Jonathan A. Hemphill, MD | Grass Valley, CA | Cardiologist

.about .noScriptHide .nojs-show,.truncated [data-rem],blockquote .truncated-text{ display: initial !important}.no-js-hide,.ellipsis { display: none; }.truncated:after {content: '' !important}

Dr. Jonathan Hemphill is a cardiologist who specializes in cardiovascular disease and interventional cardiology. He earned his medical degree from St. George University and completed his residency training at the University of New Mexico. Dr. Hemphill is certified in internal medicine by the American Board of Internal Medicine and speaks English.

Dr. Hemphill practices at Mercy San Juan Medical Center and sees patients across multiple locations in California, including Grass Valley, Sacramento, Folsom, and Carmichael. He treats patients with high blood pressure and hypertensive emergencies. His practice includes performing heart rhythm tests and specialized heart imaging studies. Patients rate Dr. Hemphill 5.0 out of 5 stars on average.

Overview based on verified provider data

accepting new patients
5

40 Ratings
40 insurance plans accepted
speaks English
University of New Mexico
32 written reviews
1 award
2 specialties
17 areas of expertise
2 board certifications
1 hospital affiliation
5 office locations
Male

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

Based on patient feedback. Read the reviews

Jonathan A. Hemphill's Ratings and Reviews

5

40 Ratings with 32 written Reviews

Average Wait Time 8 Minutes

How was your appointment with
Jonathan Hemphill?

Patients’ Perspective

Gave an accurate diagnosis: (6) Did WellNeeds Improvement (0)
Had a good bedside manner: (6) Did WellNeeds Improvement (0)
Spent time with me: (6) Did WellNeeds Improvement (0)
Provided follow-up after the visit: (6) Did WellNeeds Improvement (0)
Flexible scheduling: (6) Did WellNeeds Improvement (0)
Saw me in a timely manner: No Ratings
Staff was courteous: (1) Did WellNeeds Improvement (0)

Patients consistently praise Dr. Jonathan Arn Hemphill for being an outstanding cardiologist who is caring, competent, and provides detailed explanations, often going above and beyond in enhancing care programs. Positive reviews emphasize his long-term relationships with patients, highlighting his personable nature and thorough care approach. The reviews lack negative comments, indicating a high level of patient satisfaction and trust in Dr. Hemphill's expertise and care.

AI-generated from the text of patient reviews

40 ratings & reviews

Sort:

Showing 1 to 10 of 32 reviews

.rating-and-reviews .noScriptHide .nojs-show,.truncated [data-rem],blockquote .truncated-text{ display: initial !important}.no-js-hide,.ellipsis { display: none; }.truncated:after {content: '' !important}

I can't say enough good about Dr. Hemphill! He's been our cardiologist for over 20 years. He's simply the BEST! In every respect.

Did Well

Needs Improvement

Gave an accurate diagnosis
Had a good bedside manner
Spent time with me
Provided follow-up after the visit
Flexible scheduling
Saw me in a timely manner
Staff was courteous

May 20th, 2026 | Source: Partner

.rating-and-reviews .noScriptHide .nojs-show,.truncated [data-rem],blockquote .truncated-text{ display: initial !important}.no-js-hide,.ellipsis { display: none; }.truncated:after {content: '' !important}

Doctor is the BESt

Did Well

Needs Improvement

Gave an accurate diagnosis
Had a good bedside manner
Spent time with me
Provided follow-up after the visit
Flexible scheduling
Saw me in a timely manner
Staff was courteous

May 18th, 2026 | Source: Partner

.rating-and-reviews .noScriptHide .nojs-show,.truncated [data-rem],blockquote .truncated-text{ display: initial !important}.no-js-hide,.ellipsis { display: none; }.truncated:after {content: '' !important}

DR. Hemphill is a very good doctor and Explains everything in great detail

Did Well

Needs Improvement

Gave an accurate diagnosis
Had a good bedside manner
Spent time with me
Provided follow-up after the visit
Flexible scheduling
Saw me in a timely manner
Staff was courteous

April 17th, 2026 | Source: Partner

.rating-and-reviews .noScriptHide .nojs-show,.truncated [data-rem],blockquote .truncated-text{ display: initial !important}.no-js-hide,.ellipsis { display: none; }.truncated:after {content: '' !important}

This was a second opinion appointment after seeing another cardiologist outside Dignity. Dr. Hemphill was AMAZING. Took time to walk through everything with me (with pictures, etc.). Completely cleared my head about my condition and gave me a clear path forward. Enhanced my care program with additional lab work and a more comprehensive quality plan forward. This is the third Dignity physician outside my health plan, and the third one to be phenomenal. Thank you so much for the quality physicians in your system. They are, quite literally, life savers.

