CPT Code 27130: Total hip arthroplasty billing guide

Key Takeaways

CPT code 27130 describes arthroplasty, acetabular and proximal femoral prosthetic replacement (total hip arthroplasty)

Medicare reimburses CPT 27130 in both hospital outpatient and ASC settings. Verify current rates via the CMS Physician Fee Schedule each calendar year

Always append laterality modifiers LT or RT. Missing a modifier is one of the most common denial triggers for this code

Pabau’s claims management software flags incomplete modifier and ICD-10 pairings before submission, reducing first-pass denials for high-complexity surgical codes like 27130

CPT code 27130 is one of the highest-value codes in orthopedic billing, and payer scrutiny matches that value. Incomplete documentation, missing laterality modifiers, and ICD-10 codes that don’t match the payer’s current coverage criteria drive most claim denials for this procedure.

This guide covers the official code description, current Medicare reimbursement data, applicable modifiers, covered ICD-10-CM diagnosis codes, documentation requirements, and the related codes billing teams need to know.

Orthopedic practices billing CPT 27130 face a dual challenge: satisfying Medicare’s medical necessity criteria while simultaneously meeting commercial payer pre-authorization requirements. Both demand the same underlying documentation, but the specific covered diagnosis codes and utilization guidelines can differ by payer and by MAC jurisdiction.

Getting the claim right the first time starts with understanding exactly what this code covers and what each payer needs to see.

CPT Code 27130: Definition and official description

CPT code 27130 is the standard billing code for total hip arthroplasty (THA), one of the most commonly performed major orthopedic procedures in the United States. According to the American Medical Association’s CPT code set, the official descriptor for this code is:

The procedure replaces both the acetabulum (socket) and the proximal femoral head (ball) with prosthetic components. It includes primary THA performed with or without bone grafting from the patient (autograft) or a donor source (allograft). A separate CPT code applies if only the femoral component is replaced (see CPT 27125 in the Related Codes section below).

RVU breakdown for CPT code 27130

Relative Value Units (RVUs) determine Medicare reimbursement for CPT 27130 under the Medicare Physician Fee Schedule (MPFS). CMS updates these values annually. The figures below reflect the CY2026 Medicare Physician Fee Schedule. Verify the current year values using the CMS Physician Fee Schedule lookup tool.

RVU values are multiplied by the annual CMS conversion factor to produce the Medicare allowable payment. Geographic practice cost indices (GPCIs) adjust the PE and MP components by location. Practices billing in high-cost metropolitan areas typically see higher allowables than rural settings for the same code.

Indications and medical necessity for total hip arthroplasty

Medicare and most commercial payers cover CPT 27130 when specific clinical criteria are met. Coverage criteria are defined in Local Coverage Determinations (LCDs) issued by each Medicare Administrative Contractor (MAC). Always check the applicable LCD for your jurisdiction before submitting. Common indications include:

• Severe hip osteoarthritis (M16.x): The most common indication. Documentation must show radiographic evidence of joint space narrowing plus functional impairment.
• Rheumatoid arthritis affecting the hip (M05.x, M06.x): Typically requires evidence of failed disease-modifying therapy before surgical approval.
• Avascular necrosis of the femoral head (M87.x): Stage III or IV AVN with collapse of the femoral head generally meets medical necessity criteria.
• Hip fractures (S72.x): Displaced femoral neck fractures in appropriate surgical candidates may be treated with THA rather than hemiarthroplasty.
• Inflammatory spondyloarthropathy involving the hip (M45.x): Ankylosing spondylitis is a less common but recognized indication when conservative management fails and imaging confirms joint destruction.
• Failed conservative management: Most payers require documented failure of non-surgical treatment (physical therapy, NSAIDs, corticosteroid injections) for a defined period before approving elective THA.

Medical necessity criteria vary by MAC and commercial payer. Never assume universal coverage based on diagnosis alone. Verify the specific LCD applicable to your MAC jurisdiction and confirm commercial payer clinical policy bulletins (such as Aetna CPB 0287) before billing.

