Glossary · Clinical

PCL reconstruction

PCL reconstruction is a surgical procedure that replaces a torn posterior cruciate ligament with a graft—autograft or allograft—to restore knee stability; it is most often performed arthroscopically and reported with CPT 29889.

Verified May 8, 2026 · 7 sources ↓

Drawn from AAPCAAOSHelpAdscCMS

Definition

Source · Editorial summary grounded in 7 cited references ↓

The posterior cruciate ligament (PCL) is the primary restraint against posterior tibial translation. When it ruptures—usually from a dashboard-type impact or hyperflexion injury—conservative management can manage many isolated grade I–II tears, but high-grade or combined ligament injuries typically require surgical reconstruction. The surgeon passes a graft (patellar tendon, quadriceps tendon, Achilles allograft, or other tissue) through bone tunnels drilled in the tibia and femur, replicating the native ligament's oblique course from the posterior tibia to the medial femoral condyle. Fixation is achieved with interference screws, buttons, or staples depending on graft type and surgeon preference.

Arthroscopic technique has become the standard approach because it allows simultaneous assessment and treatment of concomitant injuries—meniscal tears, cartilage damage, or multi-ligament instability—that frequently accompany PCL ruptures. Emerging evidence, highlighted in a 2025 AAOS OVT review, shows that primary PCL repair (rather than full reconstruction with a graft) is gaining traction for certain proximal and mid-substance tears, offering the potential to preserve native ligament tension and reduce residual laxity. Coders and surgeons should document the specific technique—repair vs. augmentation vs. full reconstruction—because clinical and payer scrutiny of these distinctions is increasing.

Why it matters

Selecting the wrong code between 29888 (ACL) and 29889 (PCL) is one of the most common line-item errors in knee arthroscopy billing; because these codes are near-identical in descriptor structure, a single transposition results in a denial or, worse, a paid claim that fails a retrospective audit. Beyond the primary code, failing to append laterality modifiers LT or RT will trigger claim rejection under Medicare and most commercial payers. When a PCL reconstruction is performed alongside ACL reconstruction or meniscal work in the same session, misapplication of Modifier 51 to add-on codes compounds underpayment across every multi-procedure case. Getting these details right at claim submission directly protects reimbursement and reduces audit exposure.

Common mistakes

Where people most often go wrong with this concept.

Source · Editorial brief grounded in cited references ↓

Reporting CPT 29888 (ACL) instead of 29889 (PCL)—the two descriptors look nearly identical and the error is easy to miss in high-volume coding environments.
Omitting laterality modifiers LT or RT on both the surgical code and any accompanying imaging codes (73560–73565, 73721–73723), causing automatic claim rejection.
Applying Modifier 51 to add-on codes billed in the same operative session, generating a second layer of payment reduction that is not appropriate for codes already priced as add-ons.
Failing to capture allograft documentation (HCPCS C1762) before claim submission, resulting in forfeited implant reimbursement or timely-filing violations when documentation is chased after the fact.
Coding the procedure as a repair when the operative note describes full reconstruction with a graft—or vice versa—creating a mismatch between the claim and the operative report that can trigger a payer audit.
Billing a diagnostic arthroscopy (29870) separately when it is performed immediately before the therapeutic arthroscopic PCL reconstruction in the same session, which violates NCCI bundling rules.

Related codes

Codes commonly involved when this concept appears in practice.

CPT

Modifiers

LT Left side RT Right side 51 Multiple procedures 22 Increased procedural services 59 Distinct procedural service

Frequently asked questions

Source · Generated from the editorial pipeline, verified against 7 cited references ↓

01What CPT code is used for arthroscopic PCL reconstruction?

CPT 29889 covers arthroscopically aided posterior cruciate ligament repair, augmentation, or reconstruction. Always append a laterality modifier—LT or RT—to this code when billing Medicare or commercial payers.

02How is PCL reconstruction coded differently from PCL repair?

Currently, both primary PCL repair and full PCL reconstruction with a graft are reported under 29889. The operative note must clearly state the technique used because payers increasingly scrutinize whether the procedure meets their medical-policy criteria for reconstruction versus repair, and future CPT revisions may distinguish the two.

03Can 29888 and 29889 be billed together when both ligaments are reconstructed in the same session?

