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Dr. Joan Mass, MD

Dr. Joan Mass, MD

Internal Medicine*
45+ years of experience

Dr. Joan Mass, MD is an internist in Saint Charles, MO and has over 45 years of experience in the medical field. She graduated from Temple University in 1977. She is affiliated with medical facilities such as Christian Hospital and SSM Health St. Joseph Hospital-Lake Saint Louis.

Practice

300 1st Capitol Dr Saint Charles, MO 63301

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About Me

biography

Dr. Joan Mass, MD is an internist in Saint Charles, MO and has over 45 years of experience in the medical field. She graduated from Temple University in 1977. She is affiliated with medical facilities such as Christian Hospital and SSM Health St. Joseph Hospital-Lake Saint Louis.
  • Internal Medicine

*Healthgrades does not verify qualifications for medical specialties. Please verify your provider's specialty and qualifications directly with your provider and applicable medical board.

  • Temple University

    Medical School, 1977
American Board of Medical Specialties®
American Board of Internal Medicine®
Internal Medicine
For detailed information about any of the below board actions, please search for the provider's records on the linked state licensing board or the Federation of State Medical Boards. To learn more about the difference between these sources, please refer to our FAQs.
Healthgrades has not received any data indicating a board action exists for this provider.

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Locations

Practice

Ssm Health St. Joseph-St. Charles300 1st Capitol Dr Saint Charles, MO 63301
1

Practice

Office12125 Woodcrest Executive Dr Ste 220 Saint Louis, MO 63141
2

Affiliated Hospitals

  • SSM Health St. Joseph Hospital-Lake Saint Louis

    100 Medical Plz
    Lake Saint Louis, MO 63367
    Recipient of 2
    hospital awards

    Patient Safety Excellence Award™ (2025)

    Top in the nation for providing excellence in patient safety by preventing infections, medical errors, and other preventable complications

    View all awards

    How patients felt about the care they received at this hospital.

    83%
    Patients said they were given information about recovering at home

    1% lower than the national average

    76%
    Patients said that nurses always listened to them and explained things well

    1% higher than the national average

    View all patient feedback
  • SSM Health St. Joseph Hospital-St. Charles

    300 1st Capitol Dr
    Saint Charles, MO 63301
    Recipient of 6
    hospital awards

    Patient Safety Excellence Award™ (2024, 2023)

    Top in the nation for providing excellence in patient safety by preventing infections, medical errors, and other preventable complications

    View all awards

    How patients felt about the care they received at this hospital.

    84%
    Patients said they were given information about recovering at home
    74%
    Patients said that nurses always listened to them and explained things well

    1% lower than the national average

    View all patient feedback
  • Christian Hospital

    11133 Dunn Rd
    Saint Louis, MO 63136
    Recipient of 8
    hospital awards

    Patient Safety Excellence Award™ (2025, 2024)

    Top in the nation for providing excellence in patient safety by preventing infections, medical errors, and other preventable complications

    View all awards

    How patients felt about the care they received at this hospital.

    86%
    Patients said they were given information about recovering at home

    2% higher than the national average

    78%
    Patients said that nurses always listened to them and explained things well

    3% higher than the national average

    View all patient feedback
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