Plasma Donation Centers In San Marcos, TX

There are 2 plasma donation centers in San Marcos, plus 22 more within 50 miles. Companies in the area include Grifols, Spectrum Plasma.

Across Texas, the average new donor bonus is approximately $538.89, based on 55 donor reports statewide. Report your pay at a San Marcos center to help build local data.

Across Texas, returning donors report earning $100 to $160 per week. We don't have San Marcos-specific data yet — report your pay to help build local data.

Plasma companies operating in San Marcos include Grifols (1 location), Spectrum Plasma (1 location). Each company has its own pay structure, new donor bonuses, and loyalty programs.

Bring a valid government-issued photo ID (driver's license or passport), proof of your current address (utility bill, bank statement, or lease), and your Social Security card. You'll need to pass a basic health screening including vital signs and a protein/hematocrit test. Grifols (Biomat USA) centers accept walk-ins, but arrival before 10am on weekdays typically means shorter wait times. Eat a protein-rich meal and drink plenty of water before your visit.

You can donate plasma up to twice per week, with at least one day between donations. At 2 centers in San Marcos, most offer higher pay on your second weekly visit.