William McKay, DO
Family Medicine Physician · Mount Vernon, MO
William McKay, DO is a family medicine physician with a practice address in Mount Vernon, Missouri, and NPI 1265417331, issued on Dec 13, 2005. Check the license (Missouri R5G53, as entered in NPPES) on the Missouri Board of Registration for the Healing Arts; the Medicare figures below come from public CMS files.
- Name
- William McKay
- Credential
- DO
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- R5G53 MO
Self-reported in NPPES; status is on the state search - Practice location
- 108 S Hickory St, Mount Vernon, MO 65712
- Phone
- (417) 466-4110
- Enumerated
- Dec 13, 2005
- Entity
- Type 1 · individual
Also registered at 108 S Hickory St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Amanda Chapman, MSN-NPFamily Nurse Practitioner1659960979
- Thomas Douglas, NPFamily Nurse Practitioner1851686182
- Teresa Jolley, PA-CMedical Physician Assistant1346341658
- Malinda Kendrick, FNPFamily Nurse Practitioner1578550158
Verify William McKay in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMissouri Board of Registration for the Healing Arts
Search for license R5G53Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
83% more Medicare Part D claims than the average family medicine physician in 2024
6,442 Medicare Part D claims for 286 beneficiaries, against an average of 3,519 among the 111,126 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 729 claims were for opioids.
Most prescribed
- Hydrocodone-Acetaminophen262 claims
- Levothyroxine Sodium258 claims
- Atorvastatin Calcium250 claims
- Lisinopril225 claims
- Omeprazole212 claims
- Gabapentin192 claims
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.
Industry payments in 2024: $163.40
7 payments, mostly food and beverage; the largest payer was Lilly USA, LLC. The 53,013 providers of this specialty with any payment received $861.30 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.
One hospital or facility affiliation
- Sgoh Acquisition IncCarthage, MO
Source: CMS Doctors and Clinicians affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
10 family medicine physician records list a Mount Vernon practice address
They are 10 of the 134 NPPES records with a Mount Vernon practice address, and 2,920 family medicine physician records in Missouri.
All 10 in Mount Vernon → All 2,920 in Missouri → Every provider in Mount Vernon →
Other family medicine physician records in Missouri
- Mohammad Abbas, DOKirksville, MO1518537679
- Karam Abdelmasih, MD, APFestus, MO1093288508
- Afsheen Abdullah Patel, MDLees Summit, MO1598070377
- Christopher Abercrombie, DOArnold, MO1093787558
- Avery Abernathy, D.O.Kansas City, MO1013207836
- Kristia Abernathy, MDSaint Louis, MO1710545405
- Grant Abkemeier, DOColumbia, MO1922933712
- Beatrice Abraham, DOLebanon, MO1861056004
- John Abraham, M.D.Springfield, MO1760595136
- Samer Abu-Amer, M.D.Independence, MO1154880474
Common questions
What is William McKay, DO's NPI number?
William McKay, DO's National Provider Identifier (NPI) is 1265417331, issued on Dec 13, 2005. An NPI identifies a provider in billing; it is not a license.
Where is William McKay, DO located?
The NPPES record lists a practice address at 108 S Hickory St, Mount Vernon, MO, 65712. Phone: (417) 466-4110. Providers update this record themselves, so call before visiting.
How can I verify William McKay, DO's license?
NPPES lists Missouri license number R5G53, as entered by the provider. Search the Missouri Board of Registration for the Healing Arts at https://www.fsmb.org/contact-a-state-medical-board/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does William McKay, DO prescribe under Medicare Part D?
In 2024, William McKay, DO had 6,442 Medicare Part D claims for 286 beneficiaries; the average among family medicine physician prescribers was 3,519. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.