Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Mountain Group LLC

Organization Sleep Disorder Diagnostic Clinic/Center · NPI 1144665100

Mountain Group LLC is a Sleep Disorder Diagnostic Clinic/Center in Duarte, California. Registered with an NPI since 2013.

In the registry since
2013
What do these letters mean?
LLC — Limited liability company
A form of business registration, not a clinical qualification.

See every abbreviation used in this directory →

Practice location Address checks out

931 Buena Vista St Ste 103
Duarte, CA 91010-1712
Phone: (626) 531-6891
Fax: (626) 531-6890
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Sleep Disorder Diagnostic Clinic/Center (primary) Taxonomy 261QS1200X

Record details

NPI number1144665100
Entity typeOrganization (Type 2)
Organization subpartNo
Authorized official Juan Gonzalez — General Manager · (818) 415-7254
Other names Restful Sleep Disorder Center; Restful Sleep Disorder Center
NPI enumeratedMay 5, 2013
Last updated in NPPESApril 13, 2021
Certification dateApril 6, 2021
Mailing address931 Buena Vista St, Suite 103, Duarte, CA 91010-1712