Dr. Walt Marquardt, MD

Interventional Cardiology •  Male • Age 65
  
Dr. Marquardt
Accepting new patients
Telehealth services available

Mercy Medical Group

150 Catherine Ln Grass Valley, CA 95945

Make an Appointment

(530) 477-8358

Dr. Walt Marquardt, MD is a Interventional Cardiology Specialist in Grass Valley, CA and has over 39 years of experience in the medical field. Dr. Marquardt has more experience with Interventional Cardiology, Adult Congenital Cardiac Disorders, and Cardiac Care than other specialists in his area. He graduated from University of Pittsburgh School of Medicine medical school in 1981. He is affiliated with medical facilities Mercy General Hospital and Sierra Nevada Memorial Hospital. He is accepting new patients and has indicated that he accepts telehealth appointments. Be sure to call ahead with Dr. Marquardt to book an appointment.


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At a Glance

  • Explains Conditions Well
    Patients said this doctor explains conditions well. See reviews
  • Offers Telehealth
    This provider offers telehealth appointments. Call the office to schedule an appointment.
  • Practices at Top Hospital
    America’s 50 Best Hospitals for Cardiac Surgery Award™ See hospitals

Insurance Check

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Dr. Marquardt accepts

Accepted insurance can change. Please double-check when making an appointment.

(530) 477-8358

Dr. Marquardt accepts the following insurance:

Aetna
Aetna HMO
Choice Plus POS II
Anthem
Access for Infants & Mothers (AIM)-CA HMO
Advantage-CA HMO
Advantage-CA PPO
Balanced (Prudent Buyer)-CA PPO
Blue Cross (CACare) - Individual-CA HMO
Blue Cross (CACare) - Large Group-CA HMO
Blue Cross (CACare) - Small Group-CA HMO
Blue Cross (Prudent Buyer) - Individual-CA PPO
Blue Cross (Prudent Buyer) - Large Group-CA PPO
Blue Cross (Prudent Buyer) - Small Group-CA PPO
Blue Cross (Prudent Buyer) - Student Health-CA PPO
Blue Cross-CA HMO-POS
Bronze (Prudent Buyer PPO/ Small Grp)-CA PPO
Bronze EPO (Prudent Buyer / Small Grp)-CA PPO
Bronze EPO (Prudent Buyer EPO/ Small Grp)-CA
Bronze w/ H.S.A (Prudent Buyer PPO/Small Grp)-CA PPO
Dignity Health Custom Advantage-CA HMO
Dignity Health EPO / PPO-CA
Dignity Health PHC EPO & HDP/HSA-CA
Dignity Health Ventura EPO/PPO-CA
EPO-CA
Gold (CaliforniaCare HMO/ Small Grp) HMO
Gold (Prudent Buyer PPO/ Small Grp)-CA PPO
Gold Advantage-CA PPO
Gold EPO (Prudent Buyer / Small Grp)-CA PPO
Gold EPO (Prudent Buyer EPO/ Small Grp)-CA
Gold Select (Select / Small Grp)-CA HMO
Lumenos Plans-CA PPO
Major Risk Medical Insurance Program (MRMIP) - Prudent Buyer-CA PPO
MemorialCare Custom-CA PPO
National (BlueCard Basic) PPO
National (BlueCard) PPO
PERS Choice / PERSCare Providers-CA PPO
PERS Select-CA HMO
PERS Traditional-CA HMO
Platinum (CaliforniaCare HMO/ Small Grp) HMO
Platinum (Prudent Buyer PPO/ Small Grp)-CA PPO
Platinum Select (Select / Small Grp)-CA HMO
Select Plus-CA HMO
Select-CA HMO
Silver (CaliforniaCare HMO/ Small Grp) HMO
Silver (Prudent Buyer PPO/ Small Grp)-CA PPO
Silver Advantage-CA PPO
Silver EPO (Prudent Buyer EPO/ Small Grp)-CA
Silver EPO w/ H.S.A (Prudent Buyer/Small Grp)-CA PPO
Silver Select (Select / Small Grp)-CA HMO
Silver w/ H.S.A (Prudent Buyer PPO/Small Grp)-CA PPO
Tenet Network-CA PPO
Traditional
Traditional PPO
UC Care-CA PPO
UC CORE-CA PPO
UC Health Savings Plan-CA
UC High Option Supplement to Medicare-CA
UC Medicare with Prescription Drugs-CA PPO
UC Medicare without Prescription Drugs-CA PPO
UC Resident and Fellows-CA PPO
UCSHIP-CA PPO
USC Plan (Two Tiered Network)-CA HMO
Anthem Blue Cross
Blue Cross Blue Shield
Blue Card PPO
Blue Cross Blue Shield of California
Advantage Preferred DirectAccess Plus PPO
Blue Cross Blue Shield of California PPO
Select Plus HMO
Blue Shield of California
CareFirst Blue Cross Blue Shield
HealthyBlue 2.0
HealthyBlue Advantage
ChoiceCare Network
Cigna
Cigna HMO
Cigna PPO
Open Access Plus
Coventry Health Care
First Health (Coventry Health Care)
First Health (Coventry Health Care) PPO
Health Net
HealthSmart - Interplan Health Group
Interplan Health Group
MultiPlan
MultiPlan PPO
PHCS Network PPO
Networks By Design
Pacific Foundation for Medical Care
Tricare
UnitedHealthCare
United Healthcare
Western Health Advantage

