| HIC3 | HIC3 Description |
| W1A | PENICILLINS |
| W1B | CEPHALOSPORINS |
| W1C | TETRACYCLINES |
| W1D | MACROLIDES |
| W1E | CHLORAMPHENICOL AND DERIVATIVES |
| W1F | AMINOGLYCOSIDES |
| W1G | ANTITUBERCULAR ANTIBIOTICS |
| W1H | AMINOCYCLITOLS |
| W1I | PENICILLINS (CONTINUED 1) |
| W1J | VANCOMYCIN AND DERIVATIVES |
| W1K | LINCOSAMIDES |
| W1L | ANTIBIOTICS, MISCELLANEOUS, OTHER |
| W1M | STREPTOGRAMINS |
| W1N | POLYMYXIN AND DERIVATIVES |
| W1O | OXAZOLIDINONES |
| W1P | BETALACTAMS |
| W1Q | QUINOLONES |
| W1R | BETA-LACTAMASE INHIBITORS |
| W1S | CARBAPENEMS (THIENAMYCINS) |
| W1T | CEPHALOSPORINS (CONTINUED 1) |
| W1U | QUINOLONES (CONTINUED 1) |
| W1V | STEROIDAL ANTIBIOTICS |
| W1W | CEPHALOSPORINS - 1ST GENERATIONS |
| W1X | CEPHALOSPORINS - 2ND GENERATION |
| W1Y | CEPHALOSPORINS - 3RD GENERATION |
| W1Z | CEPHALOSPORINS - 4TH GENERATION |
| W2A | ABSORBABLE SULFONAMIDES |
| W2B | NON-ABSORBABLE SULFONAMIDES |
| W2C | ABSORBABLE SULFONAMIDES (CONTINUED 1) |
| W2E | ANTI-MYCOBACTERIUM AGENTS |
| W2F | NITROFURAN DERIVATIVES |
| W2G | CHEMOTHERAPEUTICS, ANTIBACTERIAL, MISC. |
| W2Y | ANTI-INFECTIVES, MISC. (ANTIBACTERIALS) |
| W3A | ANTIFUNGAL ANTIBIOTICS |
| W3B | ANTIFUNGAL AGENTS |
| W3C | ANTIFUNGAL AGENTS (CONTINUED 1) |
| W3D | ANTIFUNGAL AGENTS (CONTINUED 2) |
| W3E | ANTIFUNGAL-LOCAL ANESTHETIC-ANTIHISTAMINE COMBINATION |
| W4A | ANTIMALARIAL DRUGS |
| W4C | AMEBICIDES |
| W4E | ANAEROBIC ANTIPROTOZOAL-ANTIBACTERIAL AGENTS |
| W4F | ANTI-INFECTIVES, MISC. (ANTIPARASIT) (OBSOLETE) |
| W4G | 2ND GENERATION ANAEROBIC ANTIPROTOZOAL-ANTIBACTERIAL |
| W4K | ANTIPROTOZOAL DRUGS,MISCELLANEOUS |
| W4L | ANTHELMINTICS |
| W4M | ANTIPARASITICS |
| W4N | INSECT REPELLANTS |
| W4O | ANTHELMINTICS (CONTINUED 1) |
| W4P | ANTILEPROTICS |
| W4Q | INSECTICIDES |
| W5A | ANTIVIRALS, GENERAL |
| W5B | ANTIVIRALS, HIV-SPECIFIC, OTHER |
| W5C | ANTIVIRALS, HIV-SPECIFIC, PROTEASE INHIBITORS |
| W5D | ANTIVIRAL MONOCLONAL ANTIBODIES |
| W5E | HEPATITIS A TREATMENT AGENTS |
| W5F | HEPATITIS B TREATMENT AGENTS |
| W5G | HEPATITIS C TREATMENT AGENTS |
| W5H | ANTIVIRALS, GENERAL (CONTINUED 1) |
| W5I | ANTIVIRALS, HIV-SPECIFIC, NUCLEOTIDE ANALOG, RTI |
| W5J | ANTIVIRALS, HIV-SPECIFIC, NUCLEOSIDE ANALOG, RTI |
| W5K | ANTIVIRALS, HIV-SPECIFIC, NON-NUCLEOSIDE, RTI |
| W5L | ANTIVIRALS, HIV-SPEC., NUCLEOSIDE ANALOG, RTI COMB |
| W5M | ANTIVIRALS, HIV-SPECIFIC, PROTEASE INHIBITOR COMB |
