Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Aaron T Gries, MD

Individual provider Anesthesiology Physician · NPI 1255377321

Aaron T Gries, MD practises Anesthesiology in Evansville, Indiana. Graduated from Indiana University School of Medicine in 1999, 27 years ago. Practices with Anesthesiology Group Associates PC, a 47-clinician group and accepts Medicare assignment. Licensed in Indiana.

Years since qualifying
27
Trained at
Indiana University School of Medicine
Licensed in
IN
In the registry since
2006
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

3700 Washington Ave St Marys Medical Center Anesthesia Dept
Evansville, IN 47750 Not confirmed with CMS for 15 years — call before visiting
Phone: (812) 485-4000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Anesthesiology Physician (primary) Taxonomy 207L00000X · Licence 01056077A (IN)
Pain Medicine (Anesthesiology) Physician Taxonomy 207LP2900X · Licence 01056077A (IN)

Record details

NPI number1255377321
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 20, 2006
Last updated in NPPESMay 26, 2011

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyANESTHESIOLOGY
Medical schoolINDIANA UNIVERSITY SCHOOL OF MEDICINE
Graduated 1999 (27 years in practice)
Group practice Anesthesiology Group Associates Pc — 47 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients437
Services billed 525 a service is one billed item, such as a visit, a test or a procedure
Average patient age73

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

  • Deaconess Hospital Inc Hospital · Evansville, IN · listed as Deaconess Hospital, Inc
  • Ascension St Vincent Evansville Hospital · Evansville, IN

Colleagues at Anesthesiology Group Associates PC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 47 clinicians in the practice; 12 are shown here.

Other providers in Evansville