CPT
90471 — Immunization administration, single vaccine
ACA-covered vaccines should be free, including the admin fee.
Mental health
90834 — Psychotherapy, 45 minutes with patient
Standard 45-minute psychotherapy session. Most-billed mental health code.
- Typical setting: Outpatient or telehealth
- National avg charge (illustrative): Insurance allowed $80-$170; cash $100-$250.
- Most-disputed reason: Network adequacy issues; out-of-pocket pricing higher than insurance allowable.
What it means
What 90834 actually means
CPT 90834 is a 45-minute psychotherapy session with the patient. It's the most common psychotherapy code billed in U.S. mental health care.
Common errors with this code
What goes wrong on real bills.
Most bills that look correct still contain at least one of these issues. Up to 49% of medical bills contain errors (CFPB).
- Out-of-network therapy charged at higher rate than in-network alternative.
- Billed as 90837 (60 min) when actual session was 45 minutes or less.
- Coded with diagnosis that doesn't justify medical necessity for insurance.
If you see 90834 on your bill
Three steps before paying.
1. Get the itemized bill. If your statement only shows a summary, request the CPT-level itemized bill before paying. Generate the request language →
2. Cross-check against the EOB. Compare what your insurer's Explanation of Benefits says you owe versus what the hospital is asking. They disagree more often than people think. Read the bill-vs-EOB guide →
3. Run a free Bill Scan. Upload the bill (and EOB if you have it) and BillBusted will flag the most likely issues with this specific code in your specific state. Run free scan →
Related codes
Other codes in this category.
People who land on 90834 often also see these adjacent codes on the same bill.
CPT
90472 — Immunization admin; each additional vaccine
Vaccine — admin (90471) is separate from the vaccine product code.
CPT
90651 — Human papillomavirus vaccine types 6, 11, 16, 18, 31, 33, 45, 52, 58, nonavalent , IM
Vaccine — admin (90471) is separate from the vaccine product code.
CPT
90670 — Pneumococcal conjugate vaccine, 13 valent , IM
Vaccine — admin (90471) is separate from the vaccine product code.
CPT
90671 — Pneumococcal conjugate vaccine, 15 valent , IM
Vaccine — admin (90471) is separate from the vaccine product code.
CPT
90677 — Pneumococcal conjugate vaccine, 20 valent , IM
Vaccine — admin (90471) is separate from the vaccine product code.
Related BillBusted guides
Plain-English reads if you see 90834 on a bill.
90834 FAQ
Plain-English answers.
Why does therapy cost so much out-of-pocket?
Network adequacy is poor for mental health, so many therapists don't take insurance. If you're paying full freight, request a superbill — your insurer may reimburse out-of-network mental health visits.
Don't pay 90834 blindly.
The free scan tells you in under 60 seconds whether this charge looks reasonable for your situation.