What Does a Medical Coder Do?
A look at the work behind every medical bill: chart reviews, classification systems, coding software and the certifications that open the first door.
By Priya Nandakumar · Oct 26, 2026 · 8 min read
A medical coder reads clinical documentation and translates it into standardized codes. According to the U.S. Bureau of Labor Statistics (2025), coders assign the diagnosis and procedure codes used for patient care records, population health statistics and billing, and act as a liaison between healthcare providers and billing offices.
The work sits inside the broader occupation BLS calls medical records specialists, which also covers reviewing records for timeliness, completeness and accuracy, retrieving records for insurance reimbursement and data analysis, recording data electronically, and protecting patient confidentiality (U.S. Bureau of Labor Statistics, 2025).
A Day in the Life
You start by opening your work queue in the electronic health record. Depending on the employer, that is usually a system such as Epic Systems, eClinicalWorks EHR software or MEDITECH software (O*NET OnLine, U.S. Department of Labor). The queue holds accounts waiting to be coded: yesterday's clinic visits, same-day surgeries, emergency department charts or inpatient discharges, depending on which service line you are assigned.
For each account you read the documentation before you touch a code. You check the record for timeliness, completeness and accuracy (U.S. Bureau of Labor Statistics, 2025) — is there a signed note, an operative report, a pathology result, a discharge summary? If the physician documented "mass" in one place and a specific diagnosis in another, you cannot guess. You write a provider query: a neutral, non-leading question sent back through the EHR asking the clinician to clarify what the record supports.
Then you code. You assign ICD-10-CM diagnosis codes, CPT procedure codes and HCPCS Level II codes for supplies, drugs and certain services, the code sets the CPC credential is built around (AAPC). Many coders work inside categorization software such as 3M Encoder or American Medical Association CodeManager (O*NET OnLine, U.S. Department of Labor), which prompts for the detail a code requires — laterality, encounter type, approach, number of lesions removed. You add modifiers where the documentation supports them and sequence the principal diagnosis correctly.
Mid-day often brings edits and denials. A claim has stopped at a payer edit, or a bundling rule flagged two procedures billed together. You pull the chart again, decide whether the original coding stands, and either defend it with a documentation reference or correct it and re-release the account to billing. That back-and-forth is the liaison role between providers and the billing office (U.S. Bureau of Labor Statistics, 2025).
The rest of the day may include release-of-information requests, record retrieval for an internal audit or a data analysis request, and an accuracy review of your own coded accounts. Throughout, you are handling protected patient information, so access logs, minimum-necessary access and confidentiality rules shape what you can open and share (U.S. Bureau of Labor Statistics, 2025). There is no bedside work — it is a computer job from start to finish.
Who Thrives in This Career
- If you're good at reading closely and noticing what is missing, you'll likely enjoy reviewing records for timeliness, completeness and accuracy before any code is assigned.
- If you're good at following rules exactly as written, you'll likely enjoy applying ICD-10-CM, CPT and HCPCS Level II conventions and sequencing rules rather than improvising.
- If you're good at asking precise, neutral questions, you'll likely enjoy writing provider queries when documentation and diagnosis do not line up.
- If you're good at puzzle-solving under constraints, you'll likely enjoy working denials and payer edits, where you have to decide whether the original code stands.
- If you're good at sustained solo concentration, you'll likely enjoy clearing a coding queue at a computer, since the occupation involves no direct hands-on patient care (U.S. Bureau of Labor Statistics, 2025).
- If you're good at learning software quickly, you'll likely enjoy moving between an EHR such as Epic Systems, eClinicalWorks or MEDITECH and an encoder tool (O*NET OnLine, U.S. Department of Labor).
- If you're good at keeping confidences and documenting what you did, you'll likely enjoy the release-of-information and confidentiality side of the role.
- If you're good at studying for exams, you'll likely enjoy the credentialing path, which starts with a timed multiple-choice test rather than an interview-only hiring process.
Salary, Outlook, and Requirements
Figures for this occupation are published under the title "Medical Records Specialists." Check the current entry in the BLS Occupational Outlook Handbook for the published numbers, as they are updated on a set schedule.
