A medical coder translates the diagnoses, procedures and services documented in a patient's record into standardized codes that drive billing, patient care and health statistics.
The Bureau of Labor Statistics counts coders inside its medical records specialists occupation, and they are hired across hospitals, physician practices, billing companies and insurers.
This guide covers what the work involves, where coders work, remote coding, specialties, training, certification, pay and the career path.
What is medical coding?
Medical coding is the work of turning clinical documentation into standardized codes.
After a patient visit or stay, the documentation it produced — diagnoses, procedures and services — has to become the coded data the health care system runs on.
BLS describes the coder's part in that directly: medical coders assign the diagnosis and procedure codes for patient care, population health statistics and billing purposes.
The job sits inside a federal occupation BLS calls medical records specialists — workers who compile, process and maintain patient files and may classify and enter patients' medical information into the health care industry's numerical coding system.
Coders are the specialists who do that classifying.
BLS calls medical records specialist work one of the few health-related occupations with no direct hands-on patient care.
The work runs on records and code sets rather than patient contact.
What does a medical coder do?
Day to day, a coder reads the documentation a visit or stay produced and assigns the codes that describe it.
BLS lists reviewing patient records for timeliness, completeness and accuracy, and using classification systems to assign clinical codes for diagnoses, procedures and services, among the occupation's typical duties.
Coders also sit between the clinical and financial sides of the organization.
BLS says medical coders work as the liaison between health care providers and billing offices, and that specialists meet with health care workers such as registered nurses to clarify diagnoses or get additional information.
Titles vary.
O*NET's sample of reported job titles for medical records specialists includes Coder, Medical Coder, Health Information Technician, Health Information Specialist, HIM Clerk and Medical Records Clerk.
Whether a posting says medical coder or medical coding specialist, the core work is the same: read the record, assign the codes, and be able to defend them.
You can see how employers phrase all of this in live medical coder jobs.
Professional-fee vs facility coding
A single hospital encounter can generate two coding workstreams: one for the facility and its resources, and one for the professional clinician's work.
The two sides are distinct enough that the credential bodies validate each with its own certifications.
AAPC's credential map shows the split.
AAPC says the CPC validates comprehensive knowledge of medical coding across outpatient and physician services — the professional-fee side.
Its COC validates outpatient hospital and facility coding, including same-day surgeries, emergency department visits and hospital outpatient clinic services, and its CIC validates inpatient hospital coding.
AAPC names the CPC, COC, CIC and CRC as its four main core coding certifications, with the CPB for billers.
AHIMA's CCS is its hospital-side credential: AHIMA describes the CCS as covering mastery-level coding generally in the hospital setting, and reported 36,925 certified CCS professionals as of December 31, 2025.
Where do medical coders work?
Hospitals led BLS's 2025 employer breakdown for medical records specialists at 28% of employment, followed by offices of physicians at 18% and professional, scientific and technical services at 10%.
Administrative and support services employed another 8% and management of companies 7%.
The occupation also includes records staff who do not code, so read that mix as the field's shape rather than coder-only employment.
AAPC's list of employer types runs past the hospital and the practice: ambulatory surgery centers, walk-in clinics, long-term care, home health agencies, hospice, telehealth companies, labs and imaging centers.
AAPC also names employers where no patients come through the door: software and DME vendors, insurance companies, government agencies, educational institutions, billing companies, risk adjustment vendors, health care consulting firms and some law offices.
BLS says most medical records specialists work full time, and in always-open facilities such as hospitals they may work shifts that include nights or weekends.
Can medical coders work from home?
Yes — and the clearest number comes from AAPC's 2025 salary survey: 64.8% of respondents reported working fully remote, 19.8% fully on-site and 15.4% hybrid.
Read that number for what it is — a share of AAPC's survey respondents, who are self-selected and mostly AAPC members.
It is not a count of job postings, and our research found no neutral source for what share of postings are remote.
Treat the survey as a picture of working coders rather than of the job market.
Whether any single role is remote depends on the employer, the setting and the employer's own security and scheduling policies.
Which specialties can coders choose?
