The census
1188 independent groups — where they are
188
independent provider organizations (after excluding system-owned)
98 / 90
San Bernardino county / Riverside county split
42 + 42
densest pockets: Central SB & the Redlands corridor
~40
flagged "verify ownership before aligning" (MSO/PE/minority-stake)
Best aggregation targets for an RCH CIN (in/near the Redlands corridor)
CAMG (purpose-built 2024 independent PC — most aligned) · RYMG (multispecialty, just left Optum) · Maren MG (new independent PC) · Arrowhead Orthopaedics (27+ surgeons, top specialty/co-management target) · Physician Health Network (PHN) IPA (San Bernardino — ~600 providers, ~54k lives, cleanest large physician-owned IPA) · Rancho Paseo MG (the San Gorgonio Pass flagship) · plus the RCH-campus specialty bench (independent cardiology, GI/endoscopy, on-campus Icon OB/GYN, oncology, urology, neurosurgery).
~40 carry ownership nuance — verify before outreach
Retained as independent (not system-owned) but flagged: LaSalle (Astrana ~25% minority), Riverside Medical Clinic (UHS MSO), Rancho Family / TriValley (PE-backed), Chaparral (Akido MSO), Altais–Riverside (enablement model), Desert Oasis (Heritage subsidiary), and several CVMG/ProHealth groups that appear on Optum's contracted (not owned) network. Look for the amber "verify" badge in the table.
Browse all 188
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| Group | Type | City | County | Region | Specialties | Providers (est) | Affiliation / note |
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Loading 188 groups…
Counts are estimates (NPPES NPI density + site counts + group self-description); network-IPA figures are network-wide, not RCH-corridor-attributable. Sources: CMS NPPES, CA DMHC RBO list, IEHP directories, group websites. Full narrative: the IE Independent-Provider Census on the Downloads page.
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