CCS Exam Prep: Medical Coding

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About this app

Prepare for the AHIMA Certified Coding Specialist (CCS) exam at a coder's desk. Work mock inpatient records, pick the principal diagnosis, set POA and name the guideline, then drill all five domains of AHIMA's current exam content outline.

INPATIENT ABSTRACT DRILLS
Each chart is a short mock record: ED note, H&P, progress note, discharge summary. Choose the principal diagnosis, make the sequencing call, set every POA indicator and pick the guideline that decides it. An edit report grades each entry and explains why, with CC and MCC tags from the FY 2026 tables. Categories run from sepsis, chronic combinations and complications to drugs, neoplasms, uncertain diagnoses and observation or outpatient surgery admissions.

CASE MIX AND DRG BENCH (FREE)
Case mix index, DRG payment from relative weight and base rate, the change when a CC or MCC moves the DRG, and coder accuracy and productivity. Exam practice only, with the working shown.

YOUR WORK QUEUE
Start each visit from a queue: your next scored set, your weakest domain, today's abstract and the questions you missed. A readout shows your accuracy in each domain, and a countdown runs to your exam date.

STUDY EVERY DOMAIN
• Scored ten-question sets with results by domain and review of misses
• Multiple choice, true/false, flashcards and term matching
• Inpatient, outpatient and emergency department scenarios
• A searchable coding glossary
• Code Rules: Official Guidelines sections, ICD-10-PCS root operations, POA, sequencing and DRG formulas
• The exam outline with domain weights and official links

Topics follow the AHIMA outline effective 05/01/2024: Coding Knowledge and Skills, Coding Documentation, Provider Queries, Regulatory Compliance and Information Technologies. They include ICD-10-CM and ICD-10-PCS rules, modifiers, NCCI edits, MS-DRG and APC payment, compliant queries, HACs and PSIs, HIPAA, HITECH and computer-assisted coding. Every ICD-10 code cited was checked against CMS's FY 2026 and FY 2027 files. CPT descriptors are not reproduced.

FREE AND PREMIUM
A full scored set, the first abstract in every category, a sample of every study mode and the complete Bench are free. Premium unlocks everything, by subscription or a one-time lifetime purchase.

Official sources (also linked in the app):
- AHIMA: CCS certification and exam details: https://www.ahima.org/certification-careers/certifications-overview/ccs/
- AHIMA: https://www.ahima.org/media/ecklaulp/css-exam-content-outline-1-1.pdf
- AHIMA: CCS 2026 required code books (PDF): https://www.ahima.org/media/4vxpzr3q/ccs_2026_codebook_list.pdf
- CMS: https://www.cms.gov/medicare/coding-billing/icd-10-codes
- CMS: https://www.cms.gov/files/document/fy-2026-icd-10-cm-coding-guidelines.pdf
- CMS: https://www.cms.gov/medicare/payment/prospective-payment-systems/acute-inpatient-pps/fy-2026-ipps-final-rule-home-page
- CMS: Hospital-Acquired Conditions (U.S. Government): https://www.cms.gov/medicare/payment/fee-for-service-providers/hospital-aquired-conditions-hac
- CMS: https://www.cms.gov/medicare/coding-billing/national-correct-coding-initiative-ncci-edits
- HHS: HIPAA for professionals (U.S. Government): https://www.hhs.gov/hipaa/for-professionals/index.html
Always check AHIMA for current exam rules and required code books.

Study material for exam preparation only. It is not medical advice, is not for patient care, and is not coding, billing or legal advice for a real claim. Records and dollar figures are mock examples.

This app is an independent study aid. It is not affiliated with, endorsed by or sponsored by AHIMA or its Commission on Certification for Health Informatics and Information Management (CCHIIM). CCS and Certified Coding Specialist are registered marks of AHIMA. CPT is a registered trademark of the American Medical Association. This is not a government app and does not provide any government service.

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What’s new

First release: Inpatient Abstract drills on principal diagnosis, sequencing and POA, the free Case Mix and DRG Bench, and study modes for all five CCS domains.