Guide

99417 prolonged services: thresholds and stacking rules

Summary

99417 is the AMA's add-on code for time spent beyond the maximum time of 99205 or 99215, reported once for each additional full 15 minutes, and it only applies when the base visit was coded by total time, not medical decision making. It never stacks onto 99213 or 99214, since the total has to clear the level 5 time range first. Medicare does not recognize 99417 at all; it uses its own prolonged-services code, G2212, with different rules.

By Gale Editorial · Updated 2026-07-26. Every figure cited to a dated source. How we write.

How do I bill prolonged services with 99417?

99417 is reported once for each additional full 15 minutes of total time beyond the maximum time of 99205 for a new patient or 99215 for an established one, and it can only be added when the base visit was coded by time rather than medical decision making 1Ref 1American Medical Association (2023).CPT evaluation and management (E/M) revisions.That the AMA created 99417 as the prolonged-services add-on for total time beyond the maximum time of 99205 or 99215, reported per each additional 15-minute increment, and applicable only when the base visit was coded by time.. It is an add-on code, meaning it is never billed alone; it always accompanies the level 5 visit code it extends.

The practical sequence is: total time for the encounter clears the top of the level 5 time range, the base visit is coded 99205 or 99215 on time, and each further complete 15-minute block beyond that gets its own unit of 99417. A visit that reaches level 5 through medical decision making instead of time, with the clock stopping short of the threshold, has nothing to attach 99417 to.

The exact threshold: what time has to elapse first

The level 5 time ranges are 60-74 minutes for a new patient and 40-54 minutes for an established one, and 99417 begins only once total time exceeds the top of that range — 74 minutes for a new patient, 54 minutes for an established one 1Ref 1American Medical Association (2023).CPT evaluation and management (E/M) revisions.That the AMA created 99417 as the prolonged-services add-on for total time beyond the maximum time of 99205 or 99215, reported per each additional 15-minute increment, and applicable only when the base visit was coded by time.. Time below that ceiling stays inside the base level 5 code; it doesn't earn a partial prolonged-services unit.

Because the threshold is measured against the maximum of the range, not the minimum, a visit at 75 minutes for a new patient has cleared the ceiling by one minute into the first prolonged block, while a visit at 70 minutes hasn't reached it at all and bills as a plain 99205. The gap between 60 and 74 minutes is level 5 alone; only time past 74 starts adding 99417 units.

Reporting each additional increment

Each full additional 15-minute block beyond the threshold is one unit of 99417, so a visit running well past the ceiling reports multiple units on the same claim, one per completed increment 1Ref 1American Medical Association (2023).CPT evaluation and management (E/M) revisions.That the AMA created 99417 as the prolonged-services add-on for total time beyond the maximum time of 99205 or 99215, reported per each additional 15-minute increment, and applicable only when the base visit was coded by time.. The total time for the whole encounter — not just the portion past the threshold — still has to be documented in the note, since that total is what the units are calculated from.

This is why the habit of stating total time explicitly matters more here than on an ordinary level 5 visit: a note that says the visit "ran long" without a number gives a biller nothing to calculate units from, and a prolonged-services claim without a stated total time is difficult to defend if a payer questions it. A partial block that falls short of a full additional 15 minutes doesn't earn its own unit; the extra time still counts toward the encounter, but it rolls into the next full increment rather than being billed on its own.

Why 99417 doesn't stack on 99213 or 99214

99417 only extends 99205 and 99215, the top codes on the office-visit ladder, because the add-on exists specifically for time beyond the maximum of the highest level 1Ref 1American Medical Association (2023).CPT evaluation and management (E/M) revisions.That the AMA created 99417 as the prolonged-services add-on for total time beyond the maximum time of 99205 or 99215, reported per each additional 15-minute increment, and applicable only when the base visit was coded by time.. A visit that runs long but only reaches 99213 or 99214 territory on MDM, without qualifying for level 5 first, has no prolonged-services code to add regardless of how much total time was spent.

This is a common point of confusion: a genuinely long visit isn't automatically eligible for a prolonged-services add-on just because it ran past a lower code's typical time. The clock has to first clear the level 5 ceiling before any additional 15-minute block starts counting toward 99417.

Medicare doesn't recognize 99417 — the G2212 divergence

Medicare does not pay 99417 at all; it created its own prolonged-services code, G2212, with a different time threshold and its own rules for when it applies 2Ref 2Centers for Medicare & Medicaid Services (2023).Evaluation and Management Services Guide.That Medicare applies its own prolonged-services code rather than the AMA's 99417, reflecting the payer-specific divergence in how time beyond the level 5 threshold is billed.. A claim billing 99417 to a Medicare Administrative Contractor will not be reimbursed under that code, regardless of how accurately the time was documented.

