Margaret Johnston
NPI 1669932406 · Dermatology Physician · Colchester, VT
Enrolled with Medicare as Practitioner - Dermatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Margaret Johnston is a Dermatology Physician provider in Colchester, VT (NPI 1669932406).
Provider details
- NPI number
- 1669932406
- Entity type
- Individual
- Primary specialty
- Dermatology PhysicianAllopathic & Osteopathic Physicians
- Sex
- Female
- Sole proprietor
- No
- License
- 332091 (NY)
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 tenure28% of score
7 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
2,185 Medicare services, 2024 (ranked within specialty)
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 methodology.
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 | 727 | $7 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 344 | $89 |
| Destruction of Precancer Skin Growth, 1 Growth17000 | 247 | $51 |
| Biopsy of Related Skin Growth, First Growth11102 | 240 | $96 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 172 | $127 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 20 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Ketoconazole | 388 | 188 |
| Clobetasol Propionate | 182 | 111 |
| Triamcinolone Acetonide | 139 | 99 |
| Fluorouracil | 87 | 79 |
| Hydrocortisone | 86 | 71 |
| Minoxidil | 47 | 16 |
| Dupilumabbrand: Dupixent Pen | 37 | — |
| Mupirocin | 34 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2019-03-20
- Last updated
- 2025-08-18
- Certified
- 2025-08-18
Frequently asked questions
- What is Margaret Johnston's NPI number?
- Margaret Johnston's National Provider Identifier (NPI) is 1669932406, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Margaret Johnston's specialty?
- Margaret Johnston is listed in the NPPES registry with a primary specialty of Dermatology Physician (Allopathic & Osteopathic Physicians).
- Where is Margaret Johnston located?
- Margaret Johnston's practice location on file with NPPES is 354 Mountain View Dr Ste 300, Colchester, VT 05446-5988.
- What is Margaret Johnston's phone number?
- The practice phone number listed in the NPPES registry for Margaret Johnston is (802) 864-0192.
- Does Margaret Johnston accept Medicare?
- Margaret Johnston is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Margaret Johnston's NPI active?
- Yes — Margaret Johnston's NPI (1669932406) is active in the NPPES registry as of the last update on 2025-08-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.