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2026 NPPES data Dermatology Physician NPI 1437114907 M.D.
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James Grossweiner, M.D.

Dermatology Physician in Naperville, Illinois.

This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 15,011 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
732
Medicare Part D claims · 281 beneficiaries · Dermatology Physician avg: 799
Generic prescribing
95%
generic claims · 5% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
91.4/100
▲ 8 pts above national avg 83.5 · Exceptional
Verify NPI on CMS Methodology
Compiled from official public sources by the editorial process.

What the federal data shows

James Grossweiner, M.D. reported a CMS MIPS final score of 91.4/100 - above the 83.5 national average - and filed 732 Medicare Part D claims in 2024.

91.4/100
MIPS score · +8 vs avg
732
Part D claims, 2024
95%
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.

Federal trust snapshot

What official records show about James Grossweiner, M.D.

Federal records show an active NPI with both Medicare prescribing volume and a measured CMS quality score — objective registry data, not patient reviews.

  • Verified

    NPI registry status

    Active listing in the CMS National Provider Identifier Registry (NPI 1437114907), first enumerated 04/19/2006.

    Source: CMS NPPES

  • Reported

    Medicare Part D participation

    Filed 732 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.

    Source: CMS Part D Prescriber PUF

  • Reported

    CMS quality reporting (MIPS)

    Reported a CMS MIPS final score of 91.4/100 in the Quality Payment Program — a federal quality measure, not a patient review.

    Source: CMS Quality Payment Program

  • Reported

    Board certification signal

    Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.

    Source: NUCC taxonomy + CMS participation heuristic

  • State context

    State board disciplinary context

    Illinois statewide board action statistics are published annually — these figures describe aggregate state activity, not James Grossweiner, M.D.'s individual license status. Verify directly with the state medical board.

    Source: IDFPR annual report 2023

  • Not in federal data

    Individual sanction lookup

    PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.

    Source: State medical board / FSMB

This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.

CMS NPPES provider registry desk

NPI 1437114907 · Dermatology Physician

NPI-10 · ENUM-LEGACY · TAX-MID · MIPS-ABOVE · RX-LIGHT · BOOK-LIGHT · PHOTO-FINISH

  • NPI-10 1437114907
  • ENUM-LEGACY 2006
  • TAX-MID 15K Dermatology Physician
  • MIPS-ABOVE 91.4/100
  • RX-LIGHT 732
  • BOOK-LIGHT 584 in Illinois
  • PHOTO-FINISH Oyetewa Asempa, MD · ±0.1

MIPS final-score neighbourhood

Same-specialty nationwide peers by CMS final score, not geographic proximity

MIPS pts

What this shows Nearest measured MIPS peers for this NUCC specialty (2023 performance year).

Source CMS Quality Payment Program (MIPS) As of 2023

James Grossweiner, M.D.'s MIPS score vs every measured U.S. clinician

CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure. Clinicians whose score CMS assigned without scoring any category are excluded.

91 ≥ 61st percentile 61% of 454,083 measured providers are in lower value bands

0–10: 8,684 measured providers (2%). Below this entry. 10–20: 3,008 measured providers (1%). Below this entry. 20–30: 3,069 measured providers (1%). Below this entry. 30–40: 2,746 measured providers (1%). Below this entry. 40–50: 2,928 measured providers (1%). Below this entry. 50–60: 5,882 measured providers (1%). Below this entry. 60–70: 13,906 measured providers (3%). Below this entry. 70–80: 94,570 measured providers (21%). Below this entry. 80–90: 129,887 measured providers (29%). Below this entry. 90+: 189,403 measured providers (42%). This entry sits in this band. This provider 0 100 every measured MIPS clinician, bucketed by value

Each bar is a band; taller bars hold more measured 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.

The percentile is a conservative whole-score-point band: it counts only measured clinicians in lower score bands. A CMS MIPS metric is not a recommendation or a clinical-quality rating by PlainDoctor. See methodology § corpus placement.

Source CMS Merit-based Incentive Payment System (MIPS) · 2023

Where James Grossweiner, M.D. sits

This provider among dermatology physician peers

Across the 5,700 dermatology physician providers who report both Medicare Part D prescribing and a MIPS quality score, James Grossweiner, M.D. writes more Part D claims than 53% of them and scores higher on MIPS quality than 56% - placing this provider in the high-volume, high-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.

