Summary & Overview
CPT 01522: Anesthesia for Total Knee Arthroplasty
CPT code 01522 represents anesthesia for open or surgical arthroscopic procedures on the knee joint, with a focus on total knee arthroplasty. This code is significant nationally due to the high volume of knee replacement surgeries and the critical role of anesthesia in ensuring patient safety and optimal surgical outcomes. The publication covers major commercial payers including Aetna, Blue Cross Blue Shield, Cigna Health, and UnitedHealthcare, providing a comprehensive overview of payer coverage and policy considerations for this service.
Readers will gain insights into the clinical context of total knee arthroplasty, typical sites of service, and relevant billing practices. The summary includes benchmarks for anesthesia services, updates on policy changes, and an overview of associated clinical diagnoses and related procedural codes. The information is organized to help stakeholders understand the importance of accurate coding and documentation for anesthesia in knee replacement procedures, as well as the implications for reimbursement and compliance across major payers. This resource is designed for healthcare professionals, billing specialists, and policy analysts seeking up-to-date information on anesthesia coding for knee arthroplasty.
CPT Code Overview
CPT code 01522 is used to report anesthesia services for open or surgical arthroscopic procedures on the knee joint, specifically for total knee arthroplasty. This code falls under the anesthesiology service type and is most commonly performed in an inpatient hospital setting (Place of Service 21). The procedure involves providing anesthesia care during surgical replacement of the knee joint, ensuring patient comfort and safety throughout the operation.
Clinical & Coding Specifications
Clinical Context
A typical patient scenario involves an adult patient admitted to an inpatient hospital for a total knee arthroplasty due to severe unilateral primary osteoarthritis of the knee. The patient has experienced chronic knee pain and functional limitation, and conservative treatments have failed. The orthopedic surgeon schedules a surgical procedure to replace the knee joint. An anesthesiology provider, such as an anesthesiologist or a certified registered nurse anesthetist (CRNA), administers anesthesia for the open surgical procedure. The clinical workflow includes preoperative assessment, administration of anesthesia, intraoperative monitoring, and postoperative care in the hospital setting.
Coding Specifications
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Modifiers:
Modifier Code Description Usage Context QSMonitored anesthesia care service Used when anesthesia is provided as monitored anesthesia care rather than general anesthesia. QXCRNA service with medical direction by a physician Used when a CRNA provides anesthesia services under the medical direction of a physician. -
Provider Taxonomies:
Taxonomy Code Specialty 207L00000XAnesthesiology 367500000XCertified Registered Nurse Anesthetist 207X00000XOrthopaedic Surgery -
Service Type:
- Anesthesiology
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Typical Site of Service:
- Inpatient Hospital (Place of Service
21)
- Inpatient Hospital (Place of Service
Related Diagnoses
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M17.10- Unilateral primary osteoarthritis, unspecified knee- Indicates primary osteoarthritis affecting one knee, without specification of laterality. Relevant as a common indication for total knee arthroplasty.
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M17.11- Unilateral primary osteoarthritis, right knee- Specifies osteoarthritis in the right knee, often leading to surgical intervention such as total knee arthroplasty.
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M17.12- Unilateral primary osteoarthritis, left knee- Specifies osteoarthritis in the left knee, also a frequent reason for knee replacement surgery.
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M23.9- Internal derangement of knee, unspecified- Refers to non-specific internal knee pathology, which may necessitate surgical procedures including arthroplasty or arthroscopy.
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Z96.651- Presence of right artificial knee joint- Indicates a patient has a right knee prosthesis, relevant for documentation in cases of revision surgery or when evaluating the contralateral knee for arthroplasty.
Related CPT Codes
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27447- Arthroplasty, knee, condyle and plateau; medial AND lateral compartments with or without patella resurfacing (total knee arthroplasty)- This code represents the surgical procedure for total knee replacement, which is the primary procedure for which anesthesia is provided under
01522. These codes are commonly used together in the clinical workflow.
- This code represents the surgical procedure for total knee replacement, which is the primary procedure for which anesthesia is provided under
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20610- Arthrocentesis, aspiration and/or injection into a major joint or bursa- This code is used for joint aspiration or injection, often performed for diagnostic or therapeutic purposes. It may be used as an alternative or prior to arthroplasty in patients with knee pathology.
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29881- Arthroscopy, knee, surgical; with meniscectomy (medial OR lateral, including any meniscal shaving)- This code is for surgical arthroscopy with meniscectomy. It is related as an alternative minimally invasive procedure for knee pathology, sometimes performed instead of total knee arthroplasty.
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29888- Arthroscopically aided anterior cruciate ligament repair/augmentation or reconstruction- This code is for ACL repair or reconstruction using arthroscopic techniques. It is related to knee surgery and may require anesthesia services similar to those described by
01522, but is not typically performed concurrently with total knee arthroplasty.
- This code is for ACL repair or reconstruction using arthroscopic techniques. It is related to knee surgery and may require anesthesia services similar to those described by
National Reimbursement Benchmarks
For CPT code 01522, national mean rates among commercial payers show significant variation. The BUCA (average commercial) mean rate is $133.08, while Medicare rates are not available in the input. Among individual commercial payers, Cigna has the highest mean rate at $299.28, and UnitedHealth Group has the lowest at $65.61.
Rate dispersion, measured by the difference between the 75th and 25th percentiles, varies notably across payers. Blue Cross Blue Shield exhibits the tightest range ($333.00 - $187.57 = $145.43), while Cigna shows the widest ($433.00 - $89.00 = $344.00). UnitedHealth Group has a relatively narrow range ($75.33 - $50.25 = $25.08), indicating less variability in rates. The table and chart below present the full breakdown of national benchmarks for each payer.
State Benchmarks
State: AK1 / 50
Alaska Benchmarks
Alaska demonstrates a significant rate spread for CPT code 01522, particularly with Blue Cross Blue Shield, where the difference between the 75th and 25th percentiles is $95.40. BUCA also shows a notable spread of $155.33, indicating substantial variability in reimbursement rates across payers. In contrast, Aetna and UnitedHealth Group have minimal spreads, with all percentiles clustered closely around $72.00, suggesting limited negotiation or variation in rates for these payers.
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 reimbursement rates in Alaska for CPT code 01522.
Key Insights for Alaska
- Blue Cross Blue Shield is the highest paying payer for CPT 01522 in Alaska, with a mean rate of $327.94.
- UnitedHealth Group offers the lowest mean rate at $74.78.
- Mean rates for most payers in Alaska are higher than their respective national averages, especially for Blue Cross Blue Shield and BUCA.
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.