Mark Kenneth Longmuir, MD
Family Medicine Physician · Stanley, ND
Mark Kenneth Longmuir, MD is a family medicine physician with a practice address in Stanley, North Dakota, and NPI 1326278912, issued on Jul 17, 2009. Check the license (North Dakota 12233, as entered in NPPES) on the North Dakota Board of Medicine; the Medicare figures below come from public CMS files.
- Name
- Mark Kenneth Longmuir
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 12233 ND
Self-reported in NPPES; status is on the state search - Practice location
- 615 6TH St SE, Stanley, ND 58784
- Phone
- (701) 628-2424
- Enumerated
- Jul 17, 2009
- Record last updated
- Jun 4, 2024
- Fax
- (701) 628-3274
- Medicare enrollment
- Enrolled (PECOS I20121025000809); accepts Medicare assignment
- Medical or professional school
- University Of North Dakota School Of Medicine, 2012
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 596 in North Dakota → Look up another NPI →
Also registered at 615 6TH St SE
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Mark Kenneth Longmuir in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNorth Dakota Board of Medicine
Search for license 12233Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.7 times the Medicare Part D claims of the average family medicine physician in 2024
9,502 Medicare Part D claims for 315 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 301 claims were for opioids.
Most prescribed
- Furosemide398 claims
- Levothyroxine Sodium322 claims
- Atorvastatin Calcium318 claims
- Pantoprazole Sodium277 claims
- Sertraline Hcl244 claims
- Hydrochlorothiazide241 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 practice group's MIPS final score for 2023 (Medicare payment program): 96.6 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. 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, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $82.64
4 payments; by number, the most common kind was food and beverage; the largest payer was Kerecis Limited. 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.
One hospital affiliation
- Mountrail County Medical Center IncStanley, ND · Critical Access Hospitals
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov).
Mark Kenneth Longmuir among 596 family medicine physician records in North Dakota
Mark Kenneth Longmuir, MD is one of 596 family medicine physician records with a practice address in North Dakota. 66% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2009, is newer than 53% of them.
- NPI issued2009 · 53% of these records are older, 45% newer
- In a Medicare fileYes · 66% of these records are
- In the CMS Doctors and Clinicians fileYes · 51% of these records are
- Graduated2012 · median 2007 among the 305 with a school on file
- Record last updated2024 · 54% 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 North Dakota practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
1 family medicine physician record lists a practice address in Stanley
They are 1 of the 49 NPPES records with a practice address in Stanley, and 596 family medicine physician records in North Dakota.
All 596 in North Dakota → Every provider in Stanley → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Brittany Bertsch, DOWilliston, ND 588011457872863
- William Brunsman, MDWilliston, ND 588011104914530
- William Code, MDWilliston, ND 588011265520605
- Robert Kemp, M.D.Williston, ND 588011114951431
- James Kennedy, MDWilliston, ND 588011225102304
- Lynn Nyquist, MDWilliston, ND 588011457315970
- Mark Olson, MDWilliston, ND 588011023182110
- Ryan Siewert, MDWilliston, ND 588011528355500
Common questions
What is Mark Kenneth Longmuir, MD's NPI number?
Mark Kenneth Longmuir, MD's National Provider Identifier (NPI) is 1326278912, issued on Jul 17, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Mark Kenneth Longmuir, MD located?
The NPPES record lists a practice address at 615 6TH St SE, Stanley, ND, 58784. Phone: (701) 628-2424. Providers update this record themselves, so call before visiting.
How can I verify Mark Kenneth Longmuir, MD's license?
NPPES lists North Dakota license number 12233, as entered by the provider. Search the North Dakota Board of Medicine at https://www.ndbom.org/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mark Kenneth Longmuir, MD prescribe under Medicare Part D?
In 2024, Mark Kenneth Longmuir, MD had 9,502 Medicare Part D claims for 315 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
What is Mark Kenneth Longmuir, MD's MIPS final score?
The 2023 MIPS final score is 96.6 of 100, reported for the practice group. 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.