirm with the service ZIP.

• Absarokee
• Acton
• Alberton
• Alder
• Alzada
• Amsterdam
• Anaconda-Deer Lodge County
• Antelope

Browse all communities in Montana

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