Prolonged Visits: How to Bill 99417, G2212, and Every Prolonged Service Code

Prolonged visits come up constantly, but the codes that cover them are easy to bill incorrectly. To get them right, you need a genuine clinical reason for the extra time, documentation that supports it, and the correct code for your payer and setting. Below, we break down every prolonged service code, when to use each one, and the rules that trip practices up most often.

Prolonged Office E/M Visits: 99417 vs. G2212

Say a level-five office E/M visit runs at least 15 minutes past the maximum time on the date of service. You can bill for that extra time, but which code you use depends on the payer.

• G2212 — CMS established this code, and Medicare payers use it most often. Some commercial payers accept it in place of 99417.
• 99417 — The standard add-on code for a 99205 or 99215 visit. You can bill it exactly one minute after the level-five time threshold ends, but Medicare won’t accept it.

HCPCS code G2212 replaced CPT codes 99358 and 99359 for prolonged office and outpatient E/M visits, effective January 1, 2021. So if you’re still defaulting to 99358/99359 for same-day prolonged office visits with Medicare, expect that claim to deny.

Face-to-Face Prolonged Service Codes (99354–99357)

These codes have much narrower use today. Practices mainly use them to extend the time on codes 99241–99245 or a few other rarely-used codes. They no longer work as add-on codes for 99205 or 99215.

• 99354 — Prolonged E/M in the office or outpatient setting requiring direct patient contact beyond the usual service, first hour.
• 99355 — Each additional 30 minutes (listed separately in addition to the code for the prolonged service).
• 99356 — Prolonged service in the inpatient or observation setting requiring unit/floor time beyond the usual service, first hour.
• 99357 — Each additional 30 minutes.

Non-Face-to-Face Prolonged Service Codes (99358–99359)

These codes cover time your team spends managing a patient’s care without a face-to-face encounter — often before or after an E/M visit. They aren’t add-on codes: you can report them alone, but your documentation must clearly tie them to a related E/M encounter.

• 99358 — Prolonged E/M before and/or after direct patient care, first hour.
• 99359 — Each additional 30 minutes (listed separately in addition to the code for the prolonged service).

Rules That Trip Practices Up

• No overlap with CCM. You can’t bill prolonged service codes in the same service period as chronic care management. If a more specific non-face-to-face CPT code applies, use that instead.
• Qualified providers only. Only physicians and advanced practitioners can use these codes — not nurses or other clinical staff. You also can’t combine them with other E/M codes that qualify for CCM visits.
• Same-day rule. Don’t report 99358 or 99359 for a prolonged service tied to a 99202–99215 visit on the same day as the E/M service. Instead, bill same-day prolonged time with G2212, which applies exclusively to same-day prolonged services and only with the level-five exam.
• Different-day rule. If the prolonged service under 99358 happens on a different day than the E/M visit, you can correlate it with any level of E/M service from 99202–99215.

Getting these codes right protects two things at once: the revenue you’re entitled to, and your practice’s audit exposure. Auditors flag prolonged service codes often, so your documentation has to support every minute you bill.

Frequently Asked Questions About Prolonged Patient Visits

Get These Codes Right, Every Time

Prolonged service billing is a common source of both lost revenue and audit risk. Get a Free Revenue Audit and we’ll show you exactly where your practice stands.