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National OASIS Integrity
...Ensuring Accuracy of OASIS Assessments

This May 2008 revision of the original National OASIS Integrity Project Manual incorporates the additional guidance published by CMS in the form of OASIS Q and A through April 2008 retrieved from www.qtso.com, the OCCB website and Chapter 8 of the OASIS Implementation Manual revised January 2008 retrieved from www.cms.hhs.gov/HomeHealthQualityInits/14_HHQIOASISUserManual.asp.

OASIS Integrity Manual

Updated Recommended Questions and Techniques for OASIS M0 Items

CMS OASIS Q and A September 2009 was released after the OASIS Integrity Manual was revised May 2008.

CMS OASIS Q and A July 2009 was released after the OASIS Integrity Manual was revised May 2008.

CMS OASIS Q and A April 2009 was released after the OASIS Integrity Manual was revised May 2008.

CMS OASIS Q and A January 2009 was released after the OASIS Integrity Manual was revised May 2008.

CMS OASIS Q and A October 2008 was released after the OASIS Integrity Manual was revised May 2008.

CMS OASIS Q and A July 2008 was released after the OASIS Integrity Manual was revised May 2008.

CMS OCCB Q and A April 2008

CMS OCCB Q and A January 2008

CMS OASIS Q and A October 2007

CMS Revised Category 4 Q and A October 22, 2007


Original Notice for Attachment D

"Attachment D" to Chapter 8 of the "OASIS Implementation Manual" has been reissued to promote accurate selection and assignment of the patient's diagnosis on the current OASIS (OASIS B1 (1/2008). This document clarifies CMS expectations specific to the assignment of diagnosis codes to the OASIS as dictated by the revised ICD-9-CM coding guidelines effective Oct. 2008 and the HH PPS refinements effective January, 2008. Attachment D addresses the diagnoses items that pertain to the home health episode (i.e., M0230, M0240 and M0246) and is currently posted in the "Downloads" section of the "OASIS B1 User Manual website" (posted 12/31/2008).


OASIS C Final Version
July 2009

Crosswalk-Comparison of OASIS-B1 to OASIS C


Original Notice for Attachment D

February 12, 2009

From the webpage of the Center for Medicare and Medicaid Service’s (CMS’s) HHA Center.

Notification of errors in Attachment D to Chapter 8 of the "OASIS Implementation Manual".

First bullet in Section D (3) (b) of Attachment D contains an error. Currently, the first bullet in this section of the document incorrectly omits specific secondary diagnosis instruction. The correct wording is the following: "Ensure that the secondary diagnosis under consideration includes not only conditions actively addressed in the patient's plan of care but also any comorbidity affecting the patient's responsiveness to treatment and rehabilitative prognosis, even if the condition is not the focus of any home health treatment itself." (Posted 02/12/09)

First sentence in Section D (3) of Attachment D contains an error. Currently, the first sentence in this section of the document omits the word "or" before the phrase "affect the treatment or care". The correct wording is the following: "Secondary diagnoses, or other diagnoses, are defined as all conditions that coexisted with the primary diagnosis at the time the plan of care was established, or which developed subsequently, or affect the treatment or care of the patient". (Posted 02/12/09)

Notification of Error in Attachment D to Chapter 8 of the "OASIS Implementation Manual".

Section D (4) (c) (3) of Attachment D in the "OASIS Implementation Manual" contains an error. Currently, this section of the document incorrectly lists the Neuro 3-Stroke diagnosis group. The correct diagnosis group is Neuro 1-Brain Disorders and Paralysis. Case Scenario #4 also incorrectly assigns a diagnosis from the Neuro 3-Stroke diagnosis group. The correct diagnosis assignment in Scenario #4 should be from the Neuro 1- Brain Disorders and Paralysis diagnosis group. Revisions to the above section of Attachment D, to include revisions to the associated Case Scenario #4, will be posted in the near future.

Attachment D" to Chapter 8 of the "OASIS Implementation Manual" posted December 2008 is found in the "Downloads" section of the "OASIS B1 User Manual website.

Questions related to Attachment D should be sent to: AskOasisAttachD@cms.hhs.gov