John C.h. Byon, MD
Hematology & Oncology Physician · Seattle, WA
John C.h. Byon, MD is a hematology & oncology physician with a practice address in Seattle, Washington, and NPI 1295848018, issued on Aug 16, 2006. Check the license (Washington MD00045091, as entered in NPPES) on the Washington Medical Commission; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- John C.h. Byon
- Credential
- MD
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- MD00045091 WA
Self-reported in NPPES; status is on the state search - Practice location
- 1705 NE Pacific St, Seattle, WA 98195
- Phone
- (206) 543-2368
- Enumerated
- Aug 16, 2006
- Record last updated
- Jun 2, 2009 (not updated in 17 years: call before relying on the address or phone)
- Fax
- (206) 543-3560
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 476 in Washington → Look up another NPI →
Also registered at 1705 NE Pacific St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify John C.h. Byon in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWashington Medical Commission
Search for license MD00045091Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
John C.h. Byon among 476 hematology & oncology physician records in Washington
John C.h. Byon, MD is one of 476 hematology & oncology physician records with a practice address in Washington. 71% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2006, is newer than 8% of them.
- NPI issued2006 · 8% of these records are older, 64% newer
- In a Medicare fileNo · 71% of these records are
- In the CMS Doctors and Clinicians fileNo · 62% of these records are
- Record last updated2009 · 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 207RH0003X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hematology & Oncology Physician providers in Washington
There are 476 hematology & oncology physician records in Washington. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 476 in Washington → Every provider in Seattle → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Carl Blau, MDSeattle, WA 981951881779619
- Cheryl Carlson, MDSeattle, WA 981951669586921
- Aude Chapuis, MDSeattle, WA 981951639366529
- Romeo De Claro, MDSeattle, WA 981951194831404
- Mary FlowersSeattle, WA 981951386729184
- Leona HolmbergSeattle, WA 981951720163538
- Hans-Peter KiemSeattle, WA 981951740370600
- Stephanie LeeSeattle, WA 981951427138494
Common questions
What is John C.h. Byon, MD's NPI number?
John C.h. Byon, MD's National Provider Identifier (NPI) is 1295848018, issued on Aug 16, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John C.h. Byon, MD located?
The NPPES record lists a practice address at 1705 NE Pacific St, Seattle, WA, 98195. Phone: (206) 543-2368. Providers update this record themselves, so call before visiting.
How can I verify John C.h. Byon, MD's license?
NPPES lists Washington license number MD00045091, 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. 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.