Limited-area bone scintigraphy using an injected radionuclide to image a single bone or joint region for diagnosis of fractures, infection, or osseous disease.

Documentation requirements

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

Source · Editorial brief grounded in 6 cited references ↓

• Specify the exact anatomic area imaged — a vague 'limited area' notation without naming the bone or joint is an audit flag.
• Radiopharmaceutical administered: name, dose, route, and time of injection must appear in the report or procedure record.
• Clinical indication tying the limited-area scan to the diagnosis (e.g., occult fracture, osteomyelitis, AVN, suspected neoplasm) — required to support medical necessity for payer review.
• Interpreting physician's final signed report with correlation to prior imaging studies (satisfies QPP Measure 147 numerator requirements).
• If billing professional component only (modifier 26), document that the physician personally reviewed images and authored the interpretation — not just a co-signature on a tech note.
• For three-phase studies, confirm whether vascular flow imaging was performed; if so, 78315 is correct and 78300 should not be billed for that encounter.

Applicable modifiers

Modifiers commonly billed with this code.

Source · AMA CPT modifier descriptors · CMS NCCI Policy Manual

What this code covers

Source · Editorial summary grounded in 6 cited references ↓

RVU & reimbursement

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

Source · CMS Physician Fee Schedule, RVU26A · January 2026

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

Common denial reasons

The recurring reasons claims for CPT 78300 get rejected.

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

• Upcoding to 78306 (whole body) or 78315 (three-phase) when the scan was limited area — payers cross-reference operative or imaging reports to verify scope.
• Missing or inadequate medical necessity documentation: payers require a diagnosis that justifies nuclear scintigraphy over standard radiographs, and a generic 'bone pain' ICD-10 without clinical context is frequently insufficient.
• Bundling denial when 78300 and a SPECT code are billed together for the same limited anatomic area on the same date — NCCI policy treats them as mutually exclusive without a valid modifier rationale.
• TC and 26 billed by the same provider on the same claim instead of the global code, or global billed by a provider who only performed one component.
• Modifier 26 claims denied at facilities that bill under a global arrangement — verify the professional/technical split billing arrangement with the facility before submitting.