Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Prof. Diana Emerson, N.P

Nurse Practitioner in San Mateo, CA · enumerated 2006.

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

National Provider Identifier

1194836494

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Registry record

Entity type Individual (Type 1)

Name Prof. Diana Emerson

Credential N.P

Sex Female

Practice address 100 S San Mateo Dr, San Mateo, CA, 94401

Phone (650) 404-8408

Enumeration date Aug 31, 2006

Last updated in NPPES Jun 23, 2025

Taxonomy & licenses

363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License NP5213 (CA) Primary

NP · Nurse Practitioner: An advanced practice registered nurse with graduate training, licensed to diagnose and treat, often with prescriptive authority. About the NP 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

What specialty is Diana Emerson?

Diana Emerson is registered in NPPES with the primary taxonomy of Nurse Practitioner. 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.

Other providers at this practice address

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Jeffrey J. Guttas. MD, Inc. Allergy & Immunology Physician · San Mateo, CA NPI 1073517009 Umesh Gheewala Internal Medicine Physician · San Mateo, CA NPI 1982608568 Frederick Adler Family Medicine Physician · San Mateo, CA NPI 1629030515 Harriet Borofsky Diagnostic Radiology Physician · San Mateo, CA NPI 1033162912 Kelly Broderick Diagnostic Radiology Physician · San Mateo, CA NPI 1609821891 Dennis Stempler Emergency Medicine Physician · San Mateo, CA NPI 1518907583 Clay Napper Diagnostic Radiology Physician · San Mateo, CA NPI 1053352815 Mills-Peninsula Health Services Rehabilitation Hospital · San Mateo, CA NPI 1770527251

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-06-23.