Thomas Lancaster Merlin, MD
Emergency Medicine Physician · Clackamas, OR
Thomas Lancaster Merlin, MD is an emergency medicine physician with a practice address in Clackamas, Oregon, and NPI 1215678040, issued on Apr 5, 2022. Check the license (Oregon MD224072, as entered in NPPES) on the Oregon Medical Board; the Medicare figures below come from public CMS files.
- Name
- Thomas Lancaster Merlin
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License numbers
- MD224072 OR
U7472 TX
Self-reported in NPPES; status is on the state search - Practice location
- 10180 SE Sunnyside RD, Clackamas, OR 97015
- Phone
- (503) 803-2000
- Enumerated
- Apr 5, 2022
- Record last updated
- Jul 4, 2025
- Medicare enrollment
- Enrolled (PECOS I20250711003217); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 1,079 in Oregon → Look up another NPI →
Also registered at 10180 SE Sunnyside RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Jeremy Adler, M.D.Anatomic Pathology & Clinical Pathology Physician1548617483
- Alejandro Aguilar, PA-CPhysician Assistant1740940006
- Usman Ahmad, D.O.Internal Medicine Physician1326288697
- Hyun Jung AhnPhysical Therapist1245014703
Verify Thomas Lancaster Merlin in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersOregon Medical Board
Search for license MD224072Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
35% fewer Medicare Part D claims than the average emergency medicine physician in 2024
146 Medicare Part D claims for 82 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D.
Most prescribed
- Methocarbamol25 claims
- Ibuprofen21 claims
- Doxycycline Hyclate16 claims
- Amoxicillin-Clavulanate Potass11 claims
- Prednisone11 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.
Bills Medicare through one group practice
- Kaiser Foundation Health Plan OF The NorthwestClackamas, OR
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Thomas Lancaster Merlin among 1,079 emergency medicine physician records in Oregon
Thomas Lancaster Merlin, MD is one of 1,079 emergency medicine physician records with a practice address in Oregon. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2022, is newer than 97% of them.
- NPI issued2022 · 97% of these records are older, 1% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 52% of these records are
- Graduated2022 · median 2013 among the 557 with a school on file
- Record last updated2025 · 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 207P00000X and a Oregon practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
94 emergency medicine physician records list a practice address in Clackamas
They are 94 of the 2,098 NPPES records with a practice address in Clackamas, and 1,079 emergency medicine physician records in Oregon.
All 1,079 in Oregon → Every provider in Clackamas → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Scott Bailey, M.D.Clackamas, OR 970151831159490
- Laurel Berge, M.D.Clackamas, OR 970151811944853
- Frederic Cirillo, MDClackamas, OR 970151417923665
- Josephine Colbach, M.D.Clackamas, OR 970151720091101
- Joseph Ehlers, MDClackamas, OR 970151629033329
- Briar Ertz-Berger, MDClackamas, OR 970151508866203
- Jennifer Larson, M.D.Happy Valley, OR 970151679512347
- Nicholas Leonard, M.D.Clackamas, OR 970151003929787
Common questions
What is Thomas Lancaster Merlin, MD's NPI number?
Thomas Lancaster Merlin, MD's National Provider Identifier (NPI) is 1215678040, issued on Apr 5, 2022. An NPI identifies a provider in billing; it is not a license.
Where is Thomas Lancaster Merlin, MD located?
The NPPES record lists a practice address at 10180 SE Sunnyside RD, Clackamas, OR, 97015. Phone: (503) 803-2000. Providers update this record themselves, so call before visiting.
How can I verify Thomas Lancaster Merlin, MD's license?
NPPES lists Oregon license number MD224072, as entered by the provider. Search the Oregon Medical Board at https://www.oregon.gov/OMB/Pages/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Thomas Lancaster Merlin, MD prescribe under Medicare Part D?
In 2024, Thomas Lancaster Merlin, MD had 146 Medicare Part D claims for 82 beneficiaries; the average among emergency medicine physician prescribers was 226. 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.