Mark W. Zilkoski, MD
Family Medicine Physician · Wolf Point, MT
Mark W. Zilkoski, MD is a family medicine physician with a practice address in Wolf Point, Montana, and NPI 1801909080, issued on Aug 15, 2006. Check the license (Montana 4533, as entered in NPPES) on the Montana Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Mark W. Zilkoski
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 4533 MT
Self-reported in NPPES; status is on the state search - Practice location
- 301 Knapp St, Wolf Point, MT 59201
- Phone
- (406) 653-2150
- Enumerated
- Aug 15, 2006
- Record last updated
- Feb 11, 2008 (not updated in 18 years: call before relying on the address or phone)
- Fax
- (406) 653-6591
- Medicaid ID
- 0096265 MT
- Medicare enrollment
- Enrolled (PECOS I20100723000424); accepts Medicare assignment
- Medical or professional school
- State University Of Ny Upstate Medical University, 1977
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 775 in Montana → Look up another NPI →
Also registered at 301 Knapp St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Barbara Antonson, ARNPNurse Practitioner1609861582
- Kelsey Haugo, FNP-CFamily Nurse Practitioner1891311684
- Jennifer Hoversland, APRN-FNPFamily Nurse Practitioner1194996413
- Danette McIntyre, FNPNurse Practitioner1528171980
- Rebecca Stacey, PAPhysician Assistant1215406897
- Allison Taranto, CNM, FNPAdvanced Practice Midwife1699171009
Verify Mark W. Zilkoski in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMontana Board of Medical Examiners
Search for license 4533Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
30% fewer Medicare Part D claims than the average family medicine physician in 2024
2,481 Medicare Part D claims for 203 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. 155 claims were for opioids.
Most prescribed
- Lisinopril108 claims
- Hydrocodone-Acetaminophen103 claims
- Levothyroxine Sodium103 claims
- Omeprazole94 claims
- Atorvastatin Calcium92 claims
- Furosemide76 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
- Wolf Point Clinic Association IncWolf Point, MT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark W. Zilkoski among 775 family medicine physician records in Montana
Mark W. Zilkoski, MD is one of 775 family medicine physician records with a practice address in Montana. 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 2006, is newer than 9% of them.
- NPI issued2006 · 9% of these records are older, 50% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated1977 · median 2007 among the 464 with a school on file
- Record last updated2008 · 53% 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 Montana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
2 family medicine physician records list a practice address in Wolf Point
They are 2 of the 66 NPPES records with a practice address in Wolf Point, and 775 family medicine physician records in Montana.
All 775 in Montana → Every provider in Wolf Point → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Michael Uphues, D.O.Wolf Point, MT 592011912003997
- Gordon Bell, M.D.Glasgow, MT 592301750393914
- David Knierim, M.D.Glasgow, MT 592301720346075
- Keenan Kuckler, MDGlasgow, MT 592301528649324
- Anne Millard, M.D.Glasgow, MT 592301780696062
- Michelle Ozark, FNP-CGlasgow, MT 592301538842885
- Kevin Ross, MDGlasgow, MT 592301649572355
- Kirk Stoner, MDPlentywood, MT 592541629013750
Common questions
What is Mark W. Zilkoski, MD's NPI number?
Mark W. Zilkoski, MD's National Provider Identifier (NPI) is 1801909080, issued on Aug 15, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark W. Zilkoski, MD located?
The NPPES record lists a practice address at 301 Knapp St, Wolf Point, MT, 59201. Phone: (406) 653-2150. Providers update this record themselves, so call before visiting.
How can I verify Mark W. Zilkoski, MD's license?
NPPES lists Montana license number 4533, 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 W. Zilkoski, MD prescribe under Medicare Part D?
In 2024, Mark W. Zilkoski, MD had 2,481 Medicare Part D claims for 203 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.