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

Dr. Timothy M. Hsieh, MD

Individual provider Geriatric Medicine (Internal Medicine) Physician · NPI 1265423883

Dr. Timothy M. Hsieh, MD is an Internal Medicine in Tahlequah, Oklahoma. Graduated from New York Medical College in 1998, 28 years ago. Practices with Cherokee Nation, a 448-clinician group and accepts Medicare assignment. Licensed in New York.

Years since qualifying
28
Trained at
New York Medical College
Licensed in
NY
In the registry since
2005
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

100 S Bliss Ave
Tahlequah, OK 74464-2512
Phone: (918) 458-3110
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Geriatric Medicine (Internal Medicine) Physician (primary) Taxonomy 207RG0300X · Licence 220511 (NY)

Record details

NPI number1265423883
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedNovember 2, 2005
Last updated in NPPESJanuary 11, 2011

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Also practisesGERIATRIC MEDICINE
Medical schoolNEW YORK MEDICAL COLLEGE
Graduated 1998 (28 years in practice)
Group practice Cherokee Nation — 448 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare