US · guidance
CMS SOM App. C, Tag D5557
§493.1271 Standard: Immunohematology
(d) Retention of Samples of Transfused Blood. According to the laboratory’s
established procedures, samples of each unit of transfused blood must be retained
for further testing in the event of transfusion reactions. The laboratory must
promptly dispose of blood not retained for further testing that has passed its
expiration date.
Interpretive Guidelines §493.1271(d)
There is no specific timeframe for retaining donor and recipient blood samples.
However, it is common practice to keep these samples for a minimum of seven days after
each transfusion in case there is a need for retesting.
History
Rev. 233; Issued: 09-12-25; Effective: 09-12-25; Implementation: 09-12-25
Provenance
- Source
- cms.gov
- Retrieved
- 2026-07-22
- Edition
- som-2026-07-22
- Content hash
61b11ffc191e9b2c2a376854fea6160efb30220bd74ed942cba9da7ed6e40925
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