5
1 Rating with 1 written Review
Summary
Dr. Joan McMahon has practiced internal medicine, hospital medicine, and pediatrics for 30 years and is affiliated with Vista Plains Health and Central Montana Medical Center. She treats type 2 diabetes mellitus, chronic kidney disease, and chronic kidney disease stage 5, and performs breast cancer screening, scintimammography, and digital breast tomosynthesis.
Dr. McMahon earned her medical degree from St. Louis University School of Medicine and completed her residency at Charleston Area Medical Center. She sees patients in Lewistown and Harlowton, Montana. Patients on Vitals rate Dr. McMahon 5 out of 5.
Dr. McMahon earned her medical degree from St. Louis University School of Medicine and completed her residency at Charleston Area Medical Center. She sees patients in Lewistown and Harlowton, Montana. Patients on Vitals rate Dr. McMahon 5 out of 5.
Overview based on verified provider data
Quick Facts
- accepting new patients
- 30 years of experience
- Charleston Area Medical Center
- 1 written review
- 3 specialties
- 5 areas of expertise
- 2 hospital affiliations
- 3 office locations
- Female
Patients’ Perspective
- Gave an accurate diagnosis
- Had a good bedside manner
- Spent time with me
Based on patient feedback. Read the reviews
Office Locations
Dr. Joan Marie Mcmahon has 3 locationsCmmc Clinic Physicians
408 Wendell Ave Ste 1Lewistown, MT 59457 Tel: (406) 535-7791
Mon8:00 am - 5:00 pm
Tue8:00 am - 5:00 pm
Wed8:00 am - 5:00 pm
Thu8:00 am - 5:00 pm
Fri8:00 am - 5:00 pm
SatClosed
SunClosed
Compare with Similar Doctors
 |  |  | |
| Dr. Joan Marie Mcmahon, MD | Dr. Adewumi Bakare DMSc, PA-C | Dr. Michael Eric Sura, MD | Dr. Hesham Rashad Shabana Omar, MD |
| Internal Medicine | Internal Medicine | Internal Medicine | Hospital Medicine |
| Accepts New Patients | Accepts New Patients | Accepts New Patients | Accepts New Patients |
| 30 Years of Experience | 21 Years of Experience | 25 Years of Experience | |
| No Virtual Visit Option | Virtual Visit Available | No Virtual Visit Option | No Virtual Visit Option |
| Speaks English, Spanish, Yoruba, French, Russian, Arabic, Chinese, Chinese (Mandarin) | Speaks English | ||
| Lewistown , MT | Mesquite , TX | Lewistown , MT | Martinsburg , WV |
| Med School: St Louis University School Of Medicine | Med School: University of Lynchburg - DMSc | Med School: University Of Nevada School Of Medicine | Med School: University Of California Davis School Of Medicine |
Current Profile | View Profile | View Profile | View Profile |
Insurance Plans Accepted by Dr. Joan Marie Mcmahon
Be sure to verify insurance information directly with your doctor's office, as it may undergo frequent changes.
Medical Specialties
Dr. Joan Marie Mcmahon has the following 3 specialties
Specialty Expertise
Dr. Joan Marie Mcmahon has the following 5 areas of expertise
Certifications, License, & Education
30 Years Experience
Dr. Joan Marie Mcmahon holds an expired medical license in the state of Montana.
Medical License
Medical Doctor with an expired medical license in the state of Montana that expired in 2026.
Education & Training
Residency
Completed their residency at Charleston Area Medical Center.
Medical School
Graduated from St Louis University School Of Medicine in 1996.
NPI Number
Dr. Mcmahon's NPI number is 1467403345.
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Frequently Asked Questions
- How can I make an appointment with Dr. Joan Mcmahon?
- You can find contact information for Dr. Joan Mcmahon here on Vitals.
- Does Dr. Joan Mcmahon accept my insurance?
- You can see the insurance plans that Dr. Joan Mcmahon accepts on their Vitals profile.
- Is Dr. Joan Mcmahon accepting new patients?
- Dr. Joan Mcmahon is accepting new patients on Vitals. View Dr. Joan Mcmahon's profile on Vitals to make an appointment.
- Does Dr. Joan Mcmahon accept virtual/telehealth appointments?
- Dr. Joan Mcmahon has not indicated that they accept virtual/teleheatlh appointments. Contact their office through their Vitals profile to check for availability.
- Which hospitals is Dr. Joan Mcmahon affiliated with?
- Dr. Joan Mcmahon is affiliated with Vista Plains Health and Central Montana Medical Center.
Data Sources
This provider profile is built using data from:
- NPPES NPI Registry
- State medical licensing boards
- Healthcare system and provider network data
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