NPPES file of Aug 9, 2026

Robert J. Naef, D.O.

Emergency Medicine Physician · Anaconda, MT

Robert J. Naef, D.O. is an emergency medicine physician with a practice address in Anaconda, Montana, and NPI 1265441604, issued on Aug 5, 2006. Check the license (Montana 11107, as entered in NPPES) on the Montana Board of Medical Examiners; the federal record below is the public data PlainDoctor holds for this provider.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1265441604
Name
Robert J. Naef
Credential
D.O.
Primary taxonomy
Emergency Medicine Physician 207P00000X
License number
11107 MT
Self-reported in NPPES; status is on the state search
Practice location
401 W Pennsylvania Ave, Anaconda, MT 59711
Phone
(406) 563-8500
Enumerated
Aug 5, 2006
Record last updated
Feb 20, 2019 (not updated in 7 years: call before relying on the address or phone)
Fax
(406) 563-8694
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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8 nearest emergency medicine physician records → All 243 in Montana → Look up another NPI →

Also registered at 401 W Pennsylvania Ave

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Barrett Adams, M.DEmergency Medicine Physician1043365067
  2. Paige Bahr, CSFASurgical Assistant1093535114
  3. Fredrick Bartoletti, M.D.Emergency Medicine Physician1508989971
  4. Emily Bitterman, R.D.Registered Dietitian1104705946
  5. Brian Bradley, CRNACertified Registered Nurse Anesthetist1881610616
  6. Lisa Buffington, PTAPhysical Therapy Assistant1043591845

Verify Robert J. Naef in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMontana Board of Medical Examiners
    Search for license 11107    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Montana license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Robert J. Naef among 243 emergency medicine physician records in Montana

Robert J. Naef, D.O. 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 not. Its NPI, issued in 2006, is newer than 1% of them.

  • NPI issued2006 · 1% of these records are older, 55% newer
  • In a Medicare fileNo · 81% of these records are
  • In the CMS Doctors and Clinicians fileNo · 60% of these records are
  • Record last updated2019 · 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).

8 emergency medicine physician records list a practice address in Anaconda

They are 8 of the 192 NPPES records with a practice address in Anaconda, and 243 emergency medicine physician records in Montana. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 243 in Montana → Every provider in Anaconda → Emergency Medicine Physician nationwide →

The 8 emergency medicine physician records with the nearest ZIP codes

  1. Barrett Adams, M.DAnaconda, MT 597111043365067
  2. Fredrick Bartoletti, M.D.Anaconda, MT 597111508989971
  3. Rishona Corson, M.D.Anaconda, MT 597111821268111
  4. Douglas Dunham, D.O.Anaconda, MT 597111598938318
  5. Daniel Hartmann, MDAnaconda, MT 597111578519369
  6. Andre Pennardt, M.D.Anaconda, MT 597111174502280
  7. Jonathan Schellenberg, D.O.Anaconda, MT 597111457612186
  8. Mary Drake, MDBozeman, MT 597151831109362

Common questions

What is Robert J. Naef, D.O.'s NPI number?

Robert J. Naef, D.O.'s National Provider Identifier (NPI) is 1265441604, issued on Aug 5, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Robert J. Naef, D.O. located?

The NPPES record lists a practice address at 401 W Pennsylvania Ave, Anaconda, MT, 59711. Phone: (406) 563-8500. Providers update this record themselves, so call before visiting.

How can I verify Robert J. Naef, D.O.'s license?

NPPES lists Montana license number 11107, 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.