Quick answers
- Where does Sisom Osia see patients?
- Medicare's clinician data lists 1 practice location in Upper Marlboro, MD. Call before your visit to confirm the address.
- What is Sisom Osia's specialty?
- Medicare lists Internal Medicine as the primary specialty, and also Emergency Medicine.
- Does Sisom Osia accept Medicare assignment?
- Yes. Medicare's clinician data says Sisom Osia 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.
- Does Sisom Osia offer telehealth?
- Medicare's clinician data says Sisom Osia offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Sisom Osia?
- (301) 599-7010, as listed in official Medicare / NPI Registry data.
- What is Sisom Osia's NPI number?
- 1154442366. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Sisom Osia is enrolled with Medicare (CMS data updated 2026-10-02).
- 9628 Marlboro PikeUpper Marlboro, MD 20772 (301) 599‑7010
Specialties
- Internal Medicineprimary
- Emergency Medicinealso
Other internal medicine doctors in Upper Marlboro
Clinicians with the same Medicare primary specialty in Upper Marlboro, MD — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1979 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1154442366 |
| 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
- 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