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

Dr. Walter John Nieri, MD

Individual provider Geriatric Medicine (Internal Medicine) Physician · NPI 1265488258

Dr. Walter John Nieri, MD is an Internal Medicine in Phoenix, Arizona. Qualified in 1968, 58 years ago. Practices with Banner Hospital Based Physicians Arizona LLC, a 641-clinician group and accepts Medicare assignment. Licensed in Arizona.

Years since qualifying
58
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

6510 N 27th St
Phoenix, AZ 85016-8943
Phone: (602) 885-1988
Fax: (602) 951-9750
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Geriatric Medicine (Internal Medicine) Physician (primary) Taxonomy 207RG0300X · Licence 6055 (AZ)

Record details

NPI number1265488258
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 25, 2006
Last updated in NPPESFebruary 24, 2009

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Also practisesGERIATRIC MEDICINE
Medical schoolOTHER
Graduated 1968 (58 years in practice)
Group practice Banner Hospital Based Physicians Arizona Llc — 641 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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