Aynsley Duncan, MD
NPI 1548623994 · Internal Medicine Physician · Seattle, WA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Aynsley Duncan, MD is a Internal Medicine Physician provider in Seattle, WA (NPI 1548623994).
Provider details
- NPI number
- 1548623994
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
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
83% 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 · 32 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 68 | 15 |
| Naltrexone Hcl | 56 | — |
| Famotidine | 54 | — |
| Amlodipine Besylate | 52 | — |
| Levothyroxine Sodium | 47 | — |
| Metoprolol Succinate | 41 | — |
| Losartan Potassium |
Practice location
Mailing address
Registry dates
- Enumerated
- 2016-04-02
- Last updated
- 2019-06-25
Frequently asked questions
- What is Aynsley Duncan's NPI number?
- Aynsley Duncan's National Provider Identifier (NPI) is 1548623994, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Aynsley Duncan's specialty?
- Aynsley Duncan is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Aynsley Duncan located?
- Aynsley Duncan's practice location on file with NPPES is 325 9th Ave, Seattle, WA 98104-2420.
- What is Aynsley Duncan's phone number?
- The practice phone number listed in the NPPES registry for Aynsley Duncan is (206) 744-5865.
- Does Aynsley Duncan accept Medicare?
- Aynsley Duncan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Aynsley Duncan's NPI active?
- Yes — Aynsley Duncan's NPI (1548623994) is active in the NPPES registry as of the last update on 2019-06-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.