Orthopedic Billing & Coding Guide 2026: CPT Codes & Modifiers

Orthopedic billing is a strict discipline where a single modifier error can turn a payable claim into a sudden denial or a compliance flag. Because of the global surgery concept, complex musculoskeletal codes, frequent modifier use, and heavy prior authorization requirements, orthopedics remains one of the most technically demanding billing specialties. It is also one of the highest-revenue specialties in medicine, which makes accurate coding a significant financial priority for your practice.

This comprehensive guide covers the vital CPT codes your orthopedic billing team must know in 2026. Furthermore, it outlines the global period rules governing surgical claims and details specific strategies to protect your reimbursement.

Global Surgery Periods: The Foundation of Orthopedic Billing

Before your team can master specific procedure codes, every orthopedic billing specialist must have a solid command of the Medicare global surgery policy. This framework strictly governs what you can and cannot bill separately after a surgical procedure.

The global period represents the time window following a surgery during which payers bundle post-operative care into the initial surgical payment. Currently, Medicare uses three distinct global period categories:

• 0-Day Global: This category covers minor procedures where payers bundle post-op care only on the day of surgery. Consequently, you can bill subsequent follow-up care separately.

• 10-Day Global: This designation applies to minor procedures where the global fee bundles all routine follow-up care for 10 days post-surgery.

• 90-Day Global: This group encompasses major surgical procedures—including most orthopedic surgeries—where the initial payment bundles all routine post-operative care for 90 days.

During a 90-day global period, you cannot separately bill Evaluation and Management (E/M) visits for routine post-operative care related to the surgery. However, you can utilize the following modifiers to bill separately when appropriate:

• Modifier -24: Unrelated E/M during a global period (the visit addresses a condition entirely unrelated to the surgery).

• Modifier -25: Significant, separately identifiable E/M on the same day as a procedure (use this when a provider documents an independent E/M preceding a same-day procedure).

• Modifier -57: E/M that results in the decision for major surgery (typically used either the day before or the day of surgery).

• Modifier -79: Unrelated procedure performed by the same physician during a global period.

• Modifier -78: Unplanned return to the operating room or procedure room for a related complication during the global period.

The Most Common Error: Billing a routine follow-up E/M for a wound check or suture removal during a 90-day global period without modifier -24, -57, or -25. This mistake results in an automatic denial or a costly recoupment.

High-Volume Orthopedic CPT Codes in 2026

Fracture Care

Providers select fracture care codes based on the fracture type, anatomical site, and specific treatment method (manipulation vs. without manipulation). These CPT codes encompass both the initial treatment and a fracture-specific global period. Usually, surgical treatment carries a 90-day window, whereas closed treatment without manipulation features a shorter period:

• 27786: Closed treatment of distal fibular fracture, without manipulation

• 27788: Closed treatment of distal fibular fracture, with manipulation

• 27814: Open treatment of bimalleolar ankle fracture

• 25600: Closed treatment of distal radial fracture, without manipulation

• 25607: Open treatment of distal radial extra-articular fracture

• 22318–22327: Odontoid/spine fracture treatment codes

Please note that you cannot report fracture care codes separately when a surgeon incidentally finds and treats a fracture during another distinct procedure. Instead, you must document the fracture treatment as a primary, independent service to bill for it successfully.

Joint Injections

Joint injections represent some of the highest-volume procedures in orthopedic and sports medicine practices. The key codes include:

• 20610: Arthrocentesis, aspiration and/or injection, major joint or bursa (e.g., shoulder, hip, knee); without ultrasound guidance

• 20611: Arthrocentesis, aspiration and/or injection, major joint or bursa; with ultrasound guidance, with permanent recording and reporting

• 20600: Arthrocentesis, aspiration and/or injection, small joint or bursa (e.g., fingers, toes); without ultrasound guidance

• 20605: Arthrocentesis, aspiration and/or injection, intermediate joint or bursa (e.g., wrist, elbow, ankle); without ultrasound guidance

• 27096: Injection procedure for sacroiliac joint, anesthetic/steroid, with image guidance

When providers use imaging guidance such as fluoroscopy or ultrasound for a joint injection, you must report the guidance code separately if the base code excludes it. For example, pair the injection with code 76942 for ultrasound or 77002 for fluoroscopic guidance. Failing to report these guidance codes creates a common undercoding pattern that drains revenue. Additionally, remember to report the injected medication (such as steroids, hyaluronic acid, or PRP) separately using the appropriate J-code or HCPCS code.

