Mark David Derleth, M.D.
Gastroenterology Physician · Seattle, WA
Mark David Derleth, M.D. is a gastroenterology physician with a practice address in Seattle, Washington, and NPI 1356457063, issued on Aug 23, 2006. Check the license (Washington MD 60022504, as entered in NPPES) on the Washington Medical Commission; the Medicare figures below come from public CMS files.
- Name
- Mark David Derleth
- Credential
- M.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- MD 60022504 WA
Self-reported in NPPES; status is on the state search - Practice location
- 1959 NE Pacific St, Seattle, WA 98195
- Phone
- (206) 598-4377
- Enumerated
- Aug 23, 2006
- Record last updated
- Mar 18, 2014 (not updated in 12 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20131001000258); accepts Medicare assignment
- Medical or professional school
- Boston University School Of Medicine, 2006
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 533 in Washington → Look up another NPI →
Also registered at 1959 NE Pacific St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Mark David Derleth in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWashington Medical Commission
Search for license MD 60022504Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
54% fewer Medicare Part D claims than the average gastroenterology physician in 2024
375 Medicare Part D claims for 126 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 38% of claims.
Most prescribed
- Omeprazole67 claims
- Famotidine34 claims
- Linzess31 claims
- Gavilyte-G29 claims
- Movantik24 claims
- Peg-3350 And Electrolytes21 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.
The MIPS final score for 2023 (Medicare payment program): 93.1 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- The Association OF University PhysiciansSeattle, WA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark David Derleth among 533 gastroenterology physician records in Washington
Mark David Derleth, M.D. is one of 533 gastroenterology physician records with a practice address in Washington. 76% 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 13% of them.
- NPI issued2006 · 13% of these records are older, 48% newer
- In a Medicare fileYes · 76% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated2006 · median 2003 among the 373 with a school on file
- Record last updated2014 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in Washington
There are 533 gastroenterology physician records in Washington.
All 533 in Washington → Every provider in Seattle → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Renuka Bhattacharya, MDSeattle, WA 981951932197902
- Teresa BrentnallSeattle, WA 981951104916063
- Elizabeth Broussard, M.D.Seattle, WA 981951669419495
- Rotonya Carr, MDSeattle, WA 981951154309540
- Margaret Eugenio, MDSeattle, WA 981951477661916
- William Grady, M.D.Seattle, WA 981951407943822
- John Inadomi, MDSeattle, WA 981951992808497
- Andrew Kaz, MDSeattle, WA 981951386746386
Common questions
What is Mark David Derleth, M.D.'s NPI number?
Mark David Derleth, M.D.'s National Provider Identifier (NPI) is 1356457063, issued on Aug 23, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark David Derleth, M.D. located?
The NPPES record lists a practice address at 1959 NE Pacific St, Seattle, WA, 98195. Phone: (206) 598-4377. Providers update this record themselves, so call before visiting.
How can I verify Mark David Derleth, M.D.'s license?
NPPES lists Washington license number MD 60022504, 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 David Derleth, M.D. prescribe under Medicare Part D?
In 2024, Mark David Derleth, M.D. had 375 Medicare Part D claims for 126 beneficiaries; the average among gastroenterology physician prescribers was 811. Part D covers Medicare prescriptions only.
What is Mark David Derleth, M.D.'s MIPS final score?
The 2023 MIPS final score is 93.1 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.