Medicare reimbursement rates for CPT code 27130

CPT 27130 is reimbursed in both hospital outpatient (HOPD) and ambulatory surgical center (ASC) settings under Medicare. CMS removed total hip arthroplasty from the Inpatient-Only (IPO) list in the CY2020 OPPS/ASC Final Rule (CMS-1717-FC), then separately added it to the ASC Covered Procedures List effective January 1, 2021, via the CY2021 OPPS/ASC Payment System Final Rule (CMS-1736-FC).

Rates below are approximate CY2026 national averages, unadjusted for geographic locality. Actual payments vary by MAC jurisdiction and are updated annually.

Physician professional fees are billed separately from facility fees. The surgeon bills CPT 27130 against the MPFS facility rate regardless of whether the procedure is performed at a hospital or ASC.

The facility (hospital or ASC) bills the facility fee under OPPS or the ASC payment system, respectively. Implant costs are typically bundled into the facility payment and are not separately billable by the surgeon.

Facility payment figures reflect CY2026 OPPS Addendum B (HOPD, Comprehensive APC 5115) and ASC Addendum AA/BB national rates. Confirm current amounts against the applicable CMS addendum before estimating reimbursement, since these update annually and vary by geographic wage index.

For orthopedic practices tracking revenue cycle performance, practice management software like Pabau’s claims management software can help flag modifier mismatches and unsupported ICD-10 pairings before claims reach the payer. This is especially valuable for high-value surgical codes like 27130, where a single denial can hold up thousands of dollars in reimbursement.

Applicable modifiers for CPT code 27130

Modifier selection is one of the most denial-sensitive aspects of billing CPT 27130. Laterality modifiers are required for every claim. Applying the wrong modifier, or omitting it entirely, will result in an automatic denial from most payers.

For left-side procedures, use the left total hip arthroplasty CPT code pairing: 27130-LT. For right-side procedures, use 27130-RT. Bilateral modifier 50 rules vary significantly by payer.

Medicare generally processes bilateral procedures billed with modifier 50 at 150% of the single-procedure rate. The first side pays 100% and the second pays 50%. Confirm this with the applicable MAC before billing.

ICD-10 diagnosis codes that support CPT 27130

Pairing CPT 27130 with a supported ICD-10-CM diagnosis code is essential for establishing medical necessity. The table below lists the most commonly used covered diagnosis codes, based on CMS Article A57683.

The full covered code list is maintained in MAC-specific LCDs. Always consult the current published version for your jurisdiction. Use the AAPC Codify CPT lookup or a crosswalk tool to verify ICD-10 pairings before submission.

Hip arthroplasty ICD-10 code selection must be laterality-specific wherever the code set offers side-specific options. Using an unspecified code (e.g., M16.10) when a laterality-specific code exists may trigger an edit or denial, particularly under MAC-issued LCD policies.

Documentation requirements for billing CPT 27130

Incomplete documentation is the second most common denial reason for CPT 27130, after modifier errors. CMS Article A57683 and most MAC LCDs specify the minimum documentation elements required to support a claim. Practice administrators managing medical forms should pre-configure surgical note templates to capture all required fields before the operative date.

• Pre-operative imaging: AP and lateral hip radiographs with documented findings (joint space narrowing, osteophyte formation, subchondral sclerosis, or femoral head changes)
• Conservative treatment failure documentation: Specific dates, duration, and outcomes of non-surgical treatment including physical therapy, NSAIDs, intra-articular injections
• Functional impairment documentation: Validated patient-reported outcome scores (e.g., HOOS, Harris Hip Score) or documented limitation of activities of daily living
• Operative note: Complete description of surgical approach, components implanted (manufacturer, size, lot number), and intraoperative findings
• Anesthesia documentation: Type of anesthesia and ASA physical status classification
• Medical necessity letter: Narrative supporting the clinical decision for surgery, referencing failed conservative management and imaging findings
• Pre-authorization documentation: Payer authorization number, date issued, and authorized CPT codes. Maintain with the claim file

Pre-authorization is required by most major commercial payers for CPT 27130. Requirements vary by payer and plan. Confirm authorization requirements directly with each commercial payer before scheduling the procedure. Medicare does not require prior authorization for CPT 27130, but documentation must still meet LCD medical necessity criteria for the claim to pay.

