Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Dr. Steven T Zierer, MD

Individual provider Gastroenterology Physician · NPI 1366437337

Dr. Steven T Zierer, MD is a Gastroenterology in Mesa, Arizona. Graduated from Indiana University School of Medicine in 1989, 37 years ago. Practices with Kalispell Regional Medical Center Inc, a 418-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Arizona and Montana.

Years since qualifying
37
Trained at
Indiana University School of Medicine
Licensed in
AZ, MT
In the registry since
2005
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

6020 E Arbor Ave Ste 101
Mesa, AZ 85206-6102
Phone: (480) 985-1700
Fax: (480) 396-3659
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 320 Sunnyview Ln, Kalispell, MT 59901-3129 — (064) 752-7441

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence 20445 (AZ)
Gastroenterology Physician Taxonomy 207RG0100X · Licence 141413 (MT)

Record details

NPI number1366437337
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedSeptember 15, 2005
Last updated in NPPESApril 28, 2025
Certification dateApril 28, 2025

Medicare enrollment

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

Medicare specialtyGASTROENTEROLOGY
Medical schoolINDIANA UNIVERSITY SCHOOL OF MEDICINE
Graduated 1989 (37 years in practice)
Group practice Kalispell Regional Medical Center Inc — 418 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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