Quick answers
- Which hospitals does Greta A. Warta work at?
- Medicare's official clinician data lists Greta A. Warta at 4 hospitals: Ascension St John Broken Arrow, Ascension St John Medical Center, Ascension St John Sapulpa and St John Owasso. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Greta A. Warta see patients?
- Medicare's clinician data lists 4 practice locations, including Broken Arrow, OK and Tulsa, OK. Call before your visit to confirm the address.
- What is Greta A. Warta's specialty?
- Medicare lists Cardiovascular Disease (Cardiology) as the primary specialty, and also Internal Medicine.
- Does Greta A. Warta accept Medicare assignment?
- Yes. Medicare's clinician data says Greta A. Warta 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 Greta A. Warta offer telehealth?
- Medicare's clinician data says Greta A. Warta offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Greta A. Warta?
- (918) 994-8000, as listed in official Medicare / NPI Registry data.
- What is Greta A. Warta's NPI number?
- 1689885733. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Greta A. Warta works
Medicare's Facility Affiliation Data lists Greta A. Warta 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 Broken ArrowBroken Arrow, OK · Acute Care Hospital · CCN 370235
- Ascension St John Medical CenterTulsa, OK · Acute Care Hospital · CCN 370114
- Ascension St John SapulpaSapulpa, OK · Critical Access Hospital · CCN 371312
- St John OwassoOwasso, OK · Acute Care Hospital · CCN 370227
Practice locations
Addresses where Greta A. Warta is enrolled with Medicare (CMS data updated 2026-10-02).
- 1000 W Boise Circle, Emergency RoomBroken Arrow, OK 74012 (918) 994‑8000
- 1705 E 19th StTulsa, OK 74104
- 1923 S Utica AveTulsa, OK 74104 (918) 744‑2071
- 1923 S Utica Ave, Medical Staff OfficeTulsa, OK 74104
Group practices
Medicare enrollment lists Greta A. Warta as a member of this group (CMS data updated 2026-10-02).
- St. John Physicians, Inc.259 clinicians in the group
Specialties
Find other Cardiovascular Disease (Cardiology) doctors in Oklahoma →
Other cardiologists in Broken Arrow
Clinicians with the same Medicare primary specialty in Broken Arrow, OK — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | Oklahoma State University College Of Osteopathic Medicine |
| Graduation year | 2003 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1689885733 |
| 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