Clinicians affiliated with Griffiss Ec, LLC

14 clinicians on file with this group · most practice in Syracuse, NY · PAC ID 8628249521

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

14 clinicians affiliated with Griffiss Ec, LLC are in the 2024 Medicare Part B data, 6 of them physicians. Data years with affiliated clinicians: 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) (8) · Anesthesiology (6)

Specialty links go to the specialty in Syracuse, NY.

Clinicians affiliated with Griffiss Ec, LLC, 2024

Alphabetical by last name; 14.

NameSpecialtyCity
Brock J Amos, CRNACertified Registered Nurse Anesthetist (CRNA)Longview, WA
Lisa A Bristow, CRNACertified Registered Nurse Anesthetist (CRNA)Syracuse, NY
Joann Cook, CRNACertified Registered Nurse Anesthetist (CRNA)Utica, NY
Matthew L Dalton, MDAnesthesiologySyracuse, NY
Linda Demma, MD, PHDAnesthesiologyRochester, NY
Keith E Johnson, MDAnesthesiologyOneida, NY
Rosalie C Keith, DOAnesthesiologyAlfred, NY
Katherine A Kirk, CRNACertified Registered Nurse Anesthetist (CRNA)Rome, NY
Dean T Mazurek, CRNACertified Registered Nurse Anesthetist (CRNA)Camden, NJ
Stephen O'Brien, CRNACertified Registered Nurse Anesthetist (CRNA)Syracuse, NY
Michael Piazza, MS, CRNACertified Registered Nurse Anesthetist (CRNA)New Hartford, NY
Melany S Rookstool, M.D.AnesthesiologyIndianapolis, IN
Mark E Troendle, CRNACertified Registered Nurse Anesthetist (CRNA)Ashland, KY
Maria C Ziemba, MDAnesthesiologySyracuse, NY

Practice locations

Listed practice locations in New York.

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