OAKS INTERNAL MEDICINE, A PROFESSIONAL MEDICAL CORPORATION
NPI 1306149562
Internal Medicine in Newbury Park, CA
About Oaks Internal Medicine, A Professional Medical Corporation NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
OAKS INTERNAL MEDICINE, A PROFESSIONAL MEDICAL CORPORATION (NPI 1306149562) is a healthcare organization registered as an internal medicine in Newbury Park, California and active in the NPI registry since December 2010. The organization holds a CLIA Waiver certificate valid through January 18, 2027 and lists Asra S. I. Siddiqui, President, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
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)
Oaks Internal Medicine, A Professional Medical Corporation is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
2Medicare enrollment records show 2 clinicians reassign Medicare billing to Oaks Internal Medicine, A Professional Medical Corporation, which bills Medicare for the services they deliver. Of these, 1 practice at this address and 2 within 10 miles. They are listed nearest first.
Clinicians, nearest first (2)
Thousand Oaks, CA 91360
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
CLIA Laboratory Certificates CMS CLIA
Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.
Certificate of Waiver 05D2018945
Oaks Internal Medicine, A Professional Medical Corporation · Thousand Oaks, CAFrequently 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 Oaks Internal Medicine, A Professional Medical Corporation's NPI number?
The NPI number for Oaks Internal Medicine, A Professional Medical Corporation is 1306149562. It was assigned to this organization in the NPPES registry on December 9, 2010.
Where is Oaks Internal Medicine, A Professional Medical Corporation located?
Oaks Internal Medicine, A Professional Medical Corporation is located at 3295 Old Conejo Road Suite 201, Newbury Park, CA 91320. The listed phone number is (805) 375-6000.
What is Oaks Internal Medicine, A Professional Medical Corporation's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Oaks Internal Medicine, A Professional Medical Corporation enrolled in Medicare?
Yes. Oaks Internal Medicine, A Professional Medical Corporation is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Oaks Internal Medicine, A Professional Medical Corporation?
According to the CMS Revalidation Reassignment List (October 2026 release), 2 clinicians reassign their Medicare billing to Oaks Internal Medicine, A Professional Medical Corporation, in Family Practice and Internal Medicine. 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, 1 practice at this address and 2 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Does Oaks Internal Medicine, A Professional Medical Corporation hold a CLIA laboratory certificate?
Yes. A Certificate of Waiver (number 05D2018945) is associated with this NPI, valid through January 18, 2027. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.
When was this NPI record last updated?
The NPPES record for Oaks Internal Medicine, A Professional Medical Corporation was last updated on November 2, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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.
# Oaks Internal Medicine, A Professional Medical Corporation · NPI 1306149562
Internal Medicine organization in Newbury Park, California. Organization record, active in the CMS NPPES registry since December 9, 2010.
## Identity
- **NPI:** 1306149562 (Entity type: Organization)
- **Enumerated:** December 9, 2010
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **Organization subpart:** No
- **Authorized official:** Asra Siddiqui, PRESIDENT
## Practice location
- **Address:** 3295 OLD CONEJO ROAD, SUITE 201, Newbury Park, CA 91320-2152
- **Phone:** (805) 375-6000 · **Fax:** (805) 375-0011
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 2 clinicians in 2 Medicare specialties reassign Medicare billing to this organization (form CMS-855R); largest: Family Practice (1), Internal Medicine (1); 1 practice at this address and 2 within 10 miles · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** November 2, 2011
- **CLIA laboratory certificates:** 1 on file
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Source: [NPI Profile](https://npiprofile.com/npi/1306149562) · Data from the CMS NPPES public registry.