21 CFR 803.20
How do I complete and submit an individual adverse event report?
21 CFR 803.20 is the regulation titled “How do I complete and submit an individual adverse event report?” in 21 CFR Part 803, Medical Device Reporting. Since 2021, 14 FDA warning letters have cited it.
- Letters citing it
- 14 since 2021
- Jan 1 to Oct 30, 2026
- 3 against 3 on the same dates in 2025
- Most often cited with
- 21 CFR 803.17, in 14 letters
- Closed out
- 14% of these letters have a published close-out
Letters citing it, by year issued
All are medical device letters. 2026 runs to Oct 30, 2026. Pick a year to see its letters.
What FDA writes when it cites it
The finding headings that cite 21 CFR 803.20 most often, as written in the letters.
- 1 letterFailure to adequately develop, maintain and implement written MDR procedures to establish internal systems that provide for timely transmission of complete medical device reports, as required by 21 CFR 803.17(a)(3). For…
The regulation
Read the text of 21 CFR 803.20 (eCFR, as of Sep 1, 2026)
(a) What form must I complete and submit?
(1) If you are a health professional or consumer or other entity, you may submit voluntary reports to FDA regarding devices or other FDA-regulated products using the Form FDA 3500.
(2) To submit a mandatory report in written form, a user facility must use Form FDA 3500A.
(3) An electronic submission of a mandatory report from a user facility, importer, or manufacturer must contain the information from the applicable blocks of Form FDA 3500A. All electronic submissions must include information about the patient, the event, the device, and the “initial reporter.” An electronic submission from a user facility or importer must include the information from block F. An electronic submission from a manufacturer must include the information from blocks G and H. If you are a manufacturer and you receive a report from a user facility or importer, you must incorporate that information in your electronic submission and include any corrected or missing information.
(b) To whom must I submit reports and when?
(1) If you are a user facility, you must submit MDR reports to:
(i) The manufacturer and to us no later than 10 work days after the day that you become aware of information that reasonably suggests that a device has or may have caused or contributed to a death or
(ii) The manufacturer no later than 10 work days after the day that you become aware of information that reasonably suggests that a device has or may have caused or contributed to a serious injury. If the manufacturer is not known, you must submit this report to us.
(2) If you are an importer, you must submit MDR reports to:
(i) The manufacturer and to us, no later than 30 calendar days after the day that you become aware of information that reasonably suggests that a device has or may have caused or contributed to a death or serious injury or
(ii) The manufacturer, no later than 30 calendar days after receiving information that a device you market has malfunctioned and that this device or a similar device that you market would be likely to cause or contribute to a death or serious injury if the malfunction were to recur.
(3) If you are a manufacturer, you must submit MDR reports to us:
(i) No later than 30 calendar days after the day that you become aware of information that reasonably suggests that a device may have caused or contributed to a death or serious injury or
(ii) No later than 30 calendar days after the day that you become aware of information that reasonably suggests a device has malfunctioned and that this device or a similar device that you market would be likely to cause or contribute to a death or serious injury if the malfunction were to recur; or
(iii) Within 5 work days if required by § 803.53.
(c) What kind of information reasonably suggests that a reportable event has occurred?
(1) Any information, including professional, scientific, or medical facts, observations, or opinions, may reasonably suggest that a device has caused or may have caused or contributed to an MDR reportable event. An MDR reportable event is a death, a serious injury, or, if you are a manufacturer or importer, a malfunction that would be likely to cause or contribute to a death or serious injury if the malfunction were to recur.
(2) If you are a user facility, importer, or manufacturer, you do not have to report an adverse event if you have information that would lead a person who is qualified to make a medical judgment reasonably to conclude that a device did not cause or contribute to a death or serious injury, or that a malfunction would not be likely to cause or contribute to a death or serious injury if it were to recur. Persons qualified to make a medical judgment include physicians, nurses, risk managers, and biomedical engineers. You must keep in your MDR event files (described in § 803.18) the information that the qualified person used to determine whether or not a device-related event was reportable.
Text from eCFR as of Sep 1, 2026.
Cited alongside it
Regulations that appear in the same letters as 21 CFR 803.20.
- 21 CFR 803.17What are the requirements for developing, maintaining, and implementing written MDR procedures that apply to me?14 letters cite both
- 21 CFR 803.3How does FDA define the terms used in this part?14 letters cite both
- 21 CFR 803.50If I am a manufacturer, what reporting requirements apply to me?14 letters cite both
- 21 CFR 820.198Complaint files10 letters cite both
- 21 CFR 803.18What are the requirements for establishing and maintaining MDR files or records that apply to me?9 letters cite both
- 21 CFR 820.30Design controls9 letters cite both
- 21 CFR 820.100Corrective and preventive action7 letters cite both
- 21 CFR 803.12How do I submit initial and supplemental or followup reports?5 letters cite both
Latest letters citing it
The 3 letters citing 21 CFR 803.20 that FDA posted most recently.
- DevicesView O.N. Diagnostics, LLCVirtuOst and VirtuOst VFA softwareIssuedSep 1, 2026PostedOct 6, 2026
- DevicesView Lion Street Medical, d/b/a Pensar Medical LLCWoundPro Negative Pressure Wound Therapy (NPWT) System, WoundPro+ NPWT System, and MicroDoc (PocketDoc) Portable NPWT SystemIssuedAug 21, 2026PostedSep 22, 2026
- DevicesView Physitemp Instruments, LLCClinical Electronic Thermometers (TH-5; TH-5/AOP; TH-8; TH-8/AOP), Clinical Temperature Monitoring Probes (OT-1; ESO-1; RET-1; SST-1;…IssuedNov 12, 2025PostedMar 31, 2026
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Counts include every citation in a letter, as the Letters filter does. How this database is built.