Medical billing and coding professionals translate healthcare services into standardized codes that insurance companies use to process claims and issue payments. The median annual wage for this occupation was $50,250 as of May 2024, according to the Bureau of Labor Statistics, and employment is projected to grow 7 percent from 2024 to 2034, which is faster than average across all occupations.
Though “billing” and “coding” are often grouped together, they represent two distinct sets of tasks. Some employers hire one person to handle both. Others split them into separate roles. Either way, understanding what each side involves will help you decide if this career fits your skills and goals.
What the Coding Side Looks Like
Medical coders spend most of their day inside electronic health records, working through patient charts one by one. For each chart, the coder reviews the doctor’s notes, lab results, imaging reports, and other documentation to understand exactly what services were provided and why. They verify basic details like the patient’s name, date of birth, and date of service before moving on to the core task: assigning standardized codes.
Three coding systems come up constantly in this work:
- ICD-10-CM: A diagnosis code set used by all providers in every healthcare setting. If a patient comes in with pneumonia, the coder selects the specific ICD-10-CM code that matches the type and severity. The system is maintained by the CDC’s National Center for Health Statistics.
- CPT (Current Procedural Terminology): These codes describe the procedures and services a provider performed, from office visits to surgeries. The American Medical Association maintains the CPT code set, which is technically the first level of a broader system called HCPCS.
- HCPCS Level II: A separate set of codes covering products and services not included in CPT, such as durable medical equipment, prosthetics, ambulance services, and certain drugs.
Accuracy matters enormously. A wrong code can trigger a claim denial, delay payment, or even flag the provider for an audit. Coders double-check their work before submitting and ask questions when documentation seems unclear or incomplete. They regularly communicate with physicians and other departments to clarify what happened during a patient encounter so the codes reflect reality.
What the Billing Side Looks Like
Once codes are assigned, the billing side takes over. Medical billers package those codes into claims and submit them to insurance companies or government payers like Medicare and Medicaid. Their responsibilities include verifying patient insurance coverage before or after a visit, preparing and transmitting claims electronically, and tracking each claim through the payment cycle.
When a claim is denied or partially paid, the biller investigates. Sometimes the issue is a coding error that needs to be corrected. Other times the insurer needs additional documentation. Billers handle appeals, resubmissions, and follow-ups until the claim is resolved. They also generate patient statements for any remaining balance and manage payment collections. In smaller practices, the same person coding the charts is also handling these billing tasks.
Compliance and Privacy Responsibilities
Both coders and billers work with protected health information, which means HIPAA (the federal health privacy law) governs nearly everything they do. You cannot share patient details with anyone who is not authorized to see them, and you are expected to keep digital records secure and avoid discussing patient information outside of work.
Compliance also extends to the codes themselves. Submitting inaccurate codes, whether intentionally or through carelessness, can constitute fraud. Taking time to verify codes, following official coding guidelines, and flagging anything that looks questionable are all part of the job.
Where You Can Work
Medical billing and coding roles exist across nearly every corner of healthcare. Hospitals, physician practices, outpatient clinics, insurance companies, government health agencies, health IT vendors, and third-party coding companies all hire for these positions.
Remote work is common. An AAPC salary survey found that 51 percent of medical coders work from home, enabled by technology that allows HIPAA-compliant remote access to electronic health records. Many employers still require some experience before approving remote arrangements, but the option is widely available once you have a track record.
Certifications That Employers Look For
Most employers prefer or require a professional certification. Two organizations dominate the credentialing landscape: AAPC and AHIMA.
AAPC offers the Certified Professional Coder (CPC) credential, which is one of the most widely recognized entry-level certifications. It focuses on outpatient and physician-office coding. AHIMA offers the Certified Coding Specialist (CCS), which covers both inpatient and outpatient coding and is especially valued in hospital settings. The CCS exam includes 97 scored questions, takes up to four hours, and costs $299 for AHIMA members or $399 for non-members.
To sit for the CCS, AHIMA recommends (but does not strictly require) that candidates either complete coursework in anatomy, physiology, pathophysiology, pharmacology, medical terminology, and coding methodology plus one year of hands-on coding experience, or have at least two years of coding experience applying codes directly. Holding a related credential from another organization plus one year of experience is another accepted path.
Many community colleges, vocational schools, and online programs offer certificate or associate degree programs specifically designed to prepare you for these exams. Programs typically cover medical terminology, anatomy, the major code sets, health information management, and billing software.
Skills That Set You Apart
Beyond certifications, this job demands a specific blend of abilities. You need strong attention to detail because a single misplaced digit in a code can change the meaning entirely. Familiarity with medical terminology and basic anatomy helps you read clinical documentation without getting lost. Comfort working in electronic health record systems and billing software is essential since nearly all work is digital.
Communication skills matter more than you might expect. Coders regularly reach out to providers to ask about unclear documentation, and billers spend time on the phone or email with insurance representatives resolving claim issues. The ability to read complex documents carefully and ask precise questions keeps the revenue cycle moving.
Typical Salary and Growth
The BLS reports a median annual wage of $50,250 for medical records specialists as of May 2024. Pay varies based on your certification level, years of experience, employer type, and whether you specialize in a high-demand area like risk adjustment coding or surgical coding. Coders working in hospital inpatient settings or for large coding outsource companies often earn more than those in small outpatient offices.
The 7 percent projected employment growth from 2024 to 2034 reflects a healthcare industry that continues expanding as the population ages and regulatory requirements around documentation and data grow more complex. Specializing in a coding niche or earning advanced credentials can accelerate both your earning potential and job security over time.