Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Robert G. Alexander, M.D.

Ophthalmology Physician in Stoneham, MA · enumerated 2006.

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

National Provider Identifier

1699755074

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Registry record

Entity type Individual (Type 1)

Name Dr. Robert G. Alexander

Credential M.D.

Sex Male

Practice address 3 Woodland Rd, Suite 112, Stoneham, MA, 02180

Phone (781) 665-3773

Fax (781) 665-6784

Enumeration date Jan 20, 2006

Last updated in NPPES Apr 26, 2026

Taxonomy & licenses

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License 45358 (MA) 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
0118974	Medicaid	MA	—
15451	Other	—	HCHP
705782	Other	MA	TUFTS
0004373587	Other	—	AETNA
87726	Other	—	UNITEDHEALTHCARE
28693	Other	—	FALLON
B40075	Other	MA	BCBS

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

What specialty is Robert Alexander?

Robert Alexander 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.

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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-04-26.