What patients are saying
Overall rating
4.94
Average wait time
4.66
Bedside manner
4.97
“Very personable, listened to my issue and rapid response to my prognosis! Very professional, very clean, and would highly recommend!”
Eli C.March 20, 2026
“Very positive experience with NP Mast. Very kind despite my being distressed.
Took a detailed history, examination and skin biopsy. Was understanding of wider psychosocial stressors. Let me know there were other clinics available closer to my home. Overall positive experience!”
Amanda M.March 20, 2026
About William Mast
William J. Mast, FNP-BC, is a board-certified Family Nurse Practitioner serving our Bonham and Greenville offices. He earned his Associate's degree from Grayson College, his Bachelor's degree in nursing from the University of Texas at Tyler, and his Master's in Nursing from the University of Texas at Arlington. Before becoming an FNP, William worked as a trauma nurse for 10 years, gaining valuable experience in acute care.
William is a member of the Texas Nurse Association and the American Nurses Credentialing Center. Raised in North Texas, he spent much of his childhood in Bonham and is passionate about serving the community and improving the health of patients throughout the area. Outside of work, William enjoys spending time with his wife, daughter, and son, engaging in outdoor activities, and is actively involved in his local church.
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Office locations
1 of 2
Education and background
Practice names
Board certifications
- American Nurses Credentialing Center
Education and training
- University of Texas at Arlington, Master's in Nursing
- University of Texas at Tyler (Bachelor's)
- Grayson College (Associate's)
Professional memberships
- Texas Nurses Association
Languages spoken
- English
Provider's gender
Male
NPI number
1659089811
Patient reviews
All reviews have been submitted by patients after interacting with the practice.
Overall rating
4.94
Wait time
4.66
Bedside manner
4.97
Your trust is our top concern, so providers can't pay to alter or remove reviews. We also don't publish reviews that contain any private patient health information. Learn more here
401 reviews
Most relevant
The office staff and Dr were all very nice and professional. I was seen in a timely manner, and the appointment went great.
April 16, 2025Rebecca B.Verified patient
Very nice people. Very kind with some not so good news. Very pleased with the way I was treated.
October 8, 2025Darrin B.Verified patient
1st visit: removed cyst right away- suggested 6months to check body for molds, etc. smiled. Friendly staff
June 10, 2025Brenda B.Verified patient
The office was closed when I arrived and thw hours state not open tell Friday
February 25, 2026Hannah C.Verified patient
I will definitely go back. Matt was terrific and my problem was taken care of immediately. The staff was very pleasant.
September 18, 2024Genevieve M.Verified patient
William made me feel very comfortable & explained everything clearly. I received excellent care & highly recommend!
November 22, 2024Karla D.Verified patient
I've been to this office 3 times and it was a very good experience all the way around.
Less than 6 months agoInitials hidden
Will is fantastic. He explains everything and takes time to ask questions too. Highly recommend.
May 7, 2025Brandon C.Verified patient
Took time to listen to my concerns and addressed them immediately! Highly recommend this office and provider.
October 17, 2024Rachael D.Verified patient
The Dr. Mast was extremely friendly, attentive and Immediately had a plan of action. Awesome experience.
November 12, 2024Kaila S.Verified patient
Everyone was professional and friendly. I had a wonderful experience and would highly recommend this practice.
July 2, 2024Kajsa K.Verified patient
The staff was all very friendly. I would highly recommend William Mast. He was easy to talk to and explained everything.
June 9, 2023Carolyn L.Verified patient
I would highly recommend this practice to anyone. William was by far the best doctor I have dealt with in years.
March 21, 2024Heather M.Verified patient
Dr. Mast was a great communicator and listener. All his staff were very welcoming. Highly recommend.
December 16, 2024Jana W.Verified patient
He was very patient kind and thorough. Very eager to help, very helpful and answered all my questions
November 8, 2024Diane D.Verified patient
Fast, friendly, thorough and knowledgeable. Everything I expect from a health care professional. I’ll be back.
December 4, 2023Lee B.Verified patient
I was very satisfied with my appointment, friendly staff, and all of my questions answered without feeling rushed!
June 6, 2023Christi S.Verified patient
I was super impressed with the understanding of the issues and the time that was taken to address them!!!
April 11, 2024Nathaiel M.Verified patient
Great experience and I highly recommend. I was treated very professionally and all my concerns were addressed!
October 31, 2023Reanna H.Verified patient
NP Mast was great! Very friendly, explained everything in clear detail so I understood what was happening
February 24, 2024Tia M.Verified patient
Very friendly and clean office.The Dr was very friendly and talkative to his patients.
