CPT 77084Radiology

Mri bone marrow blood supply

CPT code 77084 covers MRI imaging to evaluate blood flow to bone marrow, a specialized scan that helps diagnose conditions affecting bone health and blood supply. This test is particularly important for detecting osteonecrosis (bone death due to poor circulation) and other vascular bone disorders.

Showing rates for

National Average

Base Medicare rate

$310.53

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

1.6

PE RVU (NF)

7.9

MP RVU

0.1

Total RVU

9.6

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

NCCI bundling edits

Loading bundling edits…

Billing tips

Document specific clinical indication for bone marrow perfusion assessment rather than general 'bone MRI' - must clearly state evaluation of vascular supply, not just anatomical imaging
Impact: Prevents denial and downcoding to standard MRI codes (73xxx series); preserves full $310.53 reimbursement versus potential $200-250 for anatomical studies
Verify protocol includes perfusion sequences or vascular assessment techniques in imaging report; radiologist must specifically address bone marrow blood supply in interpretation
Impact: Critical for medical necessity justification; missing perfusion assessment documentation causes 60-70% of denials for this code
Bill 77084 only once per anatomical region regardless of number of bones imaged within that region (e.g., multiple hip bones counted as single study)
Impact: Prevents unbundling denials and potential fraud flags; attempting to bill per bone can trigger audit and full claim denial
Include ICD-10 codes specific to vascular bone conditions (M87.x osteonecrosis series, M84.4x pathological fracture) rather than generic joint pain codes
Impact: Improves first-pass approval rate by 40-50%; codes like M25.5xx (joint pain) often trigger medical necessity denial
For bilateral studies, append modifier 50 if payer recognizes it for this code; otherwise bill two line items with RT/LT modifiers
Impact: Ensures payment for both sides; improper bilateral billing loses approximately $310 (50% of bilateral reimbursement)
Separate technical and professional components when different entities provide equipment versus interpretation, using TC and 26 modifiers respectively

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 77084?

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 77084 in 2025?

The 2025 Medicare national average reimbursement for CPT 77084 is $310.53 for both facility and non-facility settings. This rate is based on 9.6 total RVUs (1.6 work RVU + 7.9 PE RVU + 0.1 MP RVU) multiplied by the 2025 conversion factor of 32.3465.

How does CPT 77084 differ from standard bone MRI codes?

CPT 77084 specifically evaluates bone marrow blood supply and perfusion using specialized MRI sequences, while standard bone MRI codes (73xxx series) focus on anatomical structure, soft tissue, and morphology. Code 77084 requires documentation of perfusion assessment techniques and interpretation specifically addressing vascular supply to bone marrow, not just anatomical findings.

Can CPT 77084 be billed with other MRI codes on the same date of service?

Yes, but requires careful documentation and typically modifier 59 to indicate a distinct procedural service. The perfusion study must serve a separate clinical purpose from any anatomical MRI performed, and documentation must clearly justify why both studies were medically necessary. Many payers will bundle without proper modifier and documentation.

What diagnosis codes support medical necessity for CPT 77084?

Primary supporting diagnoses include M87.x series (osteonecrosis), D57.x (sickle cell disorders), M84.4x (pathological fracture), Z94.81 (bone marrow transplant status), and T86.01 (bone marrow transplant rejection). Generic joint pain codes (M25.5xx) often result in denial without additional supporting documentation of vascular risk factors.

How many RVUs is CPT 77084 worth in 2025?

CPT 77084 has 9.6 total RVUs in 2025, consisting of 1.6 work RVUs, 7.9 practice expense RVUs (both facility and non-facility), and 0.1 malpractice RVUs. The relatively high PE RVU reflects the specialized MRI equipment and protocols required for perfusion assessment.

Do I need modifier 26 or TC when billing CPT 77084?

Use modifier 26 when billing only the professional component (radiologist interpretation), or modifier TC for only the technical component (equipment and technologist). If your facility owns the equipment and provides the interpretation, bill the code without modifiers for the global service receiving the full $310.53 reimbursement.

What are common reasons for CPT 77084 claim denials?

The most common denials are: (1) medical necessity not established due to inadequate documentation of vascular risk factors, (2) incorrect coding when documentation supports only anatomical MRI, (3) bundling with same-day anatomical MRI studies, and (4) frequency limitations when repeat studies are performed too soon without documented clinical change.