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

Dr. Allan Tsai, DDS

Dentist in Columbia, MD · enumerated 2007.

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

National Provider Identifier

1326237173

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Registry record

Entity type Individual (Type 1)

Name Dr. Allan Tsai

Credential DDS

Sex Male

Practice address Columbia, MD, 21044

Phone (301) 775-7817

Enumeration date Oct 17, 2007

Last updated in NPPES Jan 19, 2016

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

Taxonomy & licenses

104100000X Social Worker Behavioral Health & Social Service Providers · License LC300618 (MD) Secondary

122300000X Dentist Dental Providers · License DC 3734 (DC) Primary

DDS · Doctor of Dental Surgery: A licensed dentist; DDS and DMD are equivalent dental degrees. About the DDS credential

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 Allan Tsai?

Allan Tsai is registered in NPPES with the primary taxonomy of Dentist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Other providers at this practice address

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Kathryn Tsai Clinical Social Worker · Columbia, MD NPI 1366772824

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-01-19.