Table 1

Structure of SNIPS and the number of ICPC-2 Plus terms it classifies
Level 1	Level 2	L2 Code	Level 3	L3 Code	Terms

General/Vascular/Plastics (GVP)	Hepatobiliary-Upper GI	HBUG	Upper GI	UPRGI	81
			Hepatobiliary-Pancreatic	HPBPA	31
			Small bowel/Appendix	SBAPP	16

	Colorectal	CREC	Colon Neoplasia/Bleeding	CLNCA	15
			Colonic Other	COLON	49
			Perianal	PANAL	22

	Hernia	HERN	Inguinal hernia	HEING	4
			Ventral hernia	HERVN	7

	Abdominal other	ABDO	Generalised Abdominal Pain	ABDPN	18
			Anaemia & Lymphoid	ANLYM	18
			Abdominal other 2	ABDOM	42

	Breast-Endocrine	BREN	Breast Lump/Cancer	BRLMP	20
			Breast Other	BREST	42
			Endocrine	ENDOC	34
			Obesity	OBESI	5

	Skin/Integument	SKIN	Skin Infection/Injury	INFNJ	91
			Skin Lesions	LSION	75

	Vascular	VASC	Arterial	ARTRL	29
			Varicose Veins	VEINS	9
			Venous thrombosis	DEVET	8

Orthopaedics (ORT)	Back	BACK	Back	SPINE	122

	Shoulder	SHLD	Shoulder Arthritis/Pain	SHART	20
			Shoulder Injury/Instability	SHINJ	7

	Forearm, Wrist & Hand	FWRH	Forearm fracture	FAFRC	11
			Forearm/Hand Other Injury	FAINJ	15
			Forearm/Hand Non-Injury	FAOTH	30

	Hip Arthritis	HIPA	Hip Arthritis	HPART	8

	Knee	KNEE	Knee Arthritis/pain	KNART	11
			Knee Injury/instability	KNINJ	27

	Ankle & Foot	ANKF	Ankle Fracture	ANFRC	7
			Ankle/Foot Other Injury	ANINJ	13
			Ankle/Foot Non-Injury	ANOTH	26

	Ortho Other	ORTO	Other Arthritis (Site NOS)	OTART	22
			Other Fracture/Dislocation	OTFRC	31
			Other Injury (Non-Frac/Disl)	OTINJ	28
			Other Ortho Non-Injury	OTOTH	92

Ear, Nose & Throat (ENT)	-	ENT2	Ear/Mastoid Infective	EARIN	34
			Ear/Mastoid Non-Infective	EAROT	69
			Nose/Paranasal Sinuses	NOSSI	26
			Tonsils/Adenoids	TONSL	13
			Larynx/pharynx	LARYP	19
			Oro-facio-maxillary	FACMX	36

Urology (URL)	-	UROL	Stones/upper tract obstruction	STOUP	18
			Haematuria/Urothelial/renal tumours	HMTCC	17
			Bladder dysfunction	BLDYS	21
			Bladder outflow obstruction	BOOBS	24
			Prostate cancer	PRSCA	5
			Impotence & Penile	IMPEN	25
			Testicle, Scrotum & Vas	TSTIC	33
			Paediatric urology	PAEDU	14
			Urinary Tract Infection	URUTI	6
			Urology Other	UROTH	42

Eye (EYE)	-	EYE2	Painful/red eye	PNRED	17
			Visual Loss	VSLOS	29
			Cataract	CTRCT	4
			Glaucoma	GLAUC	4
			Diabetes, systemic & retinal	DBRET	10
			Muscle imbalance & squint	SQINT	11
			Eye Trauma	EYINJ	16
			Lid/conjunctival disorders	LDCON	31
			Refraction	REFRC	15
			Eye Other	EYOTH	33

Gynaecology (GYN)	Cancer/ Precancer	CAPR	Cervical Cancer/Precancer	CERCA	24
			Other Gynae Neoplasia	GYNCA	12

	Menstrual abn/ Pelvic pain	MENS	Menstrual Disorders	MENST	27
			Pelvic Pain	PELPN	22

	General Gynaecology	GGYN	Prolapse	GYPRL	8
			Other General Gynae	GYOTH	59

	Fertility	FERT	Infertility F	INFRT	6
			Fertility Control F	STRLN	11

Obstetrics (PRG)	-	PREG	Antenatal Normal	ANTEN	18
			Antenatal Abnormal	ANTAB	49
			Delivery	LABOR	16
			Postnatal	PSTNT	13

Other Specialties (OTH)	Neurosurgery	NEUR	Head Injury	HDINJ	18
			Neurosurgery Other	NEOTH	41

	Thoracic surgery	THOR	Thoracic	THOTH	28

	Other Injury	INJU	Injury Multiple & NOS	INJOT	11

	Other Non-Injury	OTHE	Other Non-injury	OTHER	49

Gruen et al. BMC Health Services Research 2004 4:8 doi:10.1186/1472-6963-4-8