Brian Chavez, M.D.
NPI 1215974969 · Endocrinology, Diabetes & Metabolism Physician · Lake Forest, CA
Enrolled with Medicare as Practitioner - Endocrinology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Brian Chavez, M.D. is a Endocrinology, Diabetes & Metabolism Physician provider in Lake Forest, CA (NPI 1215974969).
Provider details
- NPI number
- 1215974969
- Entity type
- Individual
- Primary specialty
- Endocrinology, Diabetes & Metabolism PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A76077 (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
20 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
21,552 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 | 1,055 | $137 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 890 | $9 |
| Blood Test, Basic Group of Blood Chemicals (calcium, Total)80048 | 889 | $8 |
| Liver Function Blood Test Panel80076 | 878 | $8 |
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count85025 | 876 | $8 |
| Blood Test, Thyroid Stimulating Hormone (tsh)84443 | 871 | $16 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 85 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 475 | 124 |
| Metformin Hclbrand: Metformin Hcl Er | 288 | 84 |
| Levothyroxine Sodiumbrand: Synthroid | 276 | 65 |
| Atorvastatin Calcium | 272 | 77 |
| Semaglutidebrand: Ozempic | 262 | 57 |
| Empagliflozinbrand: Jardiance | 214 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$2,367 across 104 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
- 2006-06-01
- Last updated
- 2007-07-09
Frequently asked questions
- What is Brian Chavez's NPI number?
- Brian Chavez's National Provider Identifier (NPI) is 1215974969, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Brian Chavez's specialty?
- Brian Chavez is listed in the NPPES registry with a primary specialty of Endocrinology, Diabetes & Metabolism Physician (Allopathic & Osteopathic Physicians).
- Where is Brian Chavez located?
- Brian Chavez's practice location on file with NPPES is 23331 El Toro Rd, Lake Forest, CA 92630-4891.
- What is Brian Chavez's phone number?
- The practice phone number listed in the NPPES registry for Brian Chavez is (949) 916-9100.
- Does Brian Chavez accept Medicare?
- Brian Chavez is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Brian Chavez's NPI active?
- Yes — Brian Chavez's NPI (1215974969) 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.