A new patient comes in, you take a full history, land on a diagnosis, and set a plan without starting a medication. That visit is often a 99203, yet plenty of prescribers second-guess it, worried they should have coded higher or lower. Since 2021, the rules for choosing an office visit level changed, and behavioral health prescribers rarely got clear guidance. Here’s what it is, the two ways to reach it, how to document it, and where it splits from 99204.
What the 99203 CPT Code Is
99203 is the level 3 office or outpatient evaluation and management (E/M) code for a new patient. It sits in the middle of the 99202 through 99205 family.1 “New patient” carries a specific meaning: you, or a colleague of the same specialty and subspecialty in your group, provided no face-to-face professional service in the past three years.1
In behavioral health, it usually describes a lower-complexity new patient encounter, the kind where the picture is fairly clear and you aren’t managing a flare or starting a medication that needs close monitoring. Some practices report the initial psychiatric work with 90791 or 90792 instead. You take the E/M path when you render and document a medical E/M service and choose to report it that way.
Get patient status right before anything else. Call an established patient “new” and you’ve landed in the wrong code family before you score a single element.
99203 Documentation Requirements: Low Medical Decision Making
The first way to reach it is low medical decision making (MDM). MDM has three elements, and you have to meet or exceed the low level in at least two of them.2
- Problems addressed: two or more self-limited or minor problems, one stable chronic illness, or one acute uncomplicated illness or injury.
- Data reviewed: a limited amount, generally any two items across the review and ordering categories.
- Risk: low risk of complications from testing or treatment.
That risk element is where 99203 and 99204 usually part ways. Prescription drug management counts as moderate risk, not low.3 So a first visit where you start or change a psychotropic typically clears the bar for 99204, while a visit that ends with watchful waiting, a referral, or continued monitoring often sits at the lower level.
One reminder that trips up prescribers: history and exam no longer set the level.4 Document them because they’re good care. The code rides on MDM or time.
99203 Time Requirements: Coding by Total Time
The second path is total time. For this level, that means 30 to 44 minutes of your time on the date of the encounter, and current CPT rules ask you to meet or exceed the 30-minute threshold.1
Total time is broader than face-to-face minutes. You can count pre-visit chart review, the visit itself, and same-day documentation and care coordination.2 It leaves out staff time, and it leaves out any service you report separately.
That separation matters in behavioral health. When you bill an add-on psychotherapy code (90833, 90836, or 90838) alongside the E/M visit, the psychotherapy minutes cannot also count toward E/M time. If you plan to code by time, write a short time statement in the note so an auditor sees exactly how you reached 30 minutes.
99203 vs 99204: Where the Line Falls
99203 and 99204 are the two levels new patient visits land on most, so knowing the split is worth your time. 99203 is a new patient visit at low MDM or 30 to 44 minutes. 99204 is a new patient visit at moderate MDM or 45 to 59 minutes.2
Risk is usually the deciding element. No medication change and a straightforward problem tend to keep you at the lower level. Start or adjust a medication, or manage a chronic condition that’s worsening, and you’re generally at 99204.
Both directions carry a cost. Overcode to 99204 without the documentation and you risk downcoding or a takeback. Undercode a genuine 99204 to 99203 and you leave earned revenue behind across a full schedule of intakes. For reference, 99202 sits just below 99203, and 99205 (high MDM, 60 to 74 minutes) tops the family.1
99203 Reimbursement and Avoiding Coding Errors
99203 pays less than 99204 because it reflects lower complexity. Exact figures shift each year, so pull them from the CMS Physician Fee Schedule Look-Up Tool for the national non-facility rate rather than a number copied around the web.5 Commercial payers price the same code on their own schedules.
Before you check any rate, confirm patient status. New versus established changes the whole code family, and the three-year rule settles which one applies.1 A patient you last saw two years ago is established, so their level 3 visit is 99213, not 99203.
The payoff for coding it right is twofold. You keep the revenue you earned, and you shrink your audit exposure, because the level you bill matches the note behind it.
Match the Code to the Visit
Short version: you reach 99203 through low medical decision making or 30 to 44 minutes of total time on the encounter date, and your note has to show whichever path you took. Confirm patient status, capture the MDM elements, and add a time statement when you code by time.
Solid coding starts with solid documentation, and your EHR should make that easier rather than harder. PIMSY is built for behavioral health, with note templates and time capture that keep the level you bill defensible. Curious how it fits your intake workflow? Book a demo and we’ll show you.
Sources
2 AAFP, Time and Medical Decision Making Levels for E/M Services
3 AAFP/FPM, Coding Level 4 Office Visits Using the New E/M Guidelines
