Medical Coding Certification: CPC vs CCS vs CCA Explained
Medical coding certification is a credential you earn by passing an exam from one of two national bodies: AAPC or AHIMA. AAPC issues the CPC (Certified Professional Coder), built around physician-office and outpatient coding. AHIMA issues the CCA (Certified Coding Associate), an entry-level credential, and the CCS (Certified Coding Specialist), a more advanced credential built around hospital and inpatient coding. None of the three requires a college degree, and all three are earned by passing a proctored, multiple-choice exam.
People land on this question two ways: they’re brand new to the field and don’t know which letters to chase, or they already hold one credential and are deciding whether a second one is worth the money. The honest answer depends less on which exam is “harder” and more on where you plan to work. A physician’s office wants a CPC. A hospital health information department leans CCS. A first job with no coding background at all often starts with the CCA.
(CPC Prep is not affiliated with or endorsed by AAPC, AHIMA, or Pearson VUE. We use these credential names the way the field does, to describe the exams, not to claim we administer them.)
The CPC exam gets its own deep dive on this site since it’s what CPC Prep is built around. This article is the map of where it sits relative to the other two.
What does each credential actually certify?
The CPC certifies that a candidate can accurately assign CPT, ICD-10-CM, and HCPCS Level II codes for services performed in a physician’s office or outpatient facility, along with modifier use and coding-guideline compliance. The CCA certifies foundational coding competency across both hospital and physician-based settings, without specializing in either. The CCS certifies advanced proficiency specifically in hospital inpatient and outpatient coding, including more complex diagnosis and procedure sequencing than either of the other two exams tests.
None of these credentials overlaps completely. A CPC who moves into a hospital coding role often finds gaps the CPC exam never covered, and a CCS working in a physician’s office runs into the reverse problem. That’s why some coders eventually hold more than one.
Who is each credential actually for?
If you’re starting from zero with no coding background, the CCA is the gentlest entry point: it assumes less prior training and is priced lower than the other two. If you already know you want to work in a physician’s office, medical group, or specialty clinic, skip straight to the CPC. If your target is a hospital health information department or inpatient coding role, the CCS is the credential employers in that setting actually ask for.
| Credential | Issuing body | Setting focus | Entry-level friendly |
|---|---|---|---|
| CPC | AAPC | Physician office / outpatient | Yes, no experience required to sit |
| CCA | AHIMA | General, both settings | Yes, explicitly entry-level |
| CCS | AHIMA | Hospital inpatient / outpatient | No, assumes prior coding coursework |
How do the exams themselves compare?
The CPC runs 100 multiple-choice questions over a 4-hour session split into two parts, open-book with approved current-year CPT, ICD-10-CM, and HCPCS Level II manuals, and requires a 70% score to pass (AAPC certification exam support, accessed 2026-07-18). The CCA runs 105 questions (90 scored, 15 unscored pretest items) in a 2-hour window with no ability to skip and return to a question. The CCS runs 107 questions (10 unscored) in a 4-hour window. All three are proctored, either in person or through a remote-proctoring service, and none of them lets you bring in outside study guides or a phone.
None of these exams requires a degree. What they do require, in practice, is a real study plan, because “open book” does not mean “easy.” A candidate who hasn’t built familiarity with how the code sets are organized will burn most of a 100-question exam just flipping pages.
Is one exam harder than the others?
Difficulty is a function of setting complexity more than raw question count. Hospital inpatient coding, the CCS’s domain, generally involves more code sequencing rules and more documentation review per case than physician-office coding, so candidates and instructors commonly describe CCS as the toughest of the three to prepare for. The CCA, by design, tests less depth per topic. The CPC sits in the middle: broad coverage across many specialties (surgery, radiology, anesthesia, evaluation and management), but confined to the outpatient setting.
Do these credentials expire?
Yes, all three require ongoing continuing education to stay active. AAPC’s CPC requires 36 continuing education units (CEUs) every two years plus current AAPC membership (AAPC certification page, accessed 2026-07-18). AHIMA’s CCA and CCS have their own separate CEU cycles under AHIMA membership. None of these is a one-time credential; all three are a standing commitment to keep learning as code sets update annually.
Can you hold more than one?
Yes, and it’s common. A coder who starts with a CCA to break into the field, then adds a CPC once they land a physician-office job, ends up with a resume that covers both settings. Each exam and each membership is billed separately though, so stacking credentials is a real cost decision, not just a study-time decision.
Run a few practice questions on the free CPC practice exam to see whether the outpatient/physician-office content actually matches what you already know, and grab the free CPC Exam Prep Cheat Sheet before you commit study hours to one path over another.
FAQ
Is CPC better than CCS? Neither is “better.” CPC is built for physician-office and outpatient coding; CCS is built for hospital inpatient coding. The right one depends on where you want to work, not which exam has a harder reputation.
Can I get CCA and CPC at the same time? You can hold both, but you sit for them as two separate exams under two separate memberships (AHIMA for CCA, AAPC for CPC). There’s no combined exam.
Do I need a degree for any of these? No. None of the three requires a college degree. An associate’s degree is sometimes recommended for CPC, but it is not a requirement to sit for the exam.
Which certification should a total beginner start with? Most people with zero coding background start with the CCA, since it assumes the least prior training. If you already know you want physician-office work specifically, the CPC is a reasonable first move too.
Do all three use the same code books? They draw from the same underlying code sets, CPT, ICD-10-CM, and HCPCS Level II, but the emphasis differs by setting. CPC leans heavily on CPT and outpatient guidelines; CCS leans more on ICD-10-CM sequencing and inpatient-specific coding rules.
Bottom line: CPC, CCA, and CCS are not competing versions of the same test. They’re built for three different coding settings, and the one worth your time is whichever setting you’re actually trying to work in.