Margaret Hennessey, FNP
NPI 1225328248 · Family Nurse Practitioner · Olympia, WA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Margaret Hennessey, FNP is a Family Nurse Practitioner provider in Olympia, WA (NPI 1225328248).
Provider details
- NPI number
- 1225328248
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- FNP
- Sex
- Female
- Sole proprietor
- No
- License
- AP60127191 (WA)
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
15 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
476 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 | 243 | $108 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 154 | $76 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 41 | $110 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 38 | $151 |
Typical Medicare-allowed amounts for these services range $76–$151 (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 · 73 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 220 | 41 |
| Atorvastatin Calcium | 181 | 50 |
| Losartan Potassium | 138 | 35 |
| Lisinopril | 131 | 36 |
| Rosuvastatin Calcium | 101 | 28 |
| Gabapentin | 93 | 27 |
| Amlodipine Besylate |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$305 across 16 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
Additional practice locations (1)
- 1740 Cooks Hill RdCentralia, WA 98531-9071Phone: (360) 736-7623Fax: (360) 736-4497
Registry dates
- Enumerated
- 2011-04-11
- Last updated
- 2024-12-12
- Certified
- 2024-12-12
Frequently asked questions
- What is Margaret Hennessey's NPI number?
- Margaret Hennessey's National Provider Identifier (NPI) is 1225328248, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Margaret Hennessey's specialty?
- Margaret Hennessey is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Margaret Hennessey located?
- Margaret Hennessey's practice location on file with NPPES is 404 Yauger Way Sw Ste 100, Olympia, WA 98502-8152.
- What is Margaret Hennessey's phone number?
- The practice phone number listed in the NPPES registry for Margaret Hennessey is (564) 669-5150.
- Does Margaret Hennessey accept Medicare?
- Margaret Hennessey is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Margaret Hennessey's NPI active?
- Yes — Margaret Hennessey's NPI (1225328248) is active in the NPPES registry as of the last update on 2024-12-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.