Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Grace Yee Yan Lai, M.D., PH. D.

Neurological Surgery Physician in San Francisco, CA · enumerated 2015.

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

National Provider Identifier

1851785109

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Registry record

Entity type Individual (Type 1)

Name Grace Yee Yan Lai

Credential M.D., PH. D.

Sex Female

Practice address 550 16th St, San Francisco, CA, 94143

Phone (415) 476-3581

Enumeration date Mar 25, 2015

Last updated in NPPES Jun 30, 2022

Taxonomy & licenses

207T00000X Neurological Surgery Physician Allopathic & Osteopathic Physicians · License 1851785109 (IL) Secondary

390200000X Student in an Organized Health Care Education/Training Program Student, Health Care Secondary

207T00000X Neurological Surgery Physician Allopathic & Osteopathic Physicians · License A176698 (CA) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD 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.

Read the full guide → Validate an NPI →

Frequently asked questions

Is NPI 1851785109 active?

Yes, as of the latest NPPES snapshot, NPI 1851785109 is active (record last updated 2022-06-30).

How do I verify Grace Lai's NPI record?

Cross-check NPI 1851785109 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 2022-06-30.