9654 Sparta Ave NW, Sparta, MI 49345, (616) 887-7389


Comfort and convenience are the hallmarks of Knowlton & Masson Dentistry's office operations. To ensure your convenience, below is the information you need about our hours, location, appointment scheduling, insurance acceptance and billing.

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

Click here for door to door driving directions


We know you have many choices when choosing a Dentist in Sparta, MI so we have made requesting an appointment a simple process via our Web site. If, for any reason you cannot keep a scheduled appointment, or will be delayed, please call us as soon as possible.

Emergency Services
Whether you are a patient of record or have never been seen here before, it is our philosophy that patients be seen the same day that they call, and we make every effort to do so during regular business hours (M-Th 8AM-5PM). 616-887-7389

After hours please feel free to call:

  • Dr. Andrew Knowlton: 616-887-8361
  • Dr. Jordan Masson: 616-915-7791

For after hour calls, if necessary, our doctors will arrange to see you at the office and will do so for patients of record, or for patients who are calling for the first time. 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.

Insurance and Billing

We offer the following payment options, which will help you maintain your optimal dental health:

  • Payment in full is expected on the day of service.
  • Payment Plans: We are happy to offer interest free payment plans 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

We accept cash, personal checks, VISA, and MasterCard.

Dental Insurance
Employer paid dental benefits, commonly referred to as “dental insurance”, have become commonplace. All policies do have limitations, however, and do not cover 100% of the fees charged. For this reason, a copy of your dental benefit booklet will be helpful to estimate your expected benefits. If your plan is unknown to our office, and a benefit booklet is not available, we will ask you to pay at the time of service, and for you to be reimbursed by 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.

Flexible Reimbursement Plans
If your employer has a reimbursement plan, such as Flexible Spending Accounts and/or Direct Reimbursement plans that repay you for completed dental procedures, we will provide you with a printed receipt when your dental work is completed.

Payment Options

We accept checks, cash or credit cards. We also offer a flexible payment plan. Please see our Financial Coordinator for details. We are happy to file insurance for your reimbursement as long as you are free to choose your own dentist.

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.

We will continue to be committed to providing the best, individualized, and comprehensive care that we can for our valued patients.