Did Well

Needs Improvement

Gave an accurate diagnosis
Had a good bedside manner
Spent time with me
Provided follow-up after the visit
Flexible scheduling
Saw me in a timely manner
Staff was courteous

March 7th, 2026 | Source: Partner

.rating-and-reviews .noScriptHide .nojs-show,.truncated [data-rem],blockquote .truncated-text{ display: initial !important}.no-js-hide,.ellipsis { display: none; }.truncated:after {content: '' !important}

I have the utmost confidence in Dr. Hemphill!

Did Well

Needs Improvement

Gave an accurate diagnosis
Had a good bedside manner
Spent time with me
Provided follow-up after the visit
Flexible scheduling
Saw me in a timely manner
Staff was courteous

January 21st, 2026 | Source: Partner

.rating-and-reviews .noScriptHide .nojs-show,.truncated [data-rem],blockquote .truncated-text{ display: initial !important}.no-js-hide,.ellipsis { display: none; }.truncated:after {content: '' !important}

Dr. Hemphill is the best! He took care of both my parents for years. And now my sister and me for nearly a decade.

Did Well

Needs Improvement

Gave an accurate diagnosis
Had a good bedside manner
Spent time with me
Provided follow-up after the visit
Flexible scheduling
Saw me in a timely manner
Staff was courteous

January 14th, 2026 | Source: Partner

.rating-and-reviews .noScriptHide .nojs-show,.truncated [data-rem],blockquote .truncated-text{ display: initial !important}.no-js-hide,.ellipsis { display: none; }.truncated:after {content: '' !important}

Very personable. Easy to talk to . Gave a quick but well rounded synopsis of options.

Did Well

Needs Improvement

Gave an accurate diagnosis
Had a good bedside manner
Spent time with me
Provided follow-up after the visit
Flexible scheduling
Saw me in a timely manner
Staff was courteous

January 4th, 2026 | Source: Partner

.rating-and-reviews .noScriptHide .nojs-show,.truncated [data-rem],blockquote .truncated-text{ display: initial !important}.no-js-hide,.ellipsis { display: none; }.truncated:after {content: '' !important}

Dr Hemphill is the best. Been seeing him for 16 years, great guy!!

Did Well

Needs Improvement

Gave an accurate diagnosis
Had a good bedside manner
Spent time with me
Provided follow-up after the visit
Flexible scheduling
Saw me in a timely manner
Staff was courteous

August 29th, 2025 | Source: Partner

.rating-and-reviews .noScriptHide .nojs-show,.truncated [data-rem],blockquote .truncated-text{ display: initial !important}.no-js-hide,.ellipsis { display: none; }.truncated:after {content: '' !important}

Dr Hemphill is an outstanding cardiologist. He is caring and very competent.

Did Well

Needs Improvement

Gave an accurate diagnosis
Had a good bedside manner
Spent time with me
Provided follow-up after the visit
Flexible scheduling
Saw me in a timely manner
Staff was courteous

September 26th, 2024 | Source: Partner

.rating-and-reviews .noScriptHide .nojs-show,.truncated [data-rem],blockquote .truncated-text{ display: initial !important}.no-js-hide,.ellipsis { display: none; }.truncated:after {content: '' !important}

It doesn't get any better.

