Imaging · Spine

Radiologic examination of the lumbosacral spine capturing two or three views, used to evaluate the lumbar vertebrae and sacrum for injury, degeneration, or structural abnormality.

Verified May 8, 2026 · 5 sources ↓

Medicare: $40.42
Total RVUs: 1.21
Global, days
Region: Spine

Drawn from CMSAAPCMdclarityLinkedin

Documentation requirements

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

Source · Editorial brief grounded in 5 cited references ↓

Specify the exact number of views obtained (two or three) and name each view (e.g., AP, lateral, oblique)
Document the clinical indication with sufficient specificity — 'low back pain' alone is insufficient; include duration, mechanism, or failed conservative treatment where applicable
Record the ordering provider and the interpreting provider separately when component billing with modifier 26
Include the final radiology report with findings, impression, and radiologist signature before submitting the claim
Note any prior imaging studies and explain why repeat imaging is medically necessary if this is not the patient's first lumbosacral X-ray

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 XS Separate structure

What this code covers

Source · Editorial summary grounded in 5 cited references ↓

CPT 72100 covers a plain-film X-ray of the lumbar and lumbosacral spine with two or three views — typically AP and lateral, sometimes including an oblique. It is the standard first-line imaging order for low back pain, suspected compression fracture, spondylolisthesis screening, or post-trauma evaluation of the lower spine. The code does not include contrast studies, CT, or MRI; those require separate codes.

When the ordering provider and the interpreting radiologist are different entities, component billing applies: append modifier 26 for the professional (interpretation) component and bill the technical component separately without a modifier (or with TC if the payer requires it). Orthopedic practices that own their equipment and employ their own readers bill the global service with no modifier. NCCI bundles 72100 into 72110 (four or more views); you cannot bill both for the same encounter unless a distinct clinical reason exists and a modifier is warranted — the same-day scenario is narrow.

Documentation must specify the number of views obtained and the clinical indication. Audit reviewers flag orders that say only 'low back pain' without laterality, chronicity, or prior treatment context — that information drives medical necessity for payers applying LCD criteria. If the exam is ordered and interpreted by the same physician on the same date as an E/M, the imaging is separately payable; no modifier 25 is needed because the global period for imaging codes is XXX (no global period applies).

RVU & reimbursement

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

Source · CMS Physician Fee Schedule, RVU26A · January 2026

Work RVU	0.21
Practice expense RVU	0.98
Malpractice RVU	0.02
Total RVU	1.21
Medicare national rate	$40.42
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	$40.42
HOPD (APC 5522) Hospital outpatient department	$106.81

Common denial reasons

The recurring reasons claims for CPT 72100 get rejected.

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

Medical necessity not established — diagnosis code too vague or unspecific to meet payer LCD criteria for lumbar imaging
Bundling conflict when 72100 is billed same-day with 72110 without a modifier and a documented distinct clinical rationale
Missing or unsigned radiology interpretation report submitted with the claim
Incorrect component billing — billing global service when the provider only performed the technical or professional component
Duplicate claim submission when both the ordering orthopedic practice and the radiology group bill the global service for the same study

Frequently asked questions

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

01When does 72100 upgrade to 72110?

72110 covers four or more views of the lumbosacral spine. If your tech obtains a minimum of four views in a single session, bill 72110 — not 72100. Do not bill both codes for the same encounter.

02Can I bill 72100 on the same day as an E/M visit?

Yes. The global period for 72100 is XXX, meaning no global surgery rules apply. The imaging is separately payable alongside an E/M without a modifier 25 on the E/M — though some payers still require it, so check individual payer policy.

03How do I split the bill when my office takes the X-ray but a remote radiologist reads it?

Your office bills 72100 with the technical component (no modifier, or TC if the payer requires it). The radiologist bills 72100-26 for the professional interpretation. Together they equal the global fee — do not both bill the global.

04What ICD-10 codes support medical necessity for 72100?

Common supporting diagnosis codes include M54.5x (low back pain by subtype), M47.816 (spondylosis with radiculopathy, lumbar), S32 fracture codes, and M43.16 (spondylolisthesis, lumbar). Payer LCDs vary — confirm against your MAC's active LCD for lumbar spine imaging.

05Is 72100 payable in an ASC?

No ASC payment rate applies to 72100. Plain-film diagnostic X-rays are not on the ASC covered procedures list. Bill through the physician fee schedule or hospital outpatient setting as appropriate.

06Can 72100 and 72110 ever be billed together on the same date?

NCCI bundles 72100 into 72110. Billing both same-day requires a modifier and a documented distinct clinical rationale. In practice, this scenario is rare — if four or more views were obtained, bill 72110 only.

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 number of views obtained, the named projections (AP, lateral, oblique), and the specific clinical indication from dictation — including symptom duration, mechanism of injury, and relevant prior treatment. That detail populates the order and the claim simultaneously, preventing the vague-diagnosis denials that most lumbar spine imaging claims face on first submission.

See how Mira captures CPT 72100 documentation