Our Services

Medical Oncology

St. Joseph Health Medical Group offers comprehensive medical oncology services to treat cancer using chemotherapy, hormonal therapy, immunotherapy, and targeted therapy at our outpatient clinics in Santa Rosa, Petaluma, Napa, Lakeport, and Eureka. As leaders and innovators, our medical oncologists provide you and your family with state-of-the-art treatment options that take advantage of advanced techniques in medical oncology available to treat cancer. We also have a robust clinical research program, including participation in national clinical trials that are available to patients with certain conditions. If you would like more information click here.

Our medical oncologists are board-certified, completing their residency in internal medicine and medical oncology at the finest medical institutions from around the United States. Some are also board-certified hematologists, with additional training in the treatment of benign blood disorders, such as hemophilia. By virtue of their broad training in all aspects of adult medicine, they are uniquely qualified to coordinate the complex care of patients requiring all types of cancer treatment, including radiation therapy or surgery if appropriate.

Whatever type or combination of therapy you might need, you will be cared for by a team of medical professionals dedicated to ensuring that you receive the best possible results from treatment.

For more information on what we are doing to advance the care in our community, please visit the following pages for our services in

Sonoma Napa Humboldt

View Our Locations

Medical Oncology

Medical Oncology and Radiation Oncology

Medical Oncology

  • 1100 Trancas St.
    Napa, CA 94558

Medical Oncology

Meet Our Providers

Ian Anderson MD (707) 528-1050
Oncology - Medical

Mon - Fri

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Office :
St. Joseph Health Medical Group
3555 Round Barn Cir.
Santa Rosa, CA 95403
Ellen Boersma NP (707) 262-3060
Oncology - Medical

Mon - Fri

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Office :
St. Joseph Health Medical Group
5150 Hill Rd. E.
Suite F
Lakeport, CA 95453
Frederick C. David MD (707) 763-0600
Radiation Oncology

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

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Office 1:
St. Joseph Health Medical Group
110 Lynch Creek Way
Suite A
Petaluma, CA 94954

Office 2:
16677 Yorba Linda Blvd.
Santa Rosa, CA 95403
Paul J. Dugan MD (707) 253-7161
Oncology - Medical (Board Certified)

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

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Office :
St. Joseph Health Medical Group
1100 Trancas St.
Suite 256
Napa, CA 94558
Ralph B. Hanahan MD (707) 763-0600
Radiation Oncology

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

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Office :
St. Joseph Health Medical Group
110 Lynch Creek Way
Suite A
Petaluma, CA 94954
Jarrod Holmes MD (707) 528-1050
Oncology - Medical

Mon - Fri

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Office :
St. Joseph Health Medical Group
3555 Round Barn Cir.
Santa Rosa, CA 95403
Office 1:
St. Joseph Health Medical Group
101 Rowland Way
Novato, CA 94949

Office 2:
Mission Viejo Campus
26726 Crown Valley Pkwy.
Suite 220
Santa Rosa, CA 95403
Wayne Keiser MD (707) 528-1050
Oncology - Medical

Mon - Fri

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Office :
St. Joseph Health Medical Group
3555 Round Barn Cir.
Santa Rosa, CA 95403
Wes Lee MD (707) 528-1050
Oncology - Medical

Mon - Fri

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Office :
St. Joseph Health Medical Group
3555 Round Barn Cir.
Santa Rosa, CA 95403
Office :
110 Lynch Creek Way
Suite A
Petaluma, CA 94954
Daniel P. Mirda MD (707) 253-7161
Oncology - Medical (Board Certified)

Mon - Fri: 9 a.m. - 5 p.m.

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Office :
St. Joseph Health Medical Group
1100 Trancas St.
Suite 256
Napa, CA 94558
Office 1:
St. Joseph Health Medical Group
110 Lynch Creek Way
Suite A
Petaluma, CA 94954

Office 2:
1201 W. La Veta Ave.
Santa Rosa, CA 95403
Elie M. Richa MD, MBA (707) 267-2060
Hematology-Oncology

Mon - Fri

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Office :
St. Joseph Health Medical Group
2710 Dolbeer St.
Eureka, CA 95501
Cindy O. Scharfen MD (707) 763-0600
Radiation Oncology (Board Certified)

Mon 9 a.m. - 5 p.m., Tue, Wed, Thu, Fri, Sat, Sun

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Office :
St. Joseph Health Medical Group
110 Lynch Creek Way
Suite A
Petaluma, CA 94954
Office :
St. Joseph Health Medical Group
110 Lynch Creek Way
Suite A
Petaluma, CA 94954
Mark Turrill MD (707) 262-3060
Oncology - Medical

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

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Office :
St. Joseph Health Medical Group
5150 Hill Rd. E.
Suite F
Lakeport, CA 95453
Ari Umutyan MD (707) 253-7161
Oncology - Medical (Board Certified)

Mon 9 a.m. - 5 p.m., Tue 9 a.m. - 5 p.m., Thu 9 a.m. - 5 p.m., Fri 9 a.m. - 12 p.m.

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Office :
St. Joseph Health Medical Group
1100 Trancas St.
Suite 256
Napa, CA 94558