CPT code 90785: Interactive complexity, communication factors2026 Medicare rate & RVUs in Massachusetts
Report interactive complexity when communication barriers or other specified factors complicate a psychiatric evaluation or psychotherapy service.
Medicare pays $15.07–$15.86 for 90785 in the office in Massachusetts, from Rest of Massachusetts to Metropolitan Boston, MA. Which amount applies depends on the service address.
Medicare allowed amount for participating (non-QP) physicians, before deductible, coinsurance and claim adjustments. Not a patient’s bill or a hospital charge.
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What 90785 covers
Code 90785 captures added communication work during a psychiatric service, not a separate evaluation or a longer psychotherapy session. Examples include using play equipment to communicate with a young child, working through an interpreter, coordinating with a third party whose involvement complicates the exchange, or addressing a disclosure that requires mandated reporting. Psychiatrists, psychologists, clinical social workers, and other qualified mental health clinicians may encounter these circumstances in office or facility settings.
Report 90785 only with an eligible primary psychiatric service, such as a psychiatric diagnostic evaluation or psychotherapy; it is not billed by itself. The record should identify the communication factor and explain how it affected delivery of the primary service. CMS classifies it as an add-on paid within the primary procedure’s global period, so submit it with that procedure rather than as a standalone service.
This summary was written with AI assistance from CMS physician fee schedule data and checked against the CMS billing rules shown here. Rates on this page come directly from CMS files.
Billing guides for 90785: Psychotherapy CPT codes · Mental health billing
Where 90785 pays more and less in Massachusetts
| Payment locality | Office | Facility |
|---|---|---|
| Metropolitan Boston, MA | $15.86 | $12.27 |
| Rest of Massachusetts | $15.07 | $11.90 |
How the 90785 rate is calculated
Each of 90785’s three RVUs is multiplied by a geographic index (GPCI) for the payment locality, added up, and multiplied by the conversion factor. Drag the indexes or enter a ZIP to see what moves the rate.
How the rate is built · 90785
RVUs × geographic indexes × conversion factor
Work0.33
0.33 RVUs× 1.000 GPCI
Practice expense0.11
0.11 RVUs× 1.000 GPCI
Malpractice0.00
0.00 RVUs× 1.000 GPCI
Adjusted RVUs
0.4400
Conversion factor
$33.4009
Medicare rate
$14.70
Every GPCI starts at 1.000, the national rate. Enter a ZIP or drag a slider.
Payment rules and modifiers for 90785
The CMS indicators that decide how 90785 is paid alongside other services.
CMS payment indicators · 90785
Interactive complexity, communication factors
| Rule | CMS value | What it means |
|---|---|---|
| Global period | ZZZ | Add-on code: falls within the primary procedure’s global period. |
| Multiple procedures | 0 | No multiple-procedure reduction. |
| Bilateral (modifier 50) | 0 | The 150% bilateral adjustment doesn’t apply. |
| Assistant at surgery (80/81/82/AS) | 9 | The concept doesn’t apply. |
| Co-surgeons (62) | 0 | Not permitted. |
| Team surgery (66) | 0 | Not permitted. |
| Professional/technical | 0 | Physician service: no professional/technical split. |
90785 compared with similar codes
Compare codes · National
4 codes, side by side
How to choose
- 90791Psychiatric evaluationWithout medical services
- 90791 is the psychiatric diagnostic evaluation itself. Add 90785 only when a qualifying communication factor complicates that evaluation.
- 90792Psychiatric evaluationWith medical services
- 90792 describes a psychiatric diagnostic evaluation that includes medical services. Code 90785 may be added when communication factors complicate that evaluation; it does not replace 90792.
- 90837Psychotherapy60 minutes, no E/M
- 90837 reports an individual psychotherapy service. Code 90785 is an add-on for qualifying interactive complexity during the psychotherapy, not a substitute for the psychotherapy code.
90785 billing questions
When should 90785 be added to a psychiatric service?
Use it when a specific communication factor complicates delivery of the primary psychiatric service, such as interpreter use or communication through play equipment. The record should explain the factor and its effect on the encounter.
Can 90785 be billed by itself?
No. It is an add-on code and must be reported with an eligible primary psychiatric procedure, such as 90791, 90792, or a psychotherapy service.
Does a difficult or lengthy session alone support 90785?
No. Session difficulty or length alone does not establish interactive complexity; document the specific communication circumstance that complicated the service.
Is interpreter use an example of interactive complexity?
It can be when an interpreter is needed to overcome a communication barrier during the psychiatric service. Document the interpreter’s role in facilitating the clinical exchange.
How does CMS treat payment for 90785?
CMS treats 90785 as an add-on paid within the primary procedure’s global period. Submit it with the primary service.
Where these rates come from
FeeBase calculates base physician payments from CMS work, practice-expense and malpractice RVUs, adjusted by each locality’s geographic indexes and the conversion factor. Services without a published rate are labeled, never given a made-up amount. Amounts are Medicare allowed amounts before claim adjustments: not a patient’s bill or a commercial rate.
CMS RVU26D · effective Oct 1, 2026 through the day before Jan 1, 2027
Show the CMS file lines behind this rate
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