Mark Howard Nicholson, MD
Psychiatry Physician · Billings, MT
Mark Howard Nicholson, MD is a psychiatry physician with a practice address in Billings, Montana, and NPI 1235126566, issued on Oct 3, 2005. Check the license (Montana 7623, as entered in NPPES) on the Montana Board of Medical Examiners; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Mark Howard Nicholson
- Credential
- MD
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- 7623 MT
Self-reported in NPPES; status is on the state search - Practice location
- 1018 N 30TH St, Billings, MT 59101
- Phone
- (406) 245-1559
- Enumerated
- Oct 3, 2005
- Record last updated
- Feb 22, 2016 (not updated in 10 years: call before relying on the address or phone)
- Fax
- (406) 564-1313
- Entity
- Type 1 · individual
Also registered at 1018 N 30TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Joshua Berst, LCSWClinical Social Worker1649040643
- Dawn Birk, PH.D.Clinical Child & Adolescent Psychologist1295762193
- Bobbi Blain, LCPCProfessional Counselor1952832453
- Bryan Cantwell, MS, LCPCMental Health Counselor1063014694
- Jenna Christensen, LCPCProfessional Counselor1588435333
- Kaitlin Kavlie, PCLCProfessional Counselor1679344899
Verify Mark Howard Nicholson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMontana Board of Medical Examiners
Search for license 7623Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
41 psychiatry physician records list a practice address in Billings
They are 41 of the 4,035 NPPES records with a practice address in Billings, and 156 psychiatry physician records in Montana. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 41 in Billings → All 156 in Montana → Every provider in Billings →
Other psychiatry physician records in Montana
- Nora Abdullah, MDMissoula, MT1295354298
- Graig Aders, M.D.Great Falls, MT1265758734
- Erin Amato, MDBillings, MT1447425178
- Alexis Anderson, D.O.Bozeman, MT1124162177
- Deanna Armstrong, M.D.Helena, MT1003900184
- Eric Arzubi, M.D.Billings, MT1770738353
- Kary Aytes, MDMissoula, MT1831261189
- Mary Bassingthwaighte, MDMissoula, MT1346399912
- Julia Bell, MDHamilton, MT1780664318
- Daniel Bemporad, D.O.Warm Springs, MT1811438120
Common questions
What is Mark Howard Nicholson, MD's NPI number?
Mark Howard Nicholson, MD's National Provider Identifier (NPI) is 1235126566, issued on Oct 3, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Mark Howard Nicholson, MD located?
The NPPES record lists a practice address at 1018 N 30TH St, Billings, MT, 59101. Phone: (406) 245-1559. Providers update this record themselves, so call before visiting.
How can I verify Mark Howard Nicholson, MD's license?
NPPES lists Montana license number 7623, 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.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. 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.