CPT code 23430: Biceps tenodesis billing and reimbursement

Key takeaways

CPT code 23430 describes an open tenodesis of the long tendon of the biceps, coded in the 23395-23491 shoulder repair range.

An arthroscopic biceps tenodesis is 29828, so the approach in the operative report decides the code.

Every claim needs a laterality modifier, RT or LT, and a missing one is the most common denial trigger.

The ICD-10 code must carry the same side as the modifier, and M75.2 is the code for bicipital tendinitis.

Practice management software like Pabau surfaces modifier prompts, ICD-10 pairings, and NCCI edit alerts at charge entry.

CPT code 23430 covers tenodesis of the long tendon of the biceps. It is an open procedure that anchors the long head of the biceps tendon to the humerus or nearby soft tissue.

The American Medical Association (AMA) lists it in the shoulder repair range, 23395-23491, inside the Musculoskeletal System section of the CPT code set.

One distinction drives a large share of 23430 denials. The code describes an open procedure only. When the surgeon performs the tenodesis arthroscopically, the correct code is 29828, arthroscopy of the shoulder with biceps tenodesis. Billing 23430 for an arthroscopic case invites a medical necessity denial.

Denials on this code cluster around a short list of avoidable errors. Missing laterality modifiers, mismatched ICD-10 codes, and approach confusion account for most of them. Each one is caught at charge entry rather than on appeal.

Clinical indications for biceps tenodesis

Medical necessity is the first thing a payer audits. The operative report must tie the procedure to a documented condition that justifies surgery. Biceps tenodesis is indicated once conservative treatment has failed and the patient presents with one of the following.

• Bicipital tendinitis: Chronic inflammation of the long head of the biceps tendon, typically following failed physical therapy
• SLAP lesion (Superior Labrum Anterior to Posterior): Tear at the biceps anchor point; tenodesis is preferred over repair in older or lower-demand patients
• Partial biceps rupture: Structural failure of 25% or more of the tendon
• Biceps tendon instability: Subluxation or dislocation of the long head out of the bicipital groove
• Shoulder impingement syndrome: When concurrent biceps pathology is confirmed on imaging and examination

Three elements of the clinical record decide whether the claim survives review.

• Failed conservative care: Typically 6 to 12 weeks of physical therapy or injections, with the dates recorded
• Imaging findings: MRI or ultrasound confirming tendon pathology, referenced by study date
• Approach rationale: The surgeon’s reasoning for the open technique over arthroscopy

Medicare MACs set these criteria through Local Coverage Determinations, and the bar varies by jurisdiction. Pull your own MAC’s determination rather than relying on a neighboring state’s.

CPT 23430 reimbursement and the Medicare fee schedule

CMS publishes the Medicare rate for CPT 23430 annually. It varies by geographic location, practice setting, and the Geographic Practice Cost Index (GPCI) for your locality. Use the CMS Physician Fee Schedule lookup tool to pull current figures for your Medicare Administrative Contractor (MAC) locality.

National averages are a starting reference only. Your actual payment reflects the GPCI where you practice, which can move the figure in either direction.

Relative value units (RVUs) for CPT 23430

The Medicare payment for CPT 23430 comes from three RVU components multiplied by the CMS conversion factor. The conversion factor itself is set in the annual Physician Fee Schedule final rule. Use FastRVU’s 2026 RVU lookup to confirm the current values for your locality.

Facility vs. non-facility rates for CPT 23430

The setting where CPT 23430 is performed changes the physician’s Medicare payment. In a facility setting, CMS pays the hospital or surgery center directly for overhead. The physician’s payment then reflects the lower facility PE RVU. In an office the physician absorbs overhead and receives the higher non-facility rate.

Submitting a claim with the wrong place-of-service code is one of the less obvious denial triggers. A claim billed with POS 11 for a procedure performed at a hospital outpatient department will be recouped on audit. Confirm the POS code matches the setting on the date of service.

Modifiers for CPT 23430

Every claim for CPT 23430 requires a laterality modifier. The shoulder is a bilateral structure, so CMS rejects claims without RT for the right side or LT for the left. This is the single most common reason for an initial denial on a biceps tenodesis claim.

Confirm modifier requirements against the current CMS NCCI Policy Manual before submitting. Modifier 59 draws ongoing CMS scrutiny. Some MACs now prefer the X-modifier subset instead, meaning XE, XS, XP, and XU.

ICD-10-CM diagnosis codes for CPT 23430

The ICD-10-CM code paired with CPT 23430 must match the documented diagnosis and carry the correct laterality extension.

Laterality on the diagnosis code is a second denial trigger, separate from the procedure modifier. Coverage still depends on your MAC’s Local Coverage Determination (LCD), so verify the pairing against current-year AAPC code resources and your own LCD.

An unspecified-laterality extension triggers medical necessity review at many MACs, so always code the right or left side. Where several diagnoses apply, sequence the primary reason for the procedure first. In a combined case that also repairs the cuff, the right-shoulder companion diagnosis is M75.121.

