Vivien Bonert, M.D.
NPI 1235117128 · Endocrinology, Diabetes & Metabolism Physician · Los Angeles, CA
Enrolled with Medicare as Practitioner - Endocrinology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Vivien Bonert, M.D. is a Endocrinology, Diabetes & Metabolism Physician provider in Los Angeles, CA (NPI 1235117128).
Provider details
- NPI number
- 1235117128
- Entity type
- Individual
- Primary specialty
- Endocrinology, Diabetes & Metabolism PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- A50321 (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
170 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) |
|---|---|---|
| Subsequent Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 25 Minutes99231 | 89 | $53 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 41 | $104 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 15 | $70 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 13 | $154 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 12 | $139 |
Typical Medicare-allowed amounts for these services range $53–$154 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 12 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Hydrocortisone | 66 | 12 |
| Levothyroxine Sodium | 61 | 15 |
| Pegvisomantbrand: Somavert | 28 | — |
| Levothyroxine Sodiumbrand: Synthroid | 26 | — |
| Testosterone Cypionate | 26 | — |
| Cabergoline | 19 | — |
| Desmopressin Acetate | 19 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$3,877 across 7 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
- 2006-01-03
- Last updated
- 2014-05-02
Frequently asked questions
- What is Vivien Bonert's NPI number?
- Vivien Bonert's National Provider Identifier (NPI) is 1235117128, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Vivien Bonert's specialty?
- Vivien Bonert is listed in the NPPES registry with a primary specialty of Endocrinology, Diabetes & Metabolism Physician (Allopathic & Osteopathic Physicians).
- Where is Vivien Bonert located?
- Vivien Bonert's practice location on file with NPPES is 8700 Beverly Blvd., Los Angeles, CA 90048-1865.
- What is Vivien Bonert's phone number?
- The practice phone number listed in the NPPES registry for Vivien Bonert is (310) 423-5000.
- Does Vivien Bonert accept Medicare?
- Vivien Bonert is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Vivien Bonert's NPI active?
- Yes — Vivien Bonert's NPI (1235117128) is active in the NPPES registry as of the last update on 2014-05-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.