Lower volume · High qualityHigh volume · High qualityLower volume · Lower qualityHigh volume · Lower quality0255075100023.647.370.994.5Part D claim volume, percentile in specialtyMIPS quality, percentilePoint, Part D claim volume, percentile in specialty: 100 · MIPS quality, percentile: 90Point, Part D claim volume, percentile in specialty: 13 · MIPS quality, percentile: 48Point, Part D claim volume, percentile in specialty: 88 · MIPS quality, percentile: 12Point, Part D claim volume, percentile in specialty: 50 · MIPS quality, percentile: 55Point, Part D claim volume, percentile in specialty: 55 · MIPS quality, percentile: 10Point, Part D claim volume, percentile in specialty: 27 · MIPS quality, percentile: 0Point, Part D claim volume, percentile in specialty: 97 · MIPS quality, percentile: 15Point, Part D claim volume, percentile in specialty: 95 · MIPS quality, percentile: 5Point, Part D claim volume, percentile in specialty: 28 · MIPS quality, percentile: 87Point, Part D claim volume, percentile in specialty: 40 · MIPS quality, percentile: 90Point, Part D claim volume, percentile in specialty: 42 · MIPS quality, percentile: 78Point, Part D claim volume, percentile in specialty: 62 · MIPS quality, percentile: 20Point, Part D claim volume, percentile in specialty: 20 · MIPS quality, percentile: 52Point, Part D claim volume, percentile in specialty: 8 · MIPS quality, percentile: 62Point, Part D claim volume, percentile in specialty: 7 · MIPS quality, percentile: 23Point, Part D claim volume, percentile in specialty: 90 · MIPS quality, percentile: 43Point, Part D claim volume, percentile in specialty: 18 · MIPS quality, percentile: 27Point, Part D claim volume, percentile in specialty: 38 · MIPS quality, percentile: 70Point, Part D claim volume, percentile in specialty: 53 · MIPS quality, percentile: 58Point, Part D claim volume, percentile in specialty: 45 · MIPS quality, percentile: 73Point, Part D claim volume, percentile in specialty: 82 · MIPS quality, percentile: 22Point, Part D claim volume, percentile in specialty: 17 · MIPS quality, percentile: 67Point, Part D claim volume, percentile in specialty: 15 · MIPS quality, percentile: 13Point, Part D claim volume, percentile in specialty: 68 · MIPS quality, percentile: 17Point, Part D claim volume, percentile in specialty: 87 · MIPS quality, percentile: 32Point, Part D claim volume, percentile in specialty: 10 · MIPS quality, percentile: 45Point, Part D claim volume, percentile in specialty: 33 · MIPS quality, percentile: 60Point, Part D claim volume, percentile in specialty: 2 · MIPS quality, percentile: 33Point, Part D claim volume, percentile in specialty: 75 · MIPS quality, percentile: 77Point, Part D claim volume, percentile in specialty: 78 · MIPS quality, percentile: 42Point, Part D claim volume, percentile in specialty: 5 · MIPS quality, percentile: 90Point, Part D claim volume, percentile in specialty: 47 · MIPS quality, percentile: 65Point, Part D claim volume, percentile in specialty: 23 · MIPS quality, percentile: 90Point, Part D claim volume, percentile in specialty: 57 · MIPS quality, percentile: 25Point, Part D claim volume, percentile in specialty: 0 · MIPS quality, percentile: 27Point, Part D claim volume, percentile in specialty: 85 · MIPS quality, percentile: 82Point, Part D claim volume, percentile in specialty: 3 · MIPS quality, percentile: 38Point, Part D claim volume, percentile in specialty: 63 · MIPS quality, percentile: 53Point, Part D claim volume, percentile in specialty: 83 · MIPS quality, percentile: 8Point, Part D claim volume, percentile in specialty: 98 · MIPS quality, percentile: 0Point, Part D claim volume, percentile in specialty: 43 · MIPS quality, percentile: 90Point, Part D claim volume, percentile in specialty: 58 · MIPS quality, percentile: 35Point, Part D claim volume, percentile in specialty: 77 · MIPS quality, percentile: 57Point, Part D claim volume, percentile in specialty: 93 · MIPS quality, percentile: 90Point, Part D claim volume, percentile in specialty: 37 · MIPS quality, percentile: 7Point, Part D claim volume, percentile in specialty: 22 · MIPS quality, percentile: 63Point, Part D claim volume, percentile in specialty: 12 · MIPS quality, percentile: 87Point, Part D claim volume, percentile in specialty: 23 · MIPS quality, percentile: 40Point, Part D claim volume, percentile in specialty: 80 · MIPS quality, percentile: 83Point, Part D claim volume, percentile in specialty: 70 · MIPS quality, percentile: 27Point, Part D claim volume, percentile in specialty: 67 · MIPS quality, percentile: 75Point, Part D claim volume, percentile in specialty: 72 · MIPS quality, percentile: 67Point, Part D claim volume, percentile in specialty: 32 · MIPS quality, percentile: 0Point, Part D claim volume, percentile in specialty: 92 · MIPS quality, percentile: 90Point, Part D claim volume, percentile in specialty: 52 · MIPS quality, percentile: 83Point, Part D claim volume, percentile in specialty: 60 · MIPS quality, percentile: 80Point, Part D claim volume, percentile in specialty: 73 · MIPS quality, percentile: 72Point, Part D claim volume, percentile in specialty: 35 · MIPS quality, percentile: 35Point, Part D claim volume, percentile in specialty: 30 · MIPS quality, percentile: 17Point, Part D claim volume, percentile in specialty: 65 · MIPS quality, percentile: 47James Grossweiner, M.D., Part D claim volume, percentile in specialty: 53 · MIPS quality, percentile: 56
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 James Grossweiner, M.D.. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.

✓
Board certification likely (heuristic, not verified)

James Grossweiner, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting - 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 James Grossweiner, M.D.?

High performer (top quartile)

NPI registry status

Active

Issued 04/19/2006

NPI 1437114907

Primary specialty

Dermatology Physician