The CPT medical abbreviation most often means Current Procedural Terminology, the set of codes that describe medical, surgical and diagnostic services for billing and records. Every office visit, lab test and procedure is usually turned into one or more CPT codes before a claim goes to an insurer.
In respiratory care, CPT has a second meaning: chest physiotherapy, a set of techniques that loosen mucus in the lungs. This page explains how CPT codes are built, how they pair with diagnosis codes, where you will see them on bills, and how to tell the coding meaning from the therapy one.
At a glance
Stands for
Current Procedural Terminology; chest physiotherapyMaintained by
The American Medical AssociationWritten as
Five characters, such as 99213 or 0042TWhere you see it
Claims, bills, explanation of benefits, coding notesPairs with
ICD codes for diagnosesDo not confuse with
CPT for chest physiotherapy in respiratory orders
What the CPT medical abbreviation means for billing
CPT is a coding system maintained by the American Medical Association and updated every year. Each code stands for a specific service, such as a new patient office visit, a chest X-ray, a blood count or a knee replacement. Coders read the clinician's note in the EHR and assign the codes that match the work documented.
Insurers, including Medicare, use CPT codes to decide what they pay. In federal coding terms, CPT is also known as Level I of the HCPCS system; Level II covers items such as supplies and some drugs.
The three categories of CPT codes
| Category | Format | Used for |
|---|---|---|
| Category I | Five digits, such as 99213 | Common services and procedures, used for most billing |
| Category II | Four digits plus F | Tracking quality measures, usually not paid on their own |
| Category III | Four digits plus T | New and emerging services still being studied |
Two digit modifiers can be added to a code to give more detail, such as showing that a separate service was done on the same day or that a procedure was done on both sides of the body.
Reading a CPT code on a bill
On an itemized bill or explanation of benefits, CPT codes sit beside a short description. Office visits with an established patient often fall in the 99211 to 99215 range, where a higher number reflects a more complex visit.
Line from an explanation of benefits: "99214, office visit est pt, dx I10." The first number is the CPT code for a moderately complex visit with an established patient. The dx code is the ICD code for high blood pressure, which explains why the visit was needed.
If a code looks wrong, the billing office can explain how it was chosen, and you can ask for a review.
CPT and ICD codes work together
CPT tells the payer what was done, and ICD tells it why. A claim usually needs both. A clinic might bill a chest X-ray with one CPT code and attach an ICD code for cough. Hospitals use different code sets for inpatient procedures, while doctors' services inside the hospital still use CPT. Teams in CDI programs help make sure notes support the codes chosen. Hospital stays are often grouped further into DRG categories.
Chest physiotherapy, the other CPT
In lung care orders, CPT means chest physiotherapy. A respiratory therapist or nurse uses clapping on the chest or back, vibration and positioning so gravity helps drain mucus. It is common in cystic fibrosis and some cases of pneumonia. An order might read "CPT q4h while awake," and it is often given by an RRT. If CPT appears in a breathing treatment order, it is the therapy, not a billing code.
Coders and billing staff will find related shorthand in the collection of credential and workplace abbreviations.
Coding and coverage rules change often and differ by plan. For a question about a code on your bill, contact the billing office of your provider or your insurer.
Frequently asked questions
What does CPT stand for in medical billing?
CPT stands for Current Procedural Terminology. It is the code set that describes medical services and procedures for billing and records.
Who creates CPT codes?
The American Medical Association maintains CPT and releases updates each year. Insurers and government payers then use the codes on claims.
What is the difference between CPT and ICD codes?
CPT codes describe what service was performed. ICD codes describe the diagnosis or reason for the service. Most claims list both.
How many digits is a CPT code?
CPT codes have five characters. Category I codes are all numbers, while Category II and III codes end in a letter, F or T.
What does CPT mean in respiratory therapy?
In breathing treatment orders, CPT means chest physiotherapy, techniques like clapping and positioning that help clear mucus from the lungs.