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Home Health Outcome and Assessment Information Set (OASIS) Files

Medicare

Description

Our Home Health Outcome and Assessment Information Set (OASIS) files have the following data about individuals who receive home health care from a Medicare-certified home health agency:

  • cognitive health status;
  • diagnosis codes;
  • living environment;
  • mood status;
  • physical evaluations;
  • processing codes;
  • service dates; and
  • social behavior.

There are two versions of OASIS data: Version B1 and Version C. Version B1 covers 1999 to 2010, and Version C covers 2010 to now.

Variables Summary

The table below lists variable categories for and some key variables in OASIS data. For a comprehensive list of variables, review the OASIS data dictionary.

Cognitive Assessment

General Cognitive Functioning, Impairments to Decision Making, Memory Deficit

Costs

Medicaid Health Maintenance Organization (HMO)/Managed Care, Medicare HMO/Managed Care, Private Insurance, Self-Pay

Dates

Date of Last Home Visit, Discharge/Transfer/Death Date, Oldest Stage II Onset Date, Physician Date of Referral, Resumption of Care Date, Start of Care Date

Demographics

Age, Beneficiary Identification Number, Date of Birth, Gender, Height, Race/Ethnicity, State Code, Weight

Diagnoses

Deep Vein Thrombosis/Pulmonary Embolus, Heart, Infections, Nutritional, Psychiatric, Vision

Mood & Behavior

Paranoia, Physically Aggressive, Socially Inappropriate

Physical Assessment

Activities of Daily Living (ADL) Patterns, Airway Pressure, Bowels/Incontinence, Feeding/Eating, Oral Medication Management, Pain Assessment and Frequency, Swallowing/Nutritional Status, Ulcers, Urinary (e.g., UTIs and Urinary Incontinence), Vision

Procedures, Services & Treatments

Hospice Care, Influenza Vaccine, Pneumococcal Vaccine, Respiratory Treatments, Respite Care

Processing

Version Code

Provider

National Provider Identifiers (NPIs), Physician NPI, Physician Orders

Years Available

1999 - 2018

Data Dictionary Link

Undergoing Updates

NIA Surveys Offering OASIS

HRS, LLFS, NSHAP, PT, RADC, WLS

NIA Surveys Not Offering OASIS

BLSA, CE, HABC, NHAS, NHATS, NLTCS, PSAD, PSID, UAS, UFOVT

Additional Resources