| Full description of disease or condition | Control action recommended:
IR – immediately R4 – after 4 weeks R10 after 10 weeks | Is the incapacity certifiable as infectious or contagious? | For SMP purposes, is the incapacity pregnancy related? |
| IBS (Irritable Bowel Syndrome) | R10 | No | No |
| IDDM (Insulin Dependant Diabetes) | R10 | No | Probably not |
| IDK (Internal Derangement of Knee) | R10 | No | No |
| IHD (Ischaemic Heart Disease) | R10 | No | Probably not |
| Ileostomy | None | No | No |
| Impaired memory | None | No | No |
| Impetigo | R4 | No | No |
| Indigestion | R4 | No | No |
| Infantile Paralysis | None | Yes | No |
| Infected (or infection of) ear, external | R4 | No | No |
| Infected (or infection of), other | R4 | No | No |
| Infectave Hepatitis | R10 | Yes | No |
| Infective Jaundice | R10 | Yes | No |
| Infective mononucleosis | R10 | No | No |
| Infective parotitis | R10 | Yes | No |
| Inflamed, or inflamation of… | R4 | No | No |
| Influenza of any kind | R4 | No | No |
| Ingrowing nail(s) | R4 | No | No |
| Injury (nature unspecified), to a limb, face, neck, trunk, joint, back or shoulder | R4 | No | No |
| Injury, (nature and site unspecified) | R4 | No | No |
| In-patient | None | No | Probably not |
| Insomnia* | None | No | Probably not |
| Insulin dependent diabetes myelitis | R10 | No | Probably not |
| Intermittent claudication | None | No | No |
| Internal Derangement of Knee (IDK) | R10 | No | No |
| Internal semi-lunar cartilage of knee | R10 | No | No |
| Intestinal obstruction | None | No | No |
| Investigation | R10 | No | Probably not |
| Iritis | R10 | No | No |
| Irritable Bowel Syndrome (IBS) | R10 | No | No |
| Ischaemic Heart Disease (IHD) | R10 | No | Probably not |
| Ischaemia of any kind | R10 | No | No |
| ISC (Internal Semilunar Cartilage of knee) | R10 | No | No |
| Jaundice | R10 | No | Probably not |
| Keratitis | R10 | No | No |
| Kidney dialysis | None | No | Probably not |
| Kidney disease | R10 | No | Probably not |
| Kidney infection | R10 | No | Probably not |
| Kidney transplant | None | No | No |
| Labyrinthitis | R10 | No | No |
| Laceration | R4 | No | No |
| Laminectomy | R10 | No | Probably not |
| Laparotomy | R10 | No | Probably not |
| Laryngitis of any kind | R4 | No | No |
| Lassa Fever | R10 | Yes | No |
| LBP (Low Back Pain) | R10 | No | Probably not |
| Lead intoxication (poisoning) | R10 | No | No |
| Learning difficulties | None | No | No |
| Left Heart failure (LHF) | None | No | Probably not |
| Left Ventricular Failure (LVF) | None | No | Probably not |
| Leg Ulcer | R10 | No | No |
| Leprosy | None | Yes | No |
| Leptospirosis | R10 | Yes | No |
| Leptospiral jaundice | R10 | Yes | No |
| Leucorrhoea | R4 | No | Probably not |
| Leukaemia | None | No | No |
| Leukorrhoea | R4 | No | No |
| LHF (Left Heart Failure) | None | No | Probably not |
| LIH (Left Inguinal Hernia) | R10 | No | No |
| Lipoma | R4 | No | No |
| Liver disease | R10 | No | Probably not |
| Liver failure | None | No | Probably not |
| Liver transplant | None | No | No |
| Lobectomy | None | No | No |
| Low back pain | R10 | No | Probably not |
| Lower disc syndrome | R10 | No | Probably not |
| Lumbago | R10 | No | Probably not |
| Lumbar fibrositis | R10 | No | Probably not |
| Lumbar spondylolisthesis | R10 | No | Probably not |
| Lumbar spondylosis | R10 | No | Probably not |
| Lupus | None | No | Probably not |
| LV aneurysm | None | No | No |
| Left Ventricular Aneurysm | None | No | No |
| LVF (Left Ventricular Failure) | None | No | Probably not |
| Lympadenitis | R4 | No | No |
| Lymphangitis | R4 | No | No |
| Lymphoedema | R10 | No | No |
| Lymphoma | None | No | No |
| Lympho-sarcoma | None | No | No |
