🇬🇧 United Kingdom 🇬🇧 United Kingdom · SI 1985/967 Schedule 1 · RIDDOR 2013 · IIAC advisory

IIDB Prescribed Diseases (A/B/C/D)

Official UK occupational disease catalogue underpinning the no-fault Industrial Injuries Disablement Benefit. 43 prescribed diseases in 4 lettered categories. Distinct from RIDDOR — IIDB is the benefit, RIDDOR is the reporting duty.

A physical: 11B biological: 10C chemical: 8D miscellaneous lung: 9

IIDB — benefit instrument

No-fault state benefit paid by DWP when occupational disablement reaches threshold (≥14% generally; ≥1% for some lung diseases). Civil claims separate; no US-style workers' compensation.

SI 1985/967 Schedule 1 + IIAC advice for additions.

RIDDOR — reporting instrument

Employer/responsible person must report to HSE online when a doctor diagnoses a specified occupational disease linked to specified work. Reg 8-9 of RIDDOR 2013.

HSE reportable incidents →

Category A — Conditions due to physical agents

14 diseases
A1

Leukaemia (other than CLL) OR primary cancer of: bone / bladder / breast / colon / liver / lung / ovary / stomach / testis / thyroid — due to ionising radiation (sufficient to double risk)

RIDDOR

Key work: Radiation workers, nuclear industry, radiography

A2

Cataract due to electromagnetic radiation from red-hot or white-hot material (infrared/heat)

Key work: Glassblowers, foundry workers, furnace operators (≥5 years exposure typically)

A3

Dysbarism (decompression sickness, barotrauma, osteonecrosis)

Key work: Compressed-air workers, divers

A4

Task-specific focal dystonia of the hand or forearm (cramp)

Key work: Prolonged repetitive movements (writing, keyboard, instrument)

A5

Subcutaneous cellulitis of the hand ('beat hand')

Key work: Manual labour with severe/prolonged friction/pressure on hand

A6

Bursitis or subcutaneous cellulitis arising at or about the knee (beat knee, housemaid's knee)

Key work: Manual labour causing severe or prolonged external friction or pressure at/about the knee

A7

Bursitis or subcutaneous cellulitis arising at or about the elbow (beat elbow)

Key work: Manual labour causing severe or prolonged external friction or pressure at/about the elbow

A8

Traumatic inflammation of tendons of hand/forearm or tendon sheaths (tenosynovitis)

RIDDOR

Key work: Manual labour OR frequent/repeated movements of the hand/wrist

A10

Occupational deafness — sensorineural hearing loss

Key work: Noise >=85 dB(A) prolonged (use of pneumatic/percussive tools, machinery, weaving)

Surveillance: Audiometry health surveillance (Control of Noise at Work Regs 2005, Upper EAV 85 dB(A))

A11

Hand-Arm Vibration Syndrome (HAVS) — vascular (vibration white finger) + neurological

Key work: Hand-held vibrating tools (grinders, chainsaws, breakers); prescribed 1985

Surveillance: HAVS health surveillance tiers 1-5 (Control of Vibration at Work Regs 2005, EAV 2.5 m/s² A(8), ELV 5 m/s²)

A12

Carpal tunnel syndrome (from hand-held vibrating tools)

Key work: Vibrating tools; prescribed from April 1993

A13

Osteoarthritis of the hip

Key work: Farmers/farm workers (long-term)

A14

Osteoarthritis of the knee

Key work: Coal miners (underground, long service)

A15

Dupuytren's contracture

Key work: Hand-held vibrating tools (added per IIAC)

Category B — Conditions due to biological agents

10 diseases
B1

Anthrax

RIDDOR Notifiable

Key work: Handling infected animals/hides/wool/bone

B3

Brucellosis

RIDDOR

Key work: Contact with cattle/sheep/goats/pigs or their carcasses (farmers, abattoir, vets)

B4

Leptospirosis (Weil's disease)

RIDDOR

Key work: Work with rats/cattle/pigs, sewers, canals (rodent urine)

B5

Tuberculosis

Key work: Contact with TB patients/material (healthcare, lab, mortuary)

Surveillance: NICE NG33; IGRA screening (sprint20)

B6

Extrinsic allergic alveolitis (incl. Farmer's lung, bird fancier's lung)

Key work: Mouldy hay/vegetable matter, birds, mushroom compost, metalworking fluid mist

B7

Infection by organisms from animals (e.g. orf, Streptococcus suis, ovine chlamydiosis)

RIDDOR

Key work: Animal handling, abattoir, veterinary

B8

Viral hepatitis (B/C)

