WeCare Billing LLC Logo

What is HCPCS Codes

Written by   Updated June 25, 2024

Healthcare Common Procedure Coding System HCPCS codes are essential for the medical billing system in the United States. They guarantee that suppliers and payers of healthcare communicate correctly about what was done or given to a patient. If you work in medical coding, billing, or healthcare administration – you know how crucial it is to understand HCPCS codes. This post gives a detailed overview of what they are, how they’re used, and why they matter in medicine.

Introduction to HCPCS Codes

HCPCS codes identify medical services and procedures provided by healthcare providers. It was created as a standardized coding system for reporting medical services performed on patients to promote consistency and accuracy. These codes are divided into levels, “Level I and Level II,” which serve different purposes and represent various medical supplies or treatments.

Understanding HCPCS Level I

HCPCS Level I codes are the same as the CPT codes developed and maintained by the American Medical Association (AMA). These words describe surgeries, diagnoses, or treatments done by health workers. Health professionals use them to report their services and request payment.

Structure of HCPCS Level I Codes

There are five numbers in HCPCS Level I codes. These codes are split into three parts

  • Category I: Codes for almost all medical procedures and services.
  • Category II: Additional tracking codes used to measure performance.
  • Category III: Temporary codes for new technologies, services, and procedures.

Importance of Category I Codes

Category I codes are the most commonly used and include a wide range of procedures, from surgeries to radiological services. These codes ensure that healthcare providers can accurately bill for the services they provide.

Role of Category II and III Codes

Category II codes facilitate data collection for quality improvement and performance measurement. Category III codes enable tracking new and experimental procedures, ensuring that innovative treatments are documented and studied.

An Overview of HCPCS Level II

HCPCS Level II codes help identify medical gear, supplies, and services not covered by standard codes. They include wheelchairs, prosthetics, and ambulance rides. CMS manages these codes.

Structure of HCPCS Level II Codes

HCPCS Level II codes are five characters long and begin with a letter (A-V) followed by four numbers. Each code represents a particular item, such as a service or procedure. The letters found at the start of these codes indicate what type of supply or service they describe—for instance, all those beginning with “A” deal with transportation services. In contrast, those starting with “E” pertain to durable medical equipment.

Examples of HCPCS Level II Codes

  • A0000-A9999: Transportation services, including ambulance services and non-emergency transportation.
  • B0000-B9999: Enteral and parenteral therapy.
  • E0000-E9999: Durable medical equipment.
  • J0000-J9999: Drugs administered other than oral method, such as chemotherapy drugs.

The Evolution of HCPCS Coding

Since its birth, the HCPCS coding system has changed quite a lot. When it was first made in the 1980s, this system was created to keep track of medical services and supplies. It was meant to ensure that there is consistency between different places when billing or reporting them. However, as time went on and new things were invented for healthcare, this coding system had to change as well. The original version became more refined over time. Eventually, it grew more extensive than what anybody could have expected at first glance! Nowadays, with electronic health records and better software, everything about this process has become more accessible.

Key Facts About HCPCS

  • HCPCS Codes Purpose: Medical procedures’ descriptions, services, and product billing.
  • Structure: They are divided into two levels: alphanumeric codes: Level I (CPT codes) and Level II (HCPCS Level II codes).
  • Maintenance: AMA handles CPT codes, while CMS handles HCPCS Level II codes.
  • Usage: Healthcare providers, insurers, and other medical billing process stakeholders utilize the HCPCS codes.

Detailed Structure of HCPCS Level II Codes

Level II of the HCPCS codes begins with a letter (A-V) followed by four digits. Each code denotes a particular product, service, or procedure. The letters at the beginning of the code represent what type of service or supply is being described. For instance, those with an “A” are related to transportation services. In contrast, those starting with an “E” relate to durable medical equipment.

Breakdown of HCPCS Level II Code Ranges

  • A0000-A9999: Transportation services, including ambulance services and non-emergency transportation.
  • B0000-B9999: Enteral and parenteral therapy.
  • C0000-C9999: Temporary codes for use with outpatient prospective payment systems.
  • D0000-D9999: Dental procedures.
  • E0000-E9999: Durable medical equipment.
  • G0000-G9999: Temporary procedures and professional services.
  • H0000-H9999: Rehabilitative services.
  • J0000-J9999: Drugs administered other than oral method, such as chemotherapy drugs.
  • K0000-K9999: Temporary codes for durable medical equipment regional carriers.
  • L0000-L9999: Orthotic and prosthetic procedures.
  • M0000-M9999: Medical services.
  • P0000-P9999: Pathology and laboratory services.
  • Q0000-Q9999: Temporary codes assigned by CMS.
  • R0000-R9999: Diagnostic radiology services.
  • S0000-S9999: Private payer codes.
  • T0000-T9999: State Medicaid agency codes.
  • V0000-V9999: Vision and hearing services.

