Imaging · Spine

Non-contrast MRI of the lumbar spine used to evaluate disc pathology, spinal stenosis, nerve root compression, and other structural abnormalities without administration of contrast material.

Verified May 8, 2026 · 5 sources ↓

Medicare: $191.72
Total RVUs: 5.74
Global, days
Region: Spine

Drawn from CMSProviders

Documentation requirements

What must appear in the operative or office note to support the claim.

Source · Editorial brief grounded in 5 cited references ↓

Clinical indication documented in the ordering note — specify the symptom or diagnosis driving the study (e.g., radiculopathy, neurogenic claudication, disc herniation).
Physical examination findings supporting imaging, including neurological deficits, dermatomal patterns, or positive straight-leg raise.
Conservative treatment history for non-emergent cases — document type, duration, and response to prior treatment (typically four or more weeks).
Confirmation that no contrast was administered — operative or procedure note must specify 'without contrast' to match the code billed.
ICD-10 diagnosis code(s) linked to the order that align with payer medical necessity criteria for lumbar MRI.
Ordering provider credentials and NPI documented on the order, particularly for IDTF billing where the ordering physician identity is required by Medicare.

Applicable modifiers

Modifiers commonly billed with this code.

Source · AMA CPT modifier descriptors · CMS NCCI Policy Manual

26 Professional component 52 Reduced services 59 Distinct service 76 Repeat, same physician 77 Repeat, another physician

What this code covers

Source · Editorial summary grounded in 5 cited references ↓

72148 covers a non-contrast MRI of the lumbar spine, including the lumbosacral region. It's the default code when no gadolinium or other contrast agent is administered. If contrast is added, you need 72149 (with contrast only) or 72158 (without and with contrast) — not 72148 stacked with a contrast add-on. NCCI edits prohibit billing 72149 alongside 72148 with a modifier bypass; use 72158 when both phases are performed at the same encounter.

Medicare coverage is conditional. Medical necessity must be supported by documentation of clinical indication, relevant exam findings, and — for non-emergent presentations — evidence that conservative treatment was attempted for at least four weeks before imaging. Many commercial payers follow similar criteria; Blue Advantage explicitly codifies the four-week conservative care requirement in their lumbar MRI policy.

Split billing between the professional and technical components is common. Radiologists reading studies at a hospital or IDTF bill modifier 26 for interpretation only. The facility bills the technical component (TC). A freestanding imaging center or practice that owns equipment and employs technologists bills the global (no modifier) and captures both components in one claim.

RVU & reimbursement

Component RVUs and Medicare national rate. Actual payment varies by GPCI locality.

Source · CMS Physician Fee Schedule, RVU26A · January 2026

Work RVU	1.44
Practice expense RVU	4.2
Malpractice RVU	0.1
Total RVU	5.74
Medicare national rate	$191.72
Global period	days

Payment by site of service

Medicare pays different rates by setting. HOPD typically pays substantially more than ASC for the same procedure.

Source · CMS OPPS Addendum B·ASC HCPCS payment rates·2026

Setting	Medicare rate (national)
Office (PFS non-facility) Procedure performed in physician's office	$191.72
HOPD (APC 5523) Hospital outpatient department	$243.77

Common denial reasons

The recurring reasons claims for CPT 72148 get rejected.

Source · Editorial brief grounded in CMS NCCI edits, AAOS coding appeals, and cited references ↓

Medical necessity not established — insufficient documentation of conservative treatment failure before ordering imaging for non-emergent low back pain.
Code mismatch with contrast use — billing 72148 when contrast was administered, or when both non-contrast and contrast phases were performed (should be 72158).
Missing or invalid ordering physician information on IDTF claims — Medicare requires the ordering provider's NPI and documentation of the clinical indication.
Duplicate billing — 72148 and 72149 billed together on the same date; NCCI edits do not allow modifier bypass for this pair.
Incorrect modifier split — billing the global code when the reading radiologist and imaging facility are separate entities, or applying modifier 26 when the facility owns the equipment and employs staff.

Frequently asked questions

Source · Generated from the editorial pipeline, verified against 5 cited references ↓

01When should I use 72158 instead of 72148?

Use 72158 when both non-contrast and post-contrast sequences are performed at the same encounter. Billing 72148 and 72149 together is blocked by NCCI edits — modifier bypass is not allowed for that pair.

02Does 72148 require a prior authorization?

Most commercial payers and Medicare Advantage plans require prior auth for non-emergent lumbar MRI. Original Medicare does not require prior authorization but does enforce medical necessity review. Verify by payer before scheduling.

03What's the correct billing approach when a radiologist reads a study at a hospital?

The radiologist bills 72148-26 for the professional interpretation. The hospital bills the technical component separately. Neither entity bills the global code in that scenario.

04How do I document that conservative care was completed before ordering the MRI?

State the specific therapy attempted (physical therapy, NSAIDs, chiropractic), the start date, the duration, and the patient's response. 'Failed conservative treatment' alone is insufficient — auditors want specifics.

05Can 72148 be billed same-day with an E&M visit by the ordering orthopedic surgeon?

Yes, if the surgeon owns the imaging equipment and bills globally. The E&M and the MRI are distinct services. No modifier is needed on the MRI itself, though the E&M may need modifier 25 if decision-making and imaging occur at the same encounter and the payer flags it.

06Is 72148 covered for post-operative surveillance after lumbar fusion?

Coverage depends on clinical indication. Post-op imaging for new or changed symptoms, hardware evaluation, or suspected complications is generally covered when medical necessity is documented. Routine surveillance imaging without clinical change is frequently denied.

Sources & references

Editorial content was developed using the following public sources. Last verified May 8, 2026.

Mira AI Scribe

Mira's AI scribe captures the clinical indication from dictation — radiculopathy pattern, neurological findings, straight-leg raise results, and duration of conservative treatment — and flags when the four-week conservative care threshold has not been documented. That prevents the most common denial on lumbar MRI claims: ordering without documented medical necessity. The scribe also records whether contrast was used, keeping 72148, 72149, and 72158 from being miscoded against each other.

See how Mira captures CPT 72148 documentation