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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Demarie M Olu-Williams, D.O

Internal Medicine Physician in Mesa, AZ · enumerated 2013 · practices at Iora Senior Health, LLC.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1841533791

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Registry record

Entity type Individual (Type 1)
Name Demarie M Olu-Williams
Credential D.O
Sex Female
Practice address Mesa, AZ, 85207
Phone (480) 295-8070
Enumeration date Mar 28, 2013
Last updated in NPPES Apr 8, 2020

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License C2-0011826 (DE) Secondary
207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 008144 (AZ) Primary
DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO credential

Other identifiers

Identifier Type State Issuer
1841533791 Other DE NPI #

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
What specialty is Demarie Olu-Williams?
Demarie Olu-Williams is registered in NPPES with the primary taxonomy of Internal Medicine Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-04-08.