The OASIS-E2 Manual — Plain-English, CMS-Cited
A clinician-authored companion to the official CMS Guidance Manual. Built for the home health team — admins, DONs, intake, QA, and clinicians who chart OASIS.
Tools
Quick answers when you’re in the field
Three interactive tools that answer the questions clinicians and admins ask most often — without digging through a guidance manual.
Deadline Calculator
When’s it due?
Enter a Start of Care date. We’ll show every OASIS deadline on the cert period.
Pick a SOC date above to see all five deadlines.
Item Lookup
Look up an item.
Scoring guidance, response options, and common errors for any OASIS-E2 item.
Pick an item above or type a code (e.g., M1830) to look up its scoring rules and common errors.
Which OASIS am I supposed to do?
Answer 2–3 questions and we'll point you at the right RFA code, M0090 rule, and transmission deadline. CMS-cited.
What's happening with the patient?
Manual
Deeper reading, by topic
CMS-cited chapters covering the full OASIS-E2 process — for when you have time to read.
If you're an admin or DON
OASIS Assessment Schedule (SOC, ROC, Recert, Discharge)
When each OASIS assessment is required and how the 60-day cert period anchors the schedule.
RFA Codes (01–09)
The Reason for Assessment field — every OASIS assessment is one of nine RFA codes. (RFA 02 retired in OASIS-C 2010; RFA 10 does not exist.)
M0090, Completion Windows, and Transmission Deadlines
The dates that drive every OASIS — completion windows, M0090, and the 30-day submission rule.
QA Workflow, Locking, and Corrections
How agencies QA assessments before transmission and the rules for correcting submitted assessments.
Submitting OASIS to iQIES
iQIES submission, validation errors, and what to do when a record is rejected.
OASIS Glossary
Common abbreviations, terms, and acronyms used throughout the OASIS-E2 spec.
If you score OASIS items