Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Melissa A Derenzo, MD

Ophthalmology Physician in Butler, PA · enumerated 2006.

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

National Provider Identifier

1346327947

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Registry record

Entity type Individual (Type 1)

Name Melissa A Derenzo

Credential MD

Sex Female

Practice address 102 Technology Dr, Suite 120, Butler, PA, 16001

Phone (724) 482-0090

Fax (724) 482-0093

Enumeration date Nov 1, 2006

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License MD426870 (PA) 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
1186970001	Other	PW	DME
P00250791	Other	PA	RAILROAD MEDICARE
1013408410003	Medicaid	PA	-

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 Melissa Derenzo?

Melissa Derenzo is registered in NPPES with the primary taxonomy of Ophthalmology Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Other providers at this practice address

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Hung-Chi Ho Radiation Oncology Physician · Butler, PA NPI 1205833480 Denise Mckean Nurse Practitioner · Butler, PA NPI 1447280979 Constantine Balouris Ophthalmology Physician · Butler, PA NPI 1851478531 Balouris Eye Cener, PC Ophthalmology Physician · Butler, PA NPI 1679610521 David Cowan Dermatology Physician · Butler, PA NPI 1487795993 Richard F. Latuska, M.D. Gastroenterology Physician · Butler, PA NPI 1548301393 West Penn Radiation Oncology Associates, PC Radiation Oncology Physician · Butler, PA NPI 1649440611 Veronica Eisen Radiation Oncology Physician · Butler, PA NPI 1639310139

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.