CPT 72200Radiology

X-ray exam si joints

CPT code 72200 covers an x-ray examination of the sacroiliac (SI) joints, which are the joints connecting the base of your spine (sacrum) to your pelvis. This imaging helps doctors diagnose pain, inflammation, arthritis, or injury in the lower back and pelvic region.

Showing rates for

National Average

Base Medicare rate

$32.67

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

0.17

PE RVU (NF)

0.82

MP RVU

0.02

Total RVU

1.01

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

NCCI bundling edits

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Billing tips

Document bilateral imaging even when unilateral symptoms present, as standard SI joint x-ray protocol includes comparison views of both joints
Impact: Prevents downcoding or denial for incomplete study; maintains full $32.67 reimbursement versus partial payment for single view
Verify that the ordering physician has documented specific clinical indication beyond 'low back pain' - include details such as suspected sacroiliitis, spondyloarthropathy, or post-traumatic evaluation
Impact: Reduces medical necessity denials by approximately 35-40% based on audit patterns for imaging codes
When performed in facility setting, ensure proper place of service code (22 for outpatient hospital, 11 for office) as this affects patient cost-sharing even though Medicare pays identical $32.67 rate
Impact: Incorrect POS codes trigger claim rejections and delayed payment requiring resubmission
Do not bill 72200 with comprehensive spine x-rays (72020, 72069-72074) on same date without modifier 59 and distinct documentation
Impact: Bundling edits will deny 72200 as inclusive; proper modifier use recovers the $32.67 payment
For workers' compensation and auto injury cases, obtain prior authorization before performing study as many carriers require pre-certification for imaging
Impact: Retroactive denials for lack of authorization result in 100% payment loss and difficulty collecting from patient
Ensure radiology report specifically mentions SI joints and doesn't default to generic lumbosacral spine language, as vague documentation triggers audits
Clear SI joint-specific interpretation reduces post-payment audit risk and protects against recoupment of the reimbursement

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Frequently asked questions

What is the Medicare reimbursement rate for CPT 72200 in 2025?

The 2025 Medicare national average reimbursement rate for CPT 72200 is $32.67 for both facility and non-facility settings. This is based on 1.01 total RVUs (0.17 work RVU, 0.82 PE RVU, 0.02 MP RVU) multiplied by the 2025 conversion factor of 32.3465.

Can CPT 72200 be billed with lumbar spine x-rays on the same day?

Yes, but you must append modifier 59 to CPT 72200 and document distinct clinical indications for both studies. The SI joints and lumbar spine are separate anatomical areas, but without proper modifier and documentation showing separate medical necessity, the claim will be denied as bundled or duplicate service.

What diagnosis codes support medical necessity for CPT 72200?

Common supporting ICD-10 codes include M46.1 (sacroiliitis), M45.0-M45.9 (ankylosing spondylitis), M53.3 (sacrococcygeal disorders), S33.2XXA (dislocation of sacroiliac joint), and S32.1XXA (fracture of sacrum). General low back pain codes like M54.5 may trigger medical necessity denials without additional clinical documentation.

Do I need to use RT or LT modifiers when billing CPT 72200?

Generally not required for 72200 as the standard examination includes bilateral SI joint views for comparison purposes. However, if imaging is truly limited to one side only due to clinical circumstances, using RT or LT modifiers ensures accurate documentation. Most payers accept 72200 without laterality modifiers as it's inherently a bilateral study.

How often can CPT 72200 be billed for the same patient?

Medicare and most commercial payers don't have specific frequency limits for 72200, but medical necessity must be established for each occurrence. Repeat imaging within 6-12 months typically requires documentation of interval symptom change, new trauma, treatment monitoring, or progressive disease assessment to avoid denial.

What is the difference between CPT 72200 and 72202?

CPT 72200 covers x-ray examination of the SI joints specifically, while 72202 covers x-ray of the sacrum and coccyx. These are distinct anatomical structures and separate billable services when both areas require evaluation, though documentation must support medical necessity for both studies if performed same day.

Should I bill CPT 72200 with modifier 26 or TC in a hospital setting?

In hospital outpatient departments, the facility typically bills the technical component (TC modifier) for equipment and staff, while the radiologist bills the professional component (26 modifier) for interpretation. If you're billing the complete service (global), don't use either modifier. Split billing requires coordination to ensure both components are submitted without duplication.