Johanna Dreiling, M.D.
Family Medicine Physician · Hamilton, MT
Johanna Dreiling, M.D. is a family medicine physician with a practice address in Hamilton, Montana, and NPI 1114174414, issued on Aug 19, 2008. Check the license (Montana 12495, as entered in NPPES) on the Montana Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Johanna Dreiling
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 12495 MT
Self-reported in NPPES; status is on the state search - Practice location
- 623 S 4TH St, Hamilton, MT 59840
- Phone
- (406) 544-0295
- Enumerated
- Aug 19, 2008
- Record last updated
- Jan 14, 2026
- Medicare enrollment
- Enrolled (PECOS I20101208001209); accepts Medicare assignment
- Medical or professional school
- Mayo Medical School, 2007
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 775 in Montana → Look up another NPI →
Verify Johanna Dreiling in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMontana Board of Medical Examiners
Search for license 12495Check 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% fewer Medicare Part D claims than the average family medicine physician in 2024
2,096 Medicare Part D claims for 145 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 8% of claims. 51 claims were for opioids.
Most prescribed
- Losartan Potassium127 claims
- Atorvastatin Calcium112 claims
- Levothyroxine Sodium99 claims
- Omeprazole68 claims
- Amlodipine Besylate52 claims
- Gabapentin52 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.
Industry payments in 2024: $27.08
1 payment: food and beverage; the largest payer was Astellas Pharma US Inc. The 55,478 providers of this specialty with any payment received $902.55 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 3 group practices
- Partnership Health Center IncMissoula, MT
- Sapphire Community Health IncHamilton, MT
- True North Transformative Health LLCHamilton, MT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Johanna Dreiling among 775 family medicine physician records in Montana
Johanna Dreiling, M.D. 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 2008, is newer than 60% of them.
- NPI issued2008 · 60% of these records are older, 35% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated2007 · median 2007 among the 464 with a school on file
- Record last updated2026 · 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).
20 family medicine physician records list a practice address in Hamilton
They are 20 of the 399 NPPES records with a practice address in Hamilton, and 775 family medicine physician records in Montana.
All 775 in Montana → Every provider in Hamilton → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Walker Ashcraft, MDHamilton, MT 598401265485114
- Teresa Borino, M.D.Hamilton, MT 598401700847498
- Lawrence Brouwer, MDHamilton, MT 598401306922885
- Carol Calderwood, MDHamilton, MT 598401487607354
- Mandi Griffin, M.D.Hamilton, MT 598401649476680
- Kathleen Harder-Brouwer, MDHamilton, MT 598401730265208
- Harvard Heath, M.D.Hamilton, MT 598401811958523
- Allen Jones, M.D.Hamilton, MT 598401114926102
Common questions
What is Johanna Dreiling, M.D.'s NPI number?
Johanna Dreiling, M.D.'s National Provider Identifier (NPI) is 1114174414, issued on Aug 19, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Johanna Dreiling, M.D. located?
The NPPES record lists a practice address at 623 S 4TH St, Hamilton, MT, 59840. Phone: (406) 544-0295. Providers update this record themselves, so call before visiting.
How can I verify Johanna Dreiling, M.D.'s license?
NPPES lists Montana license number 12495, 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 Johanna Dreiling, M.D. prescribe under Medicare Part D?
In 2024, Johanna Dreiling, M.D. had 2,096 Medicare Part D claims for 145 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.