SOUTH ORANGE COUNTY GASTROENTEROLOGY INC
NPI 1861612293
Internal Medicine - Gastroenterology in Mission Viejo, CA
About South Orange County Gastroenterology Inc NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
SOUTH ORANGE COUNTY GASTROENTEROLOGY INC (NPI 1861612293) is a healthcare organization registered as a gastroenterology in Mission Viejo, California and active in the NPI registry since April 2007. The organization maintains a secondary practice location in Mission Viejo and lists Nader Mirhoseni, President, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Group Practice 1
Medicare Participation & PECOS CMS
Medicare enrollment, revalidation and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
South Orange County Gastroenterology Inc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Revalidation Due Date
Revalidation due by February 28, 2027
Medicare-enrolled providers and suppliers confirm their enrollment information with CMS on a set cycle, every 5 years for most and every 3 years for medical equipment suppliers. CMS sets the due date for each enrollment.
Clinicians Billing Medicare Through This Organization
3Medicare enrollment records show 3 clinicians reassign Medicare billing to South Orange County Gastroenterology Inc, which bills Medicare for the services they deliver. Of these, 2 practice at this address. They are listed nearest first.
Clinicians, nearest first (3)
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 South Orange County Gastroenterology Inc's NPI number?
The NPI number for South Orange County Gastroenterology Inc is 1861612293. It was assigned to this organization in the NPPES registry on April 26, 2007.
Where is South Orange County Gastroenterology Inc located?
South Orange County Gastroenterology Inc is located at 26691 Plaza Ste 150, Mission Viejo, CA 92691. The listed phone number is (949) 348-2900.
What is South Orange County Gastroenterology Inc's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.
Is South Orange County Gastroenterology Inc enrolled in Medicare?
Yes. South Orange County Gastroenterology Inc is registered in the Medicare PECOS enrollment system.
When is South Orange County Gastroenterology Inc's Medicare revalidation due?
According to the CMS Revalidation Due Date List (October 2026 release), the Medicare Non-DME Part B enrollment for this organization (California, Clinic/Group Practice) is due for revalidation by February 28, 2027. Medicare providers and suppliers revalidate their enrollment every 5 years, and medical equipment suppliers every 3 years. Confirm current requirements with your Medicare Administrative Contractor.
How many clinicians bill Medicare through South Orange County Gastroenterology Inc?
According to the CMS Revalidation Reassignment List (October 2026 release), 3 clinicians reassign their Medicare billing to South Orange County Gastroenterology Inc, in Colorectal Surgery (Proctology), Gastroenterology and Nurse Practitioner. 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. Of these, 2 practice at this address. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
When was this NPI record last updated?
The NPPES record for South Orange County Gastroenterology Inc was last updated on October 21, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.
# South Orange County Gastroenterology Inc · NPI 1861612293
Gastroenterology organization in Mission Viejo, California. Organization record, active in the CMS NPPES registry since April 26, 2007.
## Identity
- **NPI:** 1861612293 (Entity type: Organization)
- **Enumerated:** April 26, 2007
- **Primary specialty:** Internal Medicine - Gastroenterology · taxonomy 207RG0100X
- **Organization subpart:** No
- **Authorized official:** Nader Mirhoseni, PRESIDENT
## Practice location
- **Address:** 26691 PLAZA STE 150, Mission Viejo, CA 92691-6329
- **Phone:** (949) 348-2900 · **Fax:** (949) 348-0960
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Medicare revalidation due:** February 28, 2027 (Non-DME Part B, California, Clinic/Group Practice) · CMS Revalidation Due Date List, October 2026 release
- **Clinicians billing through this organization:** 3 clinicians in 3 Medicare specialties reassign Medicare billing to this organization (form CMS-855R); largest: Colorectal Surgery (Proctology) (1), Gastroenterology (1), Nurse Practitioner (1); 2 practice at this address · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** October 21, 2020
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Source: [NPI Profile](https://npiprofile.com/npi/1861612293) · Data from the CMS NPPES public registry.