Specializing is a direction rather than an entry requirement.
One axis is the service line.
As of October 13, 2026, AAPC's certifications catalog listed specialty credentials for ambulatory surgery centers, anesthesia and pain management, cardiology, cardiovascular and thoracic surgery, emergency department, evaluation and management, family practice, gastroenterology, general surgery, and hematology/oncology.
The list continues through interventional radiology/cardiovascular, OB/GYN, ophthalmology, orthopaedic surgery, dermatology, pediatrics, rheumatology and urology.
AAPC describes its orthopaedic surgery credential, the COSC, as aimed at experienced CPC-certified coders seeking to specialize in orthopaedic surgery coding.
The other axis is setting and payment model: AAPC validates inpatient facility coding with the CIC, outpatient hospital and facility coding — emergency department visits included — with the COC, and risk adjustment coding with the CRC.
Check the credential catalog before you plan
How do you become a medical coder?
The short version: train in the code sets and guidelines, certify, then land a first coding job.
BLS's entry profile says medical records specialists typically need a postsecondary certificate to enter the occupation, although some qualify with a high school diploma and others need an associate's or bachelor's degree.
Certification sits alongside that training.
BLS says certification may be required or preferred, and that employers may prefer to hire certified applicants or expect certification shortly after being hired.
AAPC says its certification carries the most weight with employers and does not require an associate or bachelor's degree — AAPC's claim about AAPC's own credential, so weigh it accordingly.
AAPC's core coding credential for professional-fee work is the CPC, which ran 100 questions in four hours and cost $425 for one attempt or $499 for two as of October 13, 2026.
AAPC says most people complete its CPC coursework and pass the exam in 4 to 8 months.
Keeping the credential takes annual AAPC membership plus 36 CEUs every two years.
AHIMA's Certified Coding Associate (CCA) requires a high school diploma to sit for the exam.
Confirm exam details with the credentialing body
How much do medical coders make?
BLS has no medical-coder occupation.
Coders are counted inside medical records specialists (SOC 29-2072), which also includes records staff who do not code, so read these figures as the closest available group rather than coder-specific pay.
The median annual wage for medical records specialists was $51,140 in May 2025.
The lowest-paid 10% earned less than $37,000 and the highest-paid 10% earned more than $81,150.
Pay moves with the employer type.
May 2025 medians for the occupation ran $46,800 in professional, scientific and technical services, $47,120 in offices of physicians, $49,490 in administrative and support services, $59,120 in hospitals and $60,980 in management of companies.
AAPC's 2026 salary report put certified respondents at an average of $67,260 against $55,721 for non-certified, 20.7% more.
That is a survey of self-selected, mostly AAPC-member respondents — a different measure from the BLS median, and the two should not be mixed.
The state-by-state BLS tables sit on the medical coder salary page.
What's the career path for medical coders?
The outlook is strong on BLS's own numbers: employment of medical records specialists is projected to grow 8% from 2025 to 2035, much faster than the average for all occupations, with about 14,000 openings a year.
Many of those openings come from replacing workers who change occupations or retire.
BLS's Employment Projections table shows the occupation going from 200,700 jobs in 2025 to 216,300 in 2035, a 7.8% increase, with a postsecondary nondegree award as typical entry education.
Behind the growth, BLS expects more specialists to be needed to translate patient information and services into standardized codes for insurance reimbursement, citing an aging population and more chronic conditions.
BLS's outlook also carries a caveat: increasing adoption of AI-powered solutions that make the medical coding process more efficient may affect demand for these workers.
From a first coding job, the ladder runs toward depth and then scope — a setting or specialty, then audit, clinical documentation integrity or quality work, then lead and management roles.
BLS notes medical records specialists may advance to health information technologist or medical and health services manager roles after completing a higher certification program or a health information technology degree.
For the employment, wage and projection numbers gathered in one place, see the medical billing and coding industry statistics page.
Career information, not coding, billing-compliance, legal or tax advice; confirm exam, certification and CEU details with AAPC or AHIMA, and outlook and pay data with the BLS.