CPT code 73070 – Elbow X-ray, 2 views

Key takeaways

CPT code 73070 covers a radiologic examination of the elbow limited to exactly 2 views, with no oblique or stress projections.

Choosing between 73070 and 73080 depends on the view count in the signed radiology report, never on clinical complexity.

The two most common denials are billing 73070 against a 3-view report and pairing -26 with -TC on one line.

Under the 2026 CMS fee schedule, 73070 carries 0.88 total RVU, of which 0.70 is practice expense.

Pabau’s claims management software links the code, modifier, and diagnosis inside the patient record, catching mismatches before submission.

CPT code 73070: Official descriptor and clinical scope

CPT code 73070, as maintained by the American Medical Association’s CPT code set, carries the official descriptor: “Radiologic examination, elbow; 2 views.” The code belongs to the 73000-series musculoskeletal radiology section of the CPT manual. It applies only to plain-film (conventional) X-ray of the elbow joint.

The two views covered are the anteroposterior (AP) and lateral projections. These are the minimum clinically accepted projections for evaluating elbow alignment, joint space, and gross bony architecture. The code does not include fluoroscopy, CT, MRI, or ultrasound of the elbow.

What is and is not included in 73070

• Included: Anteroposterior view of the elbow joint
• Included: Lateral view of the elbow joint
• Included: Interpretation and report by the radiologist when billed globally or with modifier -26
• Not included: Oblique projections (their addition pushes the study to 73080)
• Not included: Stress views or radial head-capitellum projections
• Not included: Forearm imaging (separate code: 73090)
• Not included: Shoulder imaging (separate code: 73030)

CPT 73070 vs CPT 73080: Choosing the right elbow code

CPT 73080 describes a radiologic examination of the elbow with 3 or more views. The selection rule is mechanical. Count the views documented in the signed radiology report. If the report confirms two projections, use 73070. If three or more projections are documented, use 73080. Clinical complexity, fracture severity, and ordering provider specialty are irrelevant to the code selection.

The most common billing error in this pair is upgrading to 73080 because the radiologist added an oblique view at their own discretion. When the order was written for 2 views and a third projection is taken anyway, the documentation must reflect the views actually captured. Always code from the finalized radiology report, not the order.

Related elbow and upper extremity radiology codes

CPT code 73070 sits within the 73000-series, which covers diagnostic radiology for the upper extremity. The same view-count logic runs across the whole section, so the rule you apply here transfers to the wrist, the forearm, and the shoulder. The table below maps the adjacent codes coders encounter most alongside 73070.

Documentation requirements for billing CPT 73070

Every CPT 73070 claim must be supported by four documentation elements. Missing any one of them gives payers grounds for denial on a medical necessity or completeness basis. The order has to precede the study; one created after the fact will not survive an audit.

• Physician order: A written or electronic order from the treating or referring provider. It states the reason for the study and the anatomical site, whether left, right, or bilateral
• Clinical indication / diagnosis: A specific ICD-10-CM diagnosis code supporting medical necessity, linked to the claim
• Radiology report: A finalized, signed report from the interpreting radiologist confirming the number of views taken (must state 2 views to support 73070)
• Ordering provider NPI: The National Provider Identifier of the ordering physician, required on the CMS-1500 claim form in Box 17b

Practices that build charges from a superbill should make sure it captures the ordered view count. It also needs the final view count from the radiology report. A mismatch between the two is the root cause of most 73070 downcoding audits.

Modifiers for CPT code 73070

Modifier selection for CPT code 73070 depends on the billing entity and the laterality of the study. Radiology codes follow global service billing rules. When one entity owns both the equipment and the reading, the code is billed globally with no modifier. When the functions are split, modifiers -26 and -TC apply separately.

One NCCI edit rule matters more than the rest. Modifiers -26 and -TC may never appear on the same claim line for the same code, from the same provider, on the same date. Appending both is a bundling error that triggers an automatic rejection. The global service already encompasses both components, so a genuine split sends each one to its own billing entity on a separate claim.

Medicare reimbursement and RVU values for CPT code 73070

Medicare reimbursement for CPT code 73070 is set annually through the CMS Medicare Physician Fee Schedule (MPFS). Rates are expressed in relative value units (RVUs), then converted to dollars using the annual conversion factor. Geographic Practice Cost Indices (GPCI) then adjust that figure for each locality. The 2026 values below come from the CMS Physician Fee Schedule lookup tool. Rates change with each Final Rule, so verify them there before you rely on them.

Those four numbers are worth reading as proportions rather than as a lookup. Practice expense makes up roughly four-fifths of what the code pays. That is why the technical side of a split-billed elbow X-ray is worth more than the read.

Splitting the service reassigns those components rather than adding to them. Modifier -26 carries the work RVU and the professional share of practice expense. Modifier -TC carries the technical practice expense and no work RVU. Pull the exact -26 and -TC values for your own locality before quoting either figure to a patient.

The FastRVU 2026 lookup tool provides locality-specific RVU calculations if your practice needs to verify rates by GPCI area before submitting.

Common claim denial reasons for CPT 73070

Most 73070 denials fall into six patterns, and each one can be stopped at charge entry. Effective denial management workflows address these root causes before the claim goes out, not after the remittance comes back.

