NPI age
11 years
Enumerated 2015-04-20
● Active
Type 1 · Individual
Cathy Mei Tsin, MD
Tsin is 1 of 3 pediatrics providers in San Antonio and 1 of 41 in Texas.
Primary specialty
Pediatrics
Plus 3 subspecialties
Licensed in
TX, CA
2 states
Status
Active
No deactivations on record
Last NPPES update
2025-10-01
Source: monthly bulk 2026-05
Sole proprietor
No
May be part of a larger org
How this provider compares
Across 41 active pediatrics providers in Texas.
NPI age
11 years
↓ 3 yr below median (14 yr)
State licenses
2 states
Top 85% — 14% of peers are multi-state
Subspecialties
1
In the 61% of peers with subspecialties
NPI lifetime · 2015 → 2026
2015-04Enumerated in NPPES
2015
2026
Where they practice
Practice location
333 N Santa Rosa
San Antonio, TX 782073108
Mailing address
315 N San Saba Ste 1135
San Antonio, TX 782073255
Additional practice locations
1 secondary location on file with NPPES.
Location 2
725 Welch Rd
Palo Alto, CA 943041601
Specialties
-
Pediatrics PrimaryA 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.
-
PediatricsA pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectrum of health services ranging from preventive healthcare to the diagnosis and treatment...
Practice context
Part of a multi-provider practice. 246 other active providers share this practice address in NPPES.
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