Background Check

No malpractice claims found for California
No disciplinary actions found for the years we collect data
No board actions found for the years we collect data
Learn more about background checks

Practice Areas

Interventional Cardiology

Interventional cardiologists specialize in catheter-based treatment of heart diseases through procedures such as cardiac catheterization, impella devices, and stent placement.Compare with other Interventional Cardiology specialists.

Typically treats 90% more than similar doctors

Based on claims data for 3 conditions and procedures

TreatmentsTreatment Frequency
Cardiac Catheterization (incl. Coronary Angiography)
very high
very high

Treatment Frequency

Dr. Marquardt performs Cardiac Catheterization (incl. Coronary Angiography) more than 100% of their peers

Dr. Marquardt performs this procedure more than 100% of their peers

Peripheral Artery Catheterization
very high
very high

Treatment Frequency

Dr. Marquardt performs Peripheral Artery Catheterization more than 96% of their peers

Dr. Marquardt performs this procedure more than 96% of their peers

Coronary Angioplasty, Atherectomy and Stent
normal
normal

Treatment Frequency

Dr. Marquardt performs Coronary Angioplasty, Atherectomy and Stent more than 74% of their peers

Dr. Marquardt performs this procedure more than 74% of their peers

Adult Congenital Cardiac Disorders

Adult congenital cardiac disorder specialists diagnose and treat heart disorders, such as arrythmias and mitral valve disease, that have been present from birth to adulthood.Compare with other Adult Congenital Cardiac Disorders specialists.

Typically treats 70% more than similar doctors

Based on claims data for 9 conditions and procedures

TreatmentsTreatment Frequency
Aortic Valve Regurgitation
high
high

Treatment Frequency

Dr. Marquardt treats Aortic Valve Regurgitation more than 87% of their peers

Dr. Marquardt treats this condition more than 87% of their peers

Congenital Heart Disease
normal
normal

Treatment Frequency

Dr. Marquardt treats Congenital Heart Disease more than 81% of their peers

Dr. Marquardt treats this condition more than 81% of their peers

Mitral Valve Disease
normal
normal

Treatment Frequency

Dr. Marquardt treats Mitral Valve Disease more than 79% of their peers

Dr. Marquardt treats this condition more than 79% of their peers

Cardiac Care

Cardiac care specialists diagnose and treat general cardiac conditions such as high blood pressure, angina, and arrhythmias through procedures including cardiovascular stress tests, ablation therapy, and heart valve surgery.Compare with other Cardiac Care specialists.

Typically treats 74% more than similar doctors

Based on claims data for 21 conditions and procedures

TreatmentsTreatment Frequency
Heart Attack (Acute Myocardial Infarction)
very high
very high

Treatment Frequency

Dr. Marquardt treats Heart Attack (Acute Myocardial Infarction) more than 100% of their peers

Dr. Marquardt treats this condition more than 100% of their peers

Coronary Artery Disease (CAD)
very high
very high

Treatment Frequency

Dr. Marquardt treats Coronary Artery Disease (CAD) more than 99% of their peers

Dr. Marquardt treats this condition more than 99% of their peers

Heart Disease
very high
very high

Treatment Frequency

Dr. Marquardt treats Heart Disease more than 97% of their peers

Dr. Marquardt treats this condition more than 97% of their peers

Hide other practice areas

Check Dr. Marquardt's experience treating your condition or procedure

Dr. Marquardt's conditions and procedures:

