Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

William A Nahhas, MD

Gynecologic Oncology Physician in Centerville, OH · enumerated 2006.

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

National Provider Identifier

1972569218

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Registry record

Entity type Individual (Type 1)

Name William A Nahhas

Credential MD

Sex Male

Practice address 2300 Miami Valley Dr, Suite 260, Centerville, OH, 45459

Phone (937) 438-7800

Fax (937) 438-7811

Enumeration date Apr 25, 2006

Last updated in NPPES Apr 1, 2013

Taxonomy & licenses

207VG0400X Gynecology Physician Allopathic & Osteopathic Physicians · License 35049176 (OH) Secondary

207VX0201X Gynecologic Oncology Physician Allopathic & Osteopathic Physicians · License 35049176 (OH) 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
0519086	Medicaid	OH	-

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.

Read the full guide → Validate an NPI →

Frequently asked questions

What specialty is William Nahhas?

William Nahhas is registered in NPPES with the primary taxonomy of Gynecologic Oncology Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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.

Other providers at this practice address

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James Ouellette Surgical Oncology Physician · Centerville, OH NPI 1245288422 Compunet Clinical Laboratories, LLC Clinical Medical Laboratory · Centerville, OH NPI 1790028157 Fidelity Health Care Inc Prosthetic/Orthotic Supplier · Centerville, OH NPI 1104250430 Heather Miles Nurse Practitioner · Centerville, OH NPI 1528780335

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-04-01.