CPT · E/M office visits
99213: Level-3 established patient office visit
99213 reports an office or outpatient visit for an established patient at low medical decision making, or 20 to 29 minutes of total provider time on the date of the encounter. It is the default level for straightforward follow-up care.
What it covers
99213 applies to an established patient — one seen by the same provider, or another provider of the same specialty in the same group, within the previous three years. The visit is selected either on low medical decision making or on total time spent on the date of the encounter.
Low MDM generally means a self-limited or minor problem, or two or more of them, with limited data reviewed and low risk from the management options considered. Total time includes preparation, the face-to-face encounter, documentation, and care coordination performed that day.
When to use it
- A single stable chronic condition being managed without change
- An acute, uncomplicated illness with a clear course
- Routine medication continuation with no dose change requiring assessment
- Any established-patient encounter where total time lands in the 20–29 minute band
Where the boundary sits
| Compared with | The deciding rule |
|---|---|
| 99214 | Move to 99214 when the problems, data, or risk cross into moderate — two chronic conditions with an adjustment, or a new problem with an uncertain prognosis. |
| 99212 | Drop to 99212 for straightforward decision making or 10–19 minutes of total time. |
Documentation that keeps it paid
- State the problems addressed and their status, not just their names
- If billing on time, record the total time and what the time included
- Note the management decision and why it was appropriate
Denial & audit triggers
Reflexive level selection
Practices that bill 99213 for nearly every encounter draw attention for the opposite reason from upcoders: the flat distribution suggests level is being chosen by habit, not documentation.
Frequency edits
Multiple same-day visits by the same provider generally will not both pay without a documented separately identifiable reason.
How it pairs with other codes
- Pairs with a same-day procedure using modifier 25 when the E/M work is significant and separately identifiable
- Pairs with psychotherapy add-on codes when both services are delivered and separately documented
Questions we get asked
- Is 99213 or 99214 more common?
- It depends entirely on the practice's case mix. A distribution that is heavily weighted to one level regardless of patient complexity is the pattern payers examine, in either direction.
- Can 99213 be billed by time alone?
- Yes, when total time on the date of the encounter reaches 20 minutes and the note records the time and what it covered. Time and MDM are alternative pathways, not a combined test.
Reference only, and typical rather than universal: coverage, modifier requirements, and payment vary by payer, plan, state, and provider type. Confirm current payer policy before billing. CPT is a registered trademark of the American Medical Association; official descriptors are not reproduced here.
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