Spectrum Plasma San Marcos, TX

Donating at Spectrum Plasma San Marcos, TX

Spectrum Plasma San Marcos, TX is a Spectrum Plasma donation center at 137 N Guadalupe St in San Marcos, TX. You can reach it on 512-518-6262. It opens 4 days a week — check the table for the day you plan to visit.

Who can donate here

Spectrum Plasma asks that you weigh at least 110 lb. You will also need photo ID, proof of your Social Security number, and proof of your current address. A tattoo or piercing in the last 4 months means waiting before you can donate.

When it is open

This location opens 4 days a week, closed Fri, Sat, Sun. Across the week the doors are open from 9am at the earliest to 12pm at the latest. Check the table above for the exact day you plan to visit. Returning donors can usually walk in, but a first visit is best booked ahead.

Before you go

Drink plenty of water and eat a full meal in the few hours beforehand. Low iron and dehydration are the two most common reasons people are turned away on the day. Avoid alcohol for 24 hours and fatty food on the day itself. Hours and requirements are set locally and do change, so it is worth a quick call before you travel.

How this center compares locally

San Marcos has 2 listed plasma centers in total. Other companies with San Marcos locations: Grifols.

Nearby centers

• Grifols Biomat USA San Marcos, TX — 1400 I 35 Frontage Rd

Where this fits

See also all plasma centers in San Marcos, Texas directory and all Spectrum Plasma locations.

Location details verified against PlasmaLedger's directory on 2026-09-01. Confirm hours with the center before travelling.