NPI registry status
Active
2026 NPPES data Family Medicine Physician NPI 1326278912 MD
Verify on CMS → Mark Longmuir, MD
Family Medicine Physician in Stanley, North Dakota.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 150,125 in Family Medicine Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
10K
Medicare Part D claims · 315 beneficiaries · Family Medicine Physician avg: 4K
Generic prescribing
89%
generic claims · 10% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
96.6/100
▲ 13 pts above national avg 83.5 · Exceptional
Industry payments
$82.64
4 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Mark Longmuir, MD reported a CMS MIPS final score of 96.6/100 - above the 83.5 national average - and filed 9,502 Medicare Part D claims in 2024.
- 96.6/100
- MIPS score · +13 vs avg
- 10K
- Part D claims, 2024
- 89%
- generic prescribing
- Likely
- board-certified (heuristic)
Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.
Federal trust snapshot
What official records show about Mark Longmuir, MD
Federal records show an active NPI with both Medicare prescribing volume and a measured CMS quality score — objective registry data, not patient reviews.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1326278912), first enumerated 07/17/2009.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 9,502 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
CMS quality reporting (MIPS)
Reported a CMS MIPS final score of 96.6/100 in the Quality Payment Program — a federal quality measure, not a patient review.
Source: CMS Quality Payment Program
- Reported
Board certification signal
Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.
- Reported
Hospital affiliations
1 CMS Care Compare hospital affiliation on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- Reported
Industry payment transparency
$82.64 in reported industry payments (4 transfers) in 2024 under the federal Sunshine Act — disclosed transfers of value, not a quality rating.
Source: CMS Open Payments
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
CMS NPPES provider registry desk
NPI 1326278912 · Family Medicine Physician
NPI-10 · ENUM-MID · TAX-MEGA · MIPS-ELITE · RX-MID · BOOK-LIGHT · PHOTO-FINISH
- NPI-10 1326278912
- ENUM-MID 2009
- TAX-MEGA 150K Family Medicine
- MIPS-ELITE 96.6/100
- RX-MID 9,502
- BOOK-LIGHT 616 in North Dakota
- PHOTO-FINISH Haley Coleman · ±0.0
MIPS final-score neighbourhood
Same-specialty nationwide peers by CMS final score, not geographic proximity
- Longmuir · this …
Longmuir · this provider
96.6 MIPS pts
- Haley Coleman · …
Haley Coleman
96.6 MIPS pts
- Lisa Lesko, MD ·…
Lisa Lesko, MD
96.7 MIPS pts
- Kevin Miller, M.…
Kevin Miller, M.D.
96.7 MIPS pts
- Robert Baroody, …
Robert Baroody, MD
96.7 MIPS pts
What this shows Nearest measured MIPS peers for this NUCC specialty (2023 performance year).
Mark Longmuir, MD's MIPS score vs every measured U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure. Clinicians whose score CMS assigned without scoring any category are excluded.
97 ≥ 82nd percentile 82% of 454,083 measured providers are in lower value bands
Each bar is a band; taller bars hold more measured providers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
The percentile is a conservative whole-score-point band: it counts only measured clinicians in lower score bands. A CMS MIPS metric is not a recommendation or a clinical-quality rating by PlainDoctor. See methodology § corpus placement.
Source CMS Merit-based Incentive Payment System (MIPS) · 2023
Where Mark Longmuir, MD sits
This provider among family medicine physician peers
Across the 21,266 family medicine physician providers who report both Medicare Part D prescribing and a MIPS quality score, Mark Longmuir, MD writes more Part D claims than 87% of them and scores higher on MIPS quality than 86% - placing this provider in the high-volume, high-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Each dot is one family medicine physician peer from a representative sample of 60; the gold marker is Mark Longmuir, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Mark Longmuir, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 1 hospital affiliation - signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Mark Longmuir, MD?
High performer (top quartile)Primary specialty
Family Medicine Physician
Medicare Part D claims
9,502 170% vs specialty avg
MIPS final score
96.6/100 13.1 pts vs avg
Specialty distribution in North Dakota
How Family Medicine Physician compares to other specialties among North Dakota providers
Medicare quality performance, MIPS
Mark Longmuir, MD's 2023 MIPS final score plotted against the Family Medicine Physician national average
- MIPS Final Score
- 96.6/100
- vs 83.5 national avg · 2023 performance year
How MIPS and board certification work
The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.
Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).
Practice Address
Provider Details
| NPI | 1326278912 |
|---|---|
| Specialty | Family Medicine Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 07/17/2009 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
96.6327
Final Score
Measured-score avg: 83.5
88.7756
Quality
100
Cost
100
Promoting Interoperability
Reporting: Group practice
Hospital and facility affiliations
Facilities where Mark Longmuir, MD bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" - a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.
Mountrail County Medical Center Inc
Stanley, ND
Critical Access Hospitals
CMS CCN: 351301
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Industry payments received (2024) - CMS Open Payments transparency data
The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for Mark Longmuir, MD. Source: openpaymentsdata.cms.gov.
Total received
$83
Largest payer
Kerecis Limited
Most common payment type
Food and Beverage
Industry payments are not necessarily indicators of bias, they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.
Brand vs generic prescribing mix · Typical
Mark Longmuir, MD - brand share 10.0%
Family Medicine Physician average
10% brand-name claims vs 89% generic, on 9,502 2024 Medicare Part D claims.
The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2024.
