NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Mark Yeejen Liu, DO

Family Medicine Physician in Rocklin, CA · enumerated 2006 · practices at Solidaritus Health California PC.

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

National Provider Identifier

1710967914

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Registry record

Entity type Individual (Type 1)
Name Dr. Mark Yeejen Liu
Credential DO
Sex Male
Practice address 6644 Lonetree Blvd Ste 300, Rocklin, CA, 95765
Phone (916) 721-2977
Fax (916) 659-9629
Enumeration date Jan 23, 2006
Last updated in NPPES Apr 16, 2025

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License DOS-1207 (HI) Secondary
207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License OP1714 (WA) Secondary
207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 20A22527 (CA) Primary
DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO credential

Other identifiers

Identifier Type State Issuer
7710782 Other - AETNA
OP1714 Other WA STATE MEDICAL LICENSE
632712-01 Medicaid HI -
8449845 Medicaid WA -
5389LI Other WA REGENCE BLUE SHIELD
22527 Other CA MEDICAL BOARD
0000284265 Other HI HMSA BILLING NUMBER
20A22527 Other CA MEDICAL BOARD
P00338717 Other - RAILROAD MEDICARE
208083 Other WA LABOR & INDUSTRIES

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

What specialty is Mark Liu?
Mark Liu is registered in NPPES with the primary taxonomy of Family Medicine Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-04-16.