How can I look up a CPT code?

You can search for CPT codes using the AAPC's free code lookup tool (aapc.com), the AMA's CPT code search, or by simply searching the code number online. The description should match the service you received.

Upcoding is when a provider uses a more expensive CPT code than the service actually warrants — for example, billing for a high-complexity visit (99215) when a moderate visit (99213) occurred. It inflates your bill and your insurance payment. If you suspect upcoding, request your medical records and compare the documented visit to the billed code.

Common CPT Codes: A Patient's Quick Reference Guide

What Are CPT Codes and Why Should You Care?

CPT (Current Procedural Terminology) codes are the five-digit numbers that appear on your medical bills and insurance claims. Each code represents a specific medical service, procedure, or test. Understanding the most common codes helps you verify that you are being charged for services you actually received and can help you spot billing errors like upcoding or duplicate charges.

Office Visit Codes (99201-99215)

These are the codes you see most often. They are divided by whether you are a new patient (99201-99205) or an established patient (99211-99215), and by the complexity of the visit. 99213 is the most common — a standard office visit for an established patient with moderate complexity. 99214 is for more detailed visits, and 99215 is the highest-level established patient visit, typically used for complex or time-intensive problems. If you had a quick 10-minute check-up but see 99215 on your bill, you may be a victim of upcoding.

Emergency Department Codes (99281-99285)

ER visits use a separate set of codes based on severity: 99281 (minor, self-limiting problem), 99282 (low to moderate severity), 99283 (moderate severity), 99284 (high severity), and 99285 (high severity with immediate significant threat to life). Higher-level codes cost significantly more — the difference between 99283 and 99285 can be thousands of dollars. If you went to the ER for something minor and see a 99284 or 99285 code, question it.

Lab and Imaging Codes

Common lab codes include: 85025 (complete blood count/CBC), 80053 (comprehensive metabolic panel), and 81001 (urinalysis). Common imaging codes include: 71046 (chest X-ray, two views), 70553 (brain MRI with and without contrast), and 74177 (CT abdomen and pelvis with contrast). These codes help you verify that you received the specific tests shown on your bill.

Procedure Codes

Surgical and procedure codes vary widely. Some common ones include: 36415 (routine venipuncture/blood draw), 10060 (incision and drainage of abscess), 29125 (forearm splint), and 99291 (critical care, first 30-74 minutes). If you see an unfamiliar procedure code on your bill, look it up using a free CPT code search tool or ask the billing department for a plain-language description.