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SELF
NPI 1306499280
Internal Medicine in San Mateo, CA

Active since July 19, 2019
101 S SAN MATEO DR STE 102, SAN MATEO, CA 94401(650) 435-8211(844) 965-9436 Get Directions Write a Review

NPPES record last updated: March 22, 2021. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Mar 22, 2021, Sep 13, 2019, Jul 19, 2019 (3 updates tracked since 2019).

About Self NPPES

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

SELF (NPI 1306499280) is a healthcare organization registered as an internal medicine in San Mateo, California and active in the NPI registry since July 2019. The organization maintains a secondary practice location in Sunnyvale and lists Seema Sangwan, Owner, as its authorized official.

NPPES Registry Identity

NPI1306499280
Entity TypeOrganization
Primary Taxonomy207R00000X
Legal Business NameSEEMA SANGWAN MD INC A CALIFORNIA PROFESSIONAL CORPORATION
Location Address101 S SAN MATEO DR STE 102San Mateo, CA 94401-3840
Mailing Address11126 Linda Vista DrCupertino, CA 95014-4770 · (650) 799-2957
Phone(650) 435-8211
Fax(844) 965-9436
Organization SubpartNo
Authorized OfficialSeema SangwanOwner · (650) 799-2957
Enumeration DateJuly 19, 2019
Last NPPES UpdateMarch 22, 20213 updates tracked since enumeration
NPPES CertifiedMarch 22, 2021
✔ NPI 1306499280 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
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.
101 S SAN MATEO DR STE 102, San Mateo, CA 94401
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Other Names 1

Other NameSelf

Secondary Practice Location 1

Location 1877 W Fremont Ave Ste N1Sunnyvale, CA 94087-2332 · Phone (408) 900-8077 · Fax (844) 965-9436

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

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

Clinicians Billing Medicare Through This Organization

6

Medicare enrollment records show 6 clinicians reassign Medicare billing to Self, which bills Medicare for the services they deliver. Of these, 3 practice within 10 miles. They are listed nearest first.

Clinicians, nearest first (6)

Gayathri Thirumalaiselvan, M.D
Internal Medicine
NPI 1013120260
2490 HOSPITAL DRIVE SUITE 212
Mountain View, CA 94040
(408) 900-8077
✔ PECOS✔ Accepts Medicare7.2 mi
Anne Cole, M.D.
Internal Medicine
NPI 1922188945
877 W FREMONT AVE SUITE N-1
Sunnyvale, CA 94087
(650) 969-2959
✔ PECOS9.4 mi
Seema Sangwan, M.D.
Internal Medicine
NPI 1952370900
877 W FREMONT AVE SUITE N1
Sunnyvale, CA 94087
(408) 900-8077
✔ PECOS✔ Accepts Medicare9.4 mi
Gurpreet Padam, M.D.
Family Practice
NPI 1932125135
101 S SAN MATEO DR STE 106
San Mateo, CA 94401
(650) 360-9309
✔ PECOS✔ Accepts Medicare12 mi
Priyanka Kallem
Family Practice
NPI 1417114067
5925 W LAS POSITAS BLVD STE 100
Pleasanton, CA 94588
(925) 462-1755
✔ PECOS✔ Accepts Medicare23 mi
Rinky Walia, M.D.
Internal Medicine
NPI 1093042491
101 BODIN CIR
Travis Afb, CA 94535
(707) 423-3000
✔ PECOS✔ Accepts Medicare58 mi

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

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 Seema Sangwan MD Inc A California Professional Corporation's NPI number?

The NPI number for Seema Sangwan MD Inc A California Professional Corporation is 1306499280. It was assigned to this organization in the NPPES registry on July 19, 2019. The provider is also known as Self.

Where is Seema Sangwan MD Inc A California Professional Corporation located?

Seema Sangwan MD Inc A California Professional Corporation is located at 101 S San Mateo Dr Ste 102, San Mateo, CA 94401. The listed phone number is (650) 435-8211.

What is Seema Sangwan MD Inc A California Professional Corporation's specialty?

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

Is Seema Sangwan MD Inc A California Professional Corporation enrolled in Medicare?

Yes. Seema Sangwan MD Inc A California Professional Corporation is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Seema Sangwan MD Inc A California Professional Corporation?

According to the CMS Revalidation Reassignment List (October 2026 release), 6 clinicians in 2 Medicare specialties reassign their Medicare billing to Seema Sangwan MD Inc A California Professional Corporation. A reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for the clinician's services. The largest specialties are Internal Medicine (4) and Family Practice (2). Of these, 3 practice within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Seema Sangwan MD Inc A California Professional Corporation was last updated on March 22, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.