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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Douglas C Lin, D.D.S.

General Practice Dentistry in Hercules, CA · enumerated 2006.

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

National Provider Identifier

1861588691

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Registry record

Entity type Individual (Type 1)
Name Dr. Douglas C Lin
Credential D.D.S.
Sex Male
Practice address 500 Alfred Nobel Dr, Suite 130, Hercules, CA, 94547
Phone (510) 741-1777
Fax (510) 741-7401
Enumeration date Oct 5, 2006
Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

1223G0001X General Practice Dentistry Dental Providers · License 44010 (CA) Primary
DDS · Doctor of Dental Surgery: A licensed dentist; DDS and DMD are equivalent dental degrees. About the DDS credential

Other identifiers

Identifier Type State Issuer
770587444 Other CA TAX ID

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 NPI 1861588691 active?
Yes, as of the latest NPPES snapshot, NPI 1861588691 is active (record last updated 2007-07-08).
How do I verify Douglas Lin's NPI record?
Cross-check NPI 1861588691 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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