HMO vs PPO: Which Group Health Plan Is Right for Your Business?
The HMO vs PPO choice is the most consequential plan design decision California employers make. HMOs (Health Maintenance Organizations) require employees to choose a primary care physician (PCP) who coordinates all care and provides referrals to specialists. PPOs (Preferred Provider Organizations) allow employees to see any in-network provider directly without a referral. The tradeoff: HMOs cost 20–35% less in monthly premiums; PPOs offer far more flexibility and a much larger provider network.
Cost Comparison
For a California employer with 15 employees in 2026, a Kaiser HMO might run $530–$620/employee/month while an Anthem PPO runs $720–$890/employee/month — a difference of $28,000–$50,000 annually in employer premiums. That cost gap is why HMOs dominate small-group enrollment in California: 58% of CA small-group enrollees are in HMO or HMO-equivalent products. The premium savings are real and significant, especially for employers contributing 75–100% of employee-only premiums.
Network: The Critical Difference
HMO networks are geographically defined — employees must receive care from providers within a specific medical group or IPA (Independent Physician Association). Out-of-network care is not covered except in emergencies. PPO networks are much larger (Anthem PPO includes 57,000+ CA providers vs. ~25,000 in a typical HMO) and allow out-of-network care at higher cost-sharing. For employees with established specialist relationships, the PPO's flexibility to keep their doctors is often worth the higher premium.
Which to Choose
Choose HMO if: workforce is primarily local, cost savings are a priority, employees are generally healthy young adults, or you're offering Kaiser (where HMO quality is excellent). Choose PPO if: employees are spread across multiple cities or regions, workforce includes older employees managing chronic conditions, employees strongly value provider choice, or you want to attract senior talent who expect PPO flexibility.