How to Bill 90 Minute Therapy Sessions

Note: these guidelines no longer apply in 2023/2024 due to changes by the APA and CMA on extended session billing

Have you wondered how to bill out therapy sessions that are over a typical 60 minute session? This short article will teach you how to bill 90 minute therapy sessions.

Units vs Extended Session CPT Codes

While it may seem like the obvious thing to do, adding more units to your billing is not how to bill extended sessions.

how to bill for 90 minute therapyRather, what is required to bill for 90 minutes is an add-on code on a new line in box 24 of your CMS1500 form.

To bill an insurance claim for a 90 minute individual therapy session:

  • bill 90837
  • with add-on code 99354

for an additional 30 to 74 minutes of therapy.  (Source)

2+ Hour Therapy Billing

What about sessions longer than 2:15 hours?  Check out our extended sessions billing guide for more information.

Add an additional 30 minute add-on code (and continue doing so) until you’ve reached your desired time frame.

So if you perform 3 hours of therapy at once:

  • bill 90837 (60 minute individual session)
  • +99354 (30-74 minutes of additional therapy)
  • + 99355 (30 additional minutes of therapy)
  • + 99355 (30 additional minutes of therapy)

How to Bill 90 Minute Therapy the Easiest Way!

Billing for your longer sessions seem overly complicated?

Inquire with us at TheraThink about how we can help handle all of these cases and coding for you.

90 Minute Therapy Coding Example

90 minute therapy example

Other Extended Billing Suggestions!

You can bill for longer sessions with other types of codes.  Here’s a table!:

Individual Therapy CPT CodeAdd-On CPT Code for Extended SessionLength of SessionServices Rendered
9083216-37 minutesPsychotherapy, 30 minutes
9083438-52 minutesPsychotherapy, 45 minutes
9083753 - 89 minutesPsychotherapy, 60 minutes
908379935490-134 minutesPsychotherapy, 1:30 hrs - 2:14 hrs
135-164 minutesPsychotherapy, 2:15 hrs - 2:44 hrs
165-194 minutesPsychotherapy, 2:45 hrs - 3:14 hrs
99050N/aServices performed outside of business hours.
99051N/aPlanned services performed in the evening, weekend, or during a holiday.

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