One Step Diagnostic – Kirkwood Address Street:11221 Katy Fwy #102 City: Houston State: Texas Zip Code:77079 Contact Phone: 832-551-2442 Fax:713-461-2004 Website: www.onestepdiagnostic.com Map & Directions 11221 Katy Fwy #102 Get Help!If you have been injured, please complete this form to have an office contact you. Notice: JavaScript is required for this content.