CPT Code Lookup

Understand Your Medical Bill

Look up the CPT codes on your bill and find out what you were actually charged for — in plain language, with typical costs and common billing errors to watch for.

Why this matters: Medical billing errors appear on an estimated 80% of hospital bills. Knowing what each CPT code means — and what it should cost — is the first step to catching overcharges and disputing incorrect bills.

Office Visits & Consultations

The most common codes on your bill. These cover routine check-ups, follow-up visits, and new patient appointments. Upcoding (billing a higher-level visit than what occurred) is one of the most frequent billing errors.

Preventive Care & Annual Physicals

Preventive visits are often covered at 100% by insurance — but only if coded correctly. If your annual physical gets billed as a regular office visit, you could owe a copay you shouldn't.

Lab Work & Blood Tests

Lab charges often show up as separate line items from your doctor visit. These codes cover the most common blood draws and tests you'll see on a bill.

Imaging & Radiology

X-rays, MRIs, CT scans, and ultrasounds are some of the most expensive items on a medical bill. Prices vary dramatically by facility — the same MRI can cost $500 or $5,000.

Therapy & Behavioral Health

Therapy sessions are billed by duration. Make sure the code on your bill matches the actual length of your session — a 45-minute session should not be billed as a 60-minute one.

Heart & Cardiology

Heart tests like EKGs and echocardiograms are common additions to a checkup or ER bill. Know what each test does and what it typically costs.

Procedures & Surgery

From colonoscopies to knee surgery — these are higher-cost procedures where understanding the billing can save you hundreds or thousands of dollars.

Physical Therapy

Physical therapy is billed in 15-minute increments. Watch for "unbundling" — where a single session gets split into multiple line items that inflate the total.

Telehealth & Injections

Phone consultations and injections round out common billing items. Telehealth visits should generally cost less than in-person visits — check that your bill reflects this.

Skin & Dermatology

Skin biopsies, wart removals, and precancer treatments are common dermatology charges. Make sure the number of lesions on your bill matches what was actually treated.

Pregnancy & Obstetrics

Delivery bills are among the most expensive you'll encounter. These "global" codes bundle prenatal, delivery, and postpartum care — make sure you're not being double-billed for individual visits.

Breathing & Pulmonary

Breathing tests and nebulizer treatments are common for asthma, COPD, and respiratory infections. These are often add-ons to an ER or office visit bill.

How to Read Your Medical Bill

1

Find the CPT codes. Every medical bill lists procedure codes — usually 5-digit numbers. These are CPT codes, and they describe exactly what service was performed.

2

Look up each code above. Check if the description matches what actually happened during your visit. A "complex office visit" (99215) when you had a 10-minute check-up is a red flag.

3

Compare to typical costs. Each code has a Medicare rate and a typical charge range. If your charge is far above the range, ask your provider to explain.

4

Watch for high-error codes. Codes marked with a yellow dot above have higher rates of billing errors. Pay extra attention to these.

Disclaimer: This page provides general information about CPT codes and medical billing for educational purposes only. Actual charges vary by provider, location, and insurance plan. Medicare rates shown are national averages and may differ by region. This is not billing or legal advice. If you believe you've been incorrectly billed, contact your provider's billing department or your insurance company.

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