Mountain Group LLC
Mountain Group LLC is a healthcare organization registered as Sleep Disorder Diagnostic Clinic/Center in Duarte, CA, holding Type 2 (organization) NPI 1144665100 since 2013. The authorized official on file is Juan Gonzalez, General Manager.
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1144665100 |
|---|---|
| Entity type | Organization (Type 2) |
| Legal business name | Mountain Group LLC |
| Other name | <Unavail> |
| Practice address | 931 BUENA VISTA ST, SUITE 103, Duarte, CA, 91010 |
| Phone | 6265316891 |
| Fax | 6265316890 |
| Enumeration date | 2013-05-05 |
| Last updated in NPPES | 2021-04-13 |
Authorized official
| Name | Juan Gonzalez |
|---|---|
| Title | General Manager |
| Phone | 8184157254 |
Taxonomy & classification
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 261QS1200X | Sleep Disorder Diagnostic Clinic/Center | Primary | — | — |
Copy-ready billing details
Provider: Mountain Group LLC NPI: 1144665100 Taxonomy: 261QS1200X (Sleep Disorder Diagnostic Clinic/Center) Address: 931 BUENA VISTA ST, SUITE 103, Duarte, CA, 91010
Providers at this address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1831195221 | Roy Saenz | Individual | Family Medicine Physician | Duarte, CA |
| 1356339733 | Ferdinand Alfonso | Individual | Neurology Physician | Duarte, CA |
| 1235113457 | Irene Lao | Individual | Dermatology Physician | Duarte, CA |
| 1174596233 | Elizabeth Smalley | Individual | Internal Medicine Physician | Duarte, CA |
| 1699720664 | Sundance Rehabilitation Agency Inc | Organization | Rehabilitation Clinic/Center | Duarte, CA |
| 1053351288 | Thomas Deguzman | Individual | Physical Therapist | Duarte, CA |
| 1891738209 | Gilbert Walton | Individual | Internal Medicine Physician | Duarte, CA |
| 1477589133 | Alicia Cuento | Individual | Pediatrics Physician | Duarte, CA |
Verify this record
Cross-check NPI 1144665100 against the authoritative CMS record: view Mountain Group LLC on the official NPPES registry .
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes — even if the provider moves or changes specialty. Read the full guide or validate an NPI number.
Frequently asked questions
What is a Type 2 NPI?
What type of organization is Mountain Group LLC?
Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2021-04-13.