Quick answers
- Which hospitals does Okay A. Onan work at?
- Medicare's official clinician data lists Okay A. Onan at 2 hospitals: Ascension Seton Medical Center Austin and Round Rock Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Okay A. Onan see patients?
- Medicare's clinician data lists 1 practice location in Austin, TX. Call before your visit to confirm the address.
- What is Okay A. Onan's specialty?
- Medicare lists Orthopedic Surgery as the primary specialty.
- Does Okay A. Onan accept Medicare assignment?
- Yes. Medicare's clinician data says Okay A. Onan 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 Okay A. Onan?
- (512) 439-1000, as listed in official Medicare / NPI Registry data.
- What is Okay A. Onan's NPI number?
- 1841297843. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Okay A. Onan works
Medicare's Facility Affiliation Data lists Okay A. Onan at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Ascension Seton Medical Center AustinAustin, TX · Acute Care Hospital · CCN 450056
- Round Rock Medical CenterRound Rock, TX · Acute Care Hospital · CCN 450718
Practice locations
Addresses where Okay A. Onan is enrolled with Medicare (CMS data updated 2026-10-02).
- 4700 Seton Ctr Pkwy, Suite 200Austin, TX 78759 (512) 439‑1000
Group practices
Medicare enrollment lists Okay A. Onan as a member of this group (CMS data updated 2026-10-02).
- Ortholonestar PLLC428 clinicians in the group
Specialties
- Orthopedic Surgeryprimary
Other orthopedic surgeons in Austin
Clinicians with the same Medicare primary specialty in Austin, TX — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Baylor College Of Medicine |
| Graduation year | 1995 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1841297843 |
| 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