SIERRA GASTROENTEROLOGY
NPI 1083830962
Internal Medicine - Gastroenterology in Lancaster, CA
About Sierra Gastroenterology NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
SIERRA GASTROENTEROLOGY (NPI 1083830962) is a healthcare organization registered as a gastroenterology in Lancaster, California and active in the NPI registry since April 2007. The organization lists Steven Garrett, Billing Manager, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 2
Group Practice 1
Medicare Participation & PECOS CMS
Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Sierra Gastroenterology is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
Medicare enrollment records show 1 clinician reassigns Medicare billing to Sierra Gastroenterology, which bills Medicare for the services this clinician delivers.
Clinician (1)
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Sierra Gastroenterology's NPI number?
The NPI number for Sierra Gastroenterology is 1083830962. It was assigned to this organization in the NPPES registry on April 18, 2007.
Where is Sierra Gastroenterology located?
Sierra Gastroenterology is located at 44725 10th St W Ste 250, Lancaster, CA 93534. The listed phone number is (310) 348-0500.
What is Sierra Gastroenterology's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.
Is Sierra Gastroenterology enrolled in Medicare?
Yes. Sierra Gastroenterology is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Sierra Gastroenterology?
According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Internal Medicine) reassigns their Medicare billing to Sierra Gastroenterology. A reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for the clinician's services. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
When was this NPI record last updated?
The NPPES record for Sierra Gastroenterology was last updated on February 13, 2008. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Sierra Gastroenterology · NPI 1083830962
Gastroenterology organization in Lancaster, California. Organization record, active in the CMS NPPES registry since April 18, 2007.
## Identity
- **NPI:** 1083830962 (Entity type: Organization)
- **Enumerated:** April 18, 2007
- **Primary specialty:** Internal Medicine - Gastroenterology · taxonomy 207RG0100X
- **Organization subpart:** No
- **Authorized official:** Steven Garrett, BILLING MANAGER
## Practice location
- **Address:** 44725 10TH ST W, STE 250, Lancaster, CA 93534-3033
- **Phone:** (310) 348-0500
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 1 clinician (Internal Medicine) reassigns Medicare billing to this organization (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** February 13, 2008
- **Other identifiers:** Medicare PIN W18464 (CA); Medicaid GR0024400 (CA)
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Source: [NPI Profile](https://npiprofile.com/npi/1083830962) · Data from the CMS NPPES public registry.