Chris Tsimerekis, M.D.
NPI 1942311832 · Endocrinology, Diabetes & Metabolism Physician · Fountain Valley, CA
Enrolled with Medicare as Practitioner - Endocrinology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Chris Tsimerekis, M.D. is a Endocrinology, Diabetes & Metabolism Physician provider in Fountain Valley, CA (NPI 1942311832).
Provider details
- NPI number
- 1942311832
- Entity type
- Individual
- Primary specialty
- Endocrinology, Diabetes & Metabolism PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- G811410 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
1,285 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 465 | $138 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 436 | $98 |
| Continuous Monitoring of Blood Sugar Level in Tissue Fluid Using Sensor Under Skin With Interpretation and Report95251 | 145 | $36 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 135 | $81 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 55 | $179 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 37 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodiumbrand: Synthroid | 215 | 37 |
| Metformin Hcl | 150 | 38 |
| Levothyroxine Sodium | 141 | 33 |
| Semaglutidebrand: Ozempic | 119 | 23 |
| Dulaglutidebrand: Trulicity | 81 | 12 |
| Pen Needle, Diabeticbrand: Nano 2nd Gen Pen Needle | 81 | 25 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$886 across 26 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-08-31
- Last updated
- 2007-07-09
Frequently asked questions
- What is Chris Tsimerekis's NPI number?
- Chris Tsimerekis's National Provider Identifier (NPI) is 1942311832, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Chris Tsimerekis's specialty?
- Chris Tsimerekis is listed in the NPPES registry with a primary specialty of Endocrinology, Diabetes & Metabolism Physician (Allopathic & Osteopathic Physicians).
- Where is Chris Tsimerekis located?
- Chris Tsimerekis's practice location on file with NPPES is 11100 Warner Ave, Fountain Valley, CA 92708-7506.
- What is Chris Tsimerekis's phone number?
- The practice phone number listed in the NPPES registry for Chris Tsimerekis is (714) 549-9927.
- Does Chris Tsimerekis accept Medicare?
- Chris Tsimerekis is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Chris Tsimerekis's NPI active?
- Yes — Chris Tsimerekis's NPI (1942311832) is active in the NPPES registry as of the last update on 2007-07-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.