Quick answers
- Does Leighanna Ounanian accept Medicare assignment?
- Yes. Medicare's clinician data says Leighanna Ounanian accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Leighanna Ounanian see?
- In 2024, CMS data shows 422 Original Medicare patients and 4,569 services for Leighanna Ounanian. This counts Original Medicare only and measures volume, not quality.
- What is Leighanna Ounanian's NPI number?
- 1699253633. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Leighanna Ounanian, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 422 |
|---|---|
| Services billed to Medicare | 4,569 |
| Different services or procedures | 38 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Insertion of needle into vein for collection of blood sample (36415)790 services
- Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count (85025)766 services
- Blood test, comprehensive group of blood chemicals (80053)764 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)756 services
- Immunologic analysis for detection of tumor antigen, quantitative; ca 15-3 (86300)211 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High cholesterol75%
- High blood pressure70%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)64%
- Arthritis47%
- Ischemic heart disease28%
- Anxiety23%
Hospitals where Leighanna Ounanian works
Medicare's Facility Affiliation Data lists Leighanna Ounanian at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Baylor Regional Medical Center at PlanoPlano, TX · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 450890
- Baylor Scott and White Medical Center McKinneyMcKinney, TX · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 670082
Practice locations
Addresses where Leighanna Ounanian is enrolled with Medicare (CMS data updated October 2, 2026).
- 1631 Lancaster Dr, Suite 150Grapevine, TX 76051 (817) 251‑9080
- 4708 Alliance Blvd, Suite 150Plano, TX 75093 (972) 596‑7801
Group practices
Medicare enrollment lists Leighanna Ounanian as a member of this group (CMS data updated October 2, 2026).
- Texas Oncology PA1,014 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Grapevine
Clinicians with the same Medicare primary specialty in Grapevine, TX — not a recommendation.
Other clinicians in Texas Oncology PA
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2018 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1699253633 |
| 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 October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- 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