Jennifer Siani, M.D.
NPI 1649613761 · Endocrinology, Diabetes & Metabolism Physician · Westlake Village, CA
Enrolled with Medicare as Practitioner - Endocrinology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jennifer Siani, M.D. is a Endocrinology, Diabetes & Metabolism Physician provider in Westlake Village, CA (NPI 1649613761).
Provider details
- NPI number
- 1649613761
- Entity type
- Individual
- Primary specialty
- Endocrinology, Diabetes & Metabolism PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- A133595 (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
13 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
1,252 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 | 518 | $137 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 174 | $177 |
| Hemoglobin A1c Level83036 | 143 | $10 |
| Injection of Drug Or Substance Under Skin Or Into Muscle96372 | 113 | $16 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 97 | $17 |
| Continuous Monitoring of Blood Sugar Level in Tissue Fluid Using Sensor Under Skin With Interpretation and Report |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 46 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Semaglutidebrand: Ozempic | 219 | 47 |
| Levothyroxine Sodium | 215 | 81 |
| Tirzepatidebrand: Mounjaro | 178 | 23 |
| Metformin Hclbrand: Metformin Hcl Er | 145 | 60 |
| Metformin Hcl | 128 | 52 |
| Atorvastatin Calcium | 119 | 50 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$15 across 1 record (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
Additional practice locations (1)
- 757 Westwood PlzSuite 7501Los Angeles, CA 90095-7417Phone: (310) 825-7375
Registry dates
- Enumerated
- 2013-04-08
- Last updated
- 2026-03-20
- Certified
- 2026-03-20
Frequently asked questions
- What is Jennifer Siani's NPI number?
- Jennifer Siani's National Provider Identifier (NPI) is 1649613761, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jennifer Siani's specialty?
- Jennifer Siani is listed in the NPPES registry with a primary specialty of Endocrinology, Diabetes & Metabolism Physician (Allopathic & Osteopathic Physicians).
- Where is Jennifer Siani located?
- Jennifer Siani's practice location on file with NPPES is 1250 La Venta Dr, Westlake Village, CA 91361-3702.
- What is Jennifer Siani's phone number?
- The practice phone number listed in the NPPES registry for Jennifer Siani is (805) 494-6920.
- Does Jennifer Siani accept Medicare?
- Jennifer Siani is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jennifer Siani's NPI active?
- Yes — Jennifer Siani's NPI (1649613761) is active in the NPPES registry as of the last update on 2026-03-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.