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DR. JASON ROMAN WARREN M.D.
NPI 1114279080
Internal Medicine in Stanford, CA

Active since October 02, 2012PECOS EnrolledAccepts Medicare Assignment
300 PASTEUR DR, BUILDING # 334, STANFORD, CA 94305(650) 723-4000 Get Directions Write a Review

NPPES record last updated: December 8, 2021. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Dr. Jason Roman Warren M.d. NPPES

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

DR. JASON ROMAN WARREN M.D. (NPI 1114279080) is an individual internal medicine provider in Stanford, California, licensed in California (A117866) and active in the NPI registry since October 2012. He is enrolled in Medicare PECOS and is a graduate of University Of California, Irvine, California College Of Medicine (2010).

NPPES Registry Identity

NPI1114279080
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. JASON ROMAN WARRENCredential: M.D.
Location Address300 PASTEUR DR, BUILDING # 334Stanford, CA 94305-2200
Mailing Address300 Pasteur Dr, Building # 334Stanford, CA 94305-2200 · (650) 723-4000
Phone(650) 723-4000
Sole ProprietorNo
Medical School CMSUniversity Of California, Irvine, California College Of MedicineGraduated 2010
Enumeration DateOctober 2, 2012
Last NPPES UpdateDecember 8, 2021
✔ NPI 1114279080 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in CA · A117866
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
300 PASTEUR DR, Stanford, CA 94305
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Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Jason Roman Warren M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID1658503594
PECOS Enrollment IDI20160901002638
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
$156.67 typical visit price
range $70.37 – $206.04
Typical copayment $39.16 (range $17.59 – $51.51)
Most-billed visit code 99204
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 Jason Warren's NPI number?

The NPI number for Jason Warren is 1114279080. It was assigned to this individual provider in the NPPES registry on October 2, 2012.

Where is Jason Warren located?

Jason Warren practices at 300 Pasteur Dr Building # 334, Stanford, CA 94305. The listed phone number is (650) 723-4000.

What is Jason Warren's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Jason Warren enrolled in Medicare?

Yes. Jason Warren is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

When was this NPI record last updated?

The NPPES record for Jason Warren was last updated on December 8, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 years 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.