CPT® 99100, Under Qualifying Circumstances for Anesthesia

The Current Procedural Terminology (CPT®) code 99100 as maintained by American Medical Association, is a medical procedural code under the range - Qualifying Circumstances for Anesthesia.

Subscribe to Codify by AAPC and get the code details in a flash.


This code, depicting the "age criteria", is a qualifying circumstance CPT. This is an add–on code, used along with a primary anesthesia procedure code, and is applied only in cases when the patient's age is less than 1 year or more than 70 years. At the time of billing for any anesthesia service provided to a patient, checking the patient's age becomes an important criterion. Documentation of the patient's age in the medical record by the physician is absolutely necessary for using this code.

For clinical responsibility, terminology, tips and additional info
start codify free trial.

View any code changes for 2024 as well as historical information on code creation and revision.
Combat the #1 denial reason - mismatched CPT-ICD-9 codes - with top Medicare carrier and private payer accepted diagnoses for the chosen CPT® code.
View the CPT® code's corresponding procedural code and DRG. In a click, check the DRG's IPPS allowable, length of stay, and more. To plug inpatient facility revenue drains, subscribe to DRG Coder today.
Crosswalk to an anesthesia code and its base units, and calculate payments in a snap! Subscribe to Anesthesia Coder today.
View matching HCPCS Level II codes and their definitions.


Have a question about CPT Code 99100 ? Start a discussion here