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  1. MDR Adverse Event Codes

Coding Resources for Medical Device Reports

This page contains a comprehensive set of resources for reporters to use when selecting event codes in a Medical Device Report (MDR).  It contains information about the codes and the MedWatch Medical Device Reporting Code Instructions, sometimes referred to as the coding manual.

Current MDR Adverse Event Codes

The FDA MDR adverse event codes are divided into seven code types. The file below contains the hierarchy for each code type.

Reporters should read and familiarize themselves with the hierarchies before filing an MDR.

Updates

The list below contains summaries of updates to the FDA MDR adverse event codes.

September 19, 2025 Update: IMDRF 2025 Maintenance

  • Annex A: Added 3 new terms (A0416, A072203, A150106) and modified 16 terms (A02, A0207, A040607, A0504, A050408, A071209, A0717, A0723, A090813, A110201, A15, A150104, A22, A2201, A26, A27) and retired 3 terms (A0202, A0203, A0204)
  • Annex B: Added 7 new terms (B26, B27, B28, B29, B30, B31, B32) and retired 1 term (B08)
  • Annex C: Modified 13 terms (C020702, C0302, C0305, C040102, C0404, C070601, C070603, C1205, C1206, C1208, C1403, C1502, C22)
  • Annex D: Modified 3 terms (D0105, D1001, D17)
  • Annex E: Added 19 new terms (E0522, E0523, E0628, E0629, E0759, E0760, E0761, E0860, E0911, E0912, E0913, E1213, E1214, E1215, E1652, E1729, E2131, E2132, E2352) and modified 13 terms (E0110, E0111, E0624, E0627, E0732, E0845, E120501, E1648, E2008, E201401, E2121, E24, E2402) and retired 3 terms (E0138, E0753, E2107)
  • Annex F: Added 6 new terms (F0802, F1009, F1010, F2309, F30, F31) and modified 8 terms (F10, F1008, F11, F1908, F1910, F2303, F24, F28) and retired 1 term (F1006)
  • Annex G: Added 2 new terms (G0201208, G02041) and modified 3 terms (G07, G07002, G07003)

August 12, 2024 Update: IMDRF 2024 Maintenance

  • Annex A: Added 6 new terms (A0107, A020505, A050409, A210107, A2205, A2206) and modified 4 terms (A040102, A050406, A090803, A090804).
  • Annex B: No change
  • Annex C: Added 1 new term (C1701).
  • Annex D: Added 2 new terms (D1401, D1402) and modified 2 terms (D14, D0302).
  • Annex E: Added 46 new terms (E0144, E050305, E051501, E0521, E0754, E0755, E0756, E0757, E0758, E0858, E0859, E1036, E1315, E1316, E1317, E161201, E161202, E161604, E161605, E1642, E1643, E1644, E1645, E1646, E1647, E1648, E1649, E1650, E1651, E171501, E1728, E2016, E2125, E2126, E2127, E2128, E2129, E2130, E2344, E2345, E2346, E2347, E2348, E2349, E2350, E2351) and modified 10 terms (E0106, E0512, E0751, E1626, E1707, E2123, E2108, E0619, E232401, E232402) and retired 1 term (E1026). Updated NCIt mapping for 4 terms (E0512, E0751, E1626, E2123).
  • Annex F: Added 5 new terms (F29, F1008, F1910, F2308, F2601) and modified 1 term (F27). Updated NCIt mapping for one term (F27).
  • Annex G: Added 1 new term (G0400501) and modified 1 term (G0403001). Updated NCIt mapping for one term (G0403001).

August 30, 2023 Update: IMDRF 2023 Maintenance

  • Annex A: Added 4 new terms (A2501, A0514, A050408, A0723), modified 4 terms (A050405, A07, A14, A1412), and retired 1 term (A071205).
  • Annex B: Added 1 new term (B25) and modified 3 terms (B15, B16, B24).
  • Annex C: Added 6 new terms (C0109, C0210, C0708, C2301, C2302, C24) and modified 2 terms (C1302, C160504).
  • Annex D: Added 2 new terms (D20, D21).
  • Annex E: Added 19 new terms (E0209, E0520, E0624, E0625, E0626, E0627, E0854, E0855, E0856, E0857, E1212, E1312, E1313, E1314, E1419, E1420, E1727, E2124, E2343) and modified 13 terms (E040202, E0607, E0824, E0827, E0845, E090801, E090802, E120501, E1308, E2012, E2302, E2322, E2401). Updated NCI mapping for 3 terms (E040202, E1308, E2302).
  • Annex F: Added 1 new term (F2307) and modified 5 terms (F11, F19, F1907, F2202, F24). Updated NCIt mapping for 1 term (F2202).
  • Annex G: Added 4 new terms (G0200804, G03014, G03015, G03016) and modified 2 terms (G0200401, G04097). Updated NCIt mapping for 1 term (G04115).

August 19, 2022 Update: IMDRF 2022 Maintenance

  • Annex A: Added 9 terms (A0105, A0106, A020603, A050406, A050407, A050705, A050901, A090814, A210106) and modified 6 terms (A020601, A0504, A050401, A050402, A110201, A2302).
  • Annex B: Added 1 new term (B24) and modified 1 term (B05).
  • Annex C: Added 2 new terms (C1010, C1011).
  • Annex D: Added 2 new terms (D1108, D19).
  • Annex E: Added 65 new terms (E012208, E012209, E0140, E0141, E0142, E0143, E014301, E014302, E0207, E0208, E0311, E0312, E0313, E050102, E0519, E0753, E083804, E083903, E0845, E0846, E0847, E0848, E0849, E0850, E0851, E0852, E0853, E0907, E0908, E090801, E090802, E0909, E0910, E1034, E1035, E1108, E1109, E120203, E120204, E120205, E120206, E120207, E120208, E120209, E1418, E1520, E1636, E1637, E1638, E1639, E1640, E1641, E171602, E171603, E1724, E1725, E1726, E1805, E2121, E2122, E2123, E2205, E2206, E2207, E233802) and modified 11 terms (E0309, E0506, E2337, E082901, E1025, E120501, E1618, E1621, E1625, E180102, E2103). Updated NCIt mapping for 2 terms (E082901, E1621).
  • Annex F: Added 2 terms (F1006, F1007).
  • Annex G: Added 1 term (G07003). Updated NCIt mapping for 1 term (G04094).

March 5, 2021 Update: IMDRF 2021 Maintenance

  • Annex A: Modified 2 terms (A0908, A15)
  • Annex B: Added 1 new term (B23) and modified 1 term (B16).
  • Annex C: Added 1 new term (C23) and modified 1 term (C19).
  • Annex D: Added 4 new terms (D0107, D0108, D1501, D18) and modified 3 terms (D10, D1107, D12).
  • Annex E: Added 2 new terms (E2120, E2342) and modified 23 terms (E0105, E010904, E0115, E0135, E0304, E0508, E0710, E0749, E082901, E0835, E0843, E1101, E1305, E1409, E1412, E1625, E1904, E1905, E2106, E2119, E231201, E231501, E2336). Updated NCIt mapping for E1001.
  • Annex F: Modified 5 terms (F14, F2204, F2305, F25, F26)
  • Annex G: Modified 9 terms (G02011, G0201501, G02020, G03006, G0405202, G04095, G04130, G0600102, G0600601). Updated NCIt mapping for G03008 and G04077.
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