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

Dr. John Leander Po, MD, PHD

Individual provider Infectious Disease Physician · NPI 1366638561

Dr. John Leander Po, MD, PHD is an Internal Medicine in Tucson, Arizona. Qualified in 2003, 23 years ago. Practices with Oak Street Health Physicians Group of Arizona PLLC, a 76-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Arizona and Massachusetts.

Years since qualifying
23
Licensed in
AZ, MA
In the registry since
2007
Specialties on file
3
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.
PHD — Doctor of Philosophy
A research doctorate. In healthcare it usually sits alongside a clinical licence.

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Practice location Address checks out

3902 E Grant Rd
Tucson, AZ 85712-2558
Phone: (520) 468-4801
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 7040 E Golf Links Rd, Tucson, AZ 85730-1000 — (520) 200-6709

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 37948 (AZ)
Infectious Disease Physician Taxonomy 207RI0200X · Licence 218627 (MA)
Infectious Disease Physician Taxonomy 207RI0200X · Licence 37948 (AZ)

Record details

NPI number1366638561
Entity typeIndividual (Type 1)
GenderMale
Credentials MD , PHD
Sole proprietorNo
NPI enumeratedSeptember 20, 2007
Last updated in NPPESJune 12, 2025
Certification dateJune 12, 2025

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Also practisesINFECTIOUS DISEASE
Medical schoolOTHER
Graduated 2003 (23 years in practice)
Group practice Oak Street Health Physicians Group Of Arizona Pllc — 76 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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