Did Well

Needs Improvement

Gave an accurate diagnosis
Had a good bedside manner
Spent time with me
Provided follow-up after the visit
Flexible scheduling
Saw me in a timely manner
Staff was courteous

September 24th, 2024 | Source: Partner

Vitals Preferred Provider
- - 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

Cardiology - Dignity Health Medical Group - Grass Valley, CA

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

Tel: (530) 477-8358

Mercy Medical Plaza - Sacramento, CA (North Lobby)

3941 J StSacramento, CA 95819

Tel: (916) 736-2323

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

Tel: (916) 453-2640

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 Medical Group - Folsom, CA (Creekside)

1561 Creekside DrFolsom, CA 95630

Tel: (916) 351-4825

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

6555 Coyle AveCarmichael, CA 95608

Tel: (916) 536-3500

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


Jonathan A. Hemphill, MD	Dr. Raghav Sharma, MD	Dr. Robert Paul Zucker, MD	Roshni V. Khatiwala, MD
Cardiovascular Disease	Cardiovascular Disease	Cardiovascular Disease	Cardiovascular Disease
Accepts New Patients	Accepts New Patients		Accepts New Patients
5 (40 Ratings)	5 (2 Ratings)	5 (1 Rating)	5 (3 Ratings)
	16 Years of Experience	45 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, Spanish	Speaks English, Gujarati, Hindi
Grass Valley , CA	Winter Park , FL	Grass Valley , CA	Grass Valley , CA
Med School: St. George University	Med School: New York Medical College	Med School: University Of Nebraska College Of Medicine	Med School: Medical school: Albany Medical College Internship: University of California, Davis Residency: University of California, Davis Fellowship: University of California, Davis (Education/Training)
Current Profile	View Profile	View Profile	View Profile

Search for your insurance and plan

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

Jonathan A. Hemphill holds an expired medical license in the state of California. They are board certified in Internal medicine by the American Board of Internal Medicine.

Board Certifications

Board certified in Internal medicine by the American Board of Internal Medicine.

Medical License

Medical Doctor with an expired medical license in the state of California that expired in 2025.

Education & Training

Residency

Completed their residency at University of New Mexico.

Medical School

Graduated from St. George University.

NPI Number

Jonathan A. Hemphill's NPI number is 1952405326.

Dr. James Peoples Drennan, MD
Internal Medicine
46 Years Exp | Sacramento, CA
(0)
Dr. David Bennett Wampold, MD
Cardiovascular Disease
55 Years Exp | Roseville, CA
(7)
Dr. Shaila Garg, MD
Cardiovascular Disease
36 Years Exp | Auburn, CA
(1)
Dr. Nicholas John Capos Jr, MD
Cardiovascular Disease
49 Years Exp | Grass Valley, CA
(12)
Dr. George J Broder, MD
Cardiovascular Disease
| Penn Valley, CA
(8)
Dr. Neil Allen Nedley
Internal Medicine
40 Years Exp | Auburn, CA
(8)
Dr. Naveen Srampical Manohar, MD
Cardiovascular Disease
33 Years Exp | Sacramento, CA
(11)
Dr. Anabel Isabel Facemire, MD
Cardiovascular Disease
33 Years Exp | Grass Valley, CA
(5)
Dr. Babak Sanei Fard, MD
Interventional Cardiology
27 Years Exp | Marysville, CA
(8)
Dr. Peter Robert Callaham, MD
Cardiovascular Disease
44 Years Exp | Grass Valley, CA
(11)

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

Our provider data is gathered directly from physicians and publicly available databases. Providers who verify their profiles gain the ability to update information, offering additional details about their specialties,education, treated conditions, performed procedures, and accepted insurances.

Reviews on Vitals are submitted by users only. Recognizing the valuable insights these reviews offer into a doctor's reputation, we maintain internal policies and protocols to ensure the quality and accuracy of all reviews. Importantly, providers cannot delete or alter reviews independently. Reviews can only be deleted or changed following an internal assessment by our customer service team.

Your feedback is highly valued and we encourage you to contact our support team should you encounter any issues.

Copyright © 2026 Vitals Consumer Services, LLC. US Patent No. 8, 694, 441. All Rights Reserved.
As more fully set forth in this website's terms of use . (1) nothing contained on or offered by or through this website should be construed as medical advice and should not be relied upon for medical diagnosis or treatment. Vitals Consumer Services, LLC ("Vitals"). the provider of this website, does not recommend or endorse any particular healthcare provider whose information or ratings appear on this website; and (2) Vitals has granted you a limited license to access and use this website for your own noncommercial use. You are not permitted to copy, reproduce, distribute, transmit, mirror, frame, scrape, extract, wrap, create derivative works of, reverse engineer, decompile or disassemble any part or aspect of this website.