ORTHO4ALLAGES is committed to facilitating the accessibility and usability of its website,ortho4allages.com, for everyone. ORTHO4ALLAGES aims to comply with all applicable standards, including the World Wide Web Consortium's Web Content Accessibility Guidelines 2.0 up to Level AA (WCAG 2.0 AA). ORTHO4ALLAGES is proud of the efforts that we have completed and that are in-progress to ensure that our website is accessible to everyone.

If you experience any difficulty in accessing any part of this website, please feel free to call us at 415-435-0941 or email us at and we will work with you to provide the information or service you seek through an alternate communication method that is accessible for you consistent with applicable law (for example, through telephone support).

Contact Us


We always want to be available to talk with you and address your concerns. Please feel free to contact us during the following hours through our office phone number or our e-mail address. Hours will vary according to school and work holidays. We also offer late days, so please call for availability.

If you have a real orthodontic emergency after hours, call the office phone number. A recording will give you a phone number for one of our doctors on call.

Gast Orthodontics

Tiburon/Belvedere Office
1550 Tiburon Blvd.
Tiburon, CA 94920
Map & Directions

Office Hours
Monday – Thursday: 7:30 a.m. – 4:30 p.m.
Friday: 7:30 a.m. – 2:00 p.m.

Phone: 415-435-0941
E-mail: Tiburoninfo@ortho4allages.com
Fax: 415-435-1462

Gast & Nielsen Orthodontics

Novato Office
190 San Marin Dr.
Novato, CA 94945
Map & Directions

Office Hours
Monday – Wednesday: 8:00 a.m. – 5:00 p.m.
Thursday: 7:30 a.m. – 4:30 p.m.

Phone: 415-892-0736
E-mail: Novatoinfo@ortho4allages.com 
Fax: 415-892-9286