  • Ablation for Treatment of Cardiac Arrhythmias
  • Aneurysm
  • Aneurysm of Heart
  • Angina and Acute Coronary Syndrome
  • Aortic Aneurysm
  • Aortic Dissection
  • Aortic Ectasia
  • Aortic Embolism and Thrombosis
  • Aortic Stenosis
  • Aortic Valve Disease
  • Aortic Valve Regurgitation
  • Aortic Valve Surgery
  • Arrhythmias
  • Atrial Fibrillation
  • Atrial Flutter
  • Automatic Implantable Cardioverter Defibrillator (ICD) Implantation
  • Autonomic Disorders
  • Benign Tumor
  • Cardiac Catheterization (incl. Coronary Angiography)
  • Cardiac Electrophysiology
  • Cardiac Imaging
  • Cardiac Myocardial Perfusion Imaging
  • Cardiac Procedure
  • Cardiomegaly
  • Cardiomyopathy
  • Cardiovascular Disease
  • Cardiovascular Intervention
  • Cardiovascular Stress Test
  • Cardioversion, Elective
  • Cardioverter-Defibrillator or Pacemaker Insertion, Removal or Repair
  • Carotid Artery Disease
  • Carotid Artery Stent Placement
  • Chest CT (incl. Heart and Lungs)
  • Chest Pain
  • Chronic Pulmonary Heart Diseases (incl. Pulmonary Hypertension)
  • Congenital Aortic Valve Disorders
  • Congenital Heart Defects
  • Congenital Heart Disease
  • Congestive Heart Failure
  • Coronary Angioplasty, Atherectomy and Stent
  • Coronary Artery Aneurysm
  • Coronary Artery Disease (CAD)
  • Coronary Artery Dissection
  • Coronary Interventional Procedures
  • Endocarditis
  • Heart Attack (Acute Myocardial Infarction)
  • Heart Disease
  • Heart Murmur
  • Heart Palpitations
  • Heart Tumors, Benign
  • Hyperlipidemia
  • Hypertension
  • Hypertensive Chronic Kidney Disease
  • Hypertensive Heart and Chronic Kidney Disease
  • Hypertensive Heart Disease
  • Hypotension
  • Impella Device
  • Insertion of Epicardial Lead for Pacemaker or Cardioverter and-or Defibrillator
  • Insertion of Left Ventricular Lead for Pacemaker or Cardioverter and-or Defibrillator
  • Limb Swelling
  • Limb Swelling Caused by Fluid Overload
  • Lipidoses (incl. Gaucher Disease)
  • Mitral Valve Disease
  • Mitral Valve Regurgitation
  • Mitral Valve Stenosis
  • Mitral Valve Surgery
  • Non-Coronary Angioplasty, Atherectomy, and Stenting
  • Pacemaker Insertion or Replacement
  • Pericardial Disease
  • Peripheral Artery Catheterization
  • Peripheral Vascular Intervention
  • Primary Pulmonary Hypertension
  • Pulmonary Disease
  • Pulmonary Edema
  • Pulmonary Hypertension
  • Pulmonary Valve Disease
  • Pulmonary Valve Surgery
  • Reflex Sympathetic Dystrophy
  • Removal or Revision of Pacemaker or Cardioverter and-or Defibrillator
  • Secondary Hypertension
  • Septal Defect
  • Syncope
  • Thoracentesis
  • Thrombolysis
  • Thrombosis
  • Tilt Testing or Cardiac Event Monitors
  • Transcatheter Aortic Valve Replacement (TAVR)
  • Tricuspid Valve Disease
  • Tricuspid Valve Surgery
  • Valve Repair or Replacement (Aortic, Mitral, Tricuspid, and Pulmonary)
  • Vascular Disease
  • Vascular Duplex Ultrasonography and Plethysmography
  • Vascular Surgical Procedure

