Cardiology & Cardiovascular Services at St. Joseph Health Medical Group

Whatever level of care is needed — education, prevention, diagnosis or cutting-edge treatment and rehabilitation — we’re experts in your heart’s good health. We use today’s state-of-the-art testing methods to identify heart conditions and are committed to offering exceptional evidence-based medicine by bringing the newest research to our patients. Our partnerships with Santa Rosa Memorial Hospital, Queen of the Valley Medical Center in Napa and St. Joseph Hospital, Eureka ensure we offer the entire spectrum of services across the region -- from wellness programs to interventional cardiology that allow the newest, lifesaving procedures.

Procedures Performed

Advanced heart failure & arrhythmia management


Catheterization & angiography

The “gold standard” in evaluating for blocked arteries. A small,flexible tube helps X-rays to “look for” blocked arteries and can help measure pressures in the heart and blood vessels.

Coronary angiogram

Coronary stenting

Critical care

CT angiography


Ultrasound identifies problems of the heart valves and muscle function. Our digital system at St. Joseph Hospital provides higher-resolution images and faster diagnosis.



Heart attack & heart disease prevention

Internal cardiac defibrillators

Intravascualr ultrasound

Lifestyle, nutrition & exercise counseling

Noninvasive vascular testing

We use ultrasound to check for blocked arteries in other parts of the body. Heart monitoring - Portable monitoring to look for signs of irregular heart rhythms.

Nuclear Cardiology

Pacemaker Checks

Permanent pacemaker implantation

Proactive care for obesity, high cholesterol & hypertension

Stress testing, including nuclear

A noninvasive way to look for blocked arteries by stressing your heart with exercise or medications. Nuclear testing produces images of the heart’s structure and blood flow under stress.

Treadmill Stress Tests

Conditions Treated

Aortic Aneurysm

Arteriosclerosis Obliterans

Carotid Artery Disease

Chronic Venous Insufficiency


Deep Vein Thrombosis (DVT)

Deep Venous Thrombosis


Diabetic Foot




Peripheral Arterial Disease (PAD)

Peripheral arterial disease (PAD)

Spider Veins

Superficial Thrombophlebitis

Thromboangiitis Obliterans

Varicose Veins


Vasospastic Diseases

Venous Insufficiency

Our Providers

Our Provider

Sergio M. Manubens, MD
Sergio M. Manubens, MD
Cardiology, Interventional Cardiology, Vascular Medicine
City:  Napa
4.9 out of 5

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Our Providers

Humboldt Providers

Our Humboldt Provider

Tin Botzler, MD
Tin Botzler, MD
City:  Eureka
4.4 out of 5

Sonoma and Napa Providers

Our Sonoma and Napa Provider

Sergio M. Manubens, MD
Sergio M. Manubens, MD
Cardiology, Interventional Cardiology, Vascular Medicine
City:  Napa
4.9 out of 5

Our Locations

Eureka -  Cardiology

Eureka - Cardiology

2773 Harris St.
Suite A
Eureka, CA 95503
Eureka - Cardiology Diagnostic Center

Eureka - Cardiology Diagnostic Center

2332 23rd St.

Eureka, CA 95501
Lakeport - Medical Oncology

Lakeport - Medical Oncology

5150 Hill Rd. E.
Suite F
Lakeport, CA 95453

Mon - Fri: 8:30 a.m. - 5 p.m.

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Napa - Cardiology

Napa - Cardiology

3443 Villa Lane
Suite 2
Napa, CA 94558
Petaluma - Cardiology

Petaluma - Cardiology

108 Lynch Creek Way
Suite 2
Petaluma, CA 94954
Ukiah - Cardiology

Ukiah - Cardiology

240 Hospital Dr.
Suite B
Ukiah, CA 95482