Margaret Schwarz, MD
NPI 1669822219 · Dermatology Physician · Boston, MA
Enrolled with Medicare as Practitioner - Dermatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Margaret Schwarz, MD is a Dermatology Physician provider in Boston, MA (NPI 1669822219).
Provider details
- NPI number
- 1669822219
- Entity type
- Individual
- Primary specialty
- Dermatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- Yes
- License
- MT210961 (PA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
10 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
1,773 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 | 692 | $8 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 335 | $99 |
| Destruction of Precancer Skin Growth, 1 Growth17000 | 216 | $64 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 147 | $139 |
| Destruction of Skin Growth, 1-14 Growths17110 | 139 | $129 |
| Biopsy of Related Skin Growth, First Growth |
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 | 89 | 67 |
| Clobetasol Propionate | 38 | 30 |
| Ketoconazole | 35 | 24 |
| Hydrocortisone | 29 | 24 |
| Fluocinonide | 28 | 19 |
| Nystatin | 23 | 13 |
| Ciclopirox Olaminebrand: Ciclopirox | 22 | 11 |
| Mupirocin | 21 | 19 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$26 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
Registry dates
- Enumerated
- 2016-06-14
- Last updated
- 2017-10-30
Frequently asked questions
- What is Margaret Schwarz's NPI number?
- Margaret Schwarz's National Provider Identifier (NPI) is 1669822219, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Margaret Schwarz's specialty?
- Margaret Schwarz is listed in the NPPES registry with a primary specialty of Dermatology Physician (Allopathic & Osteopathic Physicians).
- Where is Margaret Schwarz located?
- Margaret Schwarz's practice location on file with NPPES is 725 Albany St, Boston, MA 02118-2526.
- What is Margaret Schwarz's phone number?
- The practice phone number listed in the NPPES registry for Margaret Schwarz is (617) 638-8000.
- Does Margaret Schwarz accept Medicare?
- Margaret Schwarz is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Margaret Schwarz's NPI active?
- Yes — Margaret Schwarz's NPI (1669822219) is active in the NPPES registry as of the last update on 2017-10-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.