Dr. Marquardt's Reviews

Likelihood to recommend Dr. Marquardt

4.8

Based on 23 ratings

5 Stars
91.30434782608695%
(21)
4 Stars
4.3478260869565215%
(1)
3 Stars
0%
(0)
2 Stars
0%
(0)
1 Star
4.3478260869565215%
(1)
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How likely are you to recommend
Dr. Marquardt?
(Select your rating)
RecentHighestLowestMost Helpful
Reply Flag
Best in the West
What went well
  • Appointment scheduling
  • Office environment
  • Staff friendliness
  • Wait times
  • Appointment wasn't rushed
  • Listened & answered questions
  • Explained conditions well
  • Trusted the provider's decisions
What could be improved
No results
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Craig Anderson – Aug 30, 2020
Craig, thank you for your feedback as we love to...Read More
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Reply Flag
Dr. Marquardt is the best. He takes time to explain everything and show interest in your needs. His support and care to my husband has been outstanding. We are so thankful to have him as our doctor….
What went well
  • Appointment scheduling
  • Office environment
  • Staff friendliness
  • Appointment wasn't rushed
  • Listened & answered questions
  • Explained conditions well
  • Trusted the provider's decisions
What could be improved
No results
Was this helpful?
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Rodney and Leona Bettencourt – Aug 05, 2019
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Reply Flag
Dr Marquardt is a phenomenal doctor. He's got knowledge, experience and heart. He is an exceptional cardiologist. Respected highly by his patients and staff. He saved my father's life and I trust him implicitly!!! I highly recommend him. No words can express my enormous gratitude and admiration for him.
What went well
No results
What could be improved
No results
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Sacramento, CA – Apr 12, 2019
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Reply Flag
Dr Marquardt is a phenomenal surgeon and has great bedside manner. My husband had a heart attack and he placed a stent, provided all after care and was his doctor for 2 years following until our insurance coverage changed. He spends a long time with patients, explains things thoroughly and in terms that are understandable to the layman. Dr Marquardt is the only surgeon I would choose for a life threatening heart procedure.
What went well
No results
What could be improved
No results
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Lisa G in Sacramento – Apr 10, 2019
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Reply Flag
A great Doctor, also friendly and communicative. After my heart attack of last December, and a Code 3 Ambulance ride from Grass Valley to Mercy General, he put in 3 stents. I am doing great. He is highly respected by the Hospital staff people. Also, Sierra Nevada Memorial Hospital and Mercy General are excellent! (I have had 5 surgeries at these hospitals)
What went well
  • Appointment scheduling
  • Office environment
  • Staff friendliness
  • Appointment wasn't rushed
  • Listened & answered questions
  • Explained conditions well
  • Trusted the provider's decisions
What could be improved
No results
Was this helpful?
thumbs up icon option2
thumbs down icon option
Bob Zuelsdorf in Grass Valley , CA – Aug 14, 2018
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Reply Flag
Dr. Marquardt has providing care for my Grandmother, father and mother, myself and now my mother-in-law. He has been thoughtful, caring and the entire family has total confidence in his diagnoses and treatment recommendations. We are very lucky to have a man of his quality and integrity in our area.
What went well
No results
What could be improved
No results
Was this helpful?
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Rocklin, CA – Oct 31, 2016
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About Me

Care Philosophy

I believe in treating my patients with dignity and respect and providing care tailored to the indivdual needs of the patient.

Specialties

  • Interventional Cardiology
  • Cardiology

Board Certifications

Education

1988
San Francisco Hrt Inst-Seton Med Ctr
Fellowship Hospital
1987
Hosp Of U Hlth Ctr-U Pittsburgh
Fellowship Hospital
1984
Hosp Of U Hlth Ctr-U Pittsburgh
Residency Hospital
1982
Hosp Of U Hlth Ctr-U Pittsburgh
Internship Hospital
1981
University of Pittsburgh School of Medicine
Medical School

Awards

Frequently Asked Questions

Does Dr. Walt Marquardt, MD offer telehealth services?

Is Dr. Walt Marquardt, MD accepting new patients?

Does Dr. Walt Marquardt, MD accept my insurance?

Locations

Mercy Medical Group

Grass Valley - Catherine Ln.150 Catherine Ln Grass Valley, CA 95945
1
Mercy Medical Plaza - Cardiology3941 J St Sacramento, CA 95819
2

Affiliated Hospitals

Check the quality of care at hospitals where Dr. Marquardt treats patients.

Learn more

Mercy General Hospital

Sacramento, CA

77% Patient experience rating, 8% higher than the national average

  • America’s 50 Best Hospitals for Cardiac Surgery Award™ (2021)

Sierra Nevada Memorial Hospital

Grass Valley, CA

65% Patient experience rating, 4% lower than the national average

  • Patient Safety Excellence Award™ (2018)
;