Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Alvin Raymond Co Tan, MD

Individual provider Nephrology Physician · NPI 1093178725

Alvin Raymond Co Tan, MD practises Internal Medicine in Katy, Texas. Qualified in 1995, 31 years ago. Practices with Kelsey-Seybold Medical Group, PLLC, a 942-clinician group and accepts Medicare assignment. Licensed in Texas.

Years since qualifying
31
Licensed in
TX
In the registry since
2016
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

2510 W Grand Pkwy N
Katy, TX 77449-2853
Phone: (713) 442-4222
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence P6925 (TX)
Nephrology Physician Taxonomy 207RN0300X · Licence P6925 (TX)

Record details

NPI number1093178725
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMarch 31, 2016
Last updated in NPPESJune 22, 2021
Certification dateJune 22, 2021

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyINTERNAL MEDICINE
Also practisesNEPHROLOGY
Medical schoolOTHER
Graduated 1995 (31 years in practice)
Group practice Kelsey-Seybold Medical Group, Pllc — 942 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients11
Services billed 47 a service is one billed item, such as a visit, a test or a procedure
Average patient age71

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Colleagues at Kelsey-Seybold Medical Group, PLLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 942 clinicians in the practice; 12 are shown here.

Other providers in Katy