SIRVA (shoulder injury resulting from vaccine administration); Pain in upper left arm; Suspected that injection was administered into her shoulder capsule instead of intramuscularly; Shoulder pain; This spontaneous case was reported by a physician and describes the occurrence of SHOULDER INJURY RELATED TO VACCINE ADMINISTRATION (SIRVA (shoulder injury resulting from vaccine administration)), INCORRECT ROUTE OF PRODUCT ADMINISTRATION (Suspected that injection was administered into her shoulder capsule instead of intramuscularly), ARTHRALGIA (Shoulder pain) and PAIN IN EXTREMITY (Pain in upper left arm) in a 61-year-old female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch nos. 021B21A and 010A21A) for COVID-19 vaccination.     Concurrent medical conditions included High cholesterol. Concomitant products included ACETYLSALICYLIC ACID (BABY ASPIRIN) for Cholesterol, ATORVASTATIN for High cholesterol, ATENOLOL for Supraventricular tachycardia, VITAMIN D NOS for Vitamin D deficiency, CENTRUM SILVER +50 for Vitamin deficiency.   On 28-Feb-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Other) 1 dosage form. On 28-Mar-2021, received second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Other) dosage was changed to 1 dosage form. On 28-Mar-2021,  after starting mRNA-1273 (Moderna COVID-19 Vaccine), the patient experienced INCORRECT ROUTE OF PRODUCT ADMINISTRATION (Suspected that injection was administered into her shoulder capsule instead of intramuscularly) and ARTHRALGIA (Shoulder pain). On 28-Mar-2021 at 11:45 AM, the patient experienced PAIN IN EXTREMITY (Pain in upper left arm). On an unknown date, the patient experienced SHOULDER INJURY RELATED TO VACCINE ADMINISTRATION (SIRVA (shoulder injury resulting from vaccine administration)). The patient was treated with IBUPROFEN for Pain, at an unspecified dose and frequency. On 28-Mar-2021, INCORRECT ROUTE OF PRODUCT ADMINISTRATION (Suspected that injection was administered into her shoulder capsule instead of intramuscularly) outcome was unknown. At the time of the report, SHOULDER INJURY RELATED TO VACCINE ADMINISTRATION (SIRVA (shoulder injury resulting from vaccine administration)) outcome was unknown and ARTHRALGIA (Shoulder pain) and PAIN IN EXTREMITY (Pain in upper left arm) had not resolved.        For mRNA-1273 (Moderna COVID-19 Vaccine) (Other), the reporter considered INCORRECT ROUTE OF PRODUCT ADMINISTRATION (Suspected that injection was administered into her shoulder capsule instead of intramuscularly) to be related. No further causality assessments were provided for SHOULDER INJURY RELATED TO VACCINE ADMINISTRATION (SIRVA (shoulder injury resulting from vaccine administration)), ARTHRALGIA (Shoulder pain) and PAIN IN EXTREMITY (Pain in upper left arm).    It was reported that on 28-Mar-2021, patient received her second dose of COVID vaccine in her left shoulder and three hours after vaccine she experienced intense pain (rated as 8/10 at first). Over the last few weeks pain had gotten better but hovering around a (4-5/10 rating). At this time patient's shoulder had improved some but it was suspected that injection was administered into her shoulder capsule instead of intramuscularly as prescribed. It was reported that the condition is rare but was known as shoulder injury resulting from vaccine administration (SIRVA).    Most recent FOLLOW-UP information incorporated above includes: On 25-Jun-2021: Follow up received on 25-jun-2021 is a significant information.