Mark S. Ibsen, MD
Emergency Medical Services (Emergency Medicine) Physician · Helena, MT
Mark S. Ibsen, MD is an emergency medical services (emergency medicine) physician with a practice address in Helena, Montana, and NPI 1255378824, issued on Jun 1, 2006. Check the license (Montana 7378, as entered in NPPES) on the Montana Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Mark S. Ibsen
- Credential
- MD
- Primary taxonomy
- Emergency Medical Services (Emergency Medicine) Physician 207PE0004X
- License number
- 7378 MT
Self-reported in NPPES; status is on the state search - Practice location
- 39 Neill Ave, Helena, MT 59601
- Phone
- (406) 513-1052
- Enumerated
- Jun 1, 2006
- Record last updated
- Oct 3, 2012 (not updated in 14 years: call before relying on the address or phone)
- Medicaid ID
- 104958 MT
- Entity
- Type 1 · individual
8 nearest emergency medical services (emergency medicine) physician records → All 14 in Montana → Look up another NPI →
Also registered at 39 Neill Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jeannie Fahlquist, NP-CFamily Nurse Practitioner1508029505
Verify Mark S. Ibsen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMontana Board of Medical Examiners
Search for license 7378Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
64% more Medicare Part D claims than the average emergency medical services (emergency medicine) physician in 2024
479 Medicare Part D claims for 32 beneficiaries, against an average of 292 among the 1,653 providers of this specialty who prescribed in Part D. Brand-name drugs were 4% of claims. 258 claims were for opioids.
Most prescribed
- Oxycodone Hcl174 claims
- Fentanyl42 claims
- Diazepam31 claims
- Clonidine Hcl25 claims
- Promethazine Hcl23 claims
- Insulin Syringe19 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.
Mark S. Ibsen among 14 emergency medical services (emergency medicine) physician records in Montana
Mark S. Ibsen, MD is one of 14 emergency medical services (emergency medicine) physician records with a practice address in Montana. 29% 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 7% of them.
- NPI issued2006 · 7% of these records are older, 14% newer
- In a Medicare fileYes · 29% of these records are
- In the CMS Doctors and Clinicians fileNo · 7% of these records are
- Record last updated2012 · 79% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207PE0004X and a Montana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Emergency Medical Services (Emergency Medicine) Physician providers in Montana
There are 14 emergency medical services (emergency medicine) physician records in Montana.
All 14 in Montana → Every provider in Helena → Emergency Medical Services (Emergency Medicine) Physician nationwide →
The 8 emergency medical services (emergency medicine) physician records with the nearest ZIP codes
- William Gallea, MDHelena, MT 596011497702716
- Andrew Michel, MDHelena, MT 596011164469730
- Mark Rabold, MDHelena, MT 596011235176801
- David Silk, MDHelena, MT 596011144267717
- Michael Sirr, MDHelena, MT 596011053358622
- Margaret Hall, D.O.Butte, MT 597011215990544
- David Kidder, DOAnaconda, MT 597111346293149
- Leslie Cohen, MDBozeman, MT 597151225077464
Common questions
What is Mark S. Ibsen, MD's NPI number?
Mark S. Ibsen, MD's National Provider Identifier (NPI) is 1255378824, issued on Jun 1, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark S. Ibsen, MD located?
The NPPES record lists a practice address at 39 Neill Ave, Helena, MT, 59601. Phone: (406) 513-1052. Providers update this record themselves, so call before visiting.
How can I verify Mark S. Ibsen, MD's license?
NPPES lists Montana license number 7378, as entered by the provider. Search the Montana Board of Medical Examiners at https://ebiz.mt.gov/POL/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mark S. Ibsen, MD prescribe under Medicare Part D?
In 2024, Mark S. Ibsen, MD had 479 Medicare Part D claims for 32 beneficiaries; the average among emergency medical services (emergency medicine) physician prescribers was 292. 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.