Charles O. Allen, DO
Emergency Medicine Physician · Big Sky, MT
Charles O. Allen, DO is an emergency medicine physician with a practice address in Big Sky, Montana, and NPI 1174609432, issued on Oct 30, 2006. Check the license (Montana 67187, as entered in NPPES) on the Montana Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Charles O. Allen
- Credential
- DO
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 67187 MT
Self-reported in NPPES; status is on the state search - Practice location
- 334 Town Center Ave, Big Sky, MT 59716
- Phone
- (406) 995-6995
- Enumerated
- Oct 30, 2006
- Record last updated
- Mar 13, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicaid ID
- 1174609432 MT
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 243 in Montana → Look up another NPI →
Also registered at 334 Town Center Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Maureene Andrews, PA-CMedical Physician Assistant1396813788
- Heidi Bowman, DPTPhysical Therapist1154617504
- Alice Bremner, M.D.Internal Medicine Physician1730574674
- Lisa Brubaker, LCSWClinical Social Worker1922402882
- Anna Carl, MDEmergency Medicine Physician1811979909
- Maren Dunn, DOFamily Medicine Physician1376538512
Verify Charles O. Allen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMontana Board of Medical Examiners
Search for license 67187Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
45% more Medicare Part D claims than the average emergency medicine physician in 2024
327 Medicare Part D claims for 215 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 79 claims were for opioids.
Most prescribed
- Hydrocodone-Acetaminophen47 claims
- Prednisone32 claims
- Azithromycin13 claims
- Cephalexin12 claims
- Ondansetron Odt12 claims
- Amoxicillin-Clavulanate Potass11 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.
Charles O. Allen among 243 emergency medicine physician records in Montana
Charles O. Allen, DO is one of 243 emergency medicine physician records with a practice address in Montana. 81% 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 1% of them.
- NPI issued2006 · 1% of these records are older, 55% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileNo · 60% of these records are
- Record last updated2020 · 51% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Montana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
9 emergency medicine physician records list a practice address in Big Sky
They are 9 of the 52 NPPES records with a practice address in Big Sky, and 243 emergency medicine physician records in Montana.
All 243 in Montana → Every provider in Big Sky → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Anna Carl, MDBig Sky, MT 597161811979909
- Robert Jensen, MDBig Sky, MT 597161164469698
- Tyler Martinez, DOBig Sky, MT 597161437391984
- Gregory McCormick, MDBig Sky, MT 597161962080291
- Casey McGowan, M.D.Big Sky, MT 597161417489659
- Matthew Valente, M.D.Big Sky, MT 597161942469598
- Kirk Weber, M.D.Big Sky, MT 597161891894432
- Stephanie Abraham, M.D.Bozeman, MT 597151306135785
Common questions
What is Charles O. Allen, DO's NPI number?
Charles O. Allen, DO's National Provider Identifier (NPI) is 1174609432, issued on Oct 30, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Charles O. Allen, DO located?
The NPPES record lists a practice address at 334 Town Center Ave, Big Sky, MT, 59716. Phone: (406) 995-6995. Providers update this record themselves, so call before visiting.
How can I verify Charles O. Allen, DO's license?
NPPES lists Montana license number 67187, 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 Charles O. Allen, DO prescribe under Medicare Part D?
In 2024, Charles O. Allen, DO had 327 Medicare Part D claims for 215 beneficiaries; the average among emergency medicine physician prescribers was 226. 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.