Table 1.

Definition of Structured Variables from CMS Descriptive Algorithms

Variable	Details	Remarks
cc	Chronic Condition
icd9 (C1)	ICD9 Codes for all types of Inclusion Criteria	Effective dates for ICD-9 codes vary but are valid through 09/2015
icd9_exc_a (C2)	ICD9 Codes for any of the diagnosis’s positions for exclusion criteria	Contains logic and code
icd9_exc_p	ICD9 Codes for primary diagnoses position for exclusion criteria	Contains only logic
icd10	ICD10 Codes for all types of Inclusion Criteria	ICD-10 codes are effective 10/2015;
icd10_exc_a	ICD10 Codes for any of the diagnosis’s positions for exclusion criteria	Contains only code
icd10_exc_p	ICD10 Codes for primary diagnoses position for exclusion criteria	Contains only code
inc_a	Any DX on the claim	1=Yes, 0=No
inc_12	INCLUSION: Only the first or second DX on the claim	1=Yes, 0=No
inc_p	INCLUSION: Only principal DX on the claim	1=Yes, 0=No
exc_a	EXCLUSION: If any of the qualifying claims have these DX Codes in any DX position	1=Yes, 0=No
exc_p	EXCLUSION: If any of the qualifying claims have these DX Codes in principle, the DX position	1=Yes, 0=No
ip	InPatient	Minimum visit frequency
snf	SNF refers to the skilled nursing facility	Minimum visit frequency
hha	HHA refers to the home health agency	Minimum visit frequency
hop	HOP refers to hospital outpatient	Minimum visit frequency