Bass Medical Group

What Bass Medical Group does

Bass Medical Group is a private, for-profit multi-specialty physician network headquartered in Walnut Creek, California, operating over 200 clinical locations throughout the San Francisco Bay Area and broader Northern California. The group functions as a network of independently practicing physicians that delivers care across more than 30 medical specialties, anchored by dedicated specialty centers: the Gregory Rhodes MD Cancer Center (radiation therapy featuring MRIdian MR-guided linear accelerator, Elekta VersaHD CT-guided LINAC, and AlignRT surface-guided radiation therapy), the BASS Imaging Center (wide-bore MRI and PET/CT diagnostics), and the Breast Health Center (breast conservation surgery, nipple-sparing mastectomy, and comprehensive breast care). Additional specialty practices include Diablo Neurology, GI Group for gastroenterology, and integrated thoracic surgery services.

The underlying platform combines employed and affiliated physicians with hospital affiliations at John Muir Health (Walnut Creek and Concord), Sutter Delta Medical Center, Alta Bates Summit, Eden Medical Center, and San Ramon Regional Medical Center, enabling both outpatient and inpatient care delivery across a Northern California service area spanning at least Chico, Redding, Hollister, Walnut Creek, Danville, Concord, and Antioch. The organization invests in capital-intensive medical technology unavailable in many community settings, positioning precision oncology and advanced imaging as primary differentiators.

Revenue is generated through fee-for-service billing to patients covered by the group's contracted insurance network — UnitedHealthcare, Anthem Blue Cross, Cigna, Health Net, TRICARE, Blue Shield of California, and Medicare — with patient acquisition handled primarily through a direct-to-consumer website, online appointment requests, and community engagement. The company is HIPAA-compliant and operates as an independent network without a disclosed parent company, venture capital backing, or public listing, with CEO Inez Wondeh leading the organization.

Name

Bass Medical Group

Legal name

BASS Medical Group

Website

https://bassmedicalgroup.com

Company type

Private

Founded year

2006

Operating status

Operating

Headcount range

1,001–5,000 employees

Short description

Bass Medical Group is a private, for-profit multi-specialty physician network operating over 200 locations across the San Francisco Bay Area and Northern California. It serves individual patients through primary care, 30+ specialties, advanced imaging, and oncology services anchored by the Gregory Rhodes MD Cancer Center, BASS Imaging Center, and Breast Health Center, billed via fee-for-service across major commercial and Medicare insurance networks.

Ownership category

akta.pro rank

Product category

Multi-Specialty Medical Group Practice

NAICS

Offices of Physicians (except Mental Health Specialists) (621111), Offices of Physicians (62111), Diagnostic Imaging Centers (621512)

SIC

Services-Offices & Clinics Of Doctors Of Medicine (8011), Services-Health Services (8000), Services-Specialty Outpatient Facilities, Nec (8093)

akta.pro primary industry

Hospital-Owned Physician Networks & Medical Groups (HLAFAAAL)

akta.pro secondary industry

Hospital Shared Services, GPOs & System Support Organizations (HLAFAAAO)

Keywords

• Multi-specialty medical group
• Outpatient healthcare services
• Cancer treatment center
• Diagnostic imaging services
• Primary care physicians

Headquarters

HQ city

Walnut Creek

HQ country

United States

HQ region

North America

Offices6 records

Markets served

GTM type

B2C

Offering type

Services

Cost components

Personnel, Operations, Technology or R&D, Infrastructure, Marketing or Sales, Supply Chain

Revenue model

1. Medical Services Revenue: Fee-for-service healthcare delivery through primary care, specialty care, imaging, and cancer treatment services. Revenue generated through insurance billing and patient payments.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

BASS Medical Group operates a connected network of over 200 locations across the San Francisco Bay Area, employing hundreds of physicians across 30+ medical specialties. The group's core offering is fee-for-service outpatient healthcare delivery spanning primary care, specialty care (including gastroenterology, neurology, thoracic surgery, oncology, and more), advanced diagnostic imaging, and comprehensive cancer treatment through specialized centers such as the Gregory Rhodes MD Cancer Center, BASS Imaging Center, and Breast Health Center.

Product overview

BASS Medical Group is a multi-specialty medical group operating a network of over 200 locations throughout the San Francisco Bay Area. The organization operates as a platform of specialized centers and physician practices, including the Gregory Rhodes MD Cancer Center (offering radiation therapy with MRIdian, Elekta VersaHD, and AlignRT technologies), BASS Imaging Center (providing wide-bore MRI and PET/CT imaging), and Breast Health Center. The group also encompasses specialty practices such as Diablo Neurology and GI Group for gastroenterology services, along with primary care and numerous other medical specialties. Together, these integrated components provide patients with connected, comprehensive healthcare spanning prevention, diagnosis, treatment, and survivorship care.

