Clinicians affiliated with Guardian Anesthesia Services, Inc

7 clinicians on file with this group · most practice in Denver-Aurora-Centennial, CO · PAC ID 8820030455

Affiliation snapshotOctober 2, 2026CMS Doctors and Clinicians file, current snapshot (no end-of-2024 archive), applied to 2024
Activity year2024Medicare Part B claims, Original Medicare fee-for-service

6 clinicians affiliated with Guardian Anesthesia Services, Inc are in the 2024 Medicare Part B data, 2 of them physicians. Data years with affiliated clinicians: 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024.

Each clinician's exact figures are in their Physician Report, from their page; a specialty's figures in this market are in a Market Comparison. View sample report · Already purchased? Open your report

Affiliated clinicians by specialty, 2024

All specialties · Certified Registered Nurse Anesthetist (CRNA) (4) · Anesthesiology (2)

Specialty links go to the specialty in Denver-Aurora-Centennial, CO.

Clinicians affiliated with Guardian Anesthesia Services, Inc, 2024

Alphabetical by last name; 6.

NameSpecialtyCity
Courtney M Cassias, CRNACertified Registered Nurse Anesthetist (CRNA)Aurora, CO
Maria B Dean, CRNACertified Registered Nurse Anesthetist (CRNA)Parker, CO
Jeffrey J Gonzales, MDAnesthesiologyAurora, CO
Anthony T Keever, M.D.AnesthesiologyLafayette, CO
Anne T Sage, CRNACertified Registered Nurse Anesthetist (CRNA)Aurora, CO
Andrea SchwiegerCertified Registered Nurse Anesthetist (CRNA)Omaha, NE

Practice locations

Listed practice locations in Colorado.

Source: CMS Doctors and Clinicians National Downloadable File, snapshot October 2, 2026.

Membership comes from the CMS Doctors and Clinicians file. CMS does not publish an end-of-year archive of it, so the current snapshot is applied to every data year. A clinician affiliated with several groups or hospitals appears on each of their pages. How group pages are built · Limitations