Peggy Knowles, ARNP
NPI 1821468448 · Primary Care Nurse Practitioner · Vancouver, WA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Peggy Knowles, ARNP is a Primary Care Nurse Practitioner provider in Vancouver, WA (NPI 1821468448).
Provider details
- NPI number
- 1821468448
- Entity type
- Individual
- Primary specialty
- Primary Care Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- ARNP
- Sex
- Female
- Sole proprietor
- Yes
- License
- RN60511802 (WA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Nursing Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
10 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 8 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Sertraline Hcl | 34 |
| Trazodone Hcl | 22 |
| Metoprolol Tartrate | 21 |
| Quetiapine Fumarate | 20 |
| Furosemide | 19 |
| Omeprazole | 19 |
| Metolazone | 16 |
| Levothyroxine Sodium | 12 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means , never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Registry dates
- Enumerated
- 2015-09-25
- Last updated
- 2024-10-08
- Certified
- 2024-10-08
Frequently asked questions
- What is Peggy Knowles's NPI number?
- Peggy Knowles's National Provider Identifier (NPI) is 1821468448, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Peggy Knowles's specialty?
- Peggy Knowles is listed in the NPPES registry with a primary specialty of Primary Care Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Peggy Knowles located?
- Peggy Knowles's practice location on file with NPPES is 415 Se 177th Ave, Vancouver, WA 98683-4201.
- What is Peggy Knowles's phone number?
- The practice phone number listed in the NPPES registry for Peggy Knowles is (360) 980-2441.
- Does Peggy Knowles accept Medicare?
- Peggy Knowles is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Peggy Knowles's NPI active?
- Yes — Peggy Knowles's NPI (1821468448) is active in the NPPES registry as of the last update on 2024-10-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.