Differentiator

Problem solved

Functional benefit

Products and services

• Gregory Rhodes MD Cancer Center

Quantifiable outcome

• Advanced imaging technology including MRIdian for precise radiation treatment targeting
• +1 more outcomes

Named customers2 records

Segments2 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

14 partnerships are on record, tiered minor and core.

• UnitedHealthcareminorOthersMajor commercial insurance carrier contracted with BASS Medical Group for provider network participation. Patients with UnitedHealthcare coverage can access BASS providers within their network.
• Anthem Blue CrossminorOthersMajor commercial insurance carrier contracted with BASS Medical Group for provider network participation.
• CignaminorOthersMajor commercial insurance carrier contracted with BASS Medical Group for provider network participation.
• Health NetminorOthersMajor commercial insurance carrier contracted with BASS Medical Group for provider network participation.
• TRICAREminorOthersMilitary health insurance program contracted with BASS Medical Group for provider network participation.
• Blue Shield of CaliforniaminorOthersMajor California commercial insurance carrier contracted with BASS Medical Group for provider network participation.
• MedicareminorOthersFederal health insurance program that BASS Medical Group participates in for eligible patients.
• John Muir HealthcoreStrategic or Co-development PartnerDr. Kai Lee has hospital affiliations with John Muir Health Walnut Creek Medical Center and John Muir Health Concord Medical Center for inpatient care. BASS physicians utilize John Muir Health hospitals for procedures and patient care.
• John Muir Health Concord Medical CentercoreStrategic or Co-development PartnerDr. Asha Gupta provides inpatient and outpatient care at John Muir Medical Center-Concord where BASS physicians perform procedures and treat patients.
• Sutter Delta Medical CentercoreStrategic or Co-development PartnerDr. Asha Gupta provides inpatient and outpatient care at Sutter Delta Medical Center in Antioch.
• John Muir HealthcoreStrategic or Co-development PartnerDr. Wilson Tsai is Director of the Thoracic Surgical Program at John Muir Health. John Muir Medical Center in Walnut Creek has a dedicated thoracic wing with specially trained staff.
• Alta Bates Summit Medical CenterminorStrategic or Co-development PartnerDr. Wilson Tsai has hospital affiliations at Alta Bates Summit Medical Center campuses for thoracic surgery procedures.
• Eden Medical CenterminorStrategic or Co-development PartnerDr. Wilson Tsai serves as Chair of the Thoracic Division at Sutter Eden Medical Center in Castro Valley where he has established a comprehensive thoracic program.
• San Ramon Regional Medical CenterminorStrategic or Co-development PartnerDr. Wilson Tsai has hospital affiliations with San Ramon Regional Medical Center for thoracic surgery procedures.

Scale indicators2 records

Recent moves6 records

Expansion highlights5 records

Broad incumbents

• John Muir Health: Major Contra Costa County health system where BASS physicians hold program-leadership and admitting privileges; comparable multi-specialty physician network serving the same East Bay geography.
• Sutter Health: Large integrated Northern California health system with a Palo Alto Medical Foundation multi-specialty physician network directly overlapping BASS's Bay Area primary care and specialty footprint.
• UCSF Health: Academic medical center in San Francisco with multi-specialty faculty practices and a comprehensive cancer center competing with BASS for tertiary referrals and physician talent in the Bay Area.
• The Permanente Medical Group: Permanente Medical Group is Kaiser Permanente's Northern California multi-specialty physician group — a massive, fully integrated, capitated network that competes directly with BASS for Bay Area patients and physicians.
• Stanford Health Care: Bay Area academic health system with multi-specialty physician network and advanced cancer and imaging services competing for the same high-acuity patients BASS serves at its Cancer Center.

Emerging players

• Carbon Health: Multi-state primary and urgent care platform with a tech-enabled, consumer-first model; competes with BASS for Bay Area primary care patients and is exploring specialty expansion.
• One Medical (Amazon): Membership-based primary care platform acquired by Amazon with a sizable Bay Area presence; competes with BASS for primary care volume and is extending into virtual and specialty care.

Regional players

• Dignity Health (CommonSpirit): Large multi-state Catholic health system with hospitals and affiliated medical groups in Northern California (including Sequoia, Dominican, Mercy), competing for the same patient population as BASS.

Direct peers

• Hill Physicians Medical Group: Large independent physician association (IPA) in Northern California with multi-specialty practices and risk-bearing contracts — a direct structural peer to BASS's physician network model.
• PAMF (Palo Alto Medical Foundation): Multi-specialty physician group affiliated with Sutter Health serving the San Francisco Bay Area peninsula — directly comparable in specialty breadth, patient mix, and coordinated-care model to BASS.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

• Xx.com/BASSmedgroup

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Bass Medical Group