Our Doctors

Dentist in Cincinnati, OH

All our professionals at Fennell, Yoxthimer, and Associates, DDS, Inc. maintain the highest levels of accreditation and pursue ongoing education to stay abreast of the latest trends in dentistry.

James Fennell, DDS James Fennell, DDS

Dr. Fennell grew up in Norwood Ohio, graduating from Norwood High School in 1972. After getting his undergraduate degree in Zoology from Miami University he attended and graduated from The Ohio State Dental School in 1979. He completed his residency at Womack Army Hospital, Ft. Bragg North Carolina the following year and then spent the next 3 years in Goeppeingen, Germany where he served as Officer in Charge of dental services for the soldiers and their families of the 1st Infantry Division. He earned the Expert Medical Field Badge and the Army Commendation Medal while in Germany.

Dr. Fennell's interest in the field of dental implantology began as a dental implant research assistant while a student at Ohio State. He began his formal training in implants with the Midwest Implant Institute in 1984,earning the Outstanding Extern Award in 1993. He has been actively placing and restoring implants for almost 20 years and has earned Diplomate status in the American Board of Oral Implantology. Dr. Fennell is certified to administer IV Sedation and maintains his certification in Advanced Cardiac Life Support (ACLS)

Professional affiliations include:

  • American Board of Oral Implantology -- Diplomate
  • American Academy of Implant Dentistry -- Associate Fellow, with credentials in both placing and restoring dental implants
  • Midwest Implant Institute -- Graduate and Fellow Cincinnati Dental Society
  • Ohio Dental Association
  • American Dental Association

Rob Yoxthimer, DDS Rob Yoxthimer, DDS

Dr. Yoxthimer, a native of Loveland, Ohio, joined the practice in July 2007. After receiving his BS in Chemistry in 1998 from Xavier University he worked for Procter & Gamble for five years as a research chemist.  Following God's prompting, he changed careers and attended The Ohio State University College of Dentistry where he earned his Doctor of Dental Surgery degree.  Dr. Yoxthimer has additional certification to administer IV Sedation, so that his patients can have access to comfortable, anxiety-free dental care.  Including IV sedation, his areas of interest in the dental field include pediatrics, management of the medically compromised patient, oral pathology, dental esthetics, endodontic and periodontal dentistry, and tobacco cessation programs. Dr. Yoxthimer is a member of the American Dental Association, the Ohio Dental Association, the Cincinnati Dental Society and the Christian Medical and Dental Association.  Dr. Yoxthimer maintains his certification in Advanced Cardiac Life Support (ACLS).

Dr. Yoxthimer's other interests include spending time with family, photography, camping, hiking, canoeing, traveling, and woodworking.  He and his wife, Bekah, have three young sons, Tyler, Grant and Zane. Furthermore, he and his wife have spent time in the recent past on short term dental missions work in Honduras.

Nathan Fennell, DDS

Dr. Nate Fennell grew up in Cincinnati, Ohio, graduating from Milford High School. He attended Samford University in Birmingham, Alabama, where he graduated Summa Cum Laude with a Bachelor's degree in Biology. He then attended the Ohio State University College of Dentistry and graduated Magna Cum Laude with his Doctor of Dental Surgery degree. Dr. Fennell enjoys a wide range of general dentistry, including restorative dentistry, pediatric dentistry, fixed and cosmetic dentistry, endodontics, and oral surgery. Dr. Fennell is certified to administer IV sedation and he embraces the challenge of treating the nervous dental patient. He also has training in treating the medically compromised patient.

When not treating patients, Dr. Fennell enjoys spending time with his wife Ashleigh and their young daughter Evelyn and son Keegan. He also enjoys spending time with family and friends, the outdoors, and playing golf.

Contact Us

Send us an email today!

Our Location

5451 Montgomery Rd. Cincinnati, OH 45212

Hours of Operation

Our Regular Schedule

Fennell, Yoxthimer, and Associates, DDS, Inc.


8:00 am-5:00 pm


8:00 am-5:00 pm


8:00 am-5:00 pm


8:00 am-5:00 pm


8:00 am-2:00 pm


8:00 am-2:00 pm

*1 Sat. per month