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

Dr. Ronnie C William, MD

Individual provider Endocrinology, Diabetes & Metabolism Physician · NPI 1639319049

Dr. Ronnie C William, MD is an Endocrinology, Diabetes & Metabolism Physician in Tucson, Arizona. Practices as a sole proprietor. Licensed in Arizona.

Licensed in
AZ
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.

See every abbreviation used in this directory →

Practice location Address checks out

3601 S 6th Ave
Tucson, AZ 85723-0001
Phone: (520) 792-1450
Fax: (520) 626-2582
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Endocrinology, Diabetes & Metabolism Physician (primary) Taxonomy 207RE0101X · Licence 42303 (AZ)
Internal Medicine Physician Taxonomy 207R00000X · Licence H3577 (AZ)

Record details

NPI number1639319049
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedFebruary 25, 2009
Last updated in NPPESMarch 24, 2026
Certification dateMarch 24, 2026

Other providers in Tucson