Grant Marquart, MD
Family Medicine Physician · Portland, OR
Grant Marquart, MD is a family medicine physician with a practice address in Portland, Oregon, and NPI 1730728361, issued on Dec 30, 2019. Check the license (Oregon MD224178, as entered in NPPES) on the Oregon Medical Board; the Medicare figures below come from public CMS files.
- Name
- Grant Marquart
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- MD224178 OR
Self-reported in NPPES; status is on the state search - Practice location
- 19500 SE Stark St, Portland, OR 97233
- Phone
- (800) 813-2000
- Enumerated
- Dec 30, 2019
- Record last updated
- Aug 29, 2025
- Medicare enrollment
- Enrolled (PECOS I20250925003364); accepts Medicare assignment
- Medical or professional school
- Oregon Health Sciences University School Of Medicine, 2021
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 2,847 in Oregon → Look up another NPI →
Also registered at 19500 SE Stark St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Nicolle AsencioFamily Nurse Practitioner1225753692
- Richard Babal, MANAGEROptician1295824282
- Thomas Beaver, M.D.Internal Medicine Physician1215019112
- Jennifer Bishop, MDInternal Medicine Physician1548284557
Verify Grant Marquart in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersOregon Medical Board
Search for license MD224178Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
70% fewer Medicare Part D claims than the average family medicine physician in 2024
1,057 Medicare Part D claims for 91 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. 42 claims were for opioids.
Most prescribed
- Amlodipine Besylate61 claims
- Atorvastatin Calcium61 claims
- Lisinopril58 claims
- Gabapentin42 claims
- Losartan Potassium42 claims
- Levothyroxine Sodium35 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 NorthwestVancouver, WA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Grant Marquart among 2,847 family medicine physician records in Oregon
Grant Marquart, MD is one of 2,847 family medicine physician records with a practice address in Oregon. 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 2019, is newer than 86% of them.
- NPI issued2019 · 86% of these records are older, 11% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2021 · median 2009 among the 1,671 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 207Q00000X and a Oregon practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
561 family medicine physician records list a practice address in Portland
They are 561 of the 42,088 NPPES records with a practice address in Portland, and 2,847 family medicine physician records in Oregon.
All 2,847 in Oregon → Every provider in Portland → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Susanne Bobenrieth, M.D.Portland, OR 972331871577742
- Anong Burke, MDPortland, OR 972331932205556
- Daniel Copp, MDPortland, OR 972331093903700
- Audrey Crist, MDPortland, OR 972331790888907
- Peter Hatcher, MDPortland, OR 972331356492979
- Margaret Hayes, MDPortland, OR 972331437164951
- Lorissa Klaus, M.D.Portland, OR 972331831296979
- John Loomis, MDPortland, OR 972331487618781
Common questions
What is Grant Marquart, MD's NPI number?
Grant Marquart, MD's National Provider Identifier (NPI) is 1730728361, issued on Dec 30, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Grant Marquart, MD located?
The NPPES record lists a practice address at 19500 SE Stark St, Portland, OR, 97233. Phone: (800) 813-2000. Providers update this record themselves, so call before visiting.
How can I verify Grant Marquart, MD's license?
NPPES lists Oregon license number MD224178, 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 Grant Marquart, MD prescribe under Medicare Part D?
In 2024, Grant Marquart, MD had 1,057 Medicare Part D claims for 91 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.