Billing for therapy services in the US involves many steps and strict rules. Therapists face challenges with choosing the right CPT codes (e.g. 90791 for psych eval, 90834 for 45-min therapy, 90837 for 60-min), obtaining prior authorizations, and credentialing with payers. Many also struggle with correctly billing telehealth sessions. Proper documentation is essential; incomplete or incorrect notes lead to denials. Federal guidelines (CMS, HHS) and AMA CPT guidance provide direction, but each insurer has its own rules. This article outlines the top billing challenges and solutions.
Therapists often use CPT codes that depend on session length and type. For example, 90834 (45-min individual therapy) vs. 90837 (60-min). Choosing the wrong code or missing a required modifier (such as 90785 for interactive complexity) will trigger a denial. Many practices overlook reauthorizations: after a set number of sessions, Medicare and private insurers require prior auth to continue therapy. Credentialing is another hurdle – if a therapist isn’t enrolled with a plan, claims bounce back. The shift to telehealth and evolving insurance policies adds more complexity for schedulers and billing staff. Even simple data entry errors (wrong birthdate, address) lead to denials, so front-desk accuracy is vital.
The key to smoother billing is clear processes and accuracy. Always verify insurance eligibility and benefits before each visit. Use intake checklists or software tools to confirm patient data and plan limits. Keep track of authorizations with reminders so no session exceeds approved limits. Train staff to select the correct CPT code and modifier each time. For example, bill 90832/34/37 only for therapy time, and append add-on codes (90833/36/38) if a medical evaluation occurred. Use standardized note templates to ensure each record includes time spent and diagnoses, and consider adding brief assessment codes (e.g. 96127 for depression screens) when appropriate. Also be sure to use modifier 25 if a separate E/M service occurs on the same day, avoiding bundled denials. Continuously train staff on new CPT updates (for example, adding new group session codes) to keep up with annual coding changes.
When a claim is denied, act quickly: read the reason, correct any error, and re-submit or appeal. Common fixes include updating patient info, adding missing codes, or including a prior auth number. In challenging cases, contact the payer’s provider helpline or check their billing guidelines. Many therapists find that partnering with a healthcare billing company helps enforce best practices. These experts stay current on CMS rules, audit claims workflows, and often conduct regular billing audits to catch errors early.
Teletherapy is now widespread, but it comes with special rules. Since 2020, CMS permanently allows core mental health CPT codes for video visits with established patients. Therapists should know which codes are covered (most 90832-90853 codes) and use the correct modifier 95 or place-of-service for virtual sessions. Some insurers also cover audio-only counseling, but policies vary by state; some even temporarily allow audio-only claims. Parity laws generally require insurers to cover mental health care on par with medical care. Always check each state’s telehealth regulations, maintain proper consent forms, and use HIPAA-compliant platforms to stay compliant.
A small counseling clinic repeatedly lost revenue due to missed authorizations and outdated patient info. By implementing a policy to verify benefits 48 hours before appointments and tracking authorizations in their EHR, denials dropped sharply. They also adopted standard note templates to capture time and diagnoses clearly. In one year, denials fell by 80% and collections improved. This real-world case shows how defined processes – often managed by a healthcare billing company – solve common problems in a busy practice.
| CPT Code | Use Case | CPT Code | Use Case |
| 90791 | Psych eval (initial, no Rx) | 90834 | 45-min individual psychotherapy |
| 90837 | 60-min individual psychotherapy | 90847 | Family therapy (with patient) |
Billing issues shouldn’t take therapists away from patient care. Contact our healthcare billing company for a free billing audit and practical advice. We help practices simplify claims, reduce denials, and boost revenue.
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