2.2 Commercial plans (HMO, PPO, EPO, indemnity)

Commercial (private) insurance is coverage that is not provided by a government program—typically employer-sponsored group plans or individual policies purchased on the marketplace. Most modern commercial coverage is delivered through managed care, a system that controls cost and quality by contracting with a defined network of providers and coordinating how members access care. The CBCS must know each plan model's network and referral rules because those rules determine whether a claim will be paid, denied, or reduced.

Core Managed-Care Concepts

Two concepts appear across every model:

• Network: the group of providers and facilities that have contracted with the plan to accept negotiated (allowed) rates. In-network providers cost the patient less; out-of-network providers cost more or may not be covered at all.
• Referral vs. authorization: a referral is a PCP's recommendation to see a specialist, while an authorization is the payer's approval of a specific service. Some plans require one, both, or neither.

A premium is the fixed monthly amount paid (often by the employer and employee together) to keep coverage active; it is separate from the copay, deductible, and coinsurance owed at the time of care. Most commercial coverage is obtained through an employer during open enrollment, though individuals can also buy marketplace or private plans. Whatever the source, the CBCS's job is to translate the plan's rules into correct billing.

Health Maintenance Organization (HMO)

An HMO offers the lowest premiums and copays in exchange for the tightest access rules. Each member selects a primary care physician (PCP) who acts as a gatekeeper: the member must see the PCP first, and the PCP must issue a referral before the member can see a specialist. HMOs generally cover in-network care only—out-of-network services are not paid except for a true emergency. HMOs often reimburse contracted providers through capitation, a fixed per-member-per-month payment. The trade-off is clear: low cost but limited choice and more administrative steps.

Preferred Provider Organization (PPO)

A PPO offers the most flexibility. Members do not need to choose a PCP and do not need referrals to see specialists. The plan covers both in-network and out-of-network care, though the patient pays a higher deductible and coinsurance out-of-network. PPOs are popular because of this freedom, but they carry higher premiums than HMOs. For the CBCS, PPO claims frequently involve two benefit levels, so verifying the provider's network status is essential to quoting patient responsibility correctly.

Exclusive Provider Organization (EPO)

An EPO is a hybrid. Like a PPO, it usually does not require a PCP or referrals to see specialists. Like an HMO, it covers in-network care only—out-of-network care is not reimbursed except in emergencies. This combination gives members specialist access without referrals while keeping premiums lower than a PPO. The key exam point: EPO means no referrals, but in-network only.

Point of Service (POS)

A POS plan blends HMO and PPO features. The member selects a PCP and needs referrals like an HMO, but may go out-of-network at a higher cost like a PPO. It is essentially an HMO that allows out-of-network care with reduced benefits.

Indemnity (Fee-for-Service)

Traditional indemnity, or fee-for-service (FFS), insurance is the oldest model and imposes no network. The patient may see any provider, with no PCP, referral, or authorization requirement. The plan typically pays a percentage (often 80%) of the "usual, customary, and reasonable" (UCR) charge after the deductible, and the patient pays the balance. Indemnity plans have largely been replaced by managed care because of their higher cost and lack of cost controls, but they still appear on the exam as the baseline against which managed care is compared.

Plan Comparison Table

Why This Matters for Billing

Network and referral rules translate directly into claim outcomes. If an HMO patient sees a specialist without a PCP referral, the claim is denied and the provider often cannot bill the patient for the plan's portion. If a PPO patient uses an out-of-network provider, the claim pays at the lower benefit level and the patient owes more. Before scheduling and billing, the CBCS should verify the plan model, confirm network participation, and obtain any required referral or authorization number—recording it so it can be entered on the claim. Many commercial plans also maintain a precertification list of services that always require prior authorization, and consulting it during scheduling avoids surprise denials. When a valid claim is still denied for a network or referral technicality, the CBCS can file an appeal with documentation, but preventing the error up front is faster and cheaper than appealing it. Getting these details right prevents the most common and most avoidable denials in commercial billing.