A Practitioner’s Guide to Mastering CPT Codes

May 28, 2024

Health and wellness practitioners who bill insurance or provide Superbills to clients need to be well-versed in Current Procedural Terminology (CPT) codes.

Accurate use of these codes is critical for successful billing and reimbursement. These codes are also important for documenting healthcare services provided to patients.

Even practitioners who are paid directly by clients may need to be up to speed on CPT codes. That’s because local regulations and licensing boards may have specific requirements to use CPT codes for the purposes of record-keeping and documentation. 

With CPT codes changing yearly, staying up to date is critical. Keep reading for your complete CPT code primer, including how they’re structured, who maintains them, how they differ from other medical codes, and where to find the most up-to-date codes.

Key takeaways

  • CPT codes are used to report surgical and medical procedures and services and diagnostic services. They are critical for accurate reporting and reimbursement.
  • There are three categories of CPT codes, plus modifiers that provide additional information. CPT codes are different from ICD-10 codes and have some overlap with HCPCS codes.
  • The American Medical Association’s CPT Editorial Panel is responsible for revising, updating, and modifying CPT codes, descriptors, rules and guidelines.

The Practice Better Claim.MD integration helps you manage all of your billing and payment needs, including CPT codes, all in one place.

The basics of current procedural terminology (CPT) codes

Entering CPT Procedure codes in Practice Better.

CPT codes are a standardized set of codes used to describe medical, surgical, and diagnostic services provided to patients in the US healthcare system.

Developed and maintained by the American Medical Association (AMA), CPT codes are essential for billing and reimbursement through health insurance providers. 

For health and wellness practitioners who operate within the traditional US reimbursement and billing system, these codes can cover services like evaluations, consultations, therapeutic interventions, and more.

CPT code structure

A CPT code typically consists of three parts:

  1. Numeric Code. CPT codes begin with a five-digit numeric code, which is the core identifier for a specific medical procedure or service.
  2. Modifier. Some CPT codes may include one or more two-digit modifiers. Modifiers provide additional information about the service or procedure performed. For example, modifiers can indicate that a procedure was performed on the left or right side of the body or that multiple procedures were performed during the same session.
  3. Description. Each CPT code is associated with a description that explains what the code represents. This allows healthcare providers and payers to understand the nature of any service provided.

CPT vs. ICD Codes

In the simplest terms, CPT codes describe things like procedures and services and ICD codes describe diagnoses and conditions. 

ICD stands for International Statistical Classification of Diseases. ICD-10 codes are maintained and updated by the World Health Organization (WHO) and used around the globe for the purposes of health recording and statistics.

In the US, ICD-10-CM codes are standard, where the CM stands for “Clinical Modification.” These codes include additional clinical details and specificity, making them more suitable for clinical and billing purposes within the US healthcare system.

Types of CPT codes: a closer look

CPT codes are divided into three main categories: Category I, II, and III.

Category ICategory IICategory III
The most common. Used to describe procedures, tests, office visits, and treatments.Supplementary codes used for performance measurements and quality reporting.Temporary codes used for emerging technologies and services, not billing.
Used for billing and documentation.Released three times per year, in March, July, and NovemberOften used in clinical trials.
Released once per year in January.Released twice per year, in January and July.

Category I CPT codes

Category I codes are the most commonly used CPT codes for billing and documentation. They describe a wide array of medical procedures, diagnostic tests, office visits, and treatments relevant to healthcare providers and wellness professionals. 

For example, CPT code 97802 is a Category I code that represents “Medical nutrition therapy; initial assessment and intervention, individual, face-to-face with the patient, each 15 minutes.” Registered dietitians and nutrition professionals use this code to bill for their services when providing individualized medical nutrition therapy to patients.

Category II CPT codes

Category II codes are supplementary codes used for performance measurement and quality reporting. They are not used for billing. Rather, these codes help with data collection for quality reporting and research.

While practitioners won’t commonly use Category II codes in their day-to-day practice, they may use them in situations where they are participating in quality improvement initiatives or research. 

For example, Category II CPT code 3008F is used to document body mass index (BMI) in adults. Specifically, it indicates that healthcare providers have documented an adult patient’s BMI as part of the patient’s medical record. 

Category III CPT codes

Category III codes are temporary codes used with emerging technologies and services that don’t yet have established Category I codes.

These codes allow providers, payers, and researchers to track the use of and outcomes related to new and experimental treatments or technologies. They are often used in clinical trials or when new procedures are in the early stages of adoption.

It’s unlikely that practitioners would use Category III codes, but it could be possible. For example, someone who is involved in clinical research or trials that involve novel wellness interventions or technologies might use these codes to document and track the specific procedures or services they are providing as part of the study.

What are five common CPT codes?

The CPT codes that wellness practitioners use frequently when billing will depend on the nature of services provided. Here are five Five CPT codes that could be commonly used in a wellness practice. 

CPT code 99401 – Preventive Medicine, Individual Counseling. Wellness professionals might use this code for counseling sessions related to lifestyle modifications, such as nutrition, exercise, or stress management.

