By Qamar S, 15 years in US medical billing · Last reviewed September 26, 2026
Medical coders read a provider’s notes and assign standard codes (CPT, ICD-10-CM and HCPCS) for every diagnosis and service. Medical billers take those codes, send claims to insurance companies and patients, and follow up until the bill is paid. The two jobs work side by side, and many people, especially in small practices, do both.
In one line: coding answers “what was done and why,” and billing answers “who pays, how much, and did we get paid.” If you like detail and research, lean toward coding. If you like problem-solving, phone calls and follow-up, lean toward billing.
Side by side
| Medical coding | Medical billing | |
|---|---|---|
| Main job | Assign codes from clinical documentation | Create claims, post payments, fix denials, bill patients |
| Daily tools | Code books or encoder, EHR notes | Practice management software, payer portals, phone |
| Key skills | Anatomy, terminology, coding guidelines | Insurance rules, denials, appeals, communication |
| Common certification | CPC (AAPC), CCS (AHIMA) | CPB (AAPC) |
| Works with | Providers, auditors | Insurers, patients, front desk |
| Remote options | Very common for experienced coders | Common, especially AR and denial roles |
What a medical coder does all day
- Reads visit notes, operative reports and test results
- Assigns ICD-10-CM codes for diagnoses and CPT or HCPCS codes for services
- Adds modifiers when a service needs extra detail
- Queries the provider when documentation is unclear
- Follows coding guidelines to keep claims compliant
What a medical biller does all day
- Checks patient insurance and eligibility
- Creates and sends claims (CMS-1500 for professional services, UB-04 for hospitals)
- Posts insurance and patient payments from EOBs and remittances
- Works denials: finds the reason, fixes it and resubmits or appeals
- Answers patient billing questions and sets up payment plans
From 15 years in billing: the best billers understand coding, and the best coders understand billing. A coder who knows why claims deny writes cleaner codes; a biller who can read a code catches problems before the claim goes out. Whichever you start with, learn the basics of the other side. It makes you far more hireable.
Pay and job outlook
The US Bureau of Labor Statistics groups billing and coding roles under medical records specialists, with a median pay of $51,140 (May 2025), about 200,700 jobs and 8% projected growth from 2025 to 2035, which BLS calls much faster than average. Certified coders and billers who handle denials or specialty work often earn more than entry-level data entry roles.
Certifications: CPC vs CPB
| CPC (Certified Professional Coder) | CPB (Certified Professional Biller) | |
|---|---|---|
| Offered by | AAPC | AAPC |
| Focus | Outpatient and physician coding | The full billing and claims cycle |
| Best for | Coding roles and coding-heavy jobs | Billing, AR and revenue cycle roles |
See our CPC exam guide and our certifications compared guide for costs and exam details.
Which should you choose?
| If you… | Consider |
|---|---|
| Enjoy anatomy, rules and quiet focused work | Medical coding |
| Like solving problems and talking to people | Medical billing |
| Want the fastest route to a first job | Billing (front desk, payment posting) |
| Want the most remote-friendly long-term path | Coding, after gaining experience |
| Work (or want to work) at a small practice | Learn both |
Ready to look for work? Read our guide to remote medical billing jobs, including the scam warning signs, or ask questions in the Medical Billing Careers community.
Frequently asked questions
Is medical coding harder than medical billing?
Coding usually needs more technical knowledge up front (anatomy, terminology and guidelines). Billing needs strong knowledge of insurance rules and persistence with follow-up. Both take practice to do well.
Can one person do both billing and coding?
Yes. In small practices, one person often codes, bills and handles payments. Larger organizations usually split the roles.
Do I need a degree?
Usually not. BLS says the typical entry education is a postsecondary nondegree award, and many employers value a certification plus experience.
Which pays more?
It depends on the employer and your experience. Certified coders and billers who handle specialty coding, audits or complex denials tend to earn more.
Sources
- US Bureau of Labor Statistics: Medical Records Specialists
- AAPC: Certified Professional Biller (CPB)
- AAPC: Certified Professional Coder (CPC)
This guide is educational and is not legal, financial or insurance advice. See our Disclaimer.