Joseph E. Barrera, M.D.
Endocrinology, Diabetes & Metabolism Physician · Mission Viejo, CA
Joseph E. Barrera, M.D. is an endocrinology, diabetes & metabolism physician with a practice address in Mission Viejo, California, and NPI 1629054630, issued on Dec 21, 2005. Check the license (California G64643, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Joseph E. Barrera
- Credential
- M.D.
- Primary taxonomy
- Endocrinology, Diabetes & Metabolism Physician 207RE0101X
- License number
- G64643 CA
Self-reported in NPPES; status is on the state search - Practice location
- 26800 Crown Valley Pkwy, Mission Viejo, CA 92691
- Phone
- (949) 542-8004
- Enumerated
- Dec 21, 2005
- Record last updated
- Oct 15, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (949) 364-3682
- Medicaid ID
- 00G646430 CA
- Medicare enrollment
- Enrolled (PECOS I20100224000773); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest endocrinology, diabetes & metabolism physician records → All 1,131 in California → Look up another NPI →
Also registered at 26800 Crown Valley Pkwy
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Joseph E. Barrera in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G64643Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
71% more Medicare Part D claims than the average endocrinology, diabetes & metabolism physician in 2024
4,495 Medicare Part D claims for 479 beneficiaries, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D. Brand-name drugs were 34% of claims. 18 claims were for opioids.
Most prescribed
- Levothyroxine Sodium395 claims
- Synthroid352 claims
- Metformin Hcl204 claims
- Rosuvastatin Calcium197 claims
- Jardiance168 claims
- Ozempic168 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.
Industry payments in 2024: $673.64
37 payments; by number, the most common kind was food and beverage; the largest payer was Abbott Laboratories. The 5,661 providers of this specialty with any payment received $5,742.15 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Providence Medical FoundationFullerton, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Joseph E. Barrera among 1,131 endocrinology, diabetes & metabolism physician records in California
Joseph E. Barrera, M.D. is one of 1,131 endocrinology, diabetes & metabolism physician records with a practice address in California. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 95% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated1987 · median 2003 among the 779 with a school on file
- Record last updated2021 · 57% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RE0101X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Endocrinology, Diabetes & Metabolism Physician providers in California
There are 1,131 endocrinology, diabetes & metabolism physician records in California.
All 1,131 in California → Every provider in Mission Viejo → Endocrinology, Diabetes & Metabolism Physician nationwide →
The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes
- Jessica Chan, MDMission Viejo, CA 926911275927485
- Lisa Dao, MDMission Viejo, CA 926911114422730
- Karen Frankwich, MDMission Viejo, CA 926911316100415
- Alireza Hosseini, MDMission Viejo, CA 926911629324140
- Mim Mulford, M.D.Mission Viejo, CA 926911235116542
- Erene Sami, M.D.Mission Viejo, CA 926911023335817
- Helen Stosel, M.D.Mission Viejo, CA 926911952337362
- Neil Tran, MDMission Viejo, CA 926911316096688
Common questions
What is Joseph E. Barrera, M.D.'s NPI number?
Joseph E. Barrera, M.D.'s National Provider Identifier (NPI) is 1629054630, issued on Dec 21, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Joseph E. Barrera, M.D. located?
The NPPES record lists a practice address at 26800 Crown Valley Pkwy, Mission Viejo, CA, 92691. Phone: (949) 542-8004. Providers update this record themselves, so call before visiting.
How can I verify Joseph E. Barrera, M.D.'s license?
NPPES lists California license number G64643, 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 Joseph E. Barrera, M.D. prescribe under Medicare Part D?
In 2024, Joseph E. Barrera, M.D. had 4,495 Medicare Part D claims for 479 beneficiaries; the average among endocrinology, diabetes & metabolism physician prescribers was 2,630. 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.