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SAN MATEO RHEUMATOLOGY INC.
NPI 1104201334
Internal Medicine - Rheumatology in San Mateo, CA

Active since July 29, 2015
101 S SAN MATEO DR, SUITE 307, SAN MATEO, CA 94401(650) 348-6011(650) 348-6027 Get Directions Write a Review

NPPES record last updated: March 5, 2020. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About San Mateo Rheumatology Inc. NPPES

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

SAN MATEO RHEUMATOLOGY INC. (NPI 1104201334) is a healthcare organization registered as a rheumatology in San Mateo, California and active in the NPI registry since July 2015. The organization lists Michael P Stevens, President, as its authorized official.

NPPES Registry Identity

NPI1104201334
Entity TypeOrganization
Primary Taxonomy207RR0500X
Legal Business NameSAN MATEO RHEUMATOLOGY INC.
Location Address101 S SAN MATEO DR, SUITE 307San Mateo, CA 94401-3819
Mailing Address101 S San Mateo Dr, Suite 307San Mateo, CA 94401-3819 · (650) 348-6011 · Fax (650) 348-6027
Phone(650) 348-6011
Fax(650) 348-6027
Organization SubpartNo
Authorized OfficialMichael P StevensPresident · (650) 348-6011
Enumeration DateJuly 29, 2015
Last NPPES UpdateMarch 5, 2020
NPPES CertifiedMarch 5, 2020
✔ NPI 1104201334 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · RheumatologyAllopathic & Osteopathic Physicians
Taxonomy Code207RR0500X
Definition
An internist who treats diseases of joints, muscle, bones and tendons. This specialist diagnoses and treats arthritis, back pain, muscle strains, common athletic injuries and collagen diseases.
101 S SAN MATEO DR, San Mateo, CA 94401
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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)

San Mateo Rheumatology Inc. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

3

Medicare enrollment records show 3 clinicians reassign Medicare billing to San Mateo Rheumatology Inc., which bills Medicare for the services they deliver. Of these, 1 practice at this address and 2 within 10 miles. They are listed nearest first.

Clinicians, nearest first (3)

Michael Stevens, M.D.
Rheumatology
NPI 1932198793
101 S SAN MATEO DR SUITE 307
San Mateo, CA 94401
(650) 348-6011
✔ PECOS✔ Accepts MedicareSame address
Bryan Gescuk, M.D.
Rheumatology
NPI 1295815579
222 W 39TH AVE
San Mateo, CA 94403
(650) 573-2222
✔ PECOS✔ Accepts Medicare9.1 mi
Paul Shiu
Rheumatology
NPI 1508495433
101 S SAN MATEO DR STE 307
San Mateo, CA 94401
(650) 348-6011
✔ PECOS✔ Accepts Medicare12 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 San Mateo Rheumatology Inc.'s NPI number?

The NPI number for San Mateo Rheumatology Inc. is 1104201334. It was assigned to this organization in the NPPES registry on July 29, 2015.

Where is San Mateo Rheumatology Inc. located?

San Mateo Rheumatology Inc. is located at 101 S San Mateo Dr Suite 307, San Mateo, CA 94401. The listed phone number is (650) 348-6011.

What is San Mateo Rheumatology Inc.'s specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Rheumatology, with taxonomy code 207RR0500X.

Is San Mateo Rheumatology Inc. enrolled in Medicare?

Yes. San Mateo Rheumatology Inc. is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through San Mateo Rheumatology Inc.?

According to the CMS Revalidation Reassignment List (October 2026 release), 3 clinicians, all in Rheumatology, reassign their Medicare billing to San Mateo Rheumatology Inc.. 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. Of these, 1 practice at this address and 2 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 San Mateo Rheumatology Inc. was last updated on March 5, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.