Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Ronald John Maggiore, M.D.

Medical Oncology Physician in Ann Arbor, MI · enumerated 2006.

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

National Provider Identifier

1609834977

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Registry record

Entity type Individual (Type 1)

Name Dr. Ronald John Maggiore

Credential M.D.

Sex Male

Practice address 2366 Oak Valley Dr, Ann Arbor, MI, 48103

Phone (877) 227-8823

Fax (313) 578-6393

Enumeration date May 3, 2006

Last updated in NPPES May 12, 2022

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 48589 (WI) Secondary

207RG0300X Geriatric Medicine (Internal Medicine) Physician Allopathic & Osteopathic Physicians · License 036-124824 (IL) Secondary

207RH0000X Hematology (Internal Medicine) Physician Allopathic & Osteopathic Physicians · License 286694 (NY) Secondary

207RH0000X Hematology (Internal Medicine) Physician Allopathic & Osteopathic Physicians · License 045699 (CT) Secondary

207RH0003X Hematology & Oncology Physician Allopathic & Osteopathic Physicians · License 036-124824 (IL) Secondary

207RH0003X Hematology & Oncology Physician Allopathic & Osteopathic Physicians · License MD163132 (OR) Secondary

207RH0003X Hematology & Oncology Physician Allopathic & Osteopathic Physicians · License 286694 (NY) Secondary

207RX0202X Medical Oncology Physician Allopathic & Osteopathic Physicians · License 4301506862 (MI) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
04612057	Medicaid	NY	-

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 Ronald Maggiore?

Ronald Maggiore is registered in NPPES with the primary taxonomy of Medical Oncology 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 2022-05-12.