NPPES file of Aug 9, 2026

William Orlando Hahn, M.D.

Infectious Disease Physician · Seattle, WA

William Orlando Hahn, M.D. is an infectious disease physician with a practice address in Seattle, Washington, and NPI 1164650347, issued on Jun 26, 2009. Check the license (Washington MD60332434, as entered in NPPES) on the Washington Medical Commission; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1164650347
Name
William Orlando Hahn
Credential
M.D.
Primary taxonomy
Infectious Disease Physician 207RI0200X
License number
MD60332434 WA
Self-reported in NPPES; status is on the state search
Practice location
325 9TH Ave, Seattle, WA 98104
Phone
(206) 520-5000
Enumerated
Jun 26, 2009
Record last updated
Nov 1, 2021 (not updated in 5 years: call before relying on the address or phone)
Medicaid ID
1164650347 WA
Medicare enrollment
Enrolled (PECOS I20141103000225); accepts Medicare assignment
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest infectious disease physician records → All 263 in Washington → Look up another NPI →

Also registered at 325 9TH Ave

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Noor Aaf, PA-CMedical Physician Assistant1558394171
  2. Sheida Aalami, M.D.Internal Medicine Physician1730573296
  3. Collette AbbottHospitalist Physician1306208293
  4. Akrm Abdalrahman, MD, MSCritical Care Medicine (Anesthesiology) Physician1801374905
  5. Martin Abdo, COUNSELORCounselor1821202904
  6. Nauzley Abedini, M.D.Hospice and Palliative Medicine (Internal Medicine) Physician1043637408

Verify William Orlando Hahn in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWashington Medical Commission
    Search for license MD60332434    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Washington license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Bills Medicare through one group practice

  1. The Association OF University PhysiciansSeattle, WA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

William Orlando Hahn among 263 infectious disease physician records in Washington

William Orlando Hahn, M.D. is one of 263 infectious disease physician records with a practice address in Washington. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2009, is newer than 62% of them.

  • NPI issued2009 · 62% of these records are older, 34% newer
  • In a Medicare fileYes · 77% of these records are
  • In the CMS Doctors and Clinicians fileYes · 67% of these records are
  • Graduated2009 · median 2005 among the 175 with a school on file
  • Record last updated2021 · 67% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RI0200X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Infectious Disease Physician providers in Washington

There are 263 infectious disease physician records in Washington.

All 263 in Washington → Every provider in Seattle → Infectious Disease Physician nationwide →

The 8 infectious disease physician records with the nearest ZIP codes

  1. Jared Baeten, MDSeattle, WA 981041043201684
  2. Michael Chung, M.D. MPHSeattle, WA 981041891735700
  3. Lynn Connolly, M.D. PHDSeattle, WA 981041720025331
  4. Emily Darby, MDSeattle, WA 981041174638878
  5. Shireesha Dhanireddy, M.D.Seattle, WA 981041568577286
  6. Susan Hoover, MDSeattle, WA 981041487690210
  7. Hyang Kim, M.D.Seattle, WA 981041205876463
  8. Gregory Moss, MDSeattle, WA 981041114914660

Common questions

What is William Orlando Hahn, M.D.'s NPI number?

William Orlando Hahn, M.D.'s National Provider Identifier (NPI) is 1164650347, issued on Jun 26, 2009. An NPI identifies a provider in billing; it is not a license.

Where is William Orlando Hahn, M.D. located?

The NPPES record lists a practice address at 325 9TH Ave, Seattle, WA, 98104. Phone: (206) 520-5000. Providers update this record themselves, so call before visiting.

How can I verify William Orlando Hahn, M.D.'s license?

NPPES lists Washington license number MD60332434, as entered by the provider. Search the Washington Medical Commission at https://wahelms.my.site.com/s/license-search. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.