Ellen Haddock, MD
NPI 1851823454 · Dermatology Physician · Fremont, CA
Enrolled with Medicare as Practitioner - Dermatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ellen Haddock, MD is a Dermatology Physician provider in Fremont, CA (NPI 1851823454).
Provider details
- NPI number
- 1851823454
- Entity type
- Individual
- Primary specialty
- Dermatology 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 tenure25% of score
9 yrs in NPPES registry
- Profile completeness25% of score
83% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
1,223 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) |
|---|---|---|
| Destruction of Precancer Skin Growth, 2-14 Growths17003 | 344 | $9 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 295 | $110 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 112 | $134 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 109 | $154 |
| Destruction of Precancer Skin Growth, 1 Growth17000 | 107 | $68 |
| Biopsy of Related Skin Growth, First Growth |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 15 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Ketoconazole | 77 | 48 |
| Triamcinolone Acetonide | 75 | 48 |
| Clobetasol Propionate | 53 | 38 |
| Fluocinonide | 46 | 23 |
| Minoxidil | 41 | 18 |
| Mupirocin | 39 | 24 |
| Dutasteride | 22 | — |
| Hydrocortisone | 22 | 20 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$66 across 3 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)
- 5000 Civic Center DrSan Rafael, CA 94903-4184Phone: (415) 499-0100Fax: (415) 499-0290
Registry dates
- Enumerated
- 2017-04-01
- Last updated
- 2024-11-18
- Certified
- 2024-11-18
Frequently asked questions
- What is Ellen Haddock's NPI number?
- Ellen Haddock's National Provider Identifier (NPI) is 1851823454, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ellen Haddock's specialty?
- Ellen Haddock is listed in the NPPES registry with a primary specialty of Dermatology Physician (Allopathic & Osteopathic Physicians).
- Where is Ellen Haddock located?
- Ellen Haddock's practice location on file with NPPES is 3200 Kearney St, Fremont, CA 94538-2299.
- What is Ellen Haddock's phone number?
- The practice phone number listed in the NPPES registry for Ellen Haddock is (510) 498-2374.
- Does Ellen Haddock accept Medicare?
- Ellen Haddock is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ellen Haddock's NPI active?
- Yes — Ellen Haddock's NPI (1851823454) is active in the NPPES registry as of the last update on 2024-11-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.