CPT 01420: Anesthesia for Knee Joint Surgical Procedures - OpenPayer

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Summary & Overview

CPT 01420: Anesthesia for Knee Joint Surgical Procedures

CPT code 01420 covers anesthesia services for open or surgical arthroscopic procedures on the knee joint, when the procedure is not otherwise specified. This code is widely used in the field of anesthesiology to document and bill for anesthesia care during complex knee surgeries, which are commonly performed in outpatient hospital settings. Nationally, the code is recognized by major payers including Aetna, Blue Cross Blue Shield, Cigna Health, and UnitedHealthcare, ensuring broad coverage for patients undergoing these procedures.

This publication provides a comprehensive overview of CPT 01420, including its clinical context, typical site of service, and relevance in medical billing. Readers will gain insights into payer coverage, common clinical scenarios, and related procedural codes. The analysis also highlights key modifiers and associated taxonomies relevant to anesthesia professionals. Policy updates and benchmarks are discussed to inform stakeholders about current trends and requirements in anesthesia billing for knee surgeries. The information is designed to support healthcare administrators, billing specialists, and clinical teams in understanding the nuances of anesthesia coding for knee procedures.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareCPT 01420anesthesiologyknee surgeryoutpatient hospitalmedical billingarthroscopyanesthesia servicesclinical codingpolicy updateprocedure codes

CPT Code Overview

CPT 01420 is designated for anesthesia services provided during open or surgical arthroscopic procedures on the knee joint that are not otherwise specified. This code is utilized by professionals in the field of anesthesiology to ensure safe and effective pain management during complex knee surgeries. The typical site of service for procedures billed under CPT 01420 is the outpatient hospital setting, specifically place of service code 22. This code is essential for accurately capturing the scope of anesthesia care in knee joint interventions, supporting both clinical documentation and billing processes.

Clinical & Coding Specifications

Clinical Context

A patient presents to an outpatient hospital with chronic knee pain and functional instability. After clinical evaluation and imaging, the patient is diagnosed with either osteoarthritis, meniscal tear, or chronic instability of the knee. The orthopedic surgeon schedules an open or surgical arthroscopic procedure on the knee joint to address the underlying pathology. An anesthesia provider, such as an anesthesiologist, certified registered nurse anesthetist (CRNA), or anesthesiology assistant, administers anesthesia for the procedure. The anesthesia service is coded with 01420 to reflect anesthesia for open or surgical arthroscopic procedures on the knee joint, not otherwise specified. The workflow involves preoperative assessment, induction and maintenance of anesthesia, intraoperative monitoring, and postoperative care in the outpatient hospital setting (Place of Service 22).

Coding Specifications

Modifiers:
- QS: Monitored anesthesia care service. Used when the anesthesia provider delivers monitored anesthesia care (MAC) rather than general anesthesia.
- QX: CRNA service with medical direction by a physician. Used when a certified registered nurse anesthetist (CRNA) provides anesthesia services under the medical direction of a physician.
Provider Taxonomies:

National Reimbursement Benchmarks

For CPT code 01420, national mean rates among commercial payers show notable variation. The BUCA (average commercial) mean rate is $101.57, while individual commercial payers range from $65.63 for UnitedHealth Group to $197.79 for Cigna. Blue Cross Blue Shield and Aetna fall in between, at $171.37 and $121.09 respectively. Medicare rates are not available in the input for comparison.

Rate dispersion, measured by the difference between the 75th and 25th percentiles, is widest for Aetna ($168.00) and Cigna ($173.42), indicating greater variability in contracted rates. UnitedHealth Group has the tightest range ($25.25), suggesting more consistent reimbursement levels. Blue Cross Blue Shield and BUCA also show moderate dispersion, at $107.88 and $92.50 respectively.

The table and chart below present the full breakdown of national benchmarks for each payer.

State Benchmarks

State: AK1 / 50

Alaska Benchmarks

Alaska shows a significant spread in reimbursement rates for CPT code 01420 across major commercial payers. The rate spread, calculated as the difference between the 75th and 25th percentiles, is most pronounced for Blue Cross Blue Shield ($91.47) and BUCA ($93.90), indicating substantial variability in negotiated rates. In contrast, Aetna, Cigna, and UnitedHealth Group display much narrower spreads, with most rates clustering around the lower end of the spectrum.

Compared to national averages, Alaska's mean rates for Blue Cross Blue Shield and BUCA are considerably higher, while Cigna and UnitedHealth Group are closer to or slightly above their national benchmarks. The table and chart below present the full breakdown of payer-specific rates in Alaska, highlighting these differences and the overall distribution.

Key Insights for Alaska

Blue Cross Blue Shield is the highest paying payer for CPT 01420 in Alaska, with a mean rate of $219.06.
UnitedHealth Group offers the lowest mean rate at $74.78.
Alaska's mean rates for most payers are notably higher than national averages, especially for Blue Cross Blue Shield and BUCA.

Related Codes

01756

CPT 01756: Anesthesia for Open or Arthroscopic Elbow Procedures

01490

CPT 01490: Anesthesia for Lower Leg (Below Knee) Procedures

01732

CPT 01732: Anesthesia for Diagnostic Elbow Arthroscopy

01444

CPT 01444: Anesthesia for Knee and Popliteal Artery Procedures

01636

CPT 01636: Anesthesia for Procedures on the Shoulder and Axilla

01656

CPT 01656: Anesthesia for Axillary to Femoral Artery Bypass Graft

01340

CPT 01340: Anesthesia for Closed Procedures on Lower Third of Femur

01442

CPT 01442: Anesthesia for Knee and Popliteal Area Procedures

01712

CPT 01712: Anesthesia for Upper Arm and Elbow Procedures

01215

CPT 01215: Anesthesia for Revision of Total Hip Arthroplasty

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