9,502
Total Claims
$512K
Total Drug Cost
315
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 12,693.867
- Total Day Supply
- 298,172
- Brand vs Generic
- 10% brand / 89% generic
- Brand Drug Cost
- $391K
- Generic Drug Cost
- $104K
- Opioid Claims
- 301 (3.2% rate)
- Antibiotic Claims
- 216
Patient Demographics
- Average Patient Age
- 74.5 years
- Avg HCC Risk Score
- 1.10
- Gender Split
- 46% female / 54% male
- Age Distribution
- <65: 25, 65-74: 142, 75-84: 97, 85+: 51
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Mark Longmuir, MD prescribes most
Top Medicare Part D drugs by claim count, 2024
- Furosemide
Furosemide
398 claims
- Levothyroxine Sodium
Levothyroxine Sodium
322 claims
- Atorvastatin Calcium
Atorvastatin Calcium
318 claims
- Pantoprazole Sodium
Pantoprazole Sodium
277 claims
- Sertraline Hcl
Sertraline Hcl
244 claims
- Hydrochlorothiazide
Hydrochlorothiazide
241 claims
- Lisinopril
Lisinopril
240 claims
- Potassium Chloride
Potassium Chloride
234 claims
| Drug | Claims |
|---|---|
| Furosemide | 398 |
| Levothyroxine Sodium | 322 |
| Atorvastatin Calcium | 318 |
| Pantoprazole Sodium | 277 |
| Sertraline Hcl | 244 |
| Hydrochlorothiazide | 241 |
| Lisinopril | 240 |
| Potassium Chloride | 234 |
| Metoprolol Succinate | 232 |
| Lorazepam | 231 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Family Medicine Physician Overview
How Mark Longmuir, MD fits within the Family Medicine Physician landscape nationally.
150,125
Family Medicine Physician Providers in US
56
States with Family Medicine Physician
3,519
Avg Claims per Provider
Mark Longmuir, MD's 9,502 claims are above the specialty average of 3,519.
Nationwide Family Medicine Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Longmuir, both outside North Dakota so the neighborhoods are not geographic containment.
Similar MIPS final score
Nearest same-specialty clinicians by CMS MIPS final score (96.6 here).
Same NPPES enumeration year (2009)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Family Medicine Physician Providers in North Dakota
Other clinicians with the same primary specialty enrolled in North Dakota, drawn from the same CMS NPPES roster as Longmuir.
One of 616 Family Medicine Physician providers enrolled in North Dakota, 5 are shown here.
Dr. Winter Ackerman
MD
Wahpeton, ND
Dr. Tim Adams
MD
Bowman, ND
Dr. Joseph Adamson
MD
Grand Forks Afb, ND
Dr. Boyd Addy
MD
Mandan, ND
Dr. Abhinn Aggarwal
MD
Minot, ND
Compare Family Medicine Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Mark Longmuir, MD's specialty? ▼
Mark Longmuir, MD specializes in Family Medicine Physician and practices in Stanley, North Dakota. Credentials: MD.
How much does Mark Longmuir, MD prescribe under Medicare Part D? ▼
In 2024, Mark Longmuir, MD wrote 9,502 Medicare Part D claims totaling $512K in drug costs for 315 beneficiaries.
What is Mark Longmuir, MD's Medicare quality score? ▼
Mark Longmuir, MD has a CMS MIPS Final Score of 96.6/100 (Quality: 88.8, Cost: 100). The average MIPS Final Score across the 454,083 clinicians with at least one published category score is 83.5; clinicians whose score CMS assigned without scoring any category are excluded from that average. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Mark Longmuir, MD located? ▼
Mark Longmuir, MD is located at 615 6TH ST SE, Stanley, ND, 58784. Phone: (701) 628-2424.
What is Mark Longmuir, MD's NPI number? ▼
Mark Longmuir, MD's National Provider Identifier (NPI) is 1326278912, issued on 07/17/2009.
Does Mark Longmuir, MD prescribe more brand-name or generic drugs? ▼
Mark Longmuir, MD's prescribing is 10% brand-name and 89% generic drugs by claim count, with $391K in brand drug costs.
Does Mark Longmuir, MD prescribe opioids? ▼
Yes, Mark Longmuir, MD had 301 opioid claims in 2024 with an opioid prescribing rate of 3.2%.
How many Family Medicine Physician providers are there in the US? ▼
There are 150,125 Family Medicine Physician providers across 56 states in the US. The average Family Medicine Physician provider writes 3,519 Medicare Part D claims per year.
What drugs does Mark Longmuir, MD prescribe most often? ▼
Based on 2024 Medicare Part D data, Mark Longmuir, MD's most frequently prescribed drugs include Furosemide, Levothyroxine Sodium, Atorvastatin Calcium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Mark Longmuir, MD accept Medicare? ▼
Mark Longmuir, MD appears in CMS Medicare data with 9,502 Part D claims and 315 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Mark Longmuir, MD's credentials? ▼
Mark Longmuir, MD's NPI is 1326278912 with credentials MD. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.
Data Sources
View source datasets and methodology notes
- Provider Directory
- CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
- Specialty Classification
- NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
- Prescribing Data
- CMS Medicare Part D Prescriber Public Use File (2024). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
- Quality Performance
- CMS Merit-based Incentive Payment System (MIPS) - 2023 performance year.
- Limitations
- Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.
See our complete data methodology for details on how we collect and process government data.
Data as of August 2026 (NPPES) / 2024 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).
Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of August 2026.