| Metric | Figure | Source/Year |
|---|---|---|
| Median annual wage | Published figure; look it up in the Occupational Outlook Handbook entry for Medical Records Specialists | U.S. Bureau of Labor Statistics, 2025 |
| Typical entry-level education | Stated in the same Handbook entry; employers set their own minimum above it | U.S. Bureau of Labor Statistics, 2025 |
| Projected job growth, 2025–35 | Published percentage change for the decade; see the Job Outlook tab | U.S. Bureau of Labor Statistics, 2025 |
| Total jobs held | Published employment count for 2025 | U.S. Bureau of Labor Statistics, 2025 |
| Projected annual openings | Published average openings per year over the decade | U.S. Bureau of Labor Statistics, 2025 |
| Largest employers | Hospitals (state, local and private), then offices of physicians | U.S. Bureau of Labor Statistics, 2025 |
| Certification expectation | Employers may prefer certified applicants, or expect certification shortly after hire | U.S. Bureau of Labor Statistics, 2025 |
| Preparation level | O*NET Job Zone rating for this occupation | O*NET OnLine, U.S. Department of Labor |
Pay structure is usually hourly for entry-level hospital and clinic roles and salaried for senior or specialty coding positions; some remote and contract coders are paid per chart or per encounter, and productivity and accuracy targets are common. Rates vary by state, metro area and employer type, so compare the national median against your state's figure in the BLS Occupational Employment and Wage Statistics data before setting expectations.
How to Get Started
- Build the foundation: medical terminology, anatomy and physiology, pathophysiology, and the structure of ICD-10-CM, CPT and HCPCS Level II. These are the code sets the CPC credential tests (AAPC), and you cannot code from documentation you cannot read.
- Choose a training route that matches the credential you want. Completing an AHIMA-approved coding program (PCAP Program) satisfies one of the preparation requirements for the Certified Coding Associate (CCA) exam; the alternative route is six months of coding experience directly applying codes (AHIMA).
- Sit a credentialing exam. The Certified Professional Coder (CPC) exam from AAPC is 100 multiple-choice questions and validates knowledge of coding across outpatient and physician services (AAPC). The CCA from AHIMA is the other common entry point.
- Understand the apprentice designation. If you pass the CPC exam before meeting AAPC's experience requirements, you hold the CPC-A credential; the apprentice "A" is removed once AAPC verifies two years of qualifying coding experience (Mometrix, citing AAPC).
- Apply for entry-level roles under the titles employers actually post. Reported job titles for this occupation include Coder, Medical Coder, Medical Records Clerk, Health Information Clerk, Health Information Technician and RHIT (O*NET OnLine, U.S. Department of Labor). Search hospital system career portals directly, since hospitals are the largest employer, then offices of physicians (U.S. Bureau of Labor Statistics, 2025).
- Get hands-on with a real EHR. Ask in interviews which system the department uses — Epic Systems, eClinicalWorks or MEDITECH are among those named for this occupation — and whether coders work in an encoder such as 3M Encoder (O*NET OnLine, U.S. Department of Labor).
- Plan the next credential. The Certified Coding Specialist (CCS) exam is designed for professionals experienced in coding inpatient and outpatient records and is a natural progression for those holding the CCA (AHIMA). The RHIT credential is the route if you want to move toward health information management rather than coding alone.
Frequently asked questions
Can medical coders work from home?
Remote coding is common, but it is set by the employer, not the occupation. Many hospitals and physician groups start new coders onsite so accuracy can be reviewed, then allow remote work once productivity targets are met. Some contract and vendor roles are remote from day one. State rules on payroll, licensure of the facility and data security can also affect where an employer will let you work.
Is medical coding the same as medical billing?
They are separate steps in the same revenue cycle. Coding is the translation of clinical documentation into standardized codes. Billing takes those codes, builds and submits the claim, posts payments and chases balances with payers and patients. Small physician offices often combine both into one role; hospitals usually split them into different departments with different credentials and different software. Ask which version a posting means.
How long does it take to become a medical coder?
It depends on the route. Focused certificate programs typically run several months to about a year of study; associate-level health information programs take longer. Add exam preparation time, and then the experience period required before an apprentice designation is lifted. People already working in a clinic or registration role sometimes move across faster because they are familiar with documentation and the EHR.
Do you need a state license to work as a medical coder?
Coding credentials are awarded by professional associations such as AAPC and AHIMA rather than by state licensing boards, which is why requirements are written into job postings instead of state statutes. Employer expectations vary widely by setting and by state, and some facilities require a specific credential for inpatient work. Check the exact credential named in the posting before you pay for an exam.
What kinds of settings hire coders besides hospitals?
Beyond hospitals and physician offices, coders work for outpatient surgery centers, long-term care and rehabilitation facilities, home health agencies, insurance companies reviewing claims, coding vendors and consulting firms, and research or registry teams that need coded data for analysis. Specialty focus matters: a coder who knows orthopedics or cardiology documentation is valued differently from a generalist, and some employers test on specialty cases.
Sources
- U.S. Bureau of Labor Statistics — Medical Records Specialists : Occupational Outlook Handbook (2025)
- O*NET OnLine / U.S. Department of Labor — 29-2072.00 - Medical Records Specialists
Written by
Priya Nandakumar
Priya covers the texture of offices, remote teams, and the spaces in between — what makes a workplace bearable or unbearable long after the paycheck stops mattering. She likes stories where nobody is the villain.
