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

Ralph J Di Giovanni Jr., M.D.

Ophthalmology Physician in Bala Cynwyd, PA · enumerated 2006 · practices at Marvin H. Greenbaum, M.D. PC.

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

National Provider Identifier

1053428144

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Registry record

Entity type Individual (Type 1)

Name Ralph J Di Giovanni Jr.

Credential M.D.

Sex Male

Practice address Bala Cynwyd, PA, 19004

Phone (610) 667-4066

Fax (610) 667-7955

Enumeration date Aug 24, 2006

Last updated in NPPES Sep 22, 2014

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

Taxonomy & licenses

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License MD071468L (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
P00100824	Other	PA	RAILROAD MEDICARE
1319228	Other	PA	BLUE SHIELD
2853818	Other	PA	AETNA
2012200000	Other	PA	KEYSTONE
2012200000	Other	PA	PERSONAL CHOICE

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 is the NPI number for Ralph Di Giovanni?

The National Provider Identifier (NPI) for Ralph Di Giovanni is 1053428144, a Type 1 (individual) record in the CMS NPPES registry.

Where does Ralph Di Giovanni practice?

The practice location on file with NPPES is in Bala Cynwyd, PA. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

Browse all →

Marvin H. Greenbaum, M.D. PC Ophthalmology Physician · Bala Cynwyd, PA NPI 1154438521 Marvin Greenbaum Ophthalmology Physician · Bala Cynwyd, PA NPI 1073620472 Keith Mathers Ophthalmology Physician · Bala Cynwyd, PA NPI 1295989523

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-09-22.