Yes. When the ACL and PCL are both reconstructed arthroscopically in a single session, both 29888 and 29889 may be reported. The lower-weighted procedure should carry Modifier 51 under standard multiple-procedure payment rules, and both codes require the appropriate laterality modifier.

04How should allograft tissue be billed for PCL reconstruction?

Allograft tissue used in cruciate reconstruction is typically reported with HCPCS code C1762. Billing methodology varies by payer—some reimburse at invoice cost while others apply a fixed schedule rate—so confirm the payer's implant policy before submitting the claim, and attach OR supply documentation at the time of submission.

05Is an E/M visit separately billable on the day imaging is ordered for a suspected PCL tear?

Yes, a separately documented E/M service is billable at the initial encounter when the provider evaluates the patient and orders diagnostic imaging such as knee X-rays (73560–73565) or MRI (73721–73723). Ensure the documentation supports the level of E/M reported and that laterality modifiers are applied to the imaging codes.

06What is the significance of the emerging primary PCL repair technique for coders?

Primary arthroscopic repair—stitching the native PCL rather than replacing it with a graft—is coded under the same 29889 descriptor for now, but coders should document the technique precisely. As payer medical policies and CPT descriptors evolve to distinguish repair from reconstruction, practices that have maintained detailed operative documentation will be positioned to transition coding accurately without retrospective claim corrections.

Sources & references

Editorial content was developed using the following public sources. Last verified May 8, 2026.

01
aapc.com
https://www.aapc.com/codes/coding-newsletters/my-orthopedic-coding-alert/surgical-coding-gear-up-for-aclpcl-repairs-with-surgical-smarts-175344-article
02
aaos.org
https://www.aaos.org/aaosnow/2026/feb/clinical/clinical05/
03
help.jrfortho.org
https://help.jrfortho.org/en/article/helpful-codes-for-cruciate-reconstruction-with-allograft-1jzqziv/
04
adsc.com
https://www.adsc.com/blog/orthopedic-surgery-billing-codes-challenges-best-practices
05
aapc.com
https://www.aapc.com/discuss/threads/pcl-and-acl-reconstruction-arthroscopically.67829/
06AAOS Coding Resources — https://www.aaos.org/education/about-aaos-products/coding-resources/
07CMS NCCI Policy Manual (current edition)

Mira AI Scribe

When Mira detects documentation of a posterior cruciate ligament reconstruction, it flags CPT 29889 as the primary surgical code and prompts confirmation of operative side to auto-append LT or RT. If the note also documents an ACL reconstruction in the same session, Mira surfaces 29888 as a co-primary and alerts the coder that Modifier 51 applies to the lower-weighted procedure—but not to any add-on codes billed alongside it. When allograft tissue is documented (e.g., Achilles tendon allograft, tibialis anterior allograft), Mira queues HCPCS C1762 for implant billing and flags the claim as pending implant documentation to prevent submission before the OR supply sheet is attached. If the operative note describes a primary repair rather than reconstruction with a graft, Mira routes the encounter for coder review because the appropriate code selection may differ and payer medical-policy criteria for primary repair are still evolving. Mira also checks for concomitant meniscal or cartilage procedures in the same note and presents relevant bundle/unbundle logic under current NCCI edits to prevent inadvertent claim submission errors.

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Related terms

ACL reconstruction Clinical

ACL reconstruction is a surgical procedure that replaces a torn anterior cruciate ligament with a graft—typically patellar tendon, hamstring tendon, or quadriceps tendon autograft, or allograft tissue—to restore knee stability. It is most commonly performed arthroscopically and reported with CPT 29888.

Arthroscopy Clinical

Arthroscopy is a minimally invasive surgical procedure in which a small camera (arthroscope) is inserted into a joint to visualize, diagnose, and treat intra-articular pathology. It serves as both a diagnostic tool and a platform for therapeutic interventions such as debridement, meniscectomy, labral repair, and loose body removal.

Allograft Clinical

An allograft is bone or soft tissue harvested from a human donor (typically a cadaver) and transplanted into a different patient to support structural repair or fusion. It is distinct from an autograft, which uses tissue from the patient's own body.

Autograft Clinical

An autograft is tissue—most commonly bone, tendon, or cartilage—harvested from the same patient who will receive it, eliminating rejection risk and providing the biologic stimulus for successful incorporation.