To schedule an appointment contact us at (269) 312-1446. For billing questions email: billingdepartment@serenesolutions.net. Visit one of our two locations in Portage or Kalamazoo! Serene Solutions in Portage is conveniently located at the corner of Lovers Lane and Milham Ave at: 1125 E. Milham Ave Ste B Portage, MI 49002. Our Kalamazoo location is located in the Atriums on Westnedge at 4341 S. Westnedge Suite 1106 Kalamazoo, MI 49008.