NPI registry status
Active
2026 NPPES data Dermatology Physician NPI 1669932406
Verify on CMS → Margaret Johnston
Dermatology Physician in Colchester, Vermont.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 14,610 in Dermatology Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
394
Medicare Part D claims · 171 beneficiaries · Dermatology Physician avg: 729
Generic prescribing
94%
generic claims · 6% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
73.6/100
▼ 10 pts below national avg 83.1 · Mid-tier
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Margaret Johnston reported a CMS MIPS final score of 73.6/100 - below the 83.1 national average - and filed 394 Medicare Part D claims in 2023.
- 73.6/100
- MIPS score · -10 vs avg
- 394
- Part D claims, 2023
- 94%
- generic prescribing
- Likely
- board-certified (heuristic)
Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.
Margaret Johnston's MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
74 11th percentile higher than 11% of 477,587 scored providers
Each bar is a band; taller bars hold more scored providers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source CMS Merit-based Incentive Payment System (MIPS) · 2023
Where Margaret Johnston sits
This provider among dermatology physician peers
Across the 6,594 dermatology physician providers who report both Medicare Part D prescribing and a MIPS quality score, Margaret Johnston writes more Part D claims than 26% of them and scores higher on MIPS quality than 14% - placing this provider in the lower-volume, lower-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Part D claim volume vs MIPS quality, by specialty percentile
Each dot is one dermatology physician peer from a representative sample of 60; the gold marker is Margaret Johnston. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Margaret Johnston practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 1 hospital affiliation - signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Margaret Johnston?
Below national averagePrimary specialty
Dermatology Physician
Medicare Part D claims
394 46% vs specialty avg
MIPS final score
73.6/100 9.5 pts vs avg
Specialty distribution in Vermont
How Dermatology Physician compares to other specialties among Vermont providers
Medicare quality performance, MIPS
Margaret Johnston's 2023 MIPS final score plotted against the Dermatology Physician national average
- MIPS Final Score
- 73.6/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Dermatology Physician) - 73.6/100 vs national avg 83.1
How MIPS and board certification work
The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.
Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).
Margaret Johnston appears in the CMS NPPES registry as a Dermatology Physician provider at 354 MOUNTAIN VIEW DR STE 300, Colchester, VT, 05446, with a listed phone of (802) 864-0192. NPI 1669932406 was issued on 03/20/2019.
Medicare Part D records for calendar year 2023 show 394 prescription claims written by this provider, covering 171 Medicare beneficiaries and totaling roughly $189K in drug spend, split 6% brand-name and 94% generic by claim count. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 73.6/100 for the 2023 performance year (Quality 75.8, Cost 51.4), compared with the national average of 83.1.
Dermatology Physician is a mid-sized specialty nationwide, with 14,610 enrolled providers across 53 states and an average of 729 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline.
Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist, always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.
Practice Address
Provider Details
| NPI | 1669932406 |
|---|---|
| Specialty | Dermatology Physician |
| Gender | Female |
| NPI Issued | 03/20/2019 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
73.5637
Final Score
Avg: 83.1
75.8435
Quality
51.4318
Cost
74
Promoting Interoperability
Reporting: Group practice
Hospital and facility affiliations
Facilities where Margaret Johnston bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" - a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.
Green Mountain Dermatology PLLC
Plattsburgh, NY
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Brand vs generic prescribing mix · Generic-heavy
Margaret Johnston - brand share 6.0%
Dermatology Physician average
6% brand-name claims vs 94% generic, on 394 2023 Medicare Part D claims.
The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
394
Total Claims
$189K
Total Drug Cost
171
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 430
- Total Day Supply
- 10,632
- Brand vs Generic
- 6% brand / 94% generic
- Brand Drug Cost
- $174K
- Generic Drug Cost
- $16K
Patient Demographics
- Average Patient Age
- 70.3 years
- Avg HCC Risk Score
- 1.49
- Gender Split
- 61% female / 39% male
- Age Distribution
- <65: 32, 65-74: 78, 75-84: 43, 85+: 18
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Margaret Johnston prescribes most
Top Medicare Part D drugs by claim count, 2023
- Ketoconazole
Ketoconazole
114 claims
- Clobetasol Propion…
Clobetasol Propionate
69 claims
- Triamcinolone Acet…
Triamcinolone Acetonide
46 claims
- Hydrocortisone 35
Hydrocortisone
35 claims
- Minoxidil 21
Minoxidil
21 claims
| Drug | Claims |
|---|---|
| Ketoconazole | 114 |
| Clobetasol Propionate | 69 |
| Triamcinolone Acetonide | 46 |
| Hydrocortisone | 35 |
| Minoxidil | 21 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Dermatology Physician Overview
How Margaret Johnston fits within the Dermatology Physician landscape nationally.
14,610
Dermatology Physician Providers in US
53
States with Dermatology Physician
729
Avg Claims per Provider
Margaret Johnston's 394 claims are below the specialty average of 729.
Nearby Dermatology Physician Providers in Vermont
Other clinicians with the same primary specialty enrolled in Vermont, drawn from the same CMS NPPES roster as Johnston.
Dr. Jamie Alpert
M.D.
Burlington, VT
Dr. Kathy Cook
M.D.
South Burlington, VT
Dr. Lixia Ellis
M.D., PH.D.
Bennington, VT
Dr. Elizabeth Foley
MD
Rutland, VT
Dr. Anita Goodrich
MD
Colchester, VT
Compare Dermatology Physician nationally: see state-by-state distribution →
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the Vermont medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Dermatology Physician peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
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Frequently Asked Questions
What is Margaret Johnston's specialty? ▼
Margaret Johnston specializes in Dermatology Physician and practices in Colchester, Vermont.
How much does Margaret Johnston prescribe under Medicare Part D? ▼
In 2023, Margaret Johnston wrote 394 Medicare Part D claims totaling $189K in drug costs for 171 beneficiaries.
What is Margaret Johnston's Medicare quality score? ▼
Margaret Johnston has a CMS MIPS Final Score of 73.6/100 (Quality: 75.8, Cost: 51.4). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Margaret Johnston located? ▼
Margaret Johnston is located at 354 MOUNTAIN VIEW DR STE 300, Colchester, VT, 05446. Phone: (802) 864-0192.
What is Margaret Johnston's NPI number? ▼
Margaret Johnston's National Provider Identifier (NPI) is 1669932406, issued on 03/20/2019.
Does Margaret Johnston prescribe more brand-name or generic drugs? ▼
Margaret Johnston's prescribing is 6% brand-name and 94% generic drugs by claim count, with $174K in brand drug costs.
How many Dermatology Physician providers are there in the US? ▼
There are 14,610 Dermatology Physician providers across 53 states in the US. The average Dermatology Physician provider writes 729 Medicare Part D claims per year.
What drugs does Margaret Johnston prescribe most often? ▼
Based on 2023 Medicare Part D data, Margaret Johnston's most frequently prescribed drugs include Ketoconazole, Clobetasol Propionate, Triamcinolone Acetonide. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Margaret Johnston accept Medicare? ▼
Margaret Johnston appears in CMS Medicare data with 394 Part D claims and 171 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Margaret Johnston's credentials? ▼
Margaret Johnston's NPI is 1669932406. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.
Data Sources
View source datasets and methodology notes
- Provider Directory
- CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
- Specialty Classification
- NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
- Prescribing Data
- CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
- Quality Performance
- CMS Merit-based Incentive Payment System (MIPS) - 2023 performance year.
- Limitations
- Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.
See our complete data methodology for details on how we collect and process government data.
Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).
Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology
Compiled from official public sources by the PlainDoctor editorial team.