Who decides what a CPT code means?

The CPT code set is maintained by the American Medical Association through its CPT Editorial Panel and updated regularly.

What is the difference between CPT and HCPCS codes?

CPT codes (HCPCS Level I) describe services and procedures. HCPCS Level II codes, which start with a letter, cover items such as supplies, drugs, ambulance services and equipment.

Can I ask what a code on my bill means?

Yes. The provider’s billing office can tell you what each code describes and send an itemized bill showing every code.

CPT CODES

What is a CPT code on my medical bill?

A CPT code is a five-character code that describes what a provider did — an office visit, a blood test, an X-ray, a procedure. It is how the provider tells your insurer what to pay for, so each charge on an itemized bill usually has one.

Why it’s confusing

Bills often print the code with a short, abbreviated description — “OFFICE O/P EST LOW 20 MIN” — or with no description at all. The codes look like account numbers, so people skip them, but they are the most useful thing on the bill when something looks wrong.

CPT codes also sit alongside other codes. HCPCS Level II codes (a letter followed by four numbers) cover supplies, drugs and services such as ambulance trips; ICD-10 codes describe the diagnosis, the reason for the care.

How to read it

CPT stands for Current Procedural Terminology. The code set is maintained by the American Medical Association, and CMS describes it as Level I of the national coding system insurers use to process claims.

Most CPT codes are five digits (Category I, which runs from 00100 to 99499). Category II and III codes are alphanumeric — four numbers and a letter — used for tracking quality measures and for new technology.

On your bill, read each code with its date and quantity. The same code twice on one date may be a duplicate, or may be two of the same service — it is fair to ask which. A code for something you don’t remember having is also worth asking about.

Invented lines from an itemized bill. Not anyone’s real bill.

On the document	Shows	In plain language
99213	$165.00	An office visit for an established patient — a five-digit Category I CPT code.
85025	$48.00	A complete blood count, a common lab test.
J1100	$22.00	A HCPCS Level II code — the letter shows it is a drug or supply rather than a CPT service.

Reading the code, not just the description, lets you ask the billing office a precise question about any one line.

What it does not mean

That the code describes your diagnosis. That is what ICD-10 codes are for.
That a code with a higher number costs more. The numbers are organised by type of service, not by price.
That a code is proof the service happened. Mistakes happen, and you can ask for the record behind any charge.

Where you’ll see it

Itemized bills and statements from doctors, hospitals and labs.
Insurance EOBs, sometimes as a “procedure code” column.

Questions worth asking

Ask the billing office

Can you send an itemized bill with the code for each charge?
What does this code describe, and why does it appear twice?
Was this code billed to my insurance?

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Common questions

Who decides what a CPT code means?: The CPT code set is maintained by the American Medical Association through its CPT Editorial Panel and updated regularly.
What is the difference between CPT and HCPCS codes?: CPT codes (HCPCS Level I) describe services and procedures. HCPCS Level II codes, which start with a letter, cover items such as supplies, drugs, ambulance services and equipment.
Can I ask what a code on my bill means?: Yes. The provider’s billing office can tell you what each code describes and send an itemized bill showing every code.