Quick answers
- Which hospitals does Usama Yassi work at?
- Medicare's official clinician data lists Usama Yassi at 5 hospitals: Ascension St John Medical Center, Hillcrest Hospital South, Hillcrest Medical Center, Northeastern Health System and Oklahoma Surgical Hospital, LLC. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Usama Yassi see patients?
- Medicare's clinician data lists 2 practice locations, including Tulsa, OK. Call before your visit to confirm the address.
- What is Usama Yassi's specialty?
- Medicare lists Pathology as the primary specialty.
- Does Usama Yassi accept Medicare assignment?
- Yes. Medicare's clinician data says Usama Yassi 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 Usama Yassi?
- (918) 744-3131, as listed in official Medicare / NPI Registry data.
- What is Usama Yassi's NPI number?
- 1336482009. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Usama Yassi works
Medicare's Facility Affiliation Data lists Usama Yassi at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Ascension St John Medical CenterTulsa, OK · Acute Care Hospital · CCN 370114
- Hillcrest Hospital SouthTulsa, OK · Acute Care Hospital · CCN 370202
- Hillcrest Medical CenterTulsa, OK · Acute Care Hospital · CCN 370001
- Northeastern Health SystemTahlequah, OK · Acute Care Hospital · CCN 370089
- Oklahoma Surgical Hospital, LLCTulsa, OK · Acute Care Hospital · CCN 370210
Practice locations
Addresses where Usama Yassi is enrolled with Medicare (CMS data updated 2026-10-02).
- 1923 S Utica AveTulsa, OK 74104 (918) 744‑3131
- 4142 S Mingo RdTulsa, OK 74146 (918) 417‑6400
Group practices
Medicare enrollment lists Usama Yassi as a member of this group (CMS data updated 2026-10-02).
- Pathology Laboratory Associates, Inc.25 clinicians in the group
Specialties
- Pathologyprimary
Other pathologists in Tulsa
Clinicians with the same Medicare primary specialty in Tulsa, OK — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2024 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1336482009 |
| 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