CPT
90471 — Immunization administration, single vaccine
ACA-covered vaccines should be free, including the admin fee.
Office & outpatient evaluation
99203 — New patient office visit, low complexity (30 min)
A first-time visit with a new provider for a low-complexity problem. Around 30 minutes total time. Most commonly upcoded.
- Typical setting: Doctor's office
- National avg charge (illustrative): Insurance allowed $90-$200; cash $150-$400.
- Most-disputed reason: Upcoded to 99204 without documented moderate complexity.
What it means
What 99203 actually means
CPT 99203 is the second-lowest level of new-patient office visit, implying a low-complexity problem and roughly 30 minutes of provider time. To support this code, the chart should show a focused history, a focused exam, and straightforward decision-making.
If the visit was a one-issue intake (sinus infection, sprained ankle, medication consultation) without a complex workup, 99203 is the appropriate level. Higher levels require documented complexity.
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).
- Upcoded to 99204 with no documented moderate complexity in the chart.
- Hospital outpatient facility fee added without notice (G0463).
- Time-based billing claimed without the actual time documented.
- Coded with diagnosis that doesn't support medical necessity, triggering insurer denial.
If you see 99203 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 99203 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 99203 on a bill.
99203 FAQ
Plain-English answers.
How do I know if 99203 was upcoded to 99204?
Pull your visit notes. 99204 requires moderate-complexity decision-making (chronic illness with progression, new problem with prescription drug management, or multiple problems). If your visit was a single straightforward issue, 99203 was correct.
What should 99203 cost?
Insurance allowed amounts run $90-$200. Cash-pay at non-hospital practices is typically $150-$400. Hospital-owned practices may add a separate G0463 facility fee.
Don't pay 99203 blindly.
The free scan tells you in under 60 seconds whether this charge looks reasonable for your situation.