The g2212 vs 99417 distinction is its own topic worth reading separately before billing a Medicare prolonged-services claim, since the two codes diverge on the exact minute threshold as well as which payer accepts which. The short version for this article: know which payer you're billing before choosing between them, and never assume the commercial rule applies to a Medicare claim.

What documentation needs to show

A 99417 claim needs the note to state the total time for the encounter as a specific number, not a range or an estimate, since that number is what determines both the base level 5 code and how many prolonged-services units follow it 1Ref 1American Medical Association (2023).CPT evaluation and management (E/M) revisions.That the AMA created 99417 as the prolonged-services add-on for total time beyond the maximum time of 99205 or 99215, reported per each additional 15-minute increment, and applicable only when the base visit was coded by time.. What the additional time was spent on is worth a brief line as well — extended counseling, care coordination, or continued clinical work — even though the code itself doesn't require a minute-by-minute breakdown.

Because total time includes non-face-to-face work done the same day — reviewing records, ordering and interpreting results, documenting — a visit can cross the prolonged-services threshold without an unusually long time in the room, as long as the same-day total genuinely adds up. The note should reflect that the time being billed was actually spent, not backed into from a schedule gap.

What it pays, and whether tracking time is worth it

The current payment for 99417 and for the level 5 base code it extends is available directly in the Physician Fee Schedule search tool for your own locality, rather than assumed from a flat national figure 3Ref 3Centers for Medicare & Medicaid Services (2026).Physician Fee Schedule Search.That CMS publishes a public Physician Fee Schedule look-up tool where any clinician can find the national and locality payment amount for a CPT code, so the payment for 99417 and its base code is checked directly rather than assumed.. For a solo practice, the calculation is whether the extra minutes tracking and documenting total time on genuinely long visits are worth the additional units they unlock.

For a panel with regular long, complex visits — extensive counseling, care coordination, or genuinely difficult decision making — the habit pays for itself quickly, since prolonged-services units are additive on top of an already-earned level 5. For a panel where long visits are rare, it may not be worth building the habit around, though the underlying rule doesn't change either way.

Common questions

No. 99417 only applies when the level 5 base visit, 99205 or 99215, was selected using total time, not medical decision making. If the visit reached level 5 through MDM and the clock never crossed the level 5 time ceiling, there is no prolonged time to attach the add-on code to.

Total time has to exceed the maximum of the level 5 range — 74 minutes for a new patient, 54 minutes for an established one — before the first unit of 99417 applies. Each further complete 15-minute block beyond that adds one more unit.

No. Medicare uses its own prolonged-services code, G2212, instead of 99417, with a different time threshold and its own stacking rule. Billing 99417 to Medicare will not be reimbursed under that code, so knowing which payer you're billing before choosing the prolonged-services code matters, and treating the two as interchangeable is a reliable way to lose a claim.

No. 99417 only extends 99205 and 99215, the level 5 codes. A visit that runs long but only reaches 99214 on MDM has no prolonged-services add-on available, regardless of the total time spent, because the base code never cleared the level 5 threshold that 99417 extends.

The total time for the encounter, stated as a specific number rather than an estimate, since that number determines both the base level 5 code and the number of prolonged-services units. A brief note on what the extra time was spent doing supports the claim further, though it isn't a strict requirement of the code itself.

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References

1.American Medical Association (2023). CPT evaluation and management (E/M) revisions. American Medical Association (AMA). link ✓That the AMA created 99417 as the prolonged-services add-on for total time beyond the maximum time of 99205 or 99215, reported per each additional 15-minute increment, and applicable only when the base visit was coded by time.
2.Centers for Medicare & Medicaid Services (2023). Evaluation and Management Services Guide. CMS Medicare Learning Network (MLN006764). link ✓That Medicare applies its own prolonged-services code rather than the AMA's 99417, reflecting the payer-specific divergence in how time beyond the level 5 threshold is billed.
3.Centers for Medicare & Medicaid Services (2026). Physician Fee Schedule Search. Centers for Medicare & Medicaid Services (CMS). link ✓That CMS publishes a public Physician Fee Schedule look-up tool where any clinician can find the national and locality payment amount for a CPT code, so the payment for 99417 and its base code is checked directly rather than assumed.

https://www.gale.care/for-providers/em-99417-prolonged-services · 3 sources. Competitor details are cited to dated public sources and maintained as they change; figures are estimates, not commitments. Synthetic demonstration.

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