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00100
Anesthesia for Procedures on Salivary Glands, Including Biopsy Billing & Coding Guide
Code Description
CPT code 00100 describes anesthesia services provided for procedures involving the salivary glands, including biopsies. The anesthesia provider is responsible for performing the pre-anesthesia evaluation, administering anesthesia, continuously monitoring the patient throughout the procedure, and managing recovery until care is transferred appropriately.
This code is commonly reported for procedures involving the parotid, submandibular, and sublingual glands. Reimbursement is determined using anesthesia base units, documented anesthesia time, applicable physical status modifiers, and any qualifying circumstances recognized by the payer.
When to Use CPT 00100
Report 00100 when anesthesia services are provided for surgical procedures involving the salivary glands, including biopsies. The anesthesia record should document continuous care from induction through transfer to postoperative recovery.
When Not to Use CPT 00100
Do not report 00100 when another anesthesia CPT code more specifically describes the surgical procedure. This code should also not be reported by the operating surgeon or for moderate sedation services reported separately under CPT guidelines.
Documentation Requirements
Documentation should include the pre-anesthesia evaluation, anesthesia start and stop times, ASA physical status, medications administered, airway management, monitoring performed, patient response throughout the procedure, and the post-anesthesia evaluation. The operative report should clearly support that the anesthesia service corresponds to a salivary gland procedure.
Documentation Checklist
✔ Medical necessity documented
✔ Salivary gland procedure documented
✔ Pre-anesthesia evaluation completed
✔ Anesthesia start and stop times documented
✔ ASA physical status documented
✔ Complete anesthesia record maintained
Billing Examples
Example 1
An anesthesiologist administers general anesthesia for a patient undergoing a superficial parotidectomy to remove a benign parotid tumor. Report CPT code 00100 for the anesthesia service.
Example 2
A patient undergoes a submandibular gland biopsy under general anesthesia. The anesthesia provider documents the complete anesthesia record, including time, monitoring, and postoperative evaluation, and reports CPT code 00100.
Base Units & Reimbursement
Anesthesia reimbursement for CPT 00100 is based on a combination of base units, anesthesia time units, and the payer's conversion factor. Additional payment may be available when qualifying circumstances are reported and supported by documentation.
Providers should accurately document anesthesia start and stop times, assign the appropriate ASA physical status modifier, and follow payer-specific billing requirements to ensure proper reimbursement.
Coding & Billing Tips
Document Accurate Anesthesia Time
Record anesthesia start and stop times precisely, as anesthesia time directly affects reimbursement.
Verify the Surgical Procedure
Confirm the surgical procedure matches the anesthesia CPT code before submitting the claim.
Maintain Complete Documentation
Ensure the anesthesia record includes the pre-anesthesia evaluation, monitoring, medications, airway management, and postoperative assessment.
Common Billing Mistakes
Reporting the Wrong Anesthesia Code
Verify the surgical procedure corresponds to CPT code 00100 before billing.
Incomplete Time Documentation
Missing or inaccurate anesthesia start and stop times may reduce reimbursement or result in claim denial.
Incomplete Anesthesia Record
Failure to document required monitoring, medications, ASA status, or postoperative evaluation may delay payment.
Applicable ICD-10-CM Diagnosis Codes
Diagnosis codes should accurately reflect the documented condition and support medical necessity. The examples below are not all-inclusive.
D11.0 – Benign Neoplasm of Parotid Gland
This diagnosis may support medical necessity when anesthesia is provided for surgical removal or biopsy of a benign parotid gland tumor. Documentation should support the diagnosis and planned surgical procedure.
K11.20 – Sialadenitis, Unspecified
This diagnosis may support medical necessity when anesthesia is required for surgical treatment of an inflamed salivary gland. Documentation should identify the affected gland and medical necessity for surgery.
C07 – Malignant Neoplasm of Parotid Gland
This diagnosis may support medical necessity when anesthesia is provided for surgical treatment of parotid gland cancer. Documentation should include the diagnosis and planned operative intervention.
Related Codes
00102 – Anesthesia for Plastic Repair of Cleft Lip
Report 00102 when anesthesia is provided for cleft lip repair procedures rather than salivary gland surgery.
00103 – Anesthesia for Procedures on Nose and Accessory Sinuses
00103 describes anesthesia services for nasal and sinus procedures requiring a different anesthesia code.
00104 – Anesthesia for Electroconvulsive Therapy
00104 is reported for anesthesia provided during electroconvulsive therapy rather than surgical procedures.
Frequently Asked Questions
How is CPT code 00100 reimbursed?
Reimbursement is based on anesthesia base units, documented anesthesia time, the payer's conversion factor, and any applicable adjustments.
Does CPT code 00100 include anesthesia time?
Yes. Accurate documentation of anesthesia start and stop times is essential because anesthesia time is included in reimbursement calculations.
Can a CRNA report CPT code 00100?
Yes. CRNAs may report CPT code 00100 when billing under applicable Medicare or commercial payer guidelines.
Is an ASA physical status modifier required?
Most payers require an ASA physical status modifier to accurately reflect the patient's condition during anesthesia.
Can qualifying circumstance codes be reported with CPT 00100?
Yes. Qualifying circumstance codes may be reported when documentation supports additional complexity and payer requirements are met.
Category
CPT
Typical Time
Hospital & Ambulatory Surgery Center
Base units assigned by payer
Description
Code Type
Code
00100
Anesthesia for salivary gland procedures
Anesthesia
Common Setting
