| HIC3 | HIC3 Description |
| D0U | GASTROINTESTINAL RADIOPAQUE DIAGNOSTICS |
| D0V | GASTROINTESTINAL RADIOACTIVE DIAGNOSTICS |
| D1A | PERIODONTAL COLLAGENASE INHIBITORS |
| D1B | PERIODONTAL ANESTHETICS |
| D1C | LOCAL ANESTHETICS, DENTAL/ORAL |
| D1D | DENTAL AIDS AND PREPARATIONS |
| D1E | PERIODONTAL TETRACYCLINE ANTIINFECTIVE, LOCAL |
| D2A | FLUORIDE PREPARATIONS |
| D2D | TOOTH ACHE PREPARATIONS |
| D2M | DENTAL PREPARATIONS,MISCELLANEOUS |
| D4A | ACID REPLACEMENT |
| D4B | ANTACIDS |
| D4C | AGENTS FOR STOMATOLOGICAL USE |
| D4D | ANTIDIARRHEAL MICROORGANISMS AGENTS |
| D4E | ANTI-ULCER PREPARATIONS |
| D4F | ANTI-ULCER-H.PYLORI AGENTS |
| D4G | GASTRIC ENZYMES |
| D4H | ORAL MUCOSITIS/STOMATITIS AGENTS |
| D4I | ORAL MUCOSITIS/STOMATITIS ANTI-INFLAMMATORY AGENT |
| D4J | PROTON-PUMP INHIBITORS |
| D4K | GASTRIC ACID SECRETION REDUCERS |
| D4L | SALIVA SUBSTITUTE AGENTS |
| D4M | ENKEPHALINASE INHIB - ANTISECRETORY ANTIDIARRHEAL |
| D4N | ANTIFLATULENTS |
| D4O | G.I. ULTRASOUND IMAGE-ENHANCING ADJNCT,DIAGNOSTIC |
| D4P | ANTACIDS (CONTINUED 1) |
| D4Q | DIGESTIVE AGENTS, OTHER |
| D4R | SALIVA STIMULANT AGENTS |
| D4S | GASTROINTESTINAL CHLORIDE CHANNEL ACTIVATOR |
| D4T | GASTRIC FUNCTION DIAGNOSTICS |
| D4U | GASTRIC FUNCTION RADIOPAQUE DIAGNOSTICS |
| D4V | ANTIDIARRHEAL MICROORGANISMS AGENTS (CONTINUED 1) |
| D4W | GASTRIC ENZYMES (CONTINUED 1) |
| D4X | ANTIDIARRHEAL - G.I. CHLORIDE CHANNEL INHIBITORS |
| D4Y | ANTACID AND ANESTHETIC COMBINATION |
| D5A | FAT ABSORPTION DECREASING AGENTS |
| D5P | INTESTINAL ADSORBENTS AND PROTECTIVES |
| D6A | DRUGS TO TX CHRONIC INFLAMM. DISEASE OF COLON |
| D6B | IRRITABLE BOWEL SYNDROME(IBS), ANTISPASMODIC& FIBER |
| D6C | IRRITABLE BOWEL SYNDROME AGENTS, 5-HT3 ANTAGONIST |
| D6D | ANTIDIARRHEALS |
| D6E | IRRITABLE BOWEL SYND. AGENT, 5-HT4 PARTIAL AGONIST |
| D6F | DRUG TX-CHRONIC INFLAM. COLON DX,5-AMINOSALICYLAT |
| D6G | IRRITABLE BOWEL AGENTS,GUANYLATE CYLASE-C AGONIST |
| D6H | HEMORRHOIDAL AGENTS |
| D6I | SBS - GLUCAGON-LIKE PEPTIDE-2 (GLP-2) ANALOGS |
| D6J | GLUCAGON-LIKE PEPTIDE-2 (GLP-2) ANALOGS |
| D6K | INTEGRIN RECEPTOR ANTAGONIST, MONOCLONAL ANTIBODY |
| D6S | LAXATIVES AND CATHARTICS |
| D6T | LAXATIVES AND CATHARTICS (CONTINUED 1) |
| D7A | BILE SALTS |
| D7B | CHOLERETICS |
| D7C | HEPATIC DIAGNOSTICS |
| D7D | DRUGS TO TREAT HEREDITARY TYROSINEMIA |
| D7J | HEPATIC DYSFUNCTION PREVENTIVE/THERAPY AGENTS |
| D7L | BILE SALT SEQUESTRANTS |
| D7T | BILIARY DIAGNOSTICS |
| D7U | BILIARY DIAGNOSTICS,RADIOPAQUE |
| D8A | PANCREATIC ENZYMES |
| D8B | PANCREATIC DIAGNOSTICS |
| D9A | AMMONIA INHIBITORS |
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