Skip to Content (Press Enter)
2003 46th Ave Greeley, CO 80634 Phone: 970-330-4600
Pediatric Dentist

About Us

Keith A. Van Tassell, D.D.S.

Dr. Keith (as his patients know him) loves working with kids. He was born in California and grew up in some small towns in Utah and Idaho. He graduated from Weber State University in 2000 and entered dental school that same year at Virginia Commonwealth University School of Dentistry in Richmond, Virginia. Dr. Keith graduated Magna Cum Laude in 2004 and was elected into the OKU dental honor society which is reserved for the top 10% of graduating dentists in the nation. He was also awarded the Pierre Fauchard Academy Certificate of Merit for outstanding academic achievements. After dental school, Dr. Keith attended the University of Nevada School of Medicine for a two year pediatric dental residency where he served as chief resident his final year.

Dr Keith is a Board Certified Pediatric Dentist. He dedicates himself to providing the best dental care possible for his patients, insuring that they have a positive and fun experience while learning to care for their own oral health.

Dr. Keith enjoys spending time with his family, being outdoors, running, and playing just about any sport. He and his wife have five children (four daughters and a son). They moved to Ft. Collins in August 2006 to begin his practice. They love the community and are proud to call Northern Colorado home.

Memberships and Professional Associations:

  • Diplomate American Board of Pediatric Dentistry
  • American Academy of Pediatric Dentistry
  • Colorado Dental Association
  • Larimer County Dental Society
  • Harmony Surgery Center

Zachary Alleman, D.D.S.

Dr. Zach grew up in The Colony, Texas, a suburb north of Dallas. He earned his bachelor’s in Exercise Science from Brigham Young University and pursued his dental training at Baylor College of Dentistry.

After receiving his Doctorate of Dental Surgery, he decided to complete his residency at Baylor where he could take advantage of its strong Pediatric Dentistry program, which is affiliated with Children’s Health Dallas and Texas Scottish Rite Hospitals. Interacting with these incredible hospitals gave him extensive training with managing patients with special healthcare needs.

Pediatric dentistry is a perfect fit for Dr. Zach, who has always been surrounded by children. He is the fifth of eight children, father of two, and uncle to 25 nieces and nephews. He loves providing quality and fun treatment to ensure each child gets off to a terrific start with their oral health.

When Dr. Zach isn’t in the office, he likes to spend time outdoors with his family. He also enjoys cycling and playing basketball, tennis, and volleyball. He’s also an avid reader.

Dr. Zach and his family are excited to call Northern Colorado home.

Memberships and Professional Associations:

  • Diplomate American Board of Pediatric Dentistry
  • American Academy of Pediatric Dentistry
  • Colorado Dental Association
  • Larimer County Dental Society
  • Harmony Surgery Center

Dr. Craig Seager

Dr. Craig Seager grew up in the towns of Houston, Texas and Denver, Colorado. He went to Brigham Young University where he completed his Bachelor of Science degree in 2003. He then attended the University of Texas Health Science Center in San Antonio where he received his Doctorate of Dental Surgery degree in 2007, graduating with Honors in Research. While at the University of Texas, he was elected for and served two years as the president of the Health Science Center’s Student Government Association.

In the summer of 2007, Dr. Seager began his residency in orthodontics at the University of Texas Health Science Center in Houston where he earned his Master of Science degree in Dentistry in 2009. During his residency, Dr. Seager received extensive training in both adolescent and adult orthodontic diagnosis and treatment. Other areas of his training have included Invisalign®, 3D imaging, growth analysis, and TMJ therapy. Dr. Seager is also fluent in Spanish, which aids in optimal communication with our Spanish-speaking patients.

Dr. Seager is a Diplomate of the American Board of Orthodontics This board certification is designation held by only 30% of orthodontists. He is also an active member of the American Association of Orthodontics and the Colorado Dental Association. He serves on the University of Colorado Health Cleft Palate Team. Dr. Seager was selected as a 5280 Top Dentist 2017.

In 2001, Dr. Seager married his wife, Melissa, and they now have three beautiful daughters. After enjoying his childhood growing up in the Denver area, Dr. Seager always knew that he wanted to live and practice in Colorado. As the Seager family searched for the best place to raise a family, Northern Colorado was the perfect fit with family-centered communities and outdoor recreation. Dr. Seager enjoys skiing, golf, running, fly-fishing, and camping with his wife and daughters.

Dr. Baer

Oral Surgeon
Dr. Baer and his family

Dr. Baer was born and raised in Littleton, CO where he enjoyed all of the beauties of our mountains with his parents and 5 siblings. He went on to pursue his bachelors of science in Neurophysiology at BYU. After his four years there he returned home to Colorado to attend Dental School at CU. While in Dental school he pursued additional research centered on surgery and dental implants. He published multiple articles in the Journal of Oral and Maxillofacial Surgery and a book on sinus bone grafting. After dental school he went on as a teaching fellow in the department of oral and maxillofacial surgery in Ohio.

He was thrilled to come back to Colorado to practice dental surgery, and also enjoy the mountains. Out-side his practice, his time is largely spent with his wife, two daughters and son. He doesn't get to spend as much time in the mountains, but is happy to trade all of that for every minute of quality time with his family.

Dr. Amy Banks

Dr Amy Banks

Dr. Amy grew up in Colorado Springs near the Garden of the Gods. She attended the University of Colorado at Boulder and graduated with her DDS from the University of Colorado School of Dental Medicine. After dental school, Dr. Amy finished a 1-year Advanced Education in General Dentistry residency in Seattle, Washington. She then spent several years as a general dentist in both the public health and private practice sectors before deciding to specialize as a pediatric dentist.

Dr. Amy completed her pediatric dental residency program at the Children’s Hospital of Wisconsin, where she had the honor of serving as Chief Resident in her last year. Working with children has made her even more passionate about dentistry, and she couldn’t be more excited to dedicate her service to kiddos. She adores treating tiny smiles and providing a safe, inspiring environment for kids to learn about their dental health.

Outside of caring for her patient family, Dr. Amy loves spending time with her husband and their pup. You can find her exploring local food spots, enjoying time outdoors, going to live sporting events, and traveling.

Memberships and Professional Associations:

  • American Academy of Pediatric Dentistry
  • American Dental Association
  • Colorado Dental Association
  • Weld County Dental Society

Admin Team


I was born in Vail and grew up in Greeley. I love spending time with my husband, 2 kiddos and our 2 fur babies! We enjoy camping, boating and 4 wheeling. I love Colorado summers and lazy days at the lake!


I was born and raised in Northeast Colorado. I enjoy being outside walking, gardening and hiking with my husband in the beautiful Rocky Mountains. Spending time with my family means the world to me!!!!