Mark Walter Frohlich
Medical Oncology Physician · Seattle, WA
Mark Walter Frohlich is a medical oncology physician with a practice address in Seattle, Washington, and NPI 1366528168, issued on Oct 27, 2006. Check the license (Washington MD00040829, as entered in NPPES) on the Washington Medical Commission; the Medicare figures below come from public CMS files.
- Name
- Mark Walter Frohlich
- Primary taxonomy
- Medical Oncology Physician 207RX0202X
- License number
- MD00040829 WA
Self-reported in NPPES; status is on the state search - Practice location
- Harborview Medical Center, Seattle, WA 98104
- Phone
- (206) 744-3241
- Enumerated
- Oct 27, 2006
- Record last updated
- Dec 28, 2012 (not updated in 14 years: call before relying on the address or phone)
- Medicaid ID
- 1366528168 WA
- Entity
- Type 1 · individual
8 nearest medical oncology physician records → All 183 in Washington → Look up another NPI →
Also registered at Harborview Medical Center
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Mark Walter Frohlich in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWashington Medical Commission
Search for license MD00040829Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Industry payments in 2024: $20.70
1 payment: food and beverage; the largest payer was Siemens Medical Solutions USA, Inc. The 3,343 providers of this specialty with any payment received $11,773.47 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Mark Walter Frohlich among 183 medical oncology physician records in Washington
Mark Walter Frohlich is one of 183 medical oncology physician records with a practice address in Washington. 72% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 12% of them.
- NPI issued2006 · 12% of these records are older, 40% newer
- In a Medicare fileYes · 72% of these records are
- In the CMS Doctors and Clinicians fileNo · 61% of these records are
- Record last updated2012 · 70% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RX0202X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Medical Oncology Physician providers in Washington
There are 183 medical oncology physician records in Washington.
All 183 in Washington → Every provider in Seattle → Medical Oncology Physician nationwide →
The 8 medical oncology physician records with the nearest ZIP codes
- Thomas Brown, M.D.Seattle, WA 981041992880991
- Siddhartha Devarakonda, MDSeattle, WA 981041487932398
- Albert Einstein, MDSeattle, WA 981041558444588
- Erin Ellis, MDSeattle, WA 981041447334164
- Rafic Farah, MDSeattle, WA 981041780760587
- Mehmet Fer, MDSeattle, WA 981041164506887
- Philip Gold, MDSeattle, WA 981041265516983
- William Gwin, MDSeattle, WA 981041598875882
Common questions
What is Mark Walter Frohlich's NPI number?
Mark Walter Frohlich's National Provider Identifier (NPI) is 1366528168, issued on Oct 27, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark Walter Frohlich located?
The NPPES record lists a practice address at Harborview Medical Center, Seattle, WA, 98104. Phone: (206) 744-3241. Providers update this record themselves, so call before visiting.
How can I verify Mark Walter Frohlich's license?
NPPES lists Washington license number MD00040829, 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.