Chetachi A. Okereke, M.D, M.B.B.S
Rheumatology Physician · Walnut Creek, CA
Chetachi A. Okereke, M.D, M.B.B.S is a rheumatology physician with a practice address in Walnut Creek, California, and NPI 1083842199, issued on Jun 26, 2009. Check the license (California A109220, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Chetachi A. Okereke
- Credential
- M.D, M.B.B.S
- Primary taxonomy
- Rheumatology Physician 207RR0500X
- License number
- A109220 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1840 San Miguel Dr, Walnut Creek, CA 94596
- Phone
- (510) 712-9968
- Enumerated
- Jun 26, 2009
- Record last updated
- Feb 11, 2022
- Medicare enrollment
- Enrolled (PECOS I20131206000186); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest rheumatology physician records → All 926 in California → Look up another NPI →
Also registered at 1840 San Miguel Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Tanya Budiarto, DPTPhysical Therapist1124582333
- Kelly Kerr, DPTPhysical Therapist1356645493
- Shu-Ling Lin, L.ACAcupuncturist1255251245
- Rehana Raheem, PSY. D.Clinical Psychologist1285141960
Verify Chetachi A. Okereke in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A109220Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
11% fewer Medicare Part D claims than the average rheumatology physician in 2024
1,765 Medicare Part D claims for 479 beneficiaries, against an average of 1,978 among the 6,301 providers of this specialty who prescribed in Part D. Brand-name drugs were 23% of claims.
Most prescribed
- Prednisone443 claims
- Methotrexate318 claims
- Hydroxychloroquine Sulfate208 claims
- Colchicine83 claims
- Leflunomide68 claims
- Xeljanz56 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Permanente Medical Group IncWalnut Creek, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Chetachi A. Okereke among 926 rheumatology physician records in California
Chetachi A. Okereke, M.D, M.B.B.S is one of 926 rheumatology physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2009, is newer than 63% of them.
- NPI issued2009 · 63% of these records are older, 34% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated2001 · median 2003 among the 641 with a school on file
- Record last updated2022 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RR0500X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Rheumatology Physician providers in California
There are 926 rheumatology physician records in California.
All 926 in California → Every provider in Walnut Creek → Rheumatology Physician nationwide →
The 8 rheumatology physician records with the nearest ZIP codes
- Midori Nishio, M.D.Walnut Creek, CA 945971316010366
- Raul Romea, MDWalnut Creek, CA 945971962408112
- Vandana Sharma, M.D.Walnut Creek, CA 945971528131588
- Pedram Taher, M.DWalnut Creek, CA 945951669625125
- Monica WeiWalnut Creek, CA 945971417450214
- Rashmi Dixit, M.D.Walnut Creek, CA 945981811990666
- Zuzana Foster, M.D.Walnut Creek, CA 945981184621542
- John Loeb, M.D.Walnut Creek, CA 945981932106390
Common questions
What is Chetachi A. Okereke, M.D, M.B.B.S's NPI number?
Chetachi A. Okereke, M.D, M.B.B.S's National Provider Identifier (NPI) is 1083842199, issued on Jun 26, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Chetachi A. Okereke, M.D, M.B.B.S located?
The NPPES record lists a practice address at 1840 San Miguel Dr, Walnut Creek, CA, 94596. Phone: (510) 712-9968. Providers update this record themselves, so call before visiting.
How can I verify Chetachi A. Okereke, M.D, M.B.B.S's license?
NPPES lists California license number A109220, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Chetachi A. Okereke, M.D, M.B.B.S prescribe under Medicare Part D?
In 2024, Chetachi A. Okereke, M.D, M.B.B.S had 1,765 Medicare Part D claims for 479 beneficiaries; the average among rheumatology physician prescribers was 1,978. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.