Quick answers
- Which hospitals does Stephanus J. Tjan work at?
- Medicare's official clinician data lists Stephanus J. Tjan at 2 hospitals: AdventHealth Littleton and AdventHealth Porter. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Stephanus J. Tjan see patients?
- Medicare's clinician data lists 1 practice location in Littleton, CO. Call before your visit to confirm the address.
- What is Stephanus J. Tjan's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Stephanus J. Tjan accept Medicare assignment?
- Medicare's clinician data says Stephanus J. Tjan may accept Medicare assignment (as of 2026-10-02). Ask the office whether they accept it for your visit.
- What is the phone number for Stephanus J. Tjan?
- (303) 459-2150, as listed in official Medicare / NPI Registry data.
- What is Stephanus J. Tjan's NPI number?
- 1609888429. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Stephanus J. Tjan works
Medicare's Facility Affiliation Data lists Stephanus J. Tjan at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- AdventHealth LittletonLittleton, CO · Acute Care Hospital · CCN 060113
- AdventHealth PorterDenver, CO · Acute Care Hospital · CCN 060064
Practice locations
Addresses where Stephanus J. Tjan is enrolled with Medicare (CMS data updated 2026-10-02).
- 191 E Orchard Rd, Suite 203Littleton, CO 80121 (303) 459‑2150
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Littleton
Clinicians with the same Medicare primary specialty in Littleton, CO — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1966 |
| Gender (as listed) | Male |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1609888429 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians