Quick answers
- Which hospitals does Douglas Tsai work at?
- Medicare's official clinician data lists Douglas Tsai at 5 hospitals: Bayhealth Hospital, Sussex Campus, Mercy Catholic Medical Center- Mercy Fitzgerald, Nazareth Hospital, St Francis Hospital and St Mary Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Douglas Tsai see patients?
- Medicare's clinician data lists 5 practice locations, including Darby, PA, Wilmington, DE and Dover, DE. Call before your visit to confirm the address.
- What is Douglas Tsai's specialty?
- Medicare lists Diagnostic Radiology as the primary specialty, and also Interventional Radiology.
- Does Douglas Tsai accept Medicare assignment?
- Yes. Medicare's clinician data says Douglas Tsai accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Douglas Tsai?
- (610) 237-4814, as listed in official Medicare / NPI Registry data.
- What is Douglas Tsai's NPI number?
- 1841492873. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Douglas Tsai works
Medicare's Facility Affiliation Data lists Douglas Tsai at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Bayhealth Hospital, Sussex CampusMilford, DE · Acute Care Hospital · CCN 080009
- Mercy Catholic Medical Center- Mercy FitzgeraldDarby, PA · Acute Care Hospital · CCN 390156
- Nazareth HospitalPhiladelphia, PA · Acute Care Hospital · CCN 390204
- St Francis HospitalWilmington, DE · Acute Care Hospital · CCN 080003
- St Mary Medical CenterLanghorne, PA · Acute Care Hospital · CCN 390258
Practice locations
Addresses where Douglas Tsai is enrolled with Medicare (CMS data updated 2026-10-02).
- 1500 Lansdowne AveDarby, PA 19023 (610) 237‑4814
- 2002 Foulk RdWilmington, DE 19810 (610) 237‑4814
- 640 S State StDover, DE 19901 (610) 892‑8889
- 701 N Clayton StWilmington, DE 19805 (610) 237‑4814
- 945 Chesterbrook BlvdChesterbrook, PA 19087 (610) 273‑5320
Group practices
Medicare enrollment lists Douglas Tsai as a member of these groups (CMS data updated 2026-10-02).
- The Centers for Advanced Urology LLP145 clinicians in the group
- Bayhealth Radiologists LLC92 clinicians in the group
- Mercy Diagnostic Imaging PC90 clinicians in the group
Specialties
- Diagnostic Radiologyprimary
- Interventional Radiologyalso
Other radiologists in Darby
Clinicians with the same Medicare primary specialty in Darby, PA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2002 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1841492873 |
| 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