Steven Bradley Sonntag, MD
General Practice Physician · Lame Deer, MT
Steven Bradley Sonntag, MD is a general practice physician with a practice address in Lame Deer, Montana, and NPI 1215005335, issued on Nov 30, 2006. Check the license (Montana 10265, as entered in NPPES) on the Montana Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Steven Bradley Sonntag
- Credential
- MD
- Primary taxonomy
- General Practice Physician 208D00000X
- License number
- 10265 MT
Self-reported in NPPES; status is on the state search - Practice location
- 100 Cheyenne Ave., Lame Deer, MT 59043
- Phone
- (406) 477-4484
- Enumerated
- Nov 30, 2006
- Record last updated
- Jan 31, 2018 (not updated in 8 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20101221001071); accepts Medicare assignment
- Medical or professional school
- University Of New Mexico School Of Medicine, 1996
- Entity
- Type 1 · individual
8 nearest general practice physician records → All 36 in Montana → Look up another NPI →
Also registered at 100 Cheyenne Ave.
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Lashawna Beartusk, RNRegistered Nurse1881556108
- John Bradley, PH.D.Clinical Psychologist1033243837
- Roberta Cady, RNRegistered Nurse1336392091
- Todd Crockett, D.D.S.Dentist1457560815
- Molly Jones, R.N.General Practice Registered Nurse1689829996
- Mary McEnery, DMDPediatric Dentistry1326172677
Verify Steven Bradley Sonntag in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMontana Board of Medical Examiners
Search for license 10265Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- U S Health Dept OF Health And Human ServicesLame Deer, MT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Steven Bradley Sonntag among 36 general practice physician records in Montana
Steven Bradley Sonntag, MD is one of 36 general practice physician records with a practice address in Montana. 47% 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 11% of them.
- NPI issued2006 · 11% of these records are older, 39% newer
- In a Medicare fileYes · 47% of these records are
- In the CMS Doctors and Clinicians fileYes · 19% of these records are
- Record last updated2018 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208D00000X and a Montana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
1 general practice physician record lists a practice address in Lame Deer
They are 1 of the 79 NPPES records with a practice address in Lame Deer, and 36 general practice physician records in Montana.
All 36 in Montana → Every provider in Lame Deer → General Practice Physician nationwide →
The 8 general practice physician records with the nearest ZIP codes
- Susan Wicklund, M.D.Livingston, MT 590471487624953
- David Carlson, MDBillings, MT 591011891804589
- Christine Gerhard, M.D.Billings, MT 591011295846988
- Edward Uriell, MDBillings, MT 591021124687876
- Don Helland, MDCulbertson, MT 592181225052046
- Wally Jean, MDPoplar, MT 592551346654167
- Ray Laboy Espada, M.D.Poplar, MT 592551124066741
- Darryl Espeland, DOBaker, MT 593131093745572
Common questions
What is Steven Bradley Sonntag, MD's NPI number?
Steven Bradley Sonntag, MD's National Provider Identifier (NPI) is 1215005335, issued on Nov 30, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Steven Bradley Sonntag, MD located?
The NPPES record lists a practice address at 100 Cheyenne Ave., Lame Deer, MT, 59043. Phone: (406) 477-4484. Providers update this record themselves, so call before visiting.
How can I verify Steven Bradley Sonntag, MD's license?
NPPES lists Montana license number 10265, 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. 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.