Any bank, credit union or any other entity that currently meets the IRS standards for being a trustee or custodian for an IRA or Archer Medical Savings Account (MSA) can be an HSA trustee or custodian. The law also allows insurance companies to be HSA trustees or custodians. Most major Health Insurance companies, (Aetna, Blue Cross/Blue Shield, UnitedHealthcare, etc.) offer HSA’s.