Application of HCPCS Level II Codes

HCPCS Level II codes have various uses, such as:

  • Billing and Reimbursement: The coders employed by health care practitioners use the codes to bill on their behalf when filling up the demand for reimbursement from different insurance companies like Medicare or Medicaid.
  • Tracking: It is essential to track medical services and supplies utilization. HCPC codes offer a source of meaningful data that drives both public health analysis and policy decisions.
  • Conformity: Accurate coding is a compliance issue that ensures adherence to federal laws and minimizes audits and penalties.

Choosing Between CPT and HCPCS Level II

Physicians and other medical professionals must choose between CPT codes (HCPCS Level I) or HCPCS Level II codes when billing for their services; this is like selecting the appropriate label for what they charge. CPT Codes cover direct activities by doctors, such as check-ups or surgeries. In contrast, other things, such as medical supplies or services from non-doctors, are included under HCPCS Level 2 codes. Healthcare providers must understand when each should be used to ensure appropriate reimbursement is received.

Importance of HCPCS Level II Modifiers

HCPCS Level II modifiers are two-character codes that give more data about a service or procedure. These codes can indicate the context in which services were provided, in fluencing, and the rates at which care is reimbursed. They also help ensure accurate billing and coding by telling claims processors what happened during different treatments. Hence, they know how much to pay doctors for each one.

Keeping Up with HCPCS Level II Updates

The HCPCS coding system constantly changes as new technologies are developed within the medical industry and healthcare regulations are modified. Each year, CMS updates the HCPCS Level II codes, adding fresh ones to the list, removing outdated ones, and changing existing ones when needed. Providers must keep up-to-date with these alterations to bill correctly for services rendered.

Distinguishing CPT from HCPCS

In the health industry, CPT and HCPCS are similar but have different functions. Regarding physician services and procedures such as office visits or surgeries, we mainly utilize CPT codes (HCPCS Level I). In contrast, ambulance rides or other non-physician services and supplies like bandages fall under HCPCS Level II codes. It is crucial to understand these disparities so that payment claims can be filed accurately.

Understanding the Difference Between HCPCS and ICD-10

In medical billing, HCPCS codes and ICD-10 codes have different functions. HCPCS codes were created to describe services, procedures, and products given to patients. On the other hand, ICD-10 codes categorize illnesses, injuries, and any other health condition. These two coding systems work together to fully account for the patient’s medical past and current treatment.

Medicare’s Preference: CPT or HCPCS?

Medicare employs CPT (HCPCS Level I) and HCPCS Level II codes to charge and pay for services. We use HCPCS Level II codes for non-physician supplies, products, and services, while CPT codes are for physician services and procedures.

Common HCPCS Code Mistakes and Avoidance Strategies

Inaccuracies in HCPCS coding can prevent payment, result in denied claims, and even lead to compliance problems. The most common mistakes include using old codes, wrong modifiers, or descriptions that do not match the services or supplies provided. Keeping up with code changes, attending coding training, and using credible coding resources can help you avoid these errors.

Identifying Common Mistakes

  • Outdated Codes: Using codes that are no longer valid.
  • Incorrect Modifiers: Applying modifiers that do not match the service provided.
  • Inaccurate Descriptions: Misdescribing the service or supply.

Strategies for Avoidance

  • Regular Code Audits: Conduct internal audits to identify and correct coding errors.
  • Ongoing Training: Provide continuous education and training for coding staff.
  • Utilize Technology: Implement coding software that includes the latest updates and guidelines.


HCPCS codes are essential for medical billing in the United States. These codes help healthcare providers describe and bill for their services or items effectively. You must understand how HCPCS level I (CPT) and level II codes work to get proper reimbursement and follow healthcare regulations. Correct coding procedures can reduce errors, speed up revenue cycles, and lower the number of denied claims for providers.

Leave a Comment

Your email address will not be published. Required fields are marked *

Scroll to Top