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DR. RONNIE C WILLIAM M.D.
NPI 1639319049
Internal Medicine - Endocrinology, Diabetes & Metabolism in Tucson, AZ

Active since February 25, 2009
3601 S 6TH AVE, TUCSON, AZ 85723(520) 792-1450(520) 626-2582 Get Directions Write a Review

NPPES record last updated: March 24, 2026. Verified against the NPPES registry weekly; last sync: August 30, 2026.

About Dr. Ronnie C William M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. RONNIE C WILLIAM M.D. (NPI 1639319049) is an individual endocrinology, diabetes & metabolism provider in Tucson, Arizona, licensed in Arizona (42303) and active in the NPI registry since February 2009.

NPPES Registry Identity

NPI1639319049
Entity TypeIndividualMale
Primary Taxonomy207RE0101X
Provider Legal NameDR. RONNIE C WILLIAMCredential: M.D.
Location Address3601 S 6TH AVETucson, AZ 85723-0001
Mailing Address378 E Saint Andrews DrHighland Heights, OH 44143-3657 · (708) 912-3734
Phone(520) 792-1450
Fax(520) 626-2582
Sole ProprietorYes
Enumeration DateFebruary 25, 2009
Last NPPES UpdateMarch 24, 2026
NPPES CertifiedMarch 24, 2026
✔ NPI 1639319049 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · Endocrinology, Diabetes & MetabolismAllopathic & Osteopathic Physicians
Taxonomy Code207RE0101X
License✔ Licensed in AZ · 42303
Definition
An internist who concentrates on disorders of the internal (endocrine) glands such as the thyroid and adrenal glands. This specialist also deals with disorders such as diabetes, metabolic and nutritional disorders, obesity, pituitary diseases and menstrual and sexual problems.
Also ListedInternal MedicineTaxonomy 207R00000X · License H3577 (AZ)
3601 S 6TH AVE, Tucson, AZ 85723
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Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. DAVID SPENCER HAMILTON SR. MD
Internal Medicine (Cardiovascular Disease)
3601 S 6TH AVE
TUCSON, AZ 85723
Pima County (520) 792-1450
KEVIN JAY CARRASCO PHARM.D.
Pharmacist
3601 S 6TH AVE
TUCSON, AZ 85723
Pima County (520) 792-1450
BRITTANY BERNADETTE HERRERA MSW
Social Worker
3601 S 6TH AVE
TUCSON, AZ 85723
Pima County (520) 792-1450
EVAN KEITH MALLORY PHARMD
Pharmacist
3601 S 6TH AVE
TUCSON, AZ 85723
Pima County (520) 792-1450
MS. JANICE ELIZABETH THRON-KELLY LCSW
Social Worker (Clinical)
3601 S 6TH AVE
TUCSON, AZ 85723
Pima County (520) 792-1450
CRISTINA IRENE MATEI M.D.
Psychiatry & Neurology (Neurology)
3601 S 6TH AVE
TUCSON, AZ 85723
Pima County (520) 792-1450
RAVEN JANIN MARSHALL-SANTILLAN PA-C
Physician Assistant
3601 S 6TH AVE
TUCSON, AZ 85723
Pima County (520) 792-1450
DR. JEREMY W HALL PHARM D
Pharmacist
3601 S 6TH AVE
TUCSON, AZ 85723
Pima County (520) 792-1450

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Ronnie William's NPI number?

The NPI number for Ronnie William is 1639319049. It was assigned to this individual provider in the NPPES registry on February 25, 2009.

Where is Ronnie William located?

Ronnie William practices at 3601 S 6th Ave, Tucson, AZ 85723. The listed phone number is (520) 792-1450.

What is Ronnie William's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Endocrinology, Diabetes & Metabolism, with taxonomy code 207RE0101X.

When was this NPI record last updated?

The NPPES record for Ronnie William was last updated on March 24, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.