Related CPT codes for hip arthroplasty

Selecting the correct CPT code for hip arthroplasty depends on the type of procedure performed:

• Primary total replacement
• Partial replacement
• Conversion
• Revision

Billing 27130 for a procedure that should be coded as a revision or partial replacement will result in a denial. The table below covers the core hip arthroplasty code family, including CPT 27447 for cross-reference to the analogous total knee arthroplasty procedure.

For practices billing both hip and knee arthroplasty, 27447 follows similar documentation and modifier principles to 27130. Orthopedic billing teams should be familiar with all codes in the 27125-27138 range to avoid miscoding between primary, conversion, and revision procedures.

Common billing errors and denial prevention for CPT 27130

Total hip arthroplasty billing is high-dollar and high-scrutiny. Payers apply multiple claim edits to this code specifically because of its reimbursement value. The most preventable denials fall into four categories.

Missing or incorrect laterality modifier

Submitting 27130 without LT or RT is the single most common denial trigger. Most clearinghouses will reject the claim before it reaches the payer. Build modifier LT/RT as a required field in your practice management system for this code. A claim for left total hip arthroplasty CPT code billing must always include the LT modifier.

Unsupported ICD-10 pairing

Billing CPT 27130 with a diagnosis code not on the payer’s covered list will trigger a medical necessity denial. This is most common when coders use unspecified osteoarthritis codes (M16.10) instead of laterality-specific codes, or when the diagnosis code doesn’t match the operative side.

Following the same HIPAA compliance documentation standards used elsewhere in the practice helps ensure the operative record, diagnosis, and claim all align.

Miscoding revision as primary

Billing 27130 for a procedure that involved revision of a previously placed implant will result in a claim edit or denial. Review operative notes carefully.

If the surgeon documents removal and replacement of an existing prosthetic component, the revision codes (27134, 27137, or 27138) apply, not 27130. A revision prompted by hardware failure is often coded with a bone continuity disorder such as M84.9 as a secondary diagnosis, alongside the revision procedure code.

Incomplete pre-authorization or expired authorization

Commercial payer authorizations for CPT 27130 are typically valid for a defined window (often 90-180 days). Performing the surgery after the authorization expiration date results in a denial even when all clinical criteria are met. Tracking authorization expiration dates is a critical administrative function for orthopedic practices, and automated workflow tools can flag upcoming expirations before they cause billing failures.

How practice management software supports CPT 27130 billing workflows

Standalone coding reference sites can tell you what a code means. They cannot prevent the errors that generate denials. Submitting a clean claim for CPT 27130 requires:

• Documentation capture
• Modifier validation
• ICD-10 pairing checks
• Authorization tracking

Pabau’s claims management software connects these steps, flagging issues before a claim reaches the clearinghouse rather than after it returns as a denial.

For orthopedic and sports medicine practices, the specific value is in pre-submission scrubbing. When a claim for CPT 27130 is assembled, the system can check that a laterality modifier is present, that the linked ICD-10 code is on the payer’s covered list, and that required documentation fields are populated.

Digital forms integrated into the clinical workflow ensure operative documentation, patient history, and consent are captured at the point of care, not reconstructed after the fact from paper records.

Practices managing both Medicare and commercial payer billing can also use practice management software to track per-payer authorization requirements and expiration dates, reducing the risk of billing outside an authorized window.

For multi-provider orthopedic groups, compliance management tools support audit-trail documentation requirements that become important during MAC audits of high-value surgical codes.

Reduce claim denials for high-value surgical codes

Pabau's claims management tools flag missing modifiers, unsupported ICD-10 pairings, and missing documentation before your CPT 27130 claims reach the payer. See how it works in your workflow.

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Conclusion

For practices billing total hip arthroplasty regularly, these requirements are manageable only when the documentation and billing workflow are integrated.

Pabau’s claims management software brings together clinical documentation, coding validation, and claim scrubbing in a single platform, so the checks happen before submission, not after a denial. To see how it handles complex surgical codes like CPT 27130, book a demo and walk through the workflow with your billing context in mind.

Continue your research

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