Our Location

Knowlton & Masson Dentistry

9654 Sparta Ave NW

Sparta, MI 49345

(616) 887-7389

Office Hours

Monday:          08:00 AM - 05:00 PM

Tuesday:          08:00 AM - 05:00 PM

Wednesday:    08:00 AM - 05:00 PM

Thursday:        08:00 AM - 05:00 PM

Friday: Closed

Saturday: Closed

Sunday: Closed

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Please contact us at 616-887-7389 to schedule an appointment.

Office Hours - Emergency Services

If you have a life-threatening or severe injury, call 911 or go directly to the nearest hospital emergency room.

For all other dental emergency needs related to pain or injury, we make every effort to schedule emergency services same-day during regular business hours (M-Th 8AM-5PM). Please contact us at 616-887-7389.

After Hours Emergency Services

Dr. Andrew Knowlton: 616-887-8361

Dr. Jordan Masson: 616-915-7791

In most instances, the doctors will call in a prescription to get you comfortable and will see you in the office only if the situation calls for an office visit. Please note that you may be billed after hours fees based on the service provided.

Insurance and Billing

We accept and will bill most traditional insurance plans. Please contact our office to verify acceptance of your plan.  We will gladly complete and file all necessary forms as a courtesy to you. You are responsible for your balance at all times, regardless of what your insurance company does or does not pay for. We reserve the right to bill you for any unpaid balances.

Payment Options

Payment in full is expected on the day of service. We accept checks, cash or credit cards.

We also offer a flexible payment plan of interest free payment for 3, 6, and 12 months, depending upon the amount of treatment to be rendered. Completion of a credit application and credit approval is required. The entire process can be completed in our office and takes approximately 10 minutes. More information at www.carecredit.com. Please contact our financial coordinator at 616-887-7389 for details.


Our Location

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Hours of Operation

Our Regular Schedule


8:00 am-5:00 pm


8:00 am-5:00 pm


8:00 am-5:00 pm


8:00 am-5:00 pm







History of Our Practice

Dr. Gary Cook started our practice in 1975. Dr. Cook grew up in Kent City and attended the University of Michigan Dental School. After 4 years of general practice, he sold his practice to Dr. Lee McFall in 1979, and went back to U of M to specialize in Pediatric Dentistry. Dr. Cook later returned to Grand Rapids to practice in Pediatrics.

Dr. McFall graduated from Sparta High School in 1970, Albion College in 1974 and the University of Michigan in 1978. He practiced in Sheridan, Michigan for one year as an associate before buying Dr. Cook’s practice at 9161 Sparta Avenue. In the beginning, he practiced with one chair for himself and one for a hygienist. He had 3 employees: a hygienist, an assistant and a receptionist. In 1981 Dr. McFall bought his first computer system to be used to print and track insurance claims. The practice grew and a second chair for the doctor’s patients was added. In 1985 a second computer system was installed and was still used mainly for printing insurance forms at the reception desk. The practice continued to grow and a 4th chair was added for a second hygienist. By this time there were 10 employees.

In 1995 a networked computer system was installed with a dedicated file server, and with software that could be used in the treatment rooms as well as the front desk. This computer and software system was the beginning of a long-range technology plan to completely change how the practice would deliver dental care. We began using this system at the front desk to send insurance claims electronically. At that time we were one of the first offices in West Michigan using electronic submission of insurance claims for our patients. In January of 1997 a complete remodeling of the office was done and an intraoral camera system was installed to use for patient education and for photos to send to insurance companies for our patients.

In July of 1999 Dr. Andrew Knowlton joined our practice. Dr. Knowlton graduated from Belding High School in 1991, Andrews University in 1995, and University of Michigan Dental School in 1999. In the year 2000 we placed computers in the treatment rooms to more accurately and efficiently record treatment. We were also able to schedule appointments in the treatment rooms. This shortened the amount of time it took for our patients to “check out” after treatment. At this time we had 14 employees.

The practice grew steadily between 2000 & 2004 and in October of 2004, Dr. Knowlton & Dr. McFall became equal partners. The name of the practice changed from C. Lee McFall DDS PC to Knowlton & McFall Dentistry, PLLC. In 2005 we added a 5th treatment room but by that time we actually needed even more space than the rented building had room for. In 2006 we purchased land at 9654 Sparta Ave. and began plans for a new office. The office was completed in late 2008 and is one of the most technologically advanced general practices in West Michigan. Digital records, digital x-rays, and digital photographs are all utilized in the new facility. We believe it is a beautiful and comfortable place for patients to come for their oral health care.

In 2013, Dr. McFall was searching for a dentist to replace him as he was nearing retirement.   Dr. Jordan Masson fit the bill.  Dr. Masson graduated from Lake Orion High School in 2000, Western Michigan University in 2004, and the University of Detroit Mercy School of Dentistry in 2008.  He was first hired as an associate dentist, but in July of 2014, Dr. Masson purchased Dr. McFall’s portion of the practice and officially became equal partners with Dr. Knowlton.  The name of the practice was changed from Knowlton & McFall Dentistry, PLLC to Knowlton & Masson Dentistry, PLLC.

Though our practice has evolved over the years, we remain committed to providing the best, individualized, and comprehensive care that we can for our valued patients.