Mark Farley
Internal Medicine Physician · Toppenish, WA
Mark Farley is an internal medicine physician with a practice address in Toppenish, Washington, and NPI 1164518353, issued on Oct 5, 2006. Check the license (Washington MD00026408, as entered in NPPES) on the Washington Medical Commission; the Medicare figures below come from public CMS files.
- Name
- Mark Farley
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- MD00026408 WA
Self-reported in NPPES; status is on the state search - Practice location
- 510 W 1St Ave, Toppenish, WA 98948
- Phone
- (509) 865-5600
- Enumerated
- Oct 5, 2006
- Record last updated
- Mar 17, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (509) 865-5783
- Medicaid ID
- 8130510 WA
- Medicare enrollment
- Enrolled (PECOS I20100208000568); accepts Medicare assignment
- Medical or professional school
- Oregon Health Sciences University School Of Medicine, 1985
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 3,079 in Washington → Look up another NPI →
Also registered at 510 W 1St Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Aaron Anderson, D.O.Internal Medicine Physician1003057381
- Stephanie Baluca, PHARMDPharmacist1942852678
- Marilyn BerkoPediatrics Physician1164454526
- Mandeep Brar, M.D.Pediatrics Physician1548886583
- Alicia BritoCase Manager/Care Coordinator1861027104
- Sean Brown, PHARM.DPharmacist1982977492
Verify Mark Farley in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWashington Medical Commission
Search for license MD00026408Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
63% fewer Medicare Part D claims than the average internal medicine physician in 2024
1,179 Medicare Part D claims for 235 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 55 claims were for opioids.
Most prescribed
- Atorvastatin Calcium78 claims
- Gabapentin50 claims
- Albuterol Sulfate Hfa39 claims
- Losartan Potassium36 claims
- Metoprolol Succinate34 claims
- Omeprazole34 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: $17.02
1 payment: food and beverage; the largest payer was Astellas Pharma US Inc. The 50,334 providers of this specialty with any payment received $1,303.06 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
- One Community HealthThe Dalles, OR
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark Farley among 3,079 internal medicine physician records in Washington
Mark Farley is one of 3,079 internal medicine physician records with a practice address in Washington. 75% 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 8% of them.
- NPI issued2006 · 8% of these records are older, 55% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated1985 · median 2006 among the 1,852 with a school on file
- Record last updated2021 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
10 internal medicine physician records list a practice address in Toppenish
They are 10 of the 349 NPPES records with a practice address in Toppenish, and 3,079 internal medicine physician records in Washington.
All 3,079 in Washington → Every provider in Toppenish → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Aaron Anderson, D.O.Toppenish, WA 989481003057381
- Vlastimil CalayanToppenish, WA 989481073757118
- Kathleen Davis, M.D.Toppenish, WA 989481205042108
- Stephanie HansenToppenish, WA 989481649229931
- Vesna Jamborcic, MDToppenish, WA 989481407827850
- Petar Jamborcic, MDToppenish, WA 989481114990538
- John Moran, MDToppenish, WA 989481730199225
- Reuben Ramoz, M.D., M.B.A.Toppenish, WA 989481851564504
Common questions
What is Mark Farley's NPI number?
Mark Farley's National Provider Identifier (NPI) is 1164518353, issued on Oct 5, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark Farley located?
The NPPES record lists a practice address at 510 W 1St Ave, Toppenish, WA, 98948. Phone: (509) 865-5600. Providers update this record themselves, so call before visiting.
How can I verify Mark Farley's license?
NPPES lists Washington license number MD00026408, 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 Mark Farley prescribe under Medicare Part D?
In 2024, Mark Farley had 1,179 Medicare Part D claims for 235 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.