CPT 01670: Anesthesia for Procedures on Veins of Shoulder and Axilla

CPT code 01670 designates anesthesia services for procedures on the veins of the shoulder and axilla. This code identifies anesthesia work associated with vascular interventions in the shoulder/axillary region and is used across hospital operating rooms and ambulatory surgical centers. Nationally, accurate use of this code affects anesthesia billing, resource allocation, and claims adjudication for upper-extremity vascular procedures.

Key payers addressed in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. The publication outlines payer coverage considerations, common billing modifiers, relevant clinician taxonomies, and typical diagnostic contexts associated with upper-extremity pain and ankle/foot pain entries provided in the input.

Readers will find a concise explanation of code intent and clinical setting, comparisons to related shoulder/axilla anesthesia codes, and an overview of documentation and claim components that commonly accompany use of this code. The report highlights benchmarking and policy-relevant points for national audiences, including payer alignment, claim bundling considerations, and coding adjacency to similar anesthesia codes. Data not available in the input is noted where applicable.

Billing Code Overview

CPT code 01670 describes anesthesia services provided for procedures on the veins of the shoulder and axilla. The service is an anesthesia encounter delivered by an anesthesia professional to support operative or interventional procedures targeting venous structures in the shoulder and axillary region.

Service type: Anesthesia for vascular procedures of the shoulder and axilla
Typical site of service: Hospital operating room or ambulatory surgical center where shoulder and axillary venous procedures are performed

Clinical Context

A 58-year-old female presents for elective surgical ligation and stripping of a symptomatic varicose vein cluster in the right axilla and proximal upper arm after conservative therapy failed. The surgical team schedules an outpatient procedure in an ambulatory surgical center. Preoperative evaluation by the anesthesia team documents chronic hypertension and a history of controlled asthma; airway assessment is unremarkable. On the day of surgery the anesthesiology provider performs pre-induction evaluation, administers general endotracheal anesthesia with appropriate monitoring, manages intraoperative hemodynamics, provides postoperative analgesia and hands off care to the PACU team. The encounter is reported with 01670 to indicate anesthesia for procedures on the veins of the shoulder and axilla. Typical workflow steps: preoperative assessment and consent; placement of monitoring and intravenous access; induction and maintenance of anesthesia; intraoperative anesthetic management including vascular access and blood pressure control; emergence and extubation; handoff to recovery staff with documentation of intraoperative events and medications administered.

Coding Specifications

Modifier	Description	When to Use
`22`	Increased procedural services	Use when anesthesia work required is substantially greater than typical for `01670` due to complexity or prolonged difficulty.

Taxonomy Code	Specialty	Notes
`207L00000X`	Anesthesiology Physician	Physician credential used when a physician anesthesiologist performs or directs the service.
`367500000X`	Certified Registered Nurse Anesthetist	Used when a CRNA provides the anesthesia service, with modifier linkage as required by payer policy.
`207RA0401X`	Anesthesiology Assistant	Used when an anesthesiology assistant participates under physician supervision per state and payer rules.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`M25.571`	Pain in right ankle and joints of right foot	Indicates lower-extremity joint pain; may be concurrent musculoskeletal complaints in the same patient but not directly related to axillary vein procedures.
`M25.572`	Pain in left ankle and joints of left foot	As above for the left lower extremity; documents comorbid musculoskeletal pain that may affect perioperative positioning or analgesic needs.
`M79.671`	Pain in right foot	Peripheral pain diagnosis that can impact perioperative mobility and postoperative care planning.
`M79.672`	Pain in left foot	Same relevance for the contralateral foot.
`S93.401A`	Sprain of unspecified ligament of right ankle, initial encounter	Acute lower-extremity injury; relevant as comorbidity affecting anesthesia positioning, thromboprophylaxis decisions, and postoperative mobility.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`01656`	Anesthesia for procedures on the shoulder and axilla	Alternative anesthesia code for shoulder/axilla procedures; used for different specific operative approaches or documentation of service level.
`01680`	Anesthesia for procedures on the shoulder and axilla	Related anesthesia code that may be appropriate for other types of shoulder/axilla procedures; selected based on procedure complexity and payer guidance.

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Summary & Overview