5
1 Rating with 1 written Review
Summary
Dr. Joan McMahon is an internal medicine physician who also specializes in hospital medicine and pediatrics. She earned her medical degree from St. Louis University School of Medicine and completed her residency at Charleston Area Medical Center. With three decades of medical practice, Dr. McMahon brings extensive experience to her comprehensive approach to patient care.
Dr. McMahon practices at Vista Plains Health and Central Montana Medical Center, with locations in Lewistown and Harlowton, Montana. She focuses on treating patients with chronic lung conditions such as COPD and other breathing disorders that may occur alongside additional health concerns. Her practice also includes breast cancer screening services and coordinating physical therapy for patients who need rehabilitative care. Patients consistently rate Dr. McMahon highly, giving her an average rating of 5.0 on Vitals.
Dr. McMahon practices at Vista Plains Health and Central Montana Medical Center, with locations in Lewistown and Harlowton, Montana. She focuses on treating patients with chronic lung conditions such as COPD and other breathing disorders that may occur alongside additional health concerns. Her practice also includes breast cancer screening services and coordinating physical therapy for patients who need rehabilitative care. Patients consistently rate Dr. McMahon highly, giving her an average rating of 5.0 on Vitals.
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
- 3 board certifications
- 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. Roy Nelson Kohler, MD | Dr. Richard N Taylor, MD | Dr. Peter Brown Lucas, MD |
| Internal Medicine | Internal Medicine | Internal Medicine | Psychiatry |
| Accepts New Patients | |||
| 30 Years of Experience | 39 Years of Experience | 53 Years of Experience | 45 Years of Experience |
| No Virtual Visit Option | No Virtual Visit Option | No Virtual Visit Option | No Virtual Visit Option |
| Speaks English | Speaks English, German | ||
| Lewistown , MT | Lewistown , MT | Lewistown , MT | Lewistown , MT |
| Med School: St Louis University School Of Medicine | Med School: University Of Missouri Columbia School Of Medicine | Med School: University Of Virginia School Of Medicine | Med School: Case Western Reserve University 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
- 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 my insurance?
- You can see the insurance plans that Dr. Joan Mcmahon accepts on their Vitals profile.
- 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 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.
- Where is Dr. Joan Mcmahon's office located?
- Dr. Joan Mcmahon's office is located at 408 Wendell Ave, Lewistown, MT, 59457.
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