William Lewis McKay, DO
Family Medicine Physician · Mount Vernon, MO
William Lewis 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 Lewis 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
- Record last updated
- Aug 19, 2022
- Fax
- (417) 466-4255
- Medicaid IDs
- 242356210 MO
1265417331 MO - Medicare enrollment
- Enrolled (PECOS I20081205000103); accepts Medicare assignment
- Medical or professional school
- Oklahoma State University College Of Osteopathic Medicine, 1983
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 2,991 in Missouri → Look up another NPI →
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-CPhysician Assistant1346341658
- Malinda Kendrick, FNPFamily Nurse Practitioner1578550158
Verify William Lewis 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
82% 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 3,544 among the 117,163 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; by number, the most common kind was food and beverage; the largest payer was Lilly USA, LLC. The 55,478 providers of this specialty with any payment received $902.55 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.
Bills Medicare through one group practice
- Sgoh Acquisition IncCarthage, MO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William Lewis McKay among 2,991 family medicine physician records in Missouri
William Lewis McKay, DO is one of 2,991 family medicine physician records with a practice address in Missouri. 79% 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, 87% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated1983 · median 2006 among the 1,778 with a school on file
- Record last updated2022 · 53% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Missouri practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
11 family medicine physician records list a practice address in Mount Vernon
They are 11 of the 134 NPPES records with a practice address in Mount Vernon, and 2,991 family medicine physician records in Missouri.
All 2,991 in Missouri → Every provider in Mount Vernon → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Elizabeth Dean, D.O.Mount Vernon, MO 657121720094667
- Lawrence Dybedock, M.D.Mount Vernon, MO 657121952411860
- Ernest Emmerton, D.O.Mount Vernon, MO 657121407860786
- Mauricio Gomez, M.D.Mount Vernon, MO 657121316201312
- Beryl Kime, M.D.Mount Vernon, MO 657121528076122
- Kendel KleinMount Vernon, MO 657121245233741
- Linda Myers, MDMount Vernon, MO 657121063423168
- Lisa Parker, MDMount Vernon, MO 657121578682324
Common questions
What is William Lewis McKay, DO's NPI number?
William Lewis 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 Lewis 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 Lewis 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 Lewis McKay, DO prescribe under Medicare Part D?
In 2024, William Lewis McKay, DO had 6,442 Medicare Part D claims for 286 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.