• View count mismatch: The claim states 73070 (2 views), but the signed radiology report documents 3 or more views. Payers cross-check the report. Fix: Always code from the finalized report.
• Missing physician order: No order in the chart preceding the date of service. Some payers deny outright; others downadjust. Fix: Capture the order before the technologist images the patient.
• Simultaneous -26 and -TC modifiers: Appending both modifiers to the same claim line violates NCCI bundling rules. Fix: Route each component to the correct billing entity on a separate claim line.
• Duplicate billing with 73080: Both 73070 and 73080 submitted for the same patient, same date, same elbow. Fix: Enforce a code-exclusivity rule in the charge entry system.
• Missing medical necessity diagnosis: The ICD-10 code on the claim does not support a plain-film elbow study under the payer’s local coverage determination (LCD). Fix: Link a specific, documented diagnosis rather than a symptom code alone.
• Bilateral billing errors: Medicare and most commercial payers handle bilateral radiology differently. Medicare typically requires 73070 billed twice, once with -LT and once with -RT, rather than one line with modifier -50. Fix: Confirm the payer’s bilateral rule before submission.

Submitting a clean claim the first time eliminates rework costs. For 73070, that means confirming the radiology report view count, the modifier pairing logic, and the paired ICD-10 code before the claim leaves the practice.

ICD-10 diagnosis codes commonly paired with 73070

The ICD-10-CM diagnosis code on a 73070 claim establishes medical necessity. Payers evaluate whether the coded diagnosis logically warrants an elbow X-ray. Choosing a vague symptom code when a specific diagnosis is documented is a compliance risk. Choosing a specific diagnosis the record does not support is a fraud risk. Browse the wider ICD-10-CM code set when the documented diagnosis falls outside the pairings below.

For fracture follow-up visits, confirm whether a new study is being ordered or whether the prior study is being re-read. The diagnosis on the claim has to be supported by the clinical documentation, not selected because it pays.

Payer-specific considerations and prior authorization

Medicare does not require prior authorization for plain-film diagnostic X-rays under the standard Medicare Physician Fee Schedule. Medical necessity documentation requirements still apply and are subject to audit. This is consistent with CMS coding and billing guidance under Part B. Commercial payer rules vary significantly by plan and state.

• Medicare: No prior authorization for 73070. Medical necessity supported by the paired ICD-10 diagnosis and radiology report. Subject to LCD-based coverage determinations where applicable.
• Commercial payers: Most major commercial insurers do not require prior authorization for plain-film elbow X-ray. Some high-deductible and managed-care plans require notification or referral. Verify each payer’s policy before the date of service.
• Medicaid: Rules vary by state. Some state Medicaid programs require a referral from a primary care provider before specialty-ordered diagnostic imaging. Check your state Medicaid fee schedule, which often reimburses radiology below Medicare rates.
• Workers’ compensation: Workers’ comp payers typically follow state fee schedules rather than MPFS rates. Prior authorization may be required depending on the jurisdiction and the employer’s policy.

How to bill CPT 73070 in your practice management system

A standardized billing workflow reduces the view-count and modifier errors behind most 73070 denials. The six steps below apply the general rules of radiology charge entry to this one code.

1. Confirm the finalized radiology report before charge entry. Do not code from the order. The signed report is the source of truth for view count. If the report is not yet signed, hold the charge until it is.
2. Select the correct code from the report. Two documented views: 73070. Three or more documented views: 73080. Do not upgrade or downgrade based on assumption.
3. Apply the appropriate modifier. No modifier for global billing. Add -26 if the physician is billing only the professional read. Add -TC if the facility is billing only the technical component. Never combine -26 and -TC on the same line. Add -LT or -RT for laterality, and -50 for bilateral where the payer accepts it.
4. Link the ICD-10 diagnosis. Choose the most specific supported diagnosis from the clinical documentation. Elbow pain (M25.521 or M25.522) is acceptable when a definitive diagnosis has not yet been established.
5. Verify ordering vs. rendering provider. Box 17 (referring provider) on the CMS-1500 must reflect the ordering physician. If the radiologist both performs and interprets the study, they appear in Box 31.
6. Submit with documentation attached where required. Most clearinghouses accept the claim without the attached report, but certain payers or audit processes will request it. Keep the finalized report accessible in the patient record.

How Pabau keeps 73070 claims clean before submission

A practice that keys radiology charges by hand is working from two places at once. The signed report sits in one system and the charge goes into another, often typed from the order rather than the report. That separation is what lets a 2-view charge go out against a 3-view study.

Practice management software like Pabau holds the code, the modifier, and the linked ICD-10 diagnosis on the patient’s own record. Those fields feed accurate claims management software, which checks the pairing at charge entry instead of after the remittance arrives. A -26 and -TC conflict or a missing referring-provider NPI surfaces while someone can still fix it.

Claims then route through Claim.MD clearinghouse scrubbing, which flags common bundling and modifier errors before the payer sees them. Electronic remittance advice returns into the same patient record. The paid amount can then be reconciled against the expected fee schedule rate, with no separate spreadsheet.

Stop 73070 denials before they happen

Pabau’s claims management workflow links CPT codes, modifiers, and ICD-10 diagnoses inside the patient record. Catch view-count mismatches and modifier errors before submission, not after.

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Conclusion

CPT code 73070 fails in two predictable ways. Coders bill it against a report documenting 3 views, or they put -26 and -TC on one line and trigger an NCCI rejection. Coding from the finalized report and validating the modifier logic before submission prevents both.

The RVU split is worth carrying into any decision about how to bill. Practice expense accounts for 0.70 of the 0.88 total. A practice that owns the equipment and bills globally keeps considerably more than one billing only the read.

Book a demo to see how Pabau links charge entry, modifiers, and diagnosis codes so 73070 claims go out clean the first time.

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