Margaret Clark, MD
NPI 1093374639 · Family Medicine Physician · Ventura, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Margaret Clark, MD is a Family Medicine Physician provider in Ventura, CA (NPI 1093374639).
Provider details
- NPI number
- 1093374639
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
7 yrs in NPPES registry
- Profile completeness33% of score
83% of core fields populated
- Practice footprint20% of score
2 documented practice locations
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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 methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 40 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 227 | 68 |
| Metformin Hcl | 153 | 41 |
| Amlodipine Besylate | 103 | 28 |
| Lisinopril | 93 | 26 |
| Levothyroxine Sodium | 72 | 14 |
| Gabapentin | 68 | 17 |
| Omeprazole |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$78 across 4 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
Additional practice locations (1)
- 325 W Channel Islands BlvdOxnard, CA 93033-4501Phone: (805) 204-9500
Registry dates
- Enumerated
- 2019-06-07
- Last updated
- 2023-01-16
- Certified
- 2023-01-16
Frequently asked questions
- What is Margaret Clark's NPI number?
- Margaret Clark's National Provider Identifier (NPI) is 1093374639, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Margaret Clark's specialty?
- Margaret Clark is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Margaret Clark located?
- Margaret Clark's practice location on file with NPPES is 300 Hillmont Ave, Ventura, CA 93003-1651.
- What is Margaret Clark's phone number?
- The practice phone number listed in the NPPES registry for Margaret Clark is (805) 652-6100.
- Does Margaret Clark accept Medicare?
- Margaret Clark is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Margaret Clark's NPI active?
- Yes — Margaret Clark's NPI (1093374639) is active in the NPPES registry as of the last update on 2023-01-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.