CPT 72133Radiology

Ct lumbar spine w/o & w/dye

CPT code 72133 covers a CT scan of the lower back (lumbar spine) performed twice: once without contrast dye, then again with contrast dye injected to highlight blood vessels and tissues.

Showing rates for

National Average

Base Medicare rate

$193.76

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

1.27

PE RVU (NF)

4.64

MP RVU

0.08

Total RVU

5.99

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

NCCI bundling edits

Loading bundling edits…

Billing tips

Verify that both pre-contrast and post-contrast sequences were actually performed and documented in the radiology report - if only one phase completed, bill 72131 (without contrast) or 72132 (with contrast) instead
Impact: Prevents $30-50 overpayment recovery and fraud allegations; 72131 reimburses approximately $40 less
Document medical necessity for contrast administration specifically - note why non-contrast study (72131) would be insufficient for diagnosis
Impact: Reduces denial rate by 60-70%; contrast studies face higher scrutiny and require explicit justification
Split bill using 26 and TC modifiers when professional and technical components have different performing entities to maximize compliant reimbursement
Impact: Ensures proper payment allocation; prevents $75-115 payment delays or denials from incorrect billing entity
Check for LCD/NCD coverage requirements in your MAC jurisdiction - many require specific diagnosis codes or failed conservative treatment documentation
Impact: Pre-authorization compliance prevents 100% denial; some MACs require 6-12 weeks conservative care documentation
Never bill 72133 with 72131 or 72132 on same date of service for same anatomical area - this represents unbundling
Impact: Avoids automatic denial and potential $193.76 recoupment plus fraud flags in audit systems
Document contrast type, dosage, route, and patient monitoring in medical record even though not required for code selection - essential for medical necessity and safety compliance
Impact: Protects against medical review denials and malpractice exposure; supports 85-90% appeal success rate

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 72133?

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 difference between CPT 72133 and 72131 or 72132?

CPT 72133 requires imaging both without and with contrast dye (dual-phase protocol), while 72131 is without contrast only and 72132 is with contrast only. Code 72133 reimburses at $193.76, providing comprehensive evaluation but requiring documentation of both imaging phases. Never bill 72133 unless both pre-contrast and post-contrast sequences were actually performed.

How much does Medicare pay for CPT 72133 in 2025?

Medicare pays $193.76 for CPT 72133 in 2025 based on the national average non-facility rate. This represents 5.99 total RVUs multiplied by the 2025 conversion factor of 32.3465. Actual payment may vary by geographic locality and whether performed in facility or non-facility settings, though both rates are identical for this code.

What modifiers are most commonly used with CPT 72133?

Modifier 26 (professional component) and TC (technical component) are most common when splitting billing between radiologist and facility. Modifier 59 is used when performed with other imaging to prevent bundling denials. Modifier 76 applies for same-day repeat procedures, and modifier 52 for reduced services when contrast portion cannot be completed.

Does CPT 72133 require prior authorization?

Most Medicare Advantage plans and commercial payers require prior authorization for CPT 72133 due to its classification as advanced imaging with contrast. Traditional Medicare typically does not require pre-authorization but does enforce LCD coverage requirements. Always verify specific payer requirements before scheduling to avoid denials.

Can you bill CPT 72133 with an MRI of the lumbar spine on the same day?

Yes, but it requires strong medical necessity documentation and typically modifier 59 on one code. You must document why both CT and MRI were necessary (e.g., MRI contraindication requiring CT, or CT for bone detail and MRI for soft tissue). Many payers consider this duplicative and deny without compelling clinical justification.

What diagnosis codes are typically covered for CPT 72133?

Commonly covered ICD-10 codes include M54.5 (low back pain), M51.26 (lumbar disc displacement), C79.51 (secondary malignant neoplasm of bone), M46.26 (lumbar osteomyelitis), and G89.29 (chronic pain). Coverage varies by MAC jurisdiction - check your local LCD for specific requirements. Chronic pain alone often requires documentation of failed conservative treatment.

How many RVUs is CPT code 72133 worth in 2025?

CPT 72133 has 5.99 total RVUs in 2025, consisting of 1.27 work RVUs, 4.64 practice expense RVUs (both facility and non-facility), and 0.08 malpractice RVUs. This RVU value multiplied by the 2025 conversion factor of 32.3465 equals the Medicare payment of $193.76.