Ilona Willyard, PMHNP-BC
NPI 1154687697 · Psychiatric/Mental Health Nurse Practitioner · Owasso, OK
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ilona Willyard, PMHNP-BC is a Psychiatric/Mental Health Nurse Practitioner provider in Owasso, OK (NPI 1154687697).
Provider details
- NPI number
- 1154687697
- Entity type
- Individual
- Primary specialty
- Psychiatric/Mental Health Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PMHNP-BC
- Sex
- Female
- Sole proprietor
- No
- License
- 90504 (OK)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
14 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
56 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 45 | $79 |
| Psychiatric Diagnostic Evaluation With Medical Services90792 | 11 | $141 |
Typical Medicare-allowed amounts for these services range $79–$141 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 10 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Bupropion Hclbrand: Bupropion Xl | 24 |
| Venlafaxine Hclbrand: Venlafaxine Hcl Er | 22 |
| Buspirone Hcl | 19 |
| Lamotrigine | 17 |
| Duloxetine Hcl | 16 |
| Aripiprazole | 13 |
| Diazepam | 12 |
| Lithium Carbonate | 12 |
| Quetiapine Fumarate | 11 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$802 across 43 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2012-04-10
- Last updated
- 2025-02-04
- Certified
- 2025-02-04
Frequently asked questions
- What is Ilona Willyard's NPI number?
- Ilona Willyard's National Provider Identifier (NPI) is 1154687697, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ilona Willyard's specialty?
- Ilona Willyard is listed in the NPPES registry with a primary specialty of Psychiatric/Mental Health Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Ilona Willyard located?
- Ilona Willyard's practice location on file with NPPES is 8418 N 123rd East Ave, Owasso, OK 74055-2139.
- What is Ilona Willyard's phone number?
- The practice phone number listed in the NPPES registry for Ilona Willyard is (918) 858-4353.
- Does Ilona Willyard accept Medicare?
- Ilona Willyard is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ilona Willyard's NPI active?
- Yes — Ilona Willyard's NPI (1154687697) is active in the NPPES registry as of the last update on 2025-02-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.