Margaret Fonder, MD
NPI 1962689133 · Dermatology Physician · Ridgewood, NJ
Enrolled with Medicare as Practitioner - Dermatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Margaret Fonder, MD is a Dermatology Physician provider in Ridgewood, NJ (NPI 1962689133).
Provider details
- NPI number
- 1962689133
- Entity type
- Individual
- Primary specialty
- Dermatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- MD13546 (RI)
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
18 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
2,424 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 | 889 | $8 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 499 | $100 |
| Destruction of Precancer Skin Growth, 1 Growth17000 | 287 | $60 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 216 | $141 |
| Biopsy of Related Skin Growth, First Growth11102 | 181 | $103 |
| Destruction of Skin Growth, 1-14 Growths |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 11 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Triamcinolone Acetonide | 110 | 70 |
| Ketoconazole | 74 | 44 |
| Clobetasol Propionate | 50 | 27 |
| Betamethasone/Propylene Glycbrand: Betamethasone Diprop Augmented | 46 | 31 |
| Hydrocortisone | 26 | 14 |
| Metronidazole | 26 | 16 |
| Minoxidil | 22 | — |
| Valacyclovir Hclbrand: Valacyclovir |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$301 across 17 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)
- 180 Ramapo Valley RdOakland, NJ 07436-2500Phone: (201) 337-5100Fax: (201) 337-7710
Registry dates
- Enumerated
- 2008-01-30
- Last updated
- 2022-02-16
- Certified
- 2022-02-16
Frequently asked questions
- What is Margaret Fonder's NPI number?
- Margaret Fonder's National Provider Identifier (NPI) is 1962689133, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Margaret Fonder's specialty?
- Margaret Fonder is listed in the NPPES registry with a primary specialty of Dermatology Physician (Allopathic & Osteopathic Physicians).
- Where is Margaret Fonder located?
- Margaret Fonder's practice location on file with NPPES is 400 Route 17 Ste 2, Ridgewood, NJ 07450-2013.
- What is Margaret Fonder's phone number?
- The practice phone number listed in the NPPES registry for Margaret Fonder is (201) 652-4536.
- Does Margaret Fonder accept Medicare?
- Margaret Fonder is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Margaret Fonder's NPI active?
- Yes — Margaret Fonder's NPI (1962689133) is active in the NPPES registry as of the last update on 2022-02-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.