| W5N | ANTIVIRALS, HIV-SPECIFIC, FUSION INHIBITORS |
| W5O | ANTIVIRALS, HIV-SPEC, NUCLEOSIDE-NUCLEOTIDE ANALOG |
| W5P | ANTIVIRALS. HIV SPECIFIC, NON-PEPTIDIC PROTEASE INHIBITOR |
| W5Q | ARTV COMBINATION NUCLEOSIDE, NUCLEOTIDE, AND NON-NUCLEOSIDE RTI |
| W5R | HEPATITIS B TX AGENT, NUCLEOSIDE ANALOG (NRTI) TYPE |
| W5S | ANTIVIRALS, GENERAL/DIETARY SUPPLEMENT COMBINATION |
| W5T | ANTIVIRALS, HIV-SPECIFIC, CCR5 CO-RECEPTOR ANTAG. |
| W5U | ANTIVIRALS, HIV-1 INTEGRASE STRAND TRANSFER INHIBTR |
| W6A | DRUGS TO TREAT SEPSIS SYNDROME, NON-ANTIBIOTIC |
| W7B | VIRAL/TUMORIGENIC VACCINES |
| W7C | INFLUENZA VIRUS VACCINES |
| W7D | ANTISERA (CONTINUED 1) |
| W7E | BACTERIAL HEMOLYTIC EXOTOXINS |
| W7F | MUMPS AND RELATED VIRUS VACCINES |
| W7G | ANTIVENINS (CONTINUED 1) |
| W7H | ENTERIC VIRUS VACCINES |
| W7I | IMMUNOSTIMULANTS,BACTERIAL |
| W7J | NEUROTOXIC VIRUS VACCINES |
| W7K | ANTISERA |
| W7L | GRAM POSITIVE COCCI VACCINES |
| W7M | GRAM (-) BACILLI (NON-ENTERIC) VACCINES |
| W7N | TOXIN-PRODUCING BACILLI VACCINES/TOXOIDS |
| W7O | GRAM POSITIVE ROD/BACILLUS VACCINES |
| W7P | RICKETTSIAL VACCINES |
| W7Q | GRAM NEGATIVE COCCI VACCINES |
| W7R | SPIROCHETE VACCINES |
| W7S | ANTIVENINS |
| W7T | ANTIGENIC SKIN TESTS |
| W7U | HYMENOPTERA-DERIVED AGENTS |
| W7V | RHUS EXTRACTS (POISON OAK, POISON IVY) |
| W7W | ALLERGENIC EXTRACTS, THERAPEUTICS |
| W7X | BACTERIA,AEROBIC/ANAEROBIC AGENTS |
| W7Y | FUNGI/YEAST PREPARATIONS |
| W7Z | VACCINE/TOXOID PREPARATIONS,COMBINATIONS |
| W8A | HEAVY METAL ANTISEPTICS |
| W8B | SURFACE ACTIVE AGENTS |
| W8C | IODINE ANTISEPTICS |
| W8D | OXIDIZING AGENTS |
| W8E | ANTISEPTICS,GENERAL |
| W8F | IRRIGANTS |
| W8G | ANTISEPTICS,MISCELLANEOUS |
| W8H | MOUTHWASHES |
| W8I | ANTISEPTICS,MISCELLANEOUS (CONTINUED 1) |
| W8J | ANTIBACTERIAL AGENTS,MISCELLANEOUS |
| W8K | ANTISEPTICS,MISCELLANEOUS (CONTINUED 2) |
| W8L | HEAVY METAL ANTISEPTICS (CONTINUED 1) |
| W8M | ANTISEPTICS, MISCELLANEOUS (CONTINUED 3) |
| W8N | TOPICAL ANTISEPTIC DRYING AGENTS |
| W8T | PRESERVATIVES |
| W8U | PRESERVATIVES (CONTINUED 1) |
| W9A | KETOLIDES |
| W9B | CYCLIC LIPOPEPTIDES |
| W9C | RIFAMYCINS AND RELATED DERIVATIVE ANTIBIOTICS |
| W9D | GLYCYLCYCLINES |
| W9E | PLEUROMUTILIN DERIVATIVES |
| W9F | QUATERNARY PROTOBERBERINE |
| W9G | CEPHALOSPORINS - EXTENDED SPECTRUM, ANTI-MRSA |
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