CPT code
Established patient office visit, short
In the order to send them
Why these codes
When a psychiatrist bills an office visit, payers answer under mental health; the office visit benefit is the fallback.
If a payer returns nothing
Payers don't all answer every service type. Send 30 (Health Benefit Plan Coverage) for the plan's general benefits.
Sources
X12 HIPAA 5010 service type code definitions; VerifyTX billing practice