Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
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Dr. Mary Jean Fietz, MD

Individual provider Anatomic Pathology & Clinical Pathology Physician · NPI 1154396133

Dr. Mary Jean Fietz, MD practises Pathology in Tempe, Arizona. Graduated from University of Oklahoma College of Medicine in 1986, 40 years ago. Practices with St Josephs Pathology, a 12-clinician group and accepts Medicare assignment. Licensed in Arizona.

Years since qualifying
40
Trained at
University of Oklahoma College of Medicine
Licensed in
AZ
In the registry since
2006
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

1255 W Washington St
Tempe, AZ 85281-1210
Phone: (602) 685-5211
Fax: (602) 685-5028
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Anatomic Pathology & Clinical Pathology Physician (primary) Taxonomy 207ZP0102X · Licence 20108 (AZ)

Record details

NPI number1154396133
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedFebruary 22, 2006
Last updated in NPPESMarch 21, 2017

Medicare enrollment

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

Medicare specialtyPATHOLOGY
Medical schoolUNIVERSITY OF OKLAHOMA COLLEGE OF MEDICINE
Graduated 1986 (40 years in practice)
Group practice St Josephs Pathology — 12 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 patients390
Services billed 1,980 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.

Colleagues at St Josephs Pathology

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 12 clinicians in the practice; 4 are shown here.

Other providers in Tempe