25 questions on the CPT 20000 series — arthroscopy, fracture care, joint and trigger point injections, hardware removal, arthroplasty, bone grafts, debridement and the modifiers that go with them. Most are full vignettes where you pick the code. Free, untimed, with a worked explanation for every answer.
Not affiliated with AAPC®. For educational purposes only.
The Musculoskeletal System is the largest surgery subsection in CPT, and on the CPC exam it carries more questions than any other single body system. It is also where the exam stops testing definitions and starts testing whether you can read an operative note and land on one code. Knowing that 29880 is a meniscectomy is not the skill being measured. Knowing that 29880 is used when both the medial and lateral menisci are addressed, and 29881 when only one is, is.
So this quiz is built as vignettes. Eighteen of the twenty-five questions give you a short synthetic operative note and ask for the code — the same shape as the real exam. The remaining seven test the guideline rules that decide those codes: the global surgical package, the separate-procedure convention, and the modifiers.
Eleven sub-topics, weighted towards the areas that produce the most errors:
Every vignette in this quiz has at least one distractor that matches a word in the note. That is deliberate, because the exam does the same thing. The habit that survives exam day is: read the note, decide the approach and the anatomy first, then open the CPT manual and read the full code descriptor including any parenthetical notes underneath it. Choosing from the index alone is the single most common way to lose a mark here.
Mark your CPT Professional edition before exam day. Tabs on the 20000 series, and pencil notes next to the paired codes that differ by one word — medial or lateral against medial and lateral, with manipulation against without — save more time than anything else you can do to the book.
Every question carries a worked explanation that says why the wrong options are wrong, not just why the right one is right. A correct answer reached by elimination is worth revisiting — on the real exam the same code pair will appear with different distractors, and elimination will not be available.
The sub-topic breakdown on your score card is the useful output. A sub-topic below seventy per cent is a reading assignment, not a reason to retake the quiz immediately — retaking it straight away mostly tests whether you remember these twenty-five items. Read the relevant CPT guidelines, leave it a few days, then come back.
Note on sources: code descriptors, guideline text and parenthetical instructions are as published by the AMA in the current CPT Professional edition. Always verify against your own current-year manual — the exam is taken with the edition in effect on your test date.
More practice: E/M chapter quiz · full CPC mock exams · general practice quiz · study articles
Yes. All 25 questions, the sub-topic score breakdown and the worked explanation for every answer are free, with no sign-up and no payment.
The Musculoskeletal System subsection. It opens with general procedures such as injections, bone grafts and wound exploration, then runs head to toe by anatomic site, and closes with the application of casts and strapping and the endoscopy and arthroscopy codes.
Both are surgical knee arthroscopy with meniscectomy. 29880 is reported when the medial AND lateral menisci are addressed; 29881 when the medial OR lateral meniscus is addressed. Read the full descriptors in your CPT Professional edition before you choose.
Yes, and you should. The CPC exam is open book with an approved CPT Professional edition, and most of these questions are operative-note vignettes where you pick the code, so practising with the book in hand builds the look-up speed the exam actually measures.
Yes. The 25 questions are shuffled on every attempt, so a retake is not a memory test of the same sequence. Your answers are saved in your own browser for 24 hours, so a refresh or a stray back button does not lose them.