William Hahn, M.D.
NPI 1164650347 · Infectious Disease Physician · Seattle, WA
Enrolled with Medicare as Practitioner - Infectious Disease · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Hahn, M.D. is a Infectious Disease Physician provider in Seattle, WA (NPI 1164650347).
Provider details
- NPI number
- 1164650347
- Entity type
- Individual
- Primary specialty
- Infectious Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- MD60332434 (WA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
16 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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2009-06-26
- Last updated
- 2021-11-01
- Certified
- 2021-11-01
Frequently asked questions
- What is William Hahn's NPI number?
- William Hahn's National Provider Identifier (NPI) is 1164650347, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Hahn's specialty?
- William Hahn is listed in the NPPES registry with a primary specialty of Infectious Disease Physician (Allopathic & Osteopathic Physicians).
- Where is William Hahn located?
- William Hahn's practice location on file with NPPES is 325 9th Ave, Seattle, WA 98104-2420.
- What is William Hahn's phone number?
- The practice phone number listed in the NPPES registry for William Hahn is (206) 520-5000.
- Does William Hahn accept Medicare?
- William Hahn is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Hahn's NPI active?
- Yes — William Hahn's NPI (1164650347) is active in the NPPES registry as of the last update on 2021-11-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.