Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

TIFFANY JULIA SPENCER DNP, NP
NPI 1821863481
Nurse Practitioner in Stanford, CA

Q: What is Tiffany Spencer's NPI number?

The NPI number for Tiffany Spencer is 1821863481. It was assigned to this individual provider in the NPPES registry on November 22, 2023.

Q: What is Tiffany Spencer's specialty?

The primary specialty registered for this NPI is Nurse Practitioner with taxonomy code 363L00000X.

Q: When was this NPI record last updated?

The NPPES record for Tiffany Spencer was last updated on July 6, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 37 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since November 22, 2023PECOS Enrolled

300 PASTEUR DR, STANFORD, CA 94305(650) 723-4000 Get Directions Write a Review

NPPES record last updated: July 6, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Jul 6, 2026, Nov 22, 2023 (2 updates tracked since 2023).

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About Tiffany Julia Spencer Dnp, Np NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

TIFFANY JULIA SPENCER DNP, NP (NPI 1821863481) is an individual nurse practitioner in Stanford, California, licensed in California (95036203) and active in the NPI registry since November 2023. She is enrolled in Medicare PECOS, maintains a secondary practice location in Merced, and is a graduate of Other (2025).

NPPES Registry Identity

NPI1821863481

Entity TypeIndividualFemale

Primary Taxonomy363L00000X

Provider Legal NameTIFFANY JULIA SPENCERCredential: DNP, NP

Location Address300 PASTEUR DRStanford, CA 94305-2200

Mailing Address300 Pasteur DrStanford, CA 94305-2200 · (650) 723-4000

Phone(650) 723-4000

Sole ProprietorYes

Medical School CMSOtherGraduated 2025

Enumeration DateNovember 22, 2023

Last NPPES UpdateJuly 6, 20262 updates tracked since enumeration

NPPES CertifiedJuly 6, 2026

✔ NPI 1821863481 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyNurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers

Taxonomy Code363L00000X

License✔ Licensed in CA · 95036203

Definition

(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision making and direct accountability for clinical judgment across the health care continuum or in a certified specialty. (2) A registered nurse who has completed additional training beyond basic nursing education and who provides primary health care services in accordance with state nurse practice laws or statutes. Tasks performed by nurse practitioners vary with practice requirements mandated by geographic, political, economic, and social factors. Nurse practitioner specialists include, but are not limited to, family nurse practitioners, gerontological nurse practitioners, pediatric nurse practitioners, obstetric-gynecologic nurse practitioners, and school nurse practitioners.

Also ListedRegistered NurseTaxonomy 163W00000X · License 95253338 (CA)

Also ListedNurse Practitioner · FamilyTaxonomy 363LF0000X · License 95036203 (CA)

300 PASTEUR DR, Stanford, CA 94305

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Secondary Practice Location 1

Location 1847 W Childs AveMerced, CA 95341-6862 · Phone (209) 722-4842

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Tiffany Julia Spencer Dnp, Np is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID8820584543

PECOS Enrollment IDI20260102000521

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94305 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$106.47 typical visit price

range $70.37 – $206.04

Typical copayment $26.61 (range $17.59 – $51.51)

Most-billed visit code 99203

Established Patient

$121.77 typical visit price

range $23.96 – $169.60

Typical copayment $30.44 (range $5.99 – $42.40)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

PRISTA CHARUWORN MD

Internal Medicine (Gastroenterology)

300 PASTEUR DR, ALWAY BUILD M211, MC 5187
STANFORD, CA 94305

Santa Clara County (650) 723-6661

ANDREW CHARLES PICEL M.D

Radiology (Vascular & Interventional Radiology)

300 PASTEUR DR
STANFORD, CA 94305

Santa Clara County (650) 723-4000

MATTHEW A WRIGHT M.D. PH.D.

Psychiatry & Neurology (Psychiatry)

300 PASTEUR DR
STANFORD, CA 94305

Santa Clara County (650) 723-4000

DR. QUAZI ZUBAIR AL-TARIQ M.D.

Radiology (Diagnostic Radiology)

300 PASTEUR DR
STANFORD, CA 94305

Santa Clara County (650) 723-4000

ANGIE DEE MURKINS NP

Nurse Practitioner

300 PASTEUR DR
STANFORD, CA 94305

Santa Clara County (650) 723-4000

DR. JAMSHID GHAJAR MD PHD

Neurological Surgery

300 PASTEUR DR
STANFORD, CA 94305

Santa Clara County (650) 723-4000

SARA BAKHTARY M.D.

Pathology (Anatomic Pathology & Clinical Pathology)

300 PASTEUR DR, LANE 235
STANFORD, CA 94305

Santa Clara County (650) 723-5252

YU KUANG LAI MD

Internal Medicine (Critical Care Medicine)

300 PASTEUR DR
STANFORD, CA 94305

Santa Clara County (650) 723-4000

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Tiffany Spencer's NPI number?

The NPI number for Tiffany Spencer is 1821863481. It was assigned to this individual provider in the NPPES registry on November 22, 2023.

Where is Tiffany Spencer located?

Tiffany Spencer practices at 300 Pasteur Dr, Stanford, CA 94305. The listed phone number is (650) 723-4000.

What is Tiffany Spencer's specialty?

The primary specialty registered for this NPI is Nurse Practitioner with taxonomy code 363L00000X.

Is Tiffany Spencer enrolled in Medicare?

Yes. Tiffany Spencer is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Tiffany Spencer was last updated on July 6, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 37 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.