Rowena Guevarra Javier, MD
Internal Medicine Physician · Bellflower, CA
Rowena Guevarra Javier, MD is an internal medicine physician with a practice address in Bellflower, California, and NPI 1366513285, issued on Nov 13, 2006. Check the license (California A88423, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Rowena Guevarra Javier
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A88423 CA
Self-reported in NPPES; status is on the state search - Practice location
- 9400 Rosecrans Ave, Bellflower, CA 90706
- Phone
- (562) 461-3000
- Enumerated
- Nov 13, 2006
- Record last updated
- Dec 8, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20051222000694); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 9400 Rosecrans Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Michele Afshar, PAPhysician Assistant1013065952
- Maria Agbing-Mamangun, MDPsychiatry Physician1063589984
Verify Rowena Guevarra Javier in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A88423Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
62% more Medicare Part D claims than the average internal medicine physician in 2024
5,140 Medicare Part D claims for 348 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 76 claims were for opioids.
Most prescribed
- Amlodipine Besylate438 claims
- Atorvastatin Calcium387 claims
- Losartan Potassium372 claims
- Rosuvastatin Calcium281 claims
- Simvastatin197 claims
- Levothyroxine Sodium166 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
- Southern California Permanente Medical GroupBellflower, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Rowena Guevarra Javier among 17,696 internal medicine physician records in California
Rowena Guevarra Javier, MD is one of 17,696 internal medicine physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 56% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1989 · median 2004 among the 11,065 with a school on file
- Record last updated2021 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
72 internal medicine physician records list a practice address in Bellflower
They are 72 of the 1,468 NPPES records with a practice address in Bellflower, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Bellflower → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Alem Asrat, MDBellflower, CA 907061801967724
- Asha Bisht, MDBellflower, CA 907061568533487
- Jane Fealy, MDBellflower, CA 907061700957743
- Ghassan Gholmieh, MDBellflower, CA 907061164599064
- Calvin Hong, MDBellflower, CA 907061497822316
- Chandrabhan Kewalramani, MDBellflower, CA 907061629149521
- Charles Kung, M.D.Bellflower, CA 907061922014174
- Philip Lim, MDBellflower, CA 907061235239302
Common questions
What is Rowena Guevarra Javier, MD's NPI number?
Rowena Guevarra Javier, MD's National Provider Identifier (NPI) is 1366513285, issued on Nov 13, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Rowena Guevarra Javier, MD located?
The NPPES record lists a practice address at 9400 Rosecrans Ave, Bellflower, CA, 90706. Phone: (562) 461-3000. Providers update this record themselves, so call before visiting.
How can I verify Rowena Guevarra Javier, MD's license?
NPPES lists California license number A88423, 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 Rowena Guevarra Javier, MD prescribe under Medicare Part D?
In 2024, Rowena Guevarra Javier, MD had 5,140 Medicare Part D claims for 348 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.