CPT 70551Radiology

Mri brain stem w/o dye

CPT code 70551 is for an MRI scan of the brainstem performed without using contrast dye (the liquid sometimes injected to make certain tissues show up better on imaging). This is a non-invasive imaging test that uses magnetic fields to create detailed pictures of the lower part of the brain where it connects to the spinal cord.

Showing rates for

National Average

Base Medicare rate

$193.43

This calculator gives a typical-case estimate using standard Medicare modifier rules. Actual payment depends on payer policies, documentation, code-specific CMS status indicators, and locality. Verify before billing.

RVU breakdown

Work RVU

1.48

PE RVU (NF)

4.41

MP RVU

0.09

Total RVU

5.98

Conversion factor: 32.3465 · Source: CMS MPFS RVU25A · Confidence: High

NCCI bundling edits

Loading bundling edits…

Billing tips

Verify prior authorization before scheduling; most Medicare Advantage and commercial payers require pre-approval for brain MRI
Impact: Prevents 100% claim denial; authorization denials can result in complete loss of $193.43 payment plus appeal costs
Confirm the anatomic area is specifically brainstem; if entire brain is imaged, use 70552/70553 instead to avoid downcoding
Impact: Using 70552 (whole brain without contrast) may reimburse similarly but accurately reflects work performed and prevents compliance issues
Append modifier 26 when radiologist only interprets images performed at different facility; ensure split billing agreement exists
Impact: Professional component typically represents 30-40% of total payment; incorrect billing results in overpayment recoupment
Document medical necessity clearly linking symptoms to brainstem pathology; generic 'headache' often triggers denials for targeted brainstem MRI
Impact: Medical necessity denials account for 25-35% of MRI claim rejections; specific documentation of brainstem-related symptoms prevents $193.43 loss
Do not bill 70551 with 70552 on same date for same patient unless truly separate sessions with distinct medical necessity for each region
Impact: Bundling edits will deny one code as inclusive; triggers audit risk and potential recoupment of duplicate payment
Ensure contrast administration is documented as not performed; if contrast was given, 70551 will be denied and 70552 should have been billed
Impact: Incorrect contrast coding results in claim denial and rebilling delay of 30-60 days; may require contrast administration documentation review

Live Field Datano reports yet

Real billers contribute denial patterns and appeal strategies for this code. Once 5+ reports come in, you’ll see live aggregated data here — the only place this exists, free.

Working with CPT 70551?

Get the free Revenue Protection Toolkit — the denial triggers, modifier pitfalls, and bundling conflicts that quietly cost you reimbursement. Instant download.

Help build the field knowledge

MedPayIQ gets smarter as billers contribute. If you've had this code denied, share what happened so others learn from it. Anonymous, no patient info.

Related actions

Frequently asked questions

What is the Medicare reimbursement rate for CPT 70551 in 2025?

The 2025 Medicare national average payment for CPT 70551 is $193.43 for both facility and non-facility settings. This rate is based on 5.98 total RVUs (1.48 work RVU, 4.41 practice expense RVU, 0.09 malpractice RVU) multiplied by the 2025 conversion factor of 32.3465.

What is the difference between CPT 70551 and 70552?

CPT 70551 is specifically for MRI of the brainstem without contrast, while 70552 represents MRI of the entire brain without contrast. Code 70552 includes broader brain imaging beyond just the brainstem region and is used when comprehensive brain evaluation is performed rather than a targeted brainstem study.

Does CPT 70551 require prior authorization from Medicare or insurance?

Traditional Medicare does not universally require prior authorization for 70551, but many Medicare Advantage plans and commercial insurers do require pre-approval for all brain MRI studies. Always verify authorization requirements with the specific payer before scheduling to avoid claim denials.

Can you bill CPT 70551 and 70553 together on the same date of service?

Generally no. CPT 70551 (brainstem without contrast) and 70553 (brain with and without contrast) should not typically be billed together as 70553 includes brain imaging with multiple sequences. Billing both together will likely trigger bundling edits unless documentation clearly demonstrates separate medical necessity for distinct examinations of different anatomic areas.

What diagnosis codes support medical necessity for CPT 70551?

Diagnosis codes that support brainstem-specific imaging include brainstem stroke (I61.3, I63.5), brainstem tumors (D33.1, C71.7), multiple sclerosis with brainstem involvement (G35), vertigo and balance disorders (H81.x, R42), cranial nerve disorders (G50-G52), and ataxia (R27.0). Generic headache codes alone may not support medical necessity for targeted brainstem imaging.

How many RVUs is CPT code 70551 worth in 2025?

CPT 70551 has a total of 5.98 RVUs in 2025, consisting of 1.48 work RVUs, 4.41 practice expense RVUs (both facility and non-facility), and 0.09 malpractice RVUs according to the CMS Physician Fee Schedule.

What modifiers are commonly used with CPT 70551?

The most common modifiers for 70551 are modifier 26 (professional component only when radiologist bills separately from facility), modifier TC (technical component only when facility bills equipment/tech services), modifier 59 (distinct procedural service when billed with other imaging), and modifier 76 (repeat procedure by same physician on same day).