DR. CHETACHI A OKEREKE M.D, M.B.B.S
NPI 1083842199
Internal Medicine - Rheumatology in Walnut Creek, CA
About Dr. Chetachi A Okereke M.d, M.b.b.s NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. CHETACHI A OKEREKE M.D, M.B.B.S (NPI 1083842199) is an individual rheumatology provider in Walnut Creek, California, licensed in California (A109220) and active in the NPI registry since June 2009. She is enrolled in Medicare PECOS and is a graduate of Other (2001).
NPPES Registry Identity
Specialties & Licenses 2
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. Chetachi A Okereke M.d, M.b.b.s 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 Chetachi Okereke reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Richmond, CA 94801
- Reassigned Medicare billing, California enrollment
- 20,078 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 94596 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 3
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Chetachi Okereke's NPI number?
The NPI number for Chetachi Okereke is 1083842199. It was assigned to this individual provider in the NPPES registry on June 26, 2009.
Where is Chetachi Okereke located?
Chetachi Okereke practices at 1840 San Miguel Dr Suite 203, Walnut Creek, CA 94596. The listed phone number is (510) 712-9968.
What is Chetachi Okereke's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Rheumatology, with taxonomy code 207RR0500X.
Is Chetachi Okereke enrolled in Medicare?
Yes. Chetachi Okereke 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 Chetachi Okereke's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Chetachi Okereke reassigns Medicare benefits to Permanente Medical Group Inc (Richmond, 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 Chetachi Okereke'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 Chetachi Okereke was last updated on February 11, 2022. 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. Chetachi A Okereke, M.D, M.B.B.S · NPI 1083842199
Rheumatology physician in Walnut Creek, California. Individual provider, active in the CMS NPPES registry since June 26, 2009.
## Identity
- **NPI:** 1083842199 (Entity type: Individual)
- **Enumerated:** June 26, 2009
- **Primary specialty:** Internal Medicine - Rheumatology · taxonomy 207RR0500X
- **State license:** A109220 (California)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 1840 SAN MIGUEL DR, SUITE 203, Walnut Creek, CA 94596-8602
- **Phone:** (510) 712-9968
## 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:** Permanente Medical Group Inc (NPI 1235226531, Richmond, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2001
## Record status
- **NPPES last updated:** February 11, 2022
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Source: [NPI Profile](https://npiprofile.com/npi/1083842199) · Data from the CMS NPPES public registry.