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

SHANT STEPHANIAN DO
NPI 1992492375
Internal Medicine in San Mateo, CA

Active since April 18, 2023PECOS Enrolled
50 S SAN MATEO DR, SAN MATEO, CA 94401(650) 652-8370 Get Directions Write a Review

NPPES record last updated: September 30, 2026. Verified against the NPPES registry weekly; last sync: October 11, 2026.

About Shant Stephanian Do NPPES

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

SHANT STEPHANIAN DO (NPI 1992492375) is an individual internal medicine provider in San Mateo, California, licensed in California (A25711) and active in the NPI registry since April 2023. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1992492375
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameSHANT STEPHANIANCredential: DO
Location Address50 S SAN MATEO DRSan Mateo, CA 94401-3857
Mailing AddressPo Box 276950Sacramento, CA 95827-6950 · (650) 652-8500
Phone(650) 652-8370
Sole ProprietorNo
Enumeration DateApril 18, 2023
Last NPPES UpdateSeptember 30, 2026
NPPES CertifiedSeptember 30, 2026
✔ NPI 1992492375 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 · A25711
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.
50 S SAN MATEO DR, San Mateo, CA 94401
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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 (PECOS)

Shant Stephanian Do is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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 94401 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
$153.83 typical visit price
range $69.00 – $202.35
Typical copayment $38.45 (range $17.25 – $50.58)
Most-billed visit code 99204
Established Patient
$119.48 typical visit price
range $23.44 – $166.46
Typical copayment $29.87 (range $5.86 – $41.61)
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.

SOMYA JALAN MD
Pediatrics
50 S SAN MATEO DR
SAN MATEO, CA 94401
San Mateo County (650) 652-8353
DR. STEPHEN BUCHNER MD
Pediatrics
50 S SAN MATEO DR, STE 180
SAN MATEO, CA 94401
San Mateo County (650) 342-4145
DR. GEORGE WILLIAM SHORAGO M.D.
Otolaryngology
50 S SAN MATEO DR, SUITE 320
SAN MATEO, CA 94401
San Mateo County (650) 340-7200
JULIAN HARDY MCLAIN MD
Internal Medicine (Hematology & Oncology)
50 S SAN MATEO DR
SAN MATEO, CA 94401
San Mateo County (650) 696-5420
HOWARD K CHOW MD
Pediatrics
50 S SAN MATEO DR, SUITE 260
SAN MATEO, CA 94401
San Mateo County (650) 579-6500
DENISE MARY ROS
Physician Assistant
50 S SAN MATEO DR
SAN MATEO, CA 94401
San Mateo County (650) 652-8788
JEANNE V BEYMER MD
Pediatrics
50 S SAN MATEO DR, STE 260
SAN MATEO, CA 94401
San Mateo County (650) 579-6500
DR. JOHN ROBERT GRIFFIN M.D.
Surgery (Plastic and Reconstructive Surgery)
50 S SAN MATEO DR, STE 470
SAN MATEO, CA 94401
San Mateo County (650) 652-8239

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 Shant Stephanian's NPI number?

The NPI number for Shant Stephanian is 1992492375. It was assigned to this individual provider in the NPPES registry on April 18, 2023.

Where is Shant Stephanian located?

Shant Stephanian practices at 50 S San Mateo Dr, San Mateo, CA 94401. The listed phone number is (650) 652-8370.

What is Shant Stephanian's specialty?

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

Is Shant Stephanian enrolled in Medicare?

Yes. Shant Stephanian is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Shant Stephanian was last updated on September 30, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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.