Knee Arthroscopy

Knee arthroscopy remains a highly frequent orthopedic procedure, but it also stands out as a major source of bundling denials. The base code (29881, arthroscopy, knee, surgical; with meniscectomy) already includes the diagnostic scope and basic meniscal work. If the surgeon performs additional arthroscopic procedures during the same session, you may report them separately by appending modifier -51 (multiple procedures):

• 29880: Arthroscopy, knee, surgical; with meniscectomy (medial AND lateral, including debridement)

• 29881: Arthroscopy, knee, surgical; with meniscectomy (medial OR lateral, including debridement)

• 29882: Arthroscopy, knee, surgical; with meniscus repair (medial OR lateral)

• 29883: Arthroscopy, knee, surgical; with meniscus repair (medial AND lateral)

• 29877: Arthroscopy, knee, surgical; debridement/shaving of articular cartilage (chondroplasty)

• 29888: Arthroscopically aided anterior cruciate ligament repair/augmentation

Always verify National Correct Coding Initiative (NCCI) edits before billing multiple knee arthroscopy codes in a single session. While some code combinations require modifier -59 (distinct procedural service) to bypass the edit, other pairs remain completely unbillable regardless of the modifier you use.

Shoulder Procedures

• 29819: Arthroscopy, shoulder, surgical; with removal of loose body or foreign body

• 29822: Arthroscopy, shoulder, surgical; debridement, limited

• 29823: Arthroscopy, shoulder, surgical; debridement, extensive

• 29827: Arthroscopy, shoulder, surgical; with rotator cuff repair

• 29807: Arthroscopy, shoulder, surgical; repair of SLAP lesion

• 23412: Open repair of chronic rotator cuff tear

Spine Surgery

Spine billing ranks among the most complex areas of orthopedics because of the numerous vertebral levels, the technical mixing of fusion and instrumentation codes, and frequent bundling edits:

• 22612: Arthrodesis, posterior or posterolateral technique, single level; lumbar

• 22614: Arthrodesis, posterior or posterolateral technique, each additional vertebral segment (add-on code)

• 22842: Posterior non-segmental instrumentation; 3 to 6 vertebral segments

• 63047: Laminectomy, facetectomy and foraminotomy, single segment; lumbar

• 22551: Arthrodesis, anterior interbody, including disc space preparation; cervical below C2 (ACDF), single level

• 22552: Arthrodesis, anterior interbody, including disc space preparation; cervical below C2 (ACDF), each additional interspace (add-on code)

Prior Authorization in Orthopedics: What Requires Auth in 2026

Prior authorization requirements for orthopedic procedures have expanded significantly in 2026. This trend is especially noticeable among Medicare Advantage (MA) plans and large commercial payers. Today, the services that most commonly require prior authorization include:

• Total Joint Replacement: Virtually all MA plans require formal authorization for total hip, knee, and shoulder replacements.

• Spine Surgery: Most commercial and MA plans mandate authorizations for lumbar fusions, cervical fusions, and laminectomies.

• Shoulder Procedures: Payers routinely review rotator cuff repairs and other major arthroscopic shoulder surgeries.

• Knee Arthroscopy: Many commercial plans now require authorization before allowing elective knee scopes.

• Biologics: Insurance companies strictly track advanced treatments and PRP injections.

To protect your revenue, you should build prior authorization verification directly into every surgical scheduling workflow. If a team performs an elective orthopedic procedure without an authorization number, the payer will issue a denial that becomes almost impossible to overturn retrospectively on clinical grounds.

Common Orthopedic Billing Denials and How to Prevent Them

Global Period Violations

Practices frequently trigger denials when they bill a post-op visit or a minor procedure within the global window without an appropriate modifier.

• Prevention Strategy: You can prevent this by flagging every patient with an active global period in your practice management system. Consequently, this system should require a formal modifier review before anyone submits a claim within that active window.

NCCI Bundling Errors

Billers often face rejections when they report procedure code combinations that are mutually exclusive, or when one code naturally serves as a component of the primary procedure.

• Prevention Strategy: Your practice can eliminate these errors by integrating automated NCCI edit checking directly into your billing software workflow. Furthermore, you should regularly train your coding staff to spot common orthopedic bundle pairs.

Missing or Incorrect Modifiers

Payers frequently require modifiers such as -22, -51, -59, and -LT/-RT in orthopedic billing, yet teams often omit or misuse them.

• Prevention Strategy: To solve this issue, your management team can develop a clear, visual modifier decision tree for your most frequently billed code combinations to guide staff daily.

Medical Necessity Denials for Arthroscopy

Insurance companies increasingly require documented failure of conservative therapy before they will authorize knee arthroscopy for degenerative conditions.

• Prevention Strategy: Your clinical team must explicitly document the duration and scope of conservative treatments—such as physical therapy, injections, and bracing, directly within both the authorization request and the final operative note.

Partnering With an Orthopedic Billing Specialist

Ultimately, orthopedic billing rewards deep specialization. The intricate global period rules, ever-shifting NCCI edits, expanding prior authorization landscape, and dense code complexity require a dedicated team that codes orthopedics daily rather than occasionally.

At Right On Time Medical Billing, our specialized orthopedic billing professionals expertly manage procedure coding, precise modifier application, global period tracking, and prior authorizations for practices across all 50 states. Contact us today to schedule your free coding audit and secure your practice’s financial health.