ASC Billing for California Surgery Centers

California is a non-Certificate-of-Need state, so its ASC supply is deep and the competition for surgical volume is fierce — LA, San Francisco, San Diego, Sacramento, and Orange County each hold clusters of single-specialty and multi-specialty centers fighting for the same commercial and Medicare Advantage lives. That market shape puts constant pressure on the facility fee, and three California-specific rules decide whether a case pays cleanly.

First, Medi-Cal does pay an ASC facility fee, but much of the state's Medicaid population sits inside managed-care plans, each with its own authorization pathway and its own idea of what belongs on the ASC-approved list. Second, workers' compensation cases — a meaningful slice of orthopedic and pain-center volume — are priced under the California Official Medical Fee Schedule (OMFS) ASC rules, not the commercial rate sheet, so the same CPT carries a different facility allowable depending on payer. Third, out-of-network balance-billing is governed by California's AB-72 layered under the federal No Surprises Act, which changes how an out-of-network ASC may bill the patient and how disputes are resolved. Claims here also route through MAC Noridian (Jurisdiction JE) for straight Medicare Part B under the ASC Payment System. Getting all four aligned on a single facility claim is what separates a paid center from a written-off one.

Most lost ASC revenue in California is preventable — it comes from authorization gaps, packaging errors, and out-of-network handling, not from bad medicine. In a non-CON market where MA and commercial payers carry most of the volume, prior authorization is the single largest cause of preventable denials: a mismatched CPT, an auth tied to the wrong site of service, or an expired approval will stop an otherwise clean facility claim cold. Layer California's OMFS workers' comp rules and AB-72 out-of-network handling on top, and a center without dedicated facility-billing expertise loses margin on cases it fully earned. Each leak below has a repeatable fix, and we build those checks into the workflow before a claim ever leaves the door.

Running an in-house ASC billing team in a market this competitive is expensive and fragile — one coder's departure can stall an entire A/R cycle. Centers outsource to us because a specialist ASC billing company holds the payment-indicator logic, device-invoice discipline, and California payer knowledge that a general billing services company rarely maintains for facility claims. As a full medical billing services company focused on the facility revenue cycle, 247MBS delivers a 99% first-pass clean-claim rate, up to 40% fewer denials, 90% of worked denials recovered, and days in A/R held under 25, backed by 98% client retention over 20+ years. Our coders are credentialed professionals, and you keep a dedicated account manager plus the free 360° dashboard for real-time visibility. When you outsource the facility claim to us, you keep clinical control and hand off the part that leaks money. See the full ASC billing overview, our approach to surgery-center prior authorization, and the broader California medical billing services picture.