1. MyMercy Account
Set Location Use Current Location
Sign In
Set Location Use Current Location

John Arthur Nash, MD

Mercy Clinic
John Arthur Nash, MD, Mercy

John Arthur Nash, MD

Specialty

  • Cardiology

Online Services

Schedule Online
(4.9/5)
802 Ratings | 195 Comments
Accepting new patients
Location of Your Visit
Mercy Clinic Heart and Vascular - Clayton-Clarkson Suite 230-A
15945 Clayton Road, Suite 230ABallwin, MO 63011
Mercy Clinic Heart and Vascular - Clayton-Clarkson Suite 230-APhone: (636) 256-5240

Select a Location

To schedule an in-person or video visit (available only through certain locations).

Mercy Clinic Heart and Vascular - Mercy Heart Hospital St. Louis
625 S. New Ballas Road, Suite 2015St. Louis, MO 63141
Phone: (314) 251-1700
408.0 Miles
Mercy Clinic Heart and Vascular - Dunn Road
755 Dunn Road, Suite 160Hazelwood, MO 63042
Phone: (314) 251-1775
401.8 Miles
Mercy Clinic Heart and Vascular - Clayton-Clarkson Suite 230-A
15945 Clayton Road, Suite 230ABallwin, MO 63011
Phone: (636) 256-5240
416.0 Miles

Select a Visit Type

To ensure the highest quality patient care, please select the most appropriate visit type, as length of visits vary. If you do not see your visit type, please call.

Existing Patient - Office Visit

I've seen this provider within the last three years and need an appointment (other than for a routine physical or well check). This is a standard visit length.

New Patient - Office Visit

I am new to this provider or it has been three years since my last visit. This is an extended visit length.

Questions? Call:
(636) 256-5240
Need a Heart Expert?
Whether you've had a heart attack, suffer from atrial fibrillation, or experience rapid heart rhythms, Mercy heart specialists can help. If you have an HMO plan, your insurance may require a referral from your primary care physician. Please contact your primary care physician prior to your appointment with the specialist to obtain the necessary referral.

Select a Time

Please select your preferred time slot for your appointment.

Location and Contact Information

About John Arthur Nash, MD

Care Philosophy I chose to become a physician because of my love of science and my desire to work closely with others. I was drawn to cardiology because the heart is often thought of as providing the vital force which keeps us alive. I strive to work closely with patients and their families, to help them understand and manage their heart condition in an effort maximize their physical and emotional well-being and enhance their quality of life.
Current Time 0:00
Duration 0:00
Loaded: 0%
Stream Type LIVE
Remaining Time 0:00
 
1x
  • Chapters
  • descriptions off, selected
  • captions off, selected
      Education
      Medical School
      • Vanderbilt University School of Medicine
      Fellowships
      • Washington Univeristy - Barnes-Jewish Hospital-Cardiovascular Disease
      Residency
      • University of Pennsylvania-Internal Medicine
      Specialty
      Board Certifications
      • American Board of Internal Medicine (Cardiovascular Disease)
      Affiliations
      • Mercy Hospital St. Louis
      Languages
      • English
      Looking for more options?
      Find the Mercy provider who's right for you.
      View all Cardiology providers.
      Looking for more options?
      Find the Mercy provider who's right for you.
      View all Cardiology providers.

      Patient Ratings and Comments

      Rating

      From 794 patients
      (4.9/5)
      The provider rating is an average based on Mercy Clinic's post-care survey responses. To find out more, check out our frequently asked questions.

      Comments

      Viewing 1-3 of 193 comments
      Highlights from patients about their experience with this provider:
      • Mar 4, 2025
        (5/5)
        although we have only been with this team since 2019 they treat us as if we had with them for a life time
      • Mar 3, 2025
        (4/5)
        Parking was difficult
      • Feb 28, 2025
        (5/5)
        Wonderful