RIDDOR

Key work: Contact with human blood/body fluids (healthcare, lab)

Surveillance: HBV vaccination + anti-HBs (sprint1); PEP (sprint21)

B9

Infection by HIV (occupational)

Key work: Needlestick/exposure to HIV-infected blood (healthcare)

B12

Lyme disease

Key work: Outdoor work in tick-endemic areas (forestry, conservation)

B14

Q fever (Coxiella burnetii)

Key work: Contact with animals/birds/their products

Category C — Conditions due to chemical agents

9 diseases
C1

Lead poisoning

Key work: Smelting, battery manufacture, paint stripping, scrap

Surveillance: Control of Lead at Work Regs 2002 (CLAW) — blood lead suspension levels

C3

Phosphorus poisoning

Key work: Match/fireworks/chemical manufacture

C4

Arsenic poisoning

Key work: Smelting, pesticide/glass manufacture

C6

Carbon disulphide poisoning

Key work: Viscose rayon manufacture

C7

Benzene-induced anaemia / leukaemia

Key work: Petrochemical, solvent use

C16

Mercury poisoning

Key work: Chlor-alkali, instrument/thermometer, dental amalgam (legacy)

C22

Primary carcinoma of nasal cavity/paranasal sinuses

RIDDOR

Key work: Hardwood dust (furniture), leather dust, nickel refining

C23

Primary carcinoma of the bladder

RIDDOR

Key work: Aromatic amines (dye, rubber, MbOCA)

C30

Chrome ulceration (skin/nasal septum)

Key work: Chromium plating, tanning

Category D — Miscellaneous conditions (incl. occupational lung diseases)

10 diseases
D1

Pneumoconiosis (incl. silicosis, coal worker's pneumoconiosis, asbestosis)

RIDDOR

Key work: Silica/coal/asbestos/other mineral dust

D2

Byssinosis

Key work: Cotton/flax dust (textile spinning)

D3

Diffuse mesothelioma

RIDDOR

Key work: Asbestos exposure (any)

Disablement assessed 100%; major UK asbestos legacy

D4

Allergic rhinitis (occupational)

Key work: Flour, animals, isocyanates, wood, latex, enzymes

D5

Occupational dermatitis (non-infective)

RIDDOR

Key work: Wet work, irritants, sensitisers (chromate, epoxy, rubber, nickel)

D7

Occupational asthma

RIDDOR

Key work: Isocyanates (leading UK cause), flour/grain, wood dust, soldering flux/colophony, latex, lab animals, glutaraldehyde

Surveillance: Respiratory questionnaire + serial peak flow + spirometry (COSHH)

D8

Primary carcinoma of the lung WITH asbestosis (or bilateral pleural thickening)

RIDDOR

Key work: Asbestos

D9

Diffuse pleural thickening (bilateral)

Key work: Asbestos

D10

Primary carcinoma of the lung (without asbestosis) — specified exposures

Key work: Asbestos (occupational, defined exposure) / silica / certain processes

D12

Chronic obstructive pulmonary disease (COPD)

Key work: Coal miners (underground, >=20 years)

RIDDOR 2013 specified occupational diseases

Employer/responsible person must report to HSE (online) when a doctor diagnoses a specified occupational disease linked to specified work

  • Carpal tunnel syndrome (vibrating tools)
  • Occupational dermatitis
  • Hand-Arm Vibration Syndrome
  • Occupational asthma
  • Tendonitis/tenosynovitis of hand/forearm (repetitive work)
  • Any occupational cancer
  • Any disease attributed to occupational exposure to a biological agent
Structural notes — how IIDB differs from US/ES
  • IIDB Prescribed Diseases use lettered A/B/C/D categories + PD number (A1, B5, C7, D3...) — the UK native coding (NOT ICD)
  • RIDDOR is the REPORTING instrument (to HSE); IIDB is the BENEFIT instrument (DWP) — distinct
  • No US-style workers' compensation; IIDB is no-fault state benefit; civil claims separate
  • HAVS (A11) + occupational asthma (D7) + NIHL (A10) + dermatitis (D5) are the high-volume live UK occupational diseases
  • Mesothelioma (D3) assessed at 100% disablement — major UK asbestos legacy
  • Exact PD numbering/wording amended frequently — confirm against current SI 1985/967 Schedule 1

Devolved implementation

IIDB + RIDDOR are GB-wide (RIDDOR enforced by HSE/HSENI; IIDB administered by DWP across GB, parallel scheme in Northern Ireland via nidirect). No nation-specific disease-list divergence.

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