Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Dr. Robert Geoffrey Nelson, MD, PHD

Individual provider Internal Medicine Physician · NPI 1447589478

Dr. Robert Geoffrey Nelson, MD, PHD is an Internal Medicine Physician in Phoenix, Arizona. Licensed in Arizona and California. Registered with an NPI since 2009.

Licensed in
AZ, CA
In the registry since
2009
Specialties on file
2
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

1550 E Indian School Rd
Phoenix, AZ 85014-4972
Phone: (602) 200-5205
Fax: (602) 200-5225
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 15217 (AZ)
Internal Medicine Physician Taxonomy 207R00000X · Licence G43266 (CA)

Record details

NPI number1447589478
Entity typeIndividual (Type 1)
GenderMale
Credentials MD , PHD
Sole proprietorNo
NPI enumeratedDecember 22, 2009
Last updated in NPPESDecember 22, 2009

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