NBSD specializes in performing beside swallowing evaluations using a digital fiberoptic

Our speech-language pathologists are expert endoscopists with a 99.97% success rate in passing the scope and completing the evaluation. NBSD uses high fidelity, state-of-the-art equipment manufactured by ATMOS Medical, Inc. Evaluation reports and substantiating visual pictures are placed in the patient’s chart by day end.

Providing mobile expert and evidence-based swallow diagnostic services to patients in
the North Bay area


Evaluations are completed in a comfortable, natural eating position.


Determine safest, least restrictive diet with evaluation of airway protection function and swallow peristalsis function.


Provides medical professionals, patients, caregivers and families with education on the rehab of dysphagia.



Kathryn Williams, CScD, CCC-SLP
Kathryn Williams, CScD, CCC-SLPOwner
Kathryn Williams is a nationally certified and California state licensed speech-language pathologist with over 9 years of experience of working with patients with dysphagia in various medical settings. She is the owner/president and endoscopist for NBSD.

Kathryn earned her master’s degree in Communication Disorders and Sciences at University of Oregon and her clinical science doctorate from Rocky Mountain University of Health Professions in 2020. Continued education experience has focused on advancing knowledge and skills in dysphagia and she is also an active member of the American Speech-Language-Hearing Association special interest group of Swallowing and Swallowing Disorders.