The Centers for Medicare and Medicaid Services (CMS) HHA Correction Policy can be accessed by referring to CMS S&C letter 15-18 OASIS Correction Policy for HHAs. It was released 1/2015; hereinafter referred to as the OASIS Correction Policy.

https://www.cms.gov/Medicare/Provider-Enrollment-and-Certification/SurveyCertificationGenInfo/Downloads/Survey-and-Cert-Letter-15-18.pdf

The State Operations Manual, Chapter 2, Section 2202.11-Correction Policy can be accessed at:

https://www.cms.gov/Regulations-and-Guidance/Guidance/Manuals/downloads/som107c02.pdf