William Marvin Gaskill, M.D
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician · Friday Harbor, WA
William Marvin Gaskill, M.D is a thoracic surgery (cardiothoracic vascular surgery) physician with a practice address in Friday Harbor, Washington, and NPI 1851636211, issued on Dec 11, 2012. Check the license (Washington MD00016482, as entered in NPPES) on the Washington Medical Commission; the Medicare figures below come from public CMS files.
- Name
- William Marvin Gaskill
- Credential
- M.D
- Primary taxonomy
- Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician 208G00000X
- License number
- MD00016482 WA
Self-reported in NPPES; status is on the state search - Practice location
- 17 Indian Beach LN, Friday Harbor, WA 98250
- Phone
- (360) 317-6711
- Enumerated
- Dec 11, 2012
- Record last updated
- Dec 11, 2012 (not updated in 14 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest thoracic surgery (cardiothoracic vascular surgery) physician records → All 120 in Washington → Look up another NPI →
Verify William Marvin Gaskill in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWashington Medical Commission
Search for license MD00016482Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
78% fewer Medicare Part D claims than the average thoracic surgery (cardiothoracic vascular surgery) physician in 2024
22 Medicare Part D claims, against an average of 101 among the 2,587 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.
William Marvin Gaskill among 120 thoracic surgery (cardiothoracic vascular surgery) physician records in Washington
William Marvin Gaskill, M.D is one of 120 thoracic surgery (cardiothoracic vascular surgery) physician records with a practice address in Washington. 78% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2012, is newer than 76% of them.
- NPI issued2012 · 76% of these records are older, 22% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileNo · 64% of these records are
- Record last updated2012 · 65% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208G00000X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician providers in Washington
There are 120 thoracic surgery (cardiothoracic vascular surgery) physician records in Washington.
All 120 in Washington → Every provider in Friday Harbor → Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician nationwide →
The 8 thoracic surgery (cardiothoracic vascular surgery) physician records with the nearest ZIP codes
- Richard Leone, MD, PHDMount Vernon, WA 982741821058850
- Mark Awolesi, MDBellingham, WA 982251871605485
- James Douglas, M.D.Bellingham, WA 982251588626071
- Scott Louis, M.D.Bellingham, WA 982251356585137
- Mastaneh Ahmadi-Kashani, MDEverett, WA 982011275768186
- Luis Fernando Alberton, M.D.Everett, WA 982011588051494
- Joseph Austin, M.D.Everett, WA 982011134189699
- Kimberly Costas, MDEverett, WA 982011922044973
Common questions
What is William Marvin Gaskill, M.D's NPI number?
William Marvin Gaskill, M.D's National Provider Identifier (NPI) is 1851636211, issued on Dec 11, 2012. An NPI identifies a provider in billing; it is not a license.
Where is William Marvin Gaskill, M.D located?
The NPPES record lists a practice address at 17 Indian Beach LN, Friday Harbor, WA, 98250. Phone: (360) 317-6711. Providers update this record themselves, so call before visiting.
How can I verify William Marvin Gaskill, M.D's license?
NPPES lists Washington license number MD00016482, 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 William Marvin Gaskill, M.D prescribe under Medicare Part D?
In 2024, William Marvin Gaskill, M.D had 22 Medicare Part D claims; the average among thoracic surgery (cardiothoracic vascular surgery) physician prescribers was 101. 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.