Convenient Care Clinic Convenient Care Clinic 18750 SE Stark St. Portland, Oregon 97233 Fax: 503-666-6745 To contact the clinic call 503-666-6717 Hours 9 a.m. to 7:30 p.m., Monday-Friday 9 a.m. to 4 p.m., Saturday-Sunday Walk-in visits for adults and children. Physicians Luther W. Johansen, MD John S. Loomis, III, MD Ronald D. Rohlfing, MD Nurse Practitioners Stephanie O'Conner, FNP Marilyn Sue Merritt, FNP View Larger Map Health Plans Accepted Most major health plans are accepted. Please call to verify if a particular insurance plan is accepted.