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

Dr. Stephanus Joseph Tjan, MD

Individual provider Internal Medicine Physician · NPI 1609888429

Dr. Stephanus Joseph Tjan, MD is an Internal Medicine in Littleton, Colorado. Qualified in 1966, 60 years ago. Practices as a sole proprietor. Licensed in Colorado.

Years since qualifying
60
Licensed in
CO
In the registry since
2006
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

191 E Orchard Rd Ste 203
Littleton, CO 80121-8057
Phone: (303) 459-2150
Fax: (855) 751-4155
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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 49802 (CO)

Record details

NPI number1609888429
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedAugust 12, 2006
Last updated in NPPESJuly 20, 2021
Certification dateJuly 20, 2021

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolOTHER
Graduated 1966 (60 years in practice)
Accepts Medicare assignment Not indicated

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