TABLE A1.

International Classification of Diseases (ICD9 and ICD10) diagnosis codes, surgical procedure codes, and service codes utilised for data retrieval

Categories	ICD9	ICD10	Surgical codes	Service codes
Inpatient discharge primary diagnosis and secondary diagnosis	2507′ 25 070′ 25 071′ 25 072′ 25 073′ 4402′ 44 020′ 44 021′ 44 023′ 44 024′ 44 029′ 4403′ 44 030′ 44 031′ 44 032′ 443′ 4438′ 44 389′ 4439′ 4442′ 7854′	E09.0 E09.01 E09.02 E09.5 E09.51 E09.52 E10.51 E10.52 E10.73 E11.51 E11.52 E11.73 E13.51 E13.52 E13.73 E14.51 E14.52 E14.73 I70.2 I70.20 I70.21 I70.23 I70.24 I73 I73.8 I73.9 I74.3 I74.4 I79.2
Tertiary outpatient wound nurse care				WC001 WC006
Primary care wound visits				NBF017 NHF018 NBF026 NBF030
Angioplasty				SD720A SD721A SD722A XRM019
Surgical bypass				SD713A SD714A SD810V SD814V SD807A
Minor amputations			SB708T SB830T SB707T SB829T
Major amputations			SB809L
ABPI arterial duplex				VS0020 VS0005 VS0006

Abbreviation: ABPI, arterial‐brachial pressure index.