CPT code 99078 – Group Health Education. Wellness professionals who conduct group workshops or classes on various health and wellness topics (e.g., diabetic teaching or a prenatal nutrition class for expectant mothers) might use this code to document those educational sessions.

CPT code G0438 – Annual wellness visit (AWV), includes personalized prevention plan of service (PPPS), initial visit. CMS allows for AWV coverage for a medical professional or team under a physician’s supervision, for example registered dietitians or health educators. 

CPT code G0439 – AWV, includes PPPS, subsequent visit. This code is used for AWV visits following the initial one. 

CPT code 97802 – Medical Nutrition Therapy Procedure. A dietitian could use this code for an initial individual, face-to-face assessment and intervention with a client.

CPT modifiers: adding context to codes

Modifiers are added to Current Procedural Terminology codes to provide additional information. They indicate that a service or procedure performed has been altered, yet the definition of the service hasn’t changed. 

CPT modifiers are added to the end of a CPT code with a hyphen. When using more than one modifier, list the modifier that most affected reimbursement first. The informational modifier can go second. 

Types of CPT modifiers

Modifiers are typically either composed of two digits or two alphanumeric characters. 

  • Two-digit modifiers consist of two numbers. They provide specific information about the service or procedure, such as indicating that a separate and distinct service was performed or that a service was repeated. For example, if a dietitian used CPT code 97803 to get reimbursed for nutrition counseling, but she provided the service by Telehealth, then she would add the modifier code 95 like so: 97803-95.  
  • Alphanumeric modifiers use a combination of letters and numbers. One well-known alphanumeric modifier is “-LT” (left side) and “-RT” (right side), used to specify whether a procedure was performed on the left or right side of the body.
  • HCPCS (Healthcare Common Procedure Coding System) Level II modifiers aren’t technically CPT modifiers. They may include alphanumeric characters to convey specific information about services, equipment, and supplies. We’ll get into the distinction between CPT and HCPCS a little later in this article. 

Where to find current CPT codes

There are a variety of resources that can help with finding current CPT codes. 

The role of medical coders in insurance billing

Although health and wellness practitioners may engage in coding-related tasks when billing for their services, they are not considered full-fledged medical coders. 

Medical coding is a distinct profession with its own formal education, training, and certification requirements. The role specifically involves accurately assigning codes to care services and procedures. 

Challenges faced by medical coders

Medical coding professionals must continuously update their skills and knowledge to ensure accurate coding and compliance with healthcare regulations.

  • Regulations are always changing. Medical coders must keep up with evolving healthcare regulations and changes in payer policies and compliance requirements.
  • Data security and privacy. The Health Insurance Portability and Accountability Act (HIPAA) regulations mandate protecting the security and privacy of patient health information. Medical coders must comply with the Health Insurance Portability and Accountability Act.
  • Audits and compliance. Medical coders are under constant pressure that insurance companies or government agencies can perform a coding audit at any time to ensure accuracy and compliance with billing and coding standards.

Importance of accurate coding for medical procedures

Accurate coding means proper reimbursement. Incorrect codes can lead to underpayment, delayed payments, or even non-payment by insurance companies. 

Although getting paid correctly and on time matters a lot, coding errors can also impact patient care, legal compliance, data quality, research, and healthcare quality improvement. It plays a central role in the integrity and effectiveness of healthcare providers and the system as a whole.

Category I CPT codes are updated annually and effective for use on January 1 of a new calendar year. The updates may include the addition of new codes, revisions to existing codes, and deletions of obsolete codes. Staying current with these changes will help with accurate coding.

Master CPT codes to drive revenue and elevate care

Understanding the ins and outs of CPT codes can be a valuable skill for health and wellness practitioners.

Yes, getting CPT codes right the first time ensures you get reimbursed accurately and on time when dealing with insurance of third-party payers. The codes also represent a standardized way to describe and document the specific healthcare services you provide. Keeping comprehensive records supports continuity of care and can be valuable for tracking patient progress over time.

Learn more about the features built into Practice Better to help automate insurance billing, such as setting up your profile to storing CPT and custom codes into the platform so they are available for use at any time.

Frequently Asked Questions

How do I look up CPT codes?

The Centers for Medicare & Medicaid Services (CMS) offers a free search (CPT code lookup) for RVU (Relative Value Units) for every CPT code. You can also request a CPT/RVU Data File license from the AMA if you want to import codes and descriptions into existing claims and medical billing systems.

How many CPT codes are there?

According to the AMA, the 2023 CPT code set includes 10,969 codes that describe the medical procedures and services available to patients.

What are CPT 4 codes used for?

CPT 4 is another name for the set of CPT codes published by the AMA for reporting medical procedures and services. It includes the Category I, II, and III CPT codes outlined in the above article.

What is the structure of CPT codes?

CPT codes are five digits and are either numeric or alphanumeric. Each has a descriptor to help users understand their purpose. They are organized into three categories: Category I (most commonly used to report services and procedures), Category II (tracking codes for performance management) and Category III (temporary codes for emerging or experimental activities).

[Editor’s note: this post was originally posted on October 17, 2023. It has been updated for comprehensiveness and accuracy.]

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