CPT 01520: Anesthesia for Procedures on the Lower Leg (Below Knee) - OpenPayer

Beta

OpenPayer Beta

Summary & Overview

CPT 01520: Anesthesia for Procedures on the Lower Leg (Below Knee)

CPT code 01520 covers anesthesia services for procedures performed on the lower leg, specifically below the knee, in an inpatient hospital setting. This code is widely used across the United States for surgeries such as knee replacements and other orthopedic interventions requiring anesthesia. Accurate coding is crucial for proper reimbursement and compliance with payer policies.

Major national payers including Aetna, Blue Cross Blue Shield, Cigna Health, and UnitedHealthcare recognize and reimburse for CPT code 01520. The publication provides an overview of payer coverage, common billing modifiers, and associated clinical diagnoses relevant to this code. Readers will gain insight into the clinical context of lower leg anesthesia, typical sites of service, and related procedural codes. The summary also highlights key ICD-10 diagnoses commonly linked to these procedures, such as various forms of knee osteoarthritis and the presence of artificial knee joints.

This article offers a comprehensive look at CPT code 01520, including its clinical application, payer coverage, and billing considerations. Healthcare professionals and policy analysts will find benchmarks, policy updates, and essential information for understanding the role of anesthesia in lower leg procedures.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareCPT 01520anesthesialower leg proceduresinpatient hospitalmedical billingorthopedic surgeryclinical codingpolicy updateICD-10 diagnosesprocedure codes

CPT Code Overview

CPT code 01520 is designated for anesthesia services provided during procedures on the lower leg (below the knee). This code is used when anesthesia is administered for surgical interventions targeting areas below the knee, ensuring patient comfort and safety throughout the procedure. The service type is anesthesia, and the typical site of service is an inpatient hospital setting (POS 21). This code is essential for accurately documenting and billing anesthesia care in lower leg surgeries performed in hospital environments.

Clinical & Coding Specifications

Clinical Context

A typical patient scenario involves an adult admitted to an inpatient hospital (Place of Service 21) for a surgical procedure on the lower leg, below the knee. The patient may have a diagnosis such as unilateral or bilateral primary osteoarthritis of the knee, or may be presenting for revision or replacement of an artificial knee joint. The anesthesia provider, who may be an anesthesiologist or a certified registered nurse anesthetist (CRNA), administers anesthesia for the duration of the surgical procedure. The clinical workflow includes preoperative assessment, induction and maintenance of anesthesia, intraoperative monitoring, and postoperative care in the recovery area.

Coding Specifications

Modifier Code	Description	Usage
`AA`	Anesthesia services performed personally by anesthesiologist	Used when the anesthesiologist is personally providing the anesthesia service.
`QK`	Medical direction of two, three, or four concurrent anesthesia procedures	Used when an anesthesiologist is medically directing multiple anesthesia procedures concurrently.

National Reimbursement Benchmarks

National mean rates for CPT code 01520 show that Blue Cross Blue Shield and Cigna have the highest average reimbursement, with Cigna at $197.87 and Blue Cross Blue Shield at $174.61. UnitedHealth Group's mean rate is notably lower at $65.54, while BUCA (the average commercial benchmark) stands at $110.91. Medicare rates are not available in the input for comparison.

Rate dispersion, measured by the difference between the 75th and 25th percentiles, varies significantly across payers. Aetna exhibits the widest spread ($194.00), indicating substantial variability in contracted rates. Blue Cross Blue Shield and Cigna also show considerable dispersion ($83.15 and $173.00, respectively). UnitedHealth Group has the tightest range ($24.75), suggesting more consistent rates across providers. The table and chart below present the full breakdown of national benchmarks for each payer.

State Benchmarks

State: AK1 / 50

Alaska Benchmarks

Alaska exhibits a significant rate spread for CPT code 01520, particularly with Blue Cross Blue Shield, where the 75th percentile ($268.67) is substantially higher than the 25th percentile ($177.20), resulting in a spread of $91.47. Other payers, such as Aetna and UnitedHealth Group, show minimal rate variation, with both having a spread of only $0.00 between the 25th and 75th percentiles. This indicates that reimbursement rates are more consistent for these payers, while Blue Cross Blue Shield demonstrates greater variability.

Compared to national averages, Alaska's mean rates for Blue Cross Blue Shield and UnitedHealth Group are notably higher, while Cigna and Aetna are below their respective national benchmarks. The table and chart below present the full breakdown of payer-specific reimbursement rates in Alaska for CPT code 01520.

Key Insights for Alaska

Blue Cross Blue Shield is the highest paying payer for CPT 01520 in Alaska, with a mean rate of $219.34.
UnitedHealth Group offers the lowest mean rate at $74.78.
Alaska's mean rates for most payers are higher than their respective national averages, except for Cigna and Aetna, which are below national benchmarks.

Related Codes

01432

CPT 01432: Anesthesia for Knee and Popliteal Vein Arteriovenous Fistula Procedures

01656

CPT 01656: Anesthesia for Axillary to Femoral Artery Bypass Graft

01730

CPT 01730: Anesthesia for Closed Procedures on Humerus and Elbow

01200

CPT 01200: Anesthesia for Upper Leg Procedures (Except Knee)

01756

CPT 01756: Anesthesia for Open or Arthroscopic Elbow Procedures

01772

CPT 01772: Anesthesia for Upper Arm and Elbow Procedures

01402

CPT 01402: Anesthesia for Total Knee Arthroplasty

01214

CPT 01214: Anesthesia for Total Hip Arthroplasty

01650

CPT 01650: Anesthesia for Knee Arthroscopy Procedures

01482

CPT 01482: Anesthesia for Radical Resection of Lower Leg, Ankle, and Foot

Showing 1–10 of 74

Trek Health ingests and normalizes Transparency in Coverage data and payer policy updates to give provider organizations a clear view of how commercial reimbursement behaves across markets, payers, and services. Our platform transforms raw payer disclosures into structured intelligence that supports contract evaluation, payer negotiations, and service line strategy. By combining market benchmarks with ongoing policy visibility, Trek helps teams identify variability, risk, and opportunity in commercial reimbursement. The result is faster insight, stronger negotiating positions, and more informed financial decisions.

Free Report

See how your rates compare to the market.

Get a free custom competitive market analysis.

Free Report

See how your rates compare to the market.

Get a free custom competitive market analysis.

QS

Related CPT Codes

CPT Code	Description	Clinical Relationship
`01502`	Anesthesia for Procedures on the Lower Leg (Below Knee)	May be used for similar procedures on the lower leg, below the knee, as an alternative or in conjunction with `01520` depending on the specific surgical approach.
`01522`	Anesthesia for Procedures on the Lower Leg (Below Knee)	Another code for anesthesia services for procedures below the knee, potentially used for different surgical techniques or patient scenarios.

These codes are related to 01520 and may be selected based on the exact nature of the surgical procedure. They are commonly used as alternatives depending on the operative details.

National Reimbursement Benchmarks

National Mean Rates for CPT Code `01520` by Payer

State Benchmarks

State: AK1 / 50

Alaska Benchmarks

Mean Reimbursement Rates by Payer in Alaska for CPT 01520

Key Insights for Alaska

Blue Cross Blue Shield is the highest paying payer for CPT 01520 in Alaska, with a mean rate of $219.34.
UnitedHealth Group offers the lowest mean rate at $74.78.
Alaska's mean rates for most payers are higher than their respective national averages, except for Cigna and Aetna, which are below national benchmarks.