Diana Marquardt, MD
NPI 1114909454 · Internal Medicine Physician · San Diego, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Diana Marquardt, MD is a Internal Medicine Physician provider in San Diego, CA (NPI 1114909454).
Provider details
- NPI number
- 1114909454
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- License
- MDG44220 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
20 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- 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 · 108 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 290 | 85 |
| Metformin Hcl | 248 | 66 |
| Amlodipine Besylate | 240 | 77 |
| Omeprazole | 182 | 41 |
| Lisinopril | 175 | 46 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 169 | 38 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$410 across 19 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
- 2005-11-14
- Last updated
- 2007-07-08
Frequently asked questions
- What is Diana Marquardt's NPI number?
- Diana Marquardt's National Provider Identifier (NPI) is 1114909454, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Diana Marquardt's specialty?
- Diana Marquardt is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Diana Marquardt located?
- Diana Marquardt's practice location on file with NPPES is 4290 Polk Ave, San Diego, CA 92105-1524.
- What is Diana Marquardt's phone number?
- The practice phone number listed in the NPPES registry for Diana Marquardt is (619) 563-0507.
- Does Diana Marquardt accept Medicare?
- Diana Marquardt is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Diana Marquardt's NPI active?
- Yes — Diana Marquardt's NPI (1114909454) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.