Fred S. Herzon, M.D.
Otolaryngology Physician · Seattle, WA
Fred S. Herzon, M.D. is an otolaryngology physician with a practice address in Seattle, Washington, and NPI 1558346072, issued on Dec 7, 2005. Check the license (Washington MD00042135, as entered in NPPES) on the Washington Medical Commission; the Medicare figures below come from public CMS files.
- Name
- Fred S. Herzon
- Credential
- M.D.
- Primary taxonomy
- Otolaryngology Physician 207Y00000X
- License number
- MD00042135 WA
Self-reported in NPPES; status is on the state search - Practice location
- 1101 Madison St, Seattle, WA 98104
- Phone
- (206) 505-1101
- Enumerated
- Dec 7, 2005
- Record last updated
- Jul 13, 2026
- Fax
- (206) 505-1041
- Medicaid ID
- 8438384 WA
- Entity
- Type 1 · individual
8 nearest otolaryngology physician records → All 305 in Washington → Look up another NPI →
Also registered at 1101 Madison St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Robert Ballard, MDOtolaryngology Physician1508854449
Verify Fred S. Herzon in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWashington Medical Commission
Search for license MD00042135Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
97% fewer Medicare Part D claims than the average otolaryngology physician in 2024
17 Medicare Part D claims, against an average of 541 among the 8,339 providers of this specialty who prescribed in Part D.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Fred S. Herzon among 305 otolaryngology physician records in Washington
Fred S. Herzon, M.D. is one of 305 otolaryngology physician records with a practice address in Washington. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 90% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileNo · 65% of these records are
- Record last updated2026 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Y00000X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Otolaryngology Physician providers in Washington
There are 305 otolaryngology physician records in Washington.
All 305 in Washington → Every provider in Seattle → Otolaryngology Physician nationwide →
The 8 otolaryngology physician records with the nearest ZIP codes
- Robert Ballard, MDSeattle, WA 981041508854449
- Dewayne Bradley, MDSeattle, WA 981041144339276
- Mien-Chi Chen, M.D.Seattle, WA 981041407822679
- Felix Chu, MDSeattle, WA 981041568496123
- Namou Kim, MDSeattle, WA 981041336125798
- Calvin Knapp, MDSeattle, WA 981041841258019
- Thomas Lamperti, MDSeattle, WA 981041780673392
- Kathleen Makielski, M.D.Seattle, WA 981041023085248
Common questions
What is Fred S. Herzon, M.D.'s NPI number?
Fred S. Herzon, M.D.'s National Provider Identifier (NPI) is 1558346072, issued on Dec 7, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Fred S. Herzon, M.D. located?
The NPPES record lists a practice address at 1101 Madison St, Seattle, WA, 98104. Phone: (206) 505-1101. Providers update this record themselves, so call before visiting.
How can I verify Fred S. Herzon, M.D.'s license?
NPPES lists Washington license number MD00042135, 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.
How much does Fred S. Herzon, M.D. prescribe under Medicare Part D?
In 2024, Fred S. Herzon, M.D. had 17 Medicare Part D claims; the average among otolaryngology physician prescribers was 541. Part D covers Medicare prescriptions only.
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.