Seeds of Knowledge
Printable references and practice tools for medical coding, billing, and terminology. Plant the basics, then keep growing.
- Free to download
- Printable PDFs
- Built by ACS educators
Resource Tools
Keep one by your desk, add one to your study plan, or use them to check your work.
Modifier Quick Reference
Commonly used Medicare modifiers in one place, with links to supporting CMS sources.
- Modifier 59 and XE, XP, XS, XU
- Global surgery and E/M modifiers
- NCCI edit indicators
- Modifiers 50, 26/TC, and ABN modifiers
FY 2027 ICD-10-CM Updates
This year’s diagnosis code changes, organized so you can update your tools and workflow.
- New codes grouped by code family
- Deleted codes and what to report instead
- Revised titles and specialty highlights
- October 1 implementation checklist
Medical Terminology Workbook
Build your vocabulary one word part at a time, then practice across 12 body systems.
- Prefixes, suffixes, and word roots
- Word-part tables by body system
- Build, divide, and define exercises
- Complete answer key
Browse by Topic
Curated links to trusted references, study sites, and tools, organized by subject.
Coding References
Official guidelines, code-set resources, and references coders use every day.
View resources → TerminologyMedical Terminology
Tools to learn word parts, definitions, and the language of medical records.
View resources → AnatomyAnatomy Resources
Interactive and visual references for body systems and structures.
View resources →Ready to grow beyond the basics?
Try a free mini course, or explore CPC, CPB, and CPMA training with Advanced Coding Services.
A note about these resources: These tools support learning and reference. They do not replace current official code sets, coding guidelines, or payer policies. The Modifier Quick Reference summarizes Medicare fee-for-service rules; other payers may differ. Always verify requirements for the service, payer, and date of service.