Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Alexander Chi-Shun Tsang, M.D.

Ophthalmology Physician in West Hartford, CT · enumerated 2006.

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

National Provider Identifier

1861464323

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Registry record

Entity type Individual (Type 1)

Name Dr. Alexander Chi-Shun Tsang

Credential M.D.

Sex Male

Practice address 84 Timberwood Rd, West Hartford, CT, 06117

Phone (907) 561-0774

Enumeration date Feb 7, 2006

Last updated in NPPES Nov 12, 2021

Taxonomy & licenses

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License 278622-1 (NY) Secondary

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License 01054818A (IN) Secondary

208D00000X General Practice Physician Allopathic & Osteopathic Physicians · License D85441 (MD) Secondary

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License 61715 (CT) Primary

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License 5655 (AK) Secondary

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
1015783	Medicaid	AK	-

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 Alexander Tsang?

Alexander Tsang 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.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-11-12.