Summary & Overview
CPT 13100: Complex Repair of Trunk Wounds
Headline: CPT 13100 — Complex Trunk Wound Repair and Its National Relevance
Lead: CPT 13100 codes for complex surgical repair of trunk wounds that require advanced closure techniques, representing an important category of integumentary surgery with implications for surgical practice patterns, facility utilization, and payer coverage nationally.
What the code represents and why it matters: CPT 13100 designates complex repair of the trunk, used when wounds demand multilayered closure, significant undermining, or scar revision. Because these procedures are commonly performed in outpatient hospital settings, they influence ambulatory surgical workload, resource allocation, and coding precision for surgeons and billing staff.
Key payers covered: The analysis addresses coverage and billing considerations relevant to Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare.
Overview of what readers will learn: Readers will find benchmarks for use of CPT 13100 relative to related closure codes, common clinical contexts for its application, and coding relationships within the integumentary surgical series. The publication outlines payer coverage scope and administrative considerations that affect claim adjudication and facility planning. Where input data is incomplete, the document notes absent items explicitly.
Bottom line: CPT 13100 is a distinct code within complex wound repairs of the trunk with operational relevance for clinicians, coders, and payers managing outpatient surgical services.
CPT Code Overview
CPT 13100 describes repair, complex, trunk — a surgical procedure involving complex closure techniques for wounds on the trunk that require layered closure, scar revision, or extensive undermining. This code falls under the Surgical procedures on the integumentary system service type. The typical site of service for CPT 13100 is Outpatient Hospital (POS 22).
Clinical & Coding Specifications
Clinical Context
A 45-year-old patient presents to an outpatient hospital surgical unit with a traumatic full-thickness laceration to the abdominal wall sustained during a fall. The wound has irregular edges, involves multiple tissue layers including subcutaneous tissue, and requires layered closure with extensive debridement and release of scar contracture elements. The surgical team evaluates hemostasis, performs careful wound debridement, mobilizes tissue for tension-free closure, places deep sutures as needed, and completes complex layered closure of the integumentary tissues under sterile conditions. The encounter is billed from the outpatient hospital (Place of Service 22) and managed by a surgeon credentialed in an applicable taxonomy.
Coding Specifications
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Modifiers
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59: Distinct Procedural Service — Used when the complex repair is separate and distinct from other procedures performed at the same session; applies when a separate anatomical site or separate lesion repair meets distinct service criteria. -
51: Multiple Procedures — Used when multiple surgical procedures (including repairs) are performed during the same operative session; applies to indicate secondary procedures that may be subject to reduced payment. -
Provider Taxonomies
| Taxonomy Code | Specialty |
|---|---|
208600000X | Surgery Physician |
208800000X | Plastic Surgery Physician |
207Q00000X | Family Medicine Physician |
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Notes on use
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Use modifier
59when documentation supports a distinct service separate from other procedures at the same visit. -
Use modifier
51to identify multiple procedures in a single operative session when billing the payer.
Related Diagnoses
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S01.81XA— Laceration without foreign body of other part of head, initial encounterClinical relevance: A laceration to the head can require complex layered closure techniques when tissue involvement and irregularity meet complexity criteria consistent with
13100. -
S31.119A— Laceration without foreign body of abdominal wall, initial encounterClinical relevance: Directly relevant to a trunk laceration requiring complex repair of the abdominal wall; aligns with the anatomic site for
13100. -
T81.31XA— Disruption of external operation (surgical) wound, not elsewhere classified, initial encounterClinical relevance: A disrupted surgical wound may necessitate complex repair, including debridement and layered reconstruction consistent with
13100. -
L90.5— Scar conditions and fibrosis of skinClinical relevance: Scar contracture or fibrotic changes can require complex scar revision techniques that fall under the scope of
13100when involving trunk tissues. -
S41.101A— Laceration without foreign body of unspecified shoulder, initial encounterClinical relevance: A shoulder laceration may require complex repair when tissue loss or irregularity involves multiple layers; while anatomically adjacent, documentation must support use of the trunk complex repair code if applicable.
Related CPT Codes
| CPT Code | Description | Relation to 13100 |
|---|---|---|
12031 | Intermediate repair (implied as commonly related closure category) | Often used earlier in the closure hierarchy for less complex layered repairs; may be an alternative for wounds not meeting complex repair criteria. |
13102 | Repair, complex, trunk (paired within same closure series) | A closely related code in the same complex repair series; may be reported for separate complex repairs on the trunk within the same session when applicable. |
- Common usage:
12031may be billed for intermediate repairs when the clinical complexity is below the threshold for13100.13102is paired within the complex repair series when multiple complex repairs of the trunk are performed; apply51for multiple procedures and59where services are distinct.
National Reimbursement Benchmarks
National mean rates for CPT 13100 place Medicare ($350.04) close to the BUCA (average commercial) mean ($351.42), with BUCA slightly higher by about $1.38. Commercial payers span a wider range of mean rates: UnitedHealth Group is highest at $491.95 while Aetna is lowest at $235.26.
Rate dispersion (P75 minus P25) varies by payer. UnitedHealth Group and Cigna show the widest interquartile ranges (UHC: $286.33; Cigna: $253.25), indicating greater variability in allowed rates. Medicare is the tightest with a range of $37.00, followed by Aetna ($110.67) and BUCA ($188.67). The table and chart below present the full percentile breakdown and national mean rates.
State Benchmarks
State: AK1 / 50
Alaska Benchmarks
Alaska exhibits a substantial spread in reimbursement rates for CPT code 13100, particularly among commercial payers. Aetna shows the widest rate spread, with a difference of $0.00 between the 75th and 25th percentiles, indicating uniformity at the top end, while Blue Cross Blue Shield demonstrates a spread of $405.41. Medicare's spread is much narrower at $33.00, reflecting more consistent rates across the state. Compared to national averages, Alaska's commercial payers reimburse at significantly higher levels, with mean rates for Aetna, Blue Cross Blue Shield, Cigna, UnitedHealth Group, and BUCA all well above their national benchmarks. This highlights Alaska's unique market dynamics and elevated reimbursement environment.
The table and chart below present the full breakdown of payer-specific rates for CPT code 13100 in Alaska, including mean rates and percentile distributions for each major payer.
Key Insights for Alaska
- Aetna is the highest paying payer for CPT 13100 in Alaska, with a mean rate of $1,123.39, while Medicare is the lowest at $338.58.
- All commercial payers in Alaska reimburse at rates significantly above their respective national averages, with Aetna's mean rate nearly five times the national mean.
- The rate spread is widest for Aetna and BCBS, indicating substantial variation in commercial reimbursement compared to Medicare's relatively narrow spread.
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