John Floyd Merrill, D.O.
Family Medicine Physician · Clarkston, WA
John Floyd Merrill, D.O. is a family medicine physician with a practice address in Clarkston, Washington, and NPI 1992152326, issued on May 16, 2016. Check the license on the Washington Medical Commission; the Medicare figures below come from public CMS files.
- Name
- John Floyd Merrill
- Credential
- D.O.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 20A16056 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1119 Highland Ave, Clarkston, WA 99403
- Phone
- (509) 758-1450
- Enumerated
- May 16, 2016
- Record last updated
- Jul 21, 2022
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 5,534 in Washington → Look up another NPI →
Also registered at 1119 Highland Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify John Floyd Merrill in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWashington Medical CommissionCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.0 times the Medicare Part D claims of the average family medicine physician in 2024
10,771 Medicare Part D claims for 697 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 8% of claims. 449 claims were for opioids.
Most prescribed
- Losartan Potassium694 claims
- Amlodipine Besylate532 claims
- Atorvastatin Calcium461 claims
- Levothyroxine Sodium460 claims
- Omeprazole417 claims
- Rosuvastatin Calcium412 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: $226.71
11 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. 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.
John Floyd Merrill among 5,534 family medicine physician records in Washington
John Floyd Merrill, D.O. is one of 5,534 family medicine physician records with a practice address in Washington. 73% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2016, is newer than 76% of them.
- NPI issued2016 · 76% of these records are older, 21% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileNo · 60% of these records are
- Record last updated2022 · 57% 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 Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
9 family medicine physician records list a practice address in Clarkston
They are 9 of the 408 NPPES records with a practice address in Clarkston, and 5,534 family medicine physician records in Washington.
All 5,534 in Washington → Every provider in Clarkston → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Elizabeth Black, MDClarkston, WA 994031578556833
- Warren Ellison, M.D.Clarkston, WA 994031982718235
- Allen Ernster, M.D.Clarkston, WA 994031730276593
- Jayme Mackay, M.D.Clarkston, WA 994031902804594
- Jagjit Mangat, MDClarkston, WA 994031679516918
- David Martin, M.D.Clarkston, WA 994031083652846
- Carson Seeber, M.D.Clarkston, WA 994031861740300
- Joel Woodruff, MDClarkston, WA 994031912420332
Common questions
What is John Floyd Merrill, D.O.'s NPI number?
John Floyd Merrill, D.O.'s National Provider Identifier (NPI) is 1992152326, issued on May 16, 2016. An NPI identifies a provider in billing; it is not a license.
Where is John Floyd Merrill, D.O. located?
The NPPES record lists a practice address at 1119 Highland Ave, Clarkston, WA, 99403. Phone: (509) 758-1450. Providers update this record themselves, so call before visiting.
How can I verify John Floyd Merrill, D.O.'s license?
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 John Floyd Merrill, D.O. prescribe under Medicare Part D?
In 2024, John Floyd Merrill, D.O. had 10,771 Medicare Part D claims for 697 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.