Chris Tsimerekis, M.D.
Endocrinology, Diabetes & Metabolism Physician · Fountain Valley, CA
Chris Tsimerekis, M.D. is an endocrinology, diabetes & metabolism physician with a practice address in Fountain Valley, California, and NPI 1942311832, issued on Aug 31, 2006. Check the license (California G811410, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Chris Tsimerekis
- Credential
- M.D.
- Primary taxonomy
- Endocrinology, Diabetes & Metabolism Physician 207RE0101X
- License number
- G811410 CA
Self-reported in NPPES; status is on the state search - Practice location
- 11100 Warner Ave, Fountain Valley, CA 92708
- Phone
- (714) 549-9927
- Enumerated
- Aug 31, 2006
- Record last updated
- Jul 9, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (714) 556-9075
- Medicare enrollment
- Enrolled (PECOS I20040128000559); accepts Medicare assignment
- Medical or professional school
- University Of California, Geffen School Of Medicine, 1993
- 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 11100 Warner Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Chris Tsimerekis in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G811410Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
28% fewer Medicare Part D claims than the average endocrinology, diabetes & metabolism physician in 2024
1,897 Medicare Part D claims for 168 beneficiaries, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D. Brand-name drugs were 53% of claims.
Most prescribed
- Synthroid215 claims
- Metformin Hcl150 claims
- Levothyroxine Sodium141 claims
- Ozempic119 claims
- Nano 2nd Gen Pen Needle81 claims
- Trulicity81 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.
No measured MIPS final score for 2023
CMS assigned the neutral MIPS final score of 75 without scoring Quality, Cost, Promoting Interoperability or Improvement Activities. It is an administrative threshold, so PlainDoctor does not compare it with measured clinicians.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $885.91
26 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. 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.
Chris Tsimerekis among 1,131 endocrinology, diabetes & metabolism physician records in California
Chris Tsimerekis, 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 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 54% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated1993 · median 2003 among the 779 with a school on file
- Record last updated2007 · 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 Fountain Valley → Endocrinology, Diabetes & Metabolism Physician nationwide →
The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes
- Phong Bui, MDFountain Valley, CA 927081316177462
- Bachar Kurdi, M.D.Fountain Valley, CA 927081750483327
- Jinsun Choi, M.D.North Tustin, CA 927051538310131
- Maruja Diaz Arjonilla, MDSanta Ana, CA 927051841481074
- Yana Stolyarov, M.DSanta Ana, CA 927041982996799
- Anna Betlachin, MDIrvine, CA 926971396190567
- Neal Maler, MDIrvine, CA 926971497276547
- Qin YangIrvine, CA 926971649408444
Common questions
What is Chris Tsimerekis, M.D.'s NPI number?
Chris Tsimerekis, M.D.'s National Provider Identifier (NPI) is 1942311832, issued on Aug 31, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Chris Tsimerekis, M.D. located?
The NPPES record lists a practice address at 11100 Warner Ave, Fountain Valley, CA, 92708. Phone: (714) 549-9927. Providers update this record themselves, so call before visiting.
How can I verify Chris Tsimerekis, M.D.'s license?
NPPES lists California license number G811410, 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 Chris Tsimerekis, M.D. prescribe under Medicare Part D?
In 2024, Chris Tsimerekis, M.D. had 1,897 Medicare Part D claims for 168 beneficiaries; the average among endocrinology, diabetes & metabolism physician prescribers was 2,630. Part D covers Medicare prescriptions only.
What is Chris Tsimerekis, M.D.'s MIPS final score?
CMS assigned the neutral MIPS final score of 75 for 2023 without scoring any category, so it is not a measured result.
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.