MBSF CCW: Chronic Condition Documentation for Medicare FFS Claims

CMS Chronic Conditions Data Warehouse (CCW) documentation describing standardized algorithms applied to Medicare fee-for-service (FFS) claims to identify chronic conditions. Maintained by NSAPH and updated through March 2026, it details the processing of inpatient, outpatient, and home health data for all Medicare beneficiaries.

Use Cases

• Identifying chronic condition prevalence using CCW standardized algorithm indicators
• Analyzing healthcare trajectories using fee-for-service (FFS) claim history
• Mapping inpatient and outpatient claim types to standardized CCW condition categories

Strengths

• Uses standardized CMS CCW algorithms for condition identification
• Covers all Medicare fee-for-service beneficiaries regardless of age
• Aggregates data from seven distinct claim types including hospice and DME

Limitations

• Does not include data for beneficiaries enrolled in Medicare Advantage (HMO)
• This specific entry contains documentation only and no raw data files
• Restricted access requiring IRB approval and institutional collaboration

Provenance

Source

CMS Chronic Conditions Data Warehouse (CCW)

Collection Method

Standardized algorithmic processing of Medicare fee-for-service claims

Freshness

Last updated March 2026.

Geography

United States