Nathan Mercer, MD
Hospitalist Physician · Seattle, WA
Nathan Mercer, MD is a hospitalist physician with a practice address in Seattle, Washington, and NPI 1497255178, issued on Feb 19, 2018. Check the license (Washington MD61552788, as entered in NPPES) on the Washington Medical Commission; the Medicare figures below come from public CMS files.
- Name
- Nathan Mercer
- Credential
- MD
- Primary taxonomy
- Hospitalist Physician 208M00000X
- License numbers
- MD61552788 WA
0101267697 VA
Self-reported in NPPES; status is on the state search - Practice location
- 925 Seneca St, Seattle, WA 98101
- Phone
- (206) 625-7373
- Enumerated
- Feb 19, 2018
- Record last updated
- Aug 7, 2025
- Medicare enrollment
- Enrolled (PECOS I20250513000396); accepts Medicare assignment
- Medical or professional school
- University Of Toledo College Of Medicine, 2018
- Entity
- Type 1 · individual
8 nearest hospitalist physician records → All 793 in Washington → Look up another NPI →
Also registered at 925 Seneca St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jonathan Abe, MDInternal Medicine Physician1346090875
- Katherine Adler, MDInternal Medicine Physician1841418886
- Sanjhavi AgarwalStudent in an Organized Health Care Education/Training Program1902410053
- Jason Agtarap, MDStudent in an Organized Health Care Education/Training Program1194576181
- Shani AharonStudent in an Organized Health Care Education/Training Program1316526650
- Mohammad Ahmed, DOHospitalist Physician1063819381
Verify Nathan Mercer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWashington Medical Commission
Search for license MD61552788Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
One hospital affiliation
- Virginia Mason Medical CenterSeattle, WA · Acute Care Hospitals5 of 5 stars
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Nathan Mercer among 793 hospitalist physician records in Washington
Nathan Mercer, MD is one of 793 hospitalist physician records with a practice address in Washington. 88% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2018, is newer than 74% of them.
- NPI issued2018 · 74% of these records are older, 20% newer
- In a Medicare fileYes · 88% of these records are
- In the CMS Doctors and Clinicians fileYes · 82% of these records are
- Graduated2018 · median 2011 among the 649 with a school on file
- Record last updated2025 · 45% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208M00000X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hospitalist Physician providers in Washington
There are 793 hospitalist physician records in Washington.
All 793 in Washington → Every provider in Seattle → Hospitalist Physician nationwide →
The 8 hospitalist physician records with the nearest ZIP codes
- Barry Aaronson, MDSeattle, WA 981011952418345
- Roger Bush, MDSeattle, WA 981011760411623
- Alvin Calderon, MDSeattle, WA 981011609985753
- Daniel Coates, MDSeattle, WA 981011730100074
- Richard Davis, MDSeattle, WA 981011720018781
- Brandee Grooms, MDSeattle, WA 981011669481925
- Thomas Gunby, MDSeattle, WA 981011144243668
- Daniel Hanson, MDSeattle, WA 981011841300167
Common questions
What is Nathan Mercer, MD's NPI number?
Nathan Mercer, MD's National Provider Identifier (NPI) is 1497255178, issued on Feb 19, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Nathan Mercer, MD located?
The NPPES record lists a practice address at 925 Seneca St, Seattle, WA, 98101. Phone: (206) 625-7373. Providers update this record themselves, so call before visiting.
How can I verify Nathan Mercer, MD's license?
NPPES lists Washington license number MD61552788, 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.
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.