Professional billing is for individual providers — a solo doctor, a small clinic. It's relatively simple: a few codes per visit, straightforward payer rules. Institutional billing is for hospitals — complex, with hundreds of codes per patient, and multiple payers (insurance, Medicare, self‑pay). The medical billing market research shows that professional billing holds the largest share, but institutional billing is the fastest‑growing, with a CAGR above 13%.

What's driving institutional growth? Hospital mergers and acquisitions create larger, more complex systems. The medical billing market trends highlight that the fastest‑growing application is financial, as hospitals use analytics to reduce days in accounts receivable (A/R).

But institutional billing is error‑prone. A single mistake can delay payment for months. That's why many hospitals outsource to specialised billing companies.

The bottom line: if you run a hospital, invest in billing software or outsource. The old paper‑based days are over.