March 22, 2025Travis B.Verified patient
William mast always is friendly and helpful listens to my concerns and would recommend to anyone
September 11, 2024Jeffery P.Verified patient
Great nurse practitioner, knew exactly what was wrong and took care of it right away. Great personality too!
September 15, 2023Roxanne M.Verified patient
The staff were very friendly and professional. The wait time was less than 5 minutes.
February 17, 2025Deborah H.Verified patient
Will Mast and his assistant Georgia have a great bedside manner and took great care of me!
November 8, 2024Angie S.Verified patient
Will is always so friendly, and listens to my concerns. He addresses my issues immediately.
July 14, 2024Lisa K.Verified patient
The office can be difficult to find but overall a great experience and great physician!
September 28, 2024Megan W.Verified patient
The office and staff were great. Only issue I have is with Zocdoc. I was sent way too many notices!
March 22, 2023Robert Y.Verified patient
We appreciated the fact that for the first time, someone is looking for a reason for the itch/rash
More than 1 year agoJS
Loved William J. Mast FNP-BC. He was wonderful. Definitely recommend!
May 1, 2025Mikki B.Verified patient
William Mast is personable, knowledgeable, helpful and thorough. So thankful to have found him.
June 25, 2023Marianna M.Verified patient
I felt very relaxed and he explained everything thoroughly. Answered all my questions
May 2, 2024Beverly R.Verified patient
Very friendly and professional at. What he did,very friendly staff, highly recommended
November 17, 2023Buster G.Verified patient
Will and his medical assistant Kathy were professional and caring.
Great staff!
May 22, 2024Patricia F.Verified patient
Very friendly staff. Thorough examination and follow- up
June 30, 2025Carol A.Verified patient
good front office staff, Dr was punctual , courteous, and thorough
February 7, 2025Norman H.Verified patient
All staff very friendly...Doctor was very passionate and caring and honest.
July 17, 2024Larysa T.Verified patient
Dr Mass was awesome. Very personable and made you feel at ease! I’ll definitely be back!
April 27, 2023Lisa D.Verified patient
William was friendly, listened well, and treated my issue quickly and very professional.
February 14, 2023Gary H.Verified patient
Great communication, helpful information, good experience all around
November 7, 2024Jacob S.Verified patient
It was an awkward visit for me but he made me feel comfortable!
More than 1 year agoInitials hidden
Friendly, knowledgeable, good bedside manner, excellent service
November 14, 2024Anita J.Verified patient
Great experience! Loved Will and staff. Professional, kind and friendly.
March 21, 2024Terry H.Verified patient
Everything went smoothly, nice staff and Dr. Mast was awesome.
November 23, 2024Philip G.Verified patient
Super fast visit, friendly staff and great follow up. Would highly recommend.
October 19, 2023Joshua I.Verified patient
Great experience. Very knowledgeable and great bedside manner!
November 13, 2024Brian B.Verified patient
Great experience. Listened and was very thorough.
May 21, 2025Randy C.Verified patient
Great provider! Helped explain things to our son and gave some helpful advice
August 22, 2023Anji T.Verified patient
Easy to schedule appt. Short wait time, great care and options.
August 3, 2024Diana G.Verified patient
They were super helpful and really nice. It was a good experience.
June 9, 2024Khloe F.Verified patient
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How soon can I make an appointment with William Mast?
Generally, William Mast has appointments available on Zocdoc within 1 week. You can see William Mast's earliest availability on Zocdoc and make an appointment online.
Is William Mast accepting new patients?
William Mast generally accepts new patients on Zocdoc. You can see William Mast's earliest availability on Zocdoc and schedule an appointment online.
Does William Mast accept my insurance?
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Can I make an appointment with William Mast online?
Yes, you can make an appointment online with William Mast using Zocdoc. It’s simple, secure, and free.
What practice does William Mast work with?
William Mast works with Preferred Dermatology.
Where is William Mast's office located?
William Mast has 2 office locations, including in Greenville and Sherman, view full addresses on William Mast's profile.
Which board certifications does William Mast have?
William Mast is certified by American Nurses Credentialing Center.
What are common reasons for patients to see William Mast?
William Mast frequently sees patients for Acne, Annual Skin Screening, Dermatology Consultation, Hair Loss, and Prescription / Refill. You can see other visit reasons for William Mast on their profile.
What languages does William Mast speak?
William Mast speaks English.
How do patients rate William Mast in reviews?
401 patients have reviewed William Mast. The overall rating for this doctor is 4.94/5. They have a 4.97/5 rating for bedside manner and a 4.66/5 rating for wait time. You can read individual reviews and ratings on their profile.