Mark T. Welch, MD
Internal Medicine Physician · Kalispell, MT
Mark T. Welch, MD is an internal medicine physician with a practice address in Kalispell, Montana, and NPI 1164561619, issued on Feb 5, 2007. Check the license (Montana 8817, as entered in NPPES) on the Montana Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Mark T. Welch
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 8817 MT
Self-reported in NPPES; status is on the state search - Practice location
- 310 Sunnyview LN, Kalispell, MT 59901
- Phone
- (406) 751-5310
- Enumerated
- Feb 5, 2007
- Record last updated
- Nov 27, 2023
- Medicaid ID
- 0066946 MT
- Medicare enrollment
- Enrolled (PECOS I20031121000845); accepts Medicare assignment
- Medical or professional school
- University Of Illinois College Of Med (Chi/Peor/Rock/Chm-Urb), 1989
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 324 in Montana → Look up another NPI →
Also registered at 310 Sunnyview LN
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- George Allen, DOAnesthesiology Physician1386987113
- Jonathan Amick, D.O.Anesthesiology Physician1770786154
- Jonathan Anderson, MDAnesthesiology Physician1174634745
- Kendall Babb, ACNP-BCAcute Care Nurse Practitioner1417204710
- Geoffrey Baker, DOFamily Medicine Physician1285084764
Verify Mark T. Welch in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMontana Board of Medical Examiners
Search for license 8817Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average internal medicine physician in 2024
71 Medicare Part D claims for 27 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of 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 2 group practices
- Kalispell Regional Medical Center IncKalispell, MT
- St Johns Lutheran Hospital IncLibby, MT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark T. Welch among 324 internal medicine physician records in Montana
Mark T. Welch, MD is one of 324 internal medicine physician records with a practice address in Montana. 72% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 56% of them.
- NPI issued2007 · 56% of these records are older, 38% newer
- In a Medicare fileYes · 72% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated1989 · median 2006 among the 191 with a school on file
- Record last updated2023 · 52% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Montana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
30 internal medicine physician records list a practice address in Kalispell
They are 30 of the 1,650 NPPES records with a practice address in Kalispell, and 324 internal medicine physician records in Montana.
All 324 in Montana → Every provider in Kalispell → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Ann Bukacek, M.D.Kalispell, MT 599011295707776
- Laura Csaplar, MDKalispell, MT 599011497760185
- Kimberly DamrowKalispell, MT 599011548267347
- Stephen Evans, M.D.Kalispell, MT 599011215970793
- Christopher Gill, MDKalispell, MT 599011417998568
- David Habel, M.D.Kalispell, MT 599011992747927
- Jamie Hettick, MDKalispell, MT 599011285744599
- Marise Johnson, M.D.Kalispell, MT 599011013958537
Common questions
What is Mark T. Welch, MD's NPI number?
Mark T. Welch, MD's National Provider Identifier (NPI) is 1164561619, issued on Feb 5, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Mark T. Welch, MD located?
The NPPES record lists a practice address at 310 Sunnyview LN, Kalispell, MT, 59901. Phone: (406) 751-5310. Providers update this record themselves, so call before visiting.
How can I verify Mark T. Welch, MD's license?
NPPES lists Montana license number 8817, 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 T. Welch, MD prescribe under Medicare Part D?
In 2024, Mark T. Welch, MD had 71 Medicare Part D claims for 27 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.