DR. ANNAPOORANI CHELLAPPAN M.D.
NPI 1023377330
Family Medicine in Thousand Oaks, CA
About Dr. Annapoorani Chellappan M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. ANNAPOORANI CHELLAPPAN M.D. (NPI 1023377330) is an individual family medicine provider in Thousand Oaks, California, licensed in California (A136580) and active in the NPI registry since May 2012. She is enrolled in Medicare PECOS and is a graduate of Other (2012).
NPPES Registry Identity
Specialties & Licenses
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Annapoorani Chellappan M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignment
Medicare enrollment records show Annapoorani Chellappan reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Woodland Hills, CA 91367
- Reassigned Medicare billing, California enrollment
- 13,921 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 91360 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 14
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
THOUSAND OAKS, CA 91360
THOUSAND OAKS, CA 91360
THOUSAND OAKS, CA 91360
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 Annapoorani Chellappan's NPI number?
The NPI number for Annapoorani Chellappan is 1023377330. It was assigned to this individual provider in the NPPES registry on May 7, 2012.
Where is Annapoorani Chellappan located?
Annapoorani Chellappan practices at 365 E Hillcrest Dr, Thousand Oaks, CA 91360. The listed phone number is (888) 515-3500.
What is Annapoorani Chellappan's specialty?
The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.
Is Annapoorani Chellappan enrolled in Medicare?
Yes. Annapoorani Chellappan is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organization bills Medicare for Annapoorani Chellappan's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Annapoorani Chellappan reassigns Medicare benefits to Southern California Permanente Medical Group (Woodland Hills, CA). The 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 Annapoorani Chellappan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Annapoorani Chellappan was last updated on November 29, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.
# Dr. Annapoorani Chellappan, M.D. · NPI 1023377330
Family Medicine physician in Thousand Oaks, California. Individual provider, active in the CMS NPPES registry since May 7, 2012.
## Identity
- **NPI:** 1023377330 (Entity type: Individual)
- **Enumerated:** May 7, 2012
- **Primary specialty:** Family Medicine · taxonomy 207Q00000X
- **State license:** A136580 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 365 E HILLCREST DR, Thousand Oaks, CA 91360-5820
- **Phone:** (888) 515-3500
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Southern California Permanente Medical Group (NPI 1952333478, Woodland Hills, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2012
## Record status
- **NPPES last updated:** November 29, 2021
---
Source: [NPI Profile](https://npiprofile.com/npi/1023377330) · Data from the CMS NPPES public registry.