Summary

Dr. Jonathan Hemphill specializes in cardiovascular disease and interventional cardiology, bringing advanced expertise to heart care. He earned his medical degree from St. George University and completed his residency at the University of New Mexico. Dr. Hemphill holds certification in internal medicine from the American Board of Internal Medicine and speaks English.

Dr. Hemphill practices at Mercy San Juan Medical Center with locations throughout Northern California, including Grass Valley, Sacramento, Folsom, and Carmichael. He focuses on treating high blood pressure conditions and hypertensive emergencies. His procedural expertise includes performing electrocardiograms and specialized heart imaging tests like contrast echocardiography. Patients have given him an average rating of 5.0 on Vitals.

AI-generated from data on this provider profile.

Quick Facts

  • accepting new patients
  • 5
  • 40 insurance plans accepted
  • speaks English
  • University of New Mexico
  • 28 written reviews
  • 1 award
  • 2 specialties
  • 17 areas of expertise
  • 2 board certifications
  • 1 hospital affiliation
  • 5 office locations
  • Male

Patients’ Perspective

  • Gave an accurate diagnosis
  • Had a good bedside manner
  • Spent time with me

Awards

  • Vitals Preferred Provider

    • Vitals Preferred Provider Award
      • Preferred Provider badge recognizes providers that are committed to transparency, responsiveness and great service to patients, and have earned a high patient satisfaction rating.

  • Click for our Methodology

Office Locations

Dr. Jonathan A. Hemphill has 5 locations

Cardiology - Dignity Health Medical Group - Grass Valley, CA

150 Catherine Ln Suite D, F & JGrass Valley, CA 95945

Mercy Medical Plaza - Sacramento, CA (North Lobby)

3941 J StSacramento, CA 95819
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

Mercy Medical Plaza - Sacramento, CA (South Lobby)

3939 J StSacramento, CA 95819
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

Specialty Care - Mercy Physicians Plaza - San Juan, Carmichael, CA

6555 Coyle AveCarmichael, CA 95608
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

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Dr. Jonathan A. Hemphill, MDDr. Raghav Sharma, MDDr. Timothy Y. Lee, MDDr. Nathaniel Rohde Woodruff, MD
Cardiovascular DiseaseCardiovascular DiseaseCardiovascular DiseaseCardiovascular Disease
Accepts New Patients Accepts New Patients Accepts New Patients
4.8 
4.3 
16 Years of Experience 39 Years of Experience
No Virtual Visit Option Virtual Visit Available No Virtual Visit Option No Virtual Visit Option
Speaks English Speaks English, Hindi Speaks English, Chinese Speaks English, Spanish
Grass Valley , CAWinter Park , FLGrass Valley , CAGrass Valley , CA
Med School: St. George University Med School: New York Medical College Med School: George Washington University Med School: Case Western Reserve University School Of Medicine
Current Profile
View Profile View Profile View Profile

Insurance Plans Accepted by Dr. Jonathan A. Hemphill

  • AARP
  • Aetna
  • Aetna - HMO
  • Alignment Health Plan
  • AltaMed Senior BuenaCare (PACE)
  • Anthem Blue Cross
  • Blue Cross Blue Shield
  • Blue Cross Blue Shield of Oklahoma
  • Blue Cross Blue Shield of Tennessee
  • Blue Cross Blue Shield of Texas
  • BLUE CROSS of CALIFORNIA - HMO
  • Blue Shield of California
  • Blue Shield of California - HMO
  • Brand New Day
  • CenCal Health
  • Cigna
  • Golden State Medicare Health Plan
  • Golden State Medicare Health Plan - Medicare
  • Health Net
  • Health Net - HMO
  • Health Plan of San Joaquin
  • Humana
  • Imperial Health Plan of California
  • Kaiser Permanente
  • Medicaid - Medicaid
  • Medicaid - Medicaid (Managed)
  • Medicare
  • Medicare - Medicaid
  • Medicare - Medicare
  • Mercy Care
  • Molina Healthcare
  • Partnership HealthPlan of California
  • State Farm
  • Tricare
  • UnitedHealthcare
  • UnitedHealthcare - HMO
  • UnitedHealthcare - Medicare
  • UnitedHealthcare - Medicare (Advantage HMO)
  • Western Health Advantage
  • Western Health Advantage - HMO

Medical Specialties

Dr. Jonathan A. Hemphill has the following 2 specialties

Specialty Expertise

Dr. Jonathan A. Hemphill has the following 17 areas of expertise

  • Acute Coronary Syndrome (ACS)
  • Arrhythmia
  • Atherosclerosis
  • Atrial Fibrillation
  • Blood Clot
  • Heart Attack
  • Heart Block
  • Heart Diseases
  • Heart Failure
  • High Blood Pressure (Hypertension)
  • High Cholesterol
  • High Cholesterol (Hypercholesterolemia)
  • Hypertension
  • Infertility
  • Interventional Cardiology
  • Stroke
  • Unstable Angina

Certifications, License, & Education

BOARD CERTIFICATIONS

American Board of Internal Medicine

Internal medicine

MEDICAL LICENSE

Medical Doctor, California, 2025, Expired

EDUCATION & TRAINING

Residency

University of New Mexico

Medical School

St. George University

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Frequently Asked Questions

Where is Dr. Jonathan Hemphill's office located?
Dr. Jonathan Hemphill's office is located at 150 Catherine Ln Suite D, F & J, Grass Valley, CA, 95945.
Which hospitals is Dr. Jonathan Hemphill affiliated with?
Dr. Jonathan Hemphill is affiliated with Mercy San Juan Medical Center.
How can I make an appointment with Dr. Jonathan Hemphill?
You can find contact information for Dr. Jonathan Hemphill here on Vitals.
Is Dr. Jonathan Hemphill accepting new patients?
Dr. Jonathan Hemphill is accepting new patients on Vitals. View Dr. Jonathan Hemphill's profile on Vitals to make an appointment.
Does Dr. Jonathan Hemphill accept my insurance?
You can see the insurance plans that Dr. Jonathan Hemphill accepts on their Vitals profile.

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