Related CPT codes and co-billing guidance

Biceps tenodesis is often performed alongside other shoulder procedures in the same operative session. Whether a companion code can be billed separately depends on the National Correct Coding Initiative (NCCI) edits table that CMS maintains. A medical claims management system should flag these edit relationships at charge entry, before the claim reaches the payer.

Each companion code in the table describes an arthroscopic approach. When the distal clavicle is resected through an open incision instead, the claim carries CPT 23120 rather than 29824. On the biceps itself, a tendon that is released without reattachment is a tenotomy, billed as CPT code 23405 rather than 23430.

Bundling rules and NCCI edits

NCCI edits define which code pairs CMS treats as inherently bundled. When 23430 and a companion arthroscopic code are both reported, the edit table decides whether they can be billed together. It also decides whether a modifier can override the edit. CMS updates the tables quarterly, so check the current quarter rather than a cached copy.

• Column 1/Column 2 edits: The Column 2 code is bundled into the Column 1 code. A modifier may allow separate billing when the work is genuinely distinct and separately documented.
• Mutually exclusive edits: The two procedures cannot anatomically be performed together on the same site. No modifier can override this type of edit.
• Modifier 59 override: Only apply it for a different anatomical site, a different session, or a separate incision documented in the operative report.

Documentation requirements for CPT 23430

A clean operative report is the primary line of defense against a medical necessity denial. For CPT 23430, the documentation must support the diagnosis, the open approach, and the technique used. Practices that build these checks into the billing workflow catch errors before submission rather than during a retrospective payer audit.

• Diagnosis and laterality: Named condition, affected side, and supporting imaging findings referenced by date
• Failed conservative treatment: Duration, modalities tried, and documented lack of improvement
• Surgical approach: Open technique confirmed, with incision location, patient positioning, and anesthesia type
• Procedure technique: Method of tenodesis, fixation site on the humerus, and confirmation of adequate fixation
• Concurrent procedures: Each additional procedure described separately, with its own indications and technique
• Medical necessity statement: Surgeon attestation linking the documented pathology to the surgical decision

Global period for CPT 23430

CPT 23430 carries a 90-day global surgery period under CMS rules. Post-operative care inside those 90 days is included in the original payment. It cannot be billed separately to Medicare, apart from the exceptions below.

• Included in the global fee: Routine post-operative visits, wound checks, suture removal, and management of uncomplicated recovery
• Separately billable: Treatment of unrelated conditions, and complications that require a return to the OR under modifier 78
• Modifier 79: An unrelated procedure during another surgery’s global period. It is fully billable once the record documents why the service is unrelated.
• Modifier 24: An unrelated E&M service during the post-op period. Document that the visit was not routine post-op care.

Billing a routine follow-up inside the 90-day window without a valid modifier is a common compliance error in orthopedic practices. Audit post-op billing quarterly against your surgical date logs, so you find the pattern before a payer does.

Common denial reasons and how to avoid them

Denial patterns for CPT 23430 cluster around a small set of preventable errors, and each one maps to a step in the pre-submission workflow. The denial codes reference covers the CARC and RARC remittance codes that arrive with these rejections.

A pre-submission eligibility check removes another category of denials. Confirming active coverage and any prior authorization requirement at booking is far faster than appealing afterward.

Billing a 23430 claim means clearing six checkpoints in order, and each one has a denial attached to it.

How Pabau streamlines CPT 23430 billing

Reference tools give coders the answers. Practice management software like Pabau puts the answer in front of the coder at the moment the charge is created. That is the only moment when acting on it costs nothing.

Pabau’s Claim.MD integration reaches thousands of US payers for real-time eligibility checks and electronic claim submission. When a coder enters CPT 23430, the system can surface the laterality requirement and check the ICD-10 pairing against the linked diagnosis. It also flags an active NCCI edit on a companion code before the claim leaves the practice.

Pabau also generates superbills and exports CMS-1500 claims to Claim.MD. Electronic remittance advice and 835 files feed back into denial tracking, so the billing loop stays auditable at every step. That matters most for practices billing shoulder procedures in volume, where one repeated coding habit multiplies across dozens of claims.

Automate CPT 23430 billing from documentation to submission

Pabau connects operative documentation, charge capture, and claim submission in one workflow. Modifier prompts, NCCI edit alerts, and ICD-10 pairings surface at charge entry, so your team catches errors before they reach the payer.

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Conclusion

CPT 23430 is a simple code with an unforgiving claim. Payment turns on the approach, the laterality modifier, the ICD-10 side, and the global period. Those four checks are most of the job.

Move each check out of a coder’s memory and into the charge entry screen. The denial rate on this code then stops being a monthly surprise. The trade-off is setup time now against far fewer appeals later.

Pabau surfaces those prompts and edit alerts at the point of charge entry rather than during an appeal. Book a demo to see how it handles high-volume shoulder surgery billing.

Continue your research

Need to understand how claims move through the clearinghouse? Medical claims clearinghouse explained walks through how electronic claims are validated, scrubbed, and routed to payers.

Want to reduce the time between service and payment? Electronic remittance advice (ERA) guide covers how 835 files automate payment posting and denial identification.

Looking for the 837 transaction format requirements? 837 file format for medical billing explains the EDI transaction standard used for professional and institutional claim submission.

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