Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Mark Liu DDS PC

Q: What is the NPI number for Mark Liu DDS PC?

The NPI for Mark Liu DDS PC is 1134421381, a Type 2 (organization) record in the CMS NPPES registry.

Pediatric Dentistry in Elmhurst, NY · enumerated 2010 · authorized official Mark Liu, Dentist.

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

National Provider Identifier

1134421381

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Registry record

Entity type Organization (Type 2)

Legal business name Mark Liu DDS PC

Practice address 7911 41st Ave, Suite A-107, Elmhurst, NY, 11373

Phone (718) 205-2888

Fax (718) 205-2855

Enumeration date Nov 20, 2010

Last updated in NPPES Nov 20, 2010

Taxonomy & classification

1223P0221X Pediatric Dentistry Dental Providers · License 0518461 (NY) Primary

Authorized official

Name Mark Liu

Title Dentist

Phone (718) 205-2888

Other identifiers

Identifier	Type	State	Issuer
02654479	Medicaid	NY	-

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.

Read the full guide → Validate an NPI →

Frequently asked questions

Who is the authorized official for Mark Liu DDS PC?

NPPES lists Mark Liu (Dentist) as the authorized official for this organization.

What is the NPI number for Mark Liu DDS PC?

The NPI for Mark Liu DDS PC is 1134421381, a Type 2 (organization) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-11-20.