NPI registry status
Active
2026 NPPES data Dermatology Physician NPI 1659332864 M.D.
Verify on CMS → Charles Gropper, M.D.
Dermatology Physician in Bronx, New York.
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
1K
Medicare Part D claims · 191 beneficiaries · Dermatology Physician avg: 729
Generic prescribing
81%
generic claims · 19% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$2.8K
39 payments · CMS Open Payments (Sunshine Act)
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
Charles Gropper, M.D. filed 1,197 Medicare Part D claims in 2023 as a Dermatology Physician in Bronx, New York, prescribing 81% generic.
- 1K
- Part D claims, 2023
- 81%
- generic prescribing
- $2.8K
- industry payments (Sunshine Act)
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.
Charles Gropper, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
1,197 Top 23% higher than 77% of 1,370,886 prescribers
Each bar is a band; taller bars hold more prescribers. 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 Medicare Part D Prescriber Public Use File · 2023
◑
Board-eligible specialty (heuristic, not verified)
Charles Gropper, M.D. practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Charles Gropper, M.D.?
Quality data not reportedPrimary specialty
Dermatology Physician
Medicare Part D claims
1,197 64% vs specialty avg
Specialty distribution in New York
How Dermatology Physician compares to other specialties among New York providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Dermatology Physician. Verify directly:
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).
Charles Gropper, M.D. appears in the CMS NPPES registry as a Dermatology Physician provider holding M.D. credentials at 4487 3RD AVE FL 2, Bronx, NY, 10457, with a listed phone of (718) 960-5085. NPI 1659332864 was issued on 03/29/2006.
Medicare Part D records for calendar year 2023 show 1,197 prescription claims written by this provider, covering 191 Medicare beneficiaries and totaling roughly $1.0 million in drug spend, split 19% brand-name and 81% generic by claim count.
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 | 1659332864 |
|---|---|
| Specialty | Dermatology Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 03/29/2006 |
Industry payments received (2024) - CMS Open Payments transparency data
The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for Charles Gropper, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$2.8K
Largest payer
Takeda Pharmaceuticals U.S.A., Inc.
Most common payment type
Food and Beverage
Industry payments are not necessarily indicators of bias, they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.
License & disciplinary context - New York NYSBPMC 2023 annual report
Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~100K New York medical licensees in 2023 - they are NOT specific to Charles Gropper, M.D.. To verify Charles Gropper, M.D.'s current license status, search the NYSBPMC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
312
Total board actions, New York 2023
Across 302 cases
3.12
Actions per 1,000 licensees
New York statewide rate
probation
Most common action type
89 cases
NYSBPMC publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the New York disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Typical
Charles Gropper, M.D. - brand share 19.0%
Dermatology Physician average
19% brand-name claims vs 81% generic, on 1,197 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.
1,197
Total Claims
$1.0M
Total Drug Cost
191
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,236
- Total Day Supply
- 32,336
- Brand vs Generic
- 19% brand / 81% generic
- Brand Drug Cost
- $986K
- Generic Drug Cost
- $38K
- Antibiotic Claims
- 17
Patient Demographics
- Average Patient Age
- 68.6 years
- Avg HCC Risk Score
- 1.57
- Gender Split
- 63% female / 37% male
- Age Distribution
- <65: 49, 65-74: 79, 75-84: 49, 85+: 14
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Charles Gropper, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Ketoconazole
Ketoconazole
159 claims
- Triamcinolone Acet…
Triamcinolone Acetonide
153 claims
- Fluocinonide
Fluocinonide
78 claims
- Hydrocortisone
Hydrocortisone
77 claims
- Mometasone Furoate
Mometasone Furoate
72 claims
- Ammonium Lactate
Ammonium Lactate
71 claims
- Halobetasol Propio…
Halobetasol Propionate
67 claims
- Clindamycin Phosph… 60
Clindamycin Phosphate
60 claims
| Drug | Claims |
|---|---|
| Ketoconazole | 159 |
| Triamcinolone Acetonide | 153 |
| Fluocinonide | 78 |
| Hydrocortisone | 77 |
| Mometasone Furoate | 72 |
| Ammonium Lactate | 71 |
| Halobetasol Propionate | 67 |
| Clindamycin Phosphate | 60 |
| Mupirocin | 52 |
| Dupixent Pen Dupilumab | 49 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Dermatology Physician Overview
How Charles Gropper, M.D. fits within the Dermatology Physician landscape nationally.
14,610
Dermatology Physician Providers in US
53
States with Dermatology Physician
729
Avg Claims per Provider
Charles Gropper, M.D.'s 1,197 claims are above the specialty average of 729.
Nearby Dermatology Physician Providers in New York
Other clinicians with the same primary specialty enrolled in New York, drawn from the same CMS NPPES roster as Gropper.
Dr. Jules Abadi
MD
East Patchogue, NY
Dr. Dale Abadir
MD
Rye Brook, NY
Dr. Roxanne Abitbol
M.D.
Oceanside, NY
Dr. Ariel Abraham
M.D.
Southampton, NY
Dr. John Abraham
M.D.
Staten Island, NY
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 New York 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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Understanding Medicare Claims Data
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How insurance networks affect your costs
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Frequently Asked Questions
What is Charles Gropper, M.D.'s specialty? ▼
Charles Gropper, M.D. specializes in Dermatology Physician and practices in Bronx, New York. Credentials: M.D..
How much does Charles Gropper, M.D. prescribe under Medicare Part D? ▼
In 2023, Charles Gropper, M.D. wrote 1,197 Medicare Part D claims totaling $1.0M in drug costs for 191 beneficiaries.
Where is Charles Gropper, M.D. located? ▼
Charles Gropper, M.D. is located at 4487 3RD AVE FL 2, Bronx, NY, 10457. Phone: (718) 960-5085.
What is Charles Gropper, M.D.'s NPI number? ▼
Charles Gropper, M.D.'s National Provider Identifier (NPI) is 1659332864, issued on 03/29/2006.
Does Charles Gropper, M.D. prescribe more brand-name or generic drugs? ▼
Charles Gropper, M.D.'s prescribing is 19% brand-name and 81% generic drugs by claim count, with $986K 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 Charles Gropper, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Charles Gropper, M.D.'s most frequently prescribed drugs include Ketoconazole, Triamcinolone Acetonide, Fluocinonide. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Charles Gropper, M.D. accept Medicare? ▼
Charles Gropper, M.D. appears in CMS Medicare data with 1,197 Part D claims and 191 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Charles Gropper, M.D.'s credentials? ▼
Charles Gropper, M.D.'s NPI is 1659332864 with credentials M.D.. 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.
- 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.