expired vaccine used; This spontaneous case was reported by an other health care professional and describes the occurrence of EXPIRED PRODUCT ADMINISTERED (expired vaccine used) in a 77-year-old male patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch nos. 038B21A, 029L20A and 025320-2A) for COVID-19 vaccination.     Previously administered products included for Product used for unknown indication: Vaccine and Influenza (Series 1) on 11-Nov-2021. Past adverse reactions to the above products included No adverse event with Vaccine and Influenza. Concurrent medical conditions included Proteinuria, Osteoarthritis (Knee, right severe), Lung nodule (3 mm left apical non calcified), Splenomegaly, Recurrent urinary tract infection (recurrent), Abdominal bloating, Renal insufficiency, Vitamin D deficiency, Thyroidectomy (right lobe), Papillary thyroid cancer, Superficial gastritis (chronic), Abdominal pain (right upper quadrant), Epididymitis (left), Testicular pain (left), Testicular swelling (left), UTI, Non-Hodgkin's lymphoma NOS (gastric with splenomegaly), GERD, Hyperlipidemia, Hypertension, Thyroid nodule (left), Hydronephrosis (bilateral mild), Deep venous thrombosis NOS (Right upper extremity), BPH, Prostate cancer, Heart disease, unspecified, Drug allergy (LEVAQUIN (Moderate)) and Ventricular bigeminy. Concomitant products included LISINOPRIL, OMEPRAZOLE, HERBAL NOS, INOSITOL, LYCOPENE, MINERALS NOS, RESVERATROL, VITAMINS NOS, XANTOFYL, ZEAXANTHIN (PHYTOMULTI), VITAMIN D3, ESZOPICLONE, MIRABEGRON (MYRBETRIQ), METOPROLOL SUCCINATE, COENZYME Q10 [UBIDECARENONE], ATORVASTATIN CALCIUM, HYDROCHLOROTHIAZIDE (HIDROCLOROTIAZIDE), ACETYLSALICYLIC ACID (ASPIRIN 81), ESZOPICLONE (LUNESTA) and CYANOCOBALAMIN (VITAMIN B 12 [CYANOCOBALAMIN]) for an unknown indication.   On 31-Dec-2020, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) 1 dosage form. On 22-Jan-2021, received second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) dosage was changed to 1 dosage form. On 28-Sep-2021, received third dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) dosage was changed to 1 dosage form. On 28-Sep-2021, the patient experienced EXPIRED PRODUCT ADMINISTERED (expired vaccine used). On 28-Sep-2021, EXPIRED PRODUCT ADMINISTERED (expired vaccine used) had resolved.      DIAGNOSTIC RESULTS (normal ranges are provided in parenthesis if available): On an unknown date, Angiocardiogram: moderate plaque (abnormal) moderate plaque seen on CT imaging. On an unknown date, Biopsy skin: results not reported (Inconclusive) Results not reported. On an unknown date, Colonoscopy: results not reported (Inconclusive) Results not reported. On an unknown date, Computerised tomogram thorax: results not reported (Inconclusive) Results not reported. On an unknown date, Prostatic specific antigen: increased (High) Increases. On an unknown date, Rectal examination: results not reported (Inconclusive) Results not reported.     For mRNA-1273 (Moderna COVID-19 Vaccine) (Unknown), the reporter did not provide any causality assessments.   Other lab data includes, Observation and evaluation for suspected exposure to other biological agent, Lab exam, Preoperative examination and Annual exam.