CATHY MEI TSIN MD
NPI 1275920092
Pediatrics - Pediatric Rheumatology in San Antonio, TX

Q: What is Cathy Tsin's NPI number?

The NPI number for Cathy Tsin is 1275920092. It was assigned to this individual provider in the NPPES registry on April 20, 2015.

Q: What is Cathy Tsin's specialty?

The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Rheumatology, with taxonomy code 2080P0216X.

Q: When was this NPI record last updated?

The NPPES record for Cathy Tsin was last updated on October 1, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 months 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 April 20, 2015PECOS Enrolled

333 N SANTA ROSA, SAN ANTONIO, TX 78207(210) 704-3030 Get Directions Write a Review

NPPES record last updated: October 1, 2025. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Apr 11, 2024, Jul 14, 2023, Jun 14, 2023 and 3 more (6 updates tracked since 2018).

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About Cathy Mei Tsin Md NPPES

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

CATHY MEI TSIN MD (NPI 1275920092) is an individual pediatric rheumatology provider in San Antonio, Texas, licensed in Texas (W1516) and active in the NPI registry since April 2015. She is enrolled in Medicare PECOS, maintains a secondary practice location in Palo Alto, and is a graduate of Other (2015).

NPPES Registry Identity

NPI1275920092

Entity TypeIndividualFemale

Primary Taxonomy2080P0216X

Provider Legal NameCATHY MEI TSINCredential: MD

Location Address333 N SANTA ROSASan Antonio, TX 78207-3108

Mailing Address315 N San Saba Ste 1135San Antonio, TX 78207-3255 · (210) 704-4275

Phone(210) 704-3030

Sole ProprietorNo

Medical School CMSOtherGraduated 2015

Enumeration DateApril 20, 2015

Last NPPES UpdateOctober 1, 20256 updates tracked since enumeration

NPPES CertifiedOctober 1, 2025

✔ NPI 1275920092 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPediatrics · Pediatric RheumatologyAllopathic & Osteopathic Physicians

Taxonomy Code2080P0216X

Licenses✔ Licensed in TX · W1516✔ Licensed in CA · A168568

Definition

A pediatrician who treats diseases of joints, muscle, bones and tendons. A pediatric rheumatologist diagnoses and treats arthritis, back pain, muscle strains, common athletic injuries and collagen diseases.

Also ListedPediatricsTaxonomy 208000000X · License W1516 (TX), A168568 (CA)

333 N SANTA ROSA, San Antonio, TX 78207

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Secondary Practice Location 1

Location 1725 Welch RdPalo Alto, CA 94304-1601 · Phone (650) 497-8000

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Oscar Insurance Company.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Cathy Mei Tsin Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID3678829751

PECOS Enrollment IDI20251013003882

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.

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.

LATHA PRASANNAN MD

Pediatrics (Pediatric Hematology-Oncology)