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

Giac Chan Nguyen Tan, MD

Individual provider Undersea and Hyperbaric Medicine (Emergency Medicine) Physician · NPI 1962585042

Giac Chan Nguyen Tan, MD is an Internal Medicine in Waterbury, Connecticut. Qualified in 1984, 42 years ago. Practices with Midstate Medical Center, a 182-clinician group and accepts Medicare assignment. Licensed in Connecticut.

Years since qualifying
42
Licensed in
CT
In the registry since
2006
Specialties on file
3
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

171 Grandview Ave Ste 105
Waterbury, CT 06708-2519
Phone: (203) 694-8200
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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 028148 (CT)
Undersea and Hyperbaric Medicine (Emergency Medicine) Physician Taxonomy 207PE0005X · Licence 028148 (CT)
Emergency Medicine Physician Taxonomy 207P00000X · Licence 028148 (CT)

Record details

NPI number1962585042
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedOctober 23, 2006
Last updated in NPPESFebruary 16, 2022
Certification dateFebruary 16, 2022

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Also practisesCARDIOVASCULAR DISEASE (CARDIOLOGY), GENERAL PRACTICE
Medical schoolOTHER
Graduated 1984 (42 years in practice)
Group practice Midstate Medical Center — 182 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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