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

Dr. Richard Yilin Zhang, OD, PH.D

Optometrist in Lexington, MA · enumerated 2006.

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

National Provider Identifier

1699850214

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Registry record

Entity type Individual (Type 1)

Name Dr. Richard Yilin Zhang

Credential OD, PH.D

Sex Male

Practice address Lexington, MA, 02421

Phone (781) 676-2020

Fax (781) 676-2021

Enumeration date Oct 25, 2006

Last updated in NPPES Dec 9, 2009

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

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers · License 0673 (NH) Secondary

152W00000X Optometrist Eye and Vision Services Providers · License 4116 (MA) Primary

OD · Doctor of Optometry: A licensed optometrist providing primary vision care, eye exams, and corrective lenses. About the OD credential

Other identifiers

Identifier	Type	State	Issuer
22-04131	Other	MA	UNITED HEALTH CARE
806550	Other	-	CIGNA
971342	Other	MA	NETWORK HEALTH
AA2096	Other	MA	HARVARD PILGRIM HEALTH CA
0024967	Other	MA	NEIGHBORHOOD HELATH PLAN
W16194	Other	MA	MCMS (MA)
2676542	Other	NH	AETNA
31167	Other	NH	AVESIS
ZH1327315	Other	NH	CLARITY VISION
09Y004242NH01	Other	NH	ANTHEM BCBS
0317420	Medicaid	MA	-

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

How do I verify Richard Zhang's NPI record?

Cross-check NPI 1699850214 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1699850214 active?

Yes, as of the latest NPPES snapshot, NPI 1699850214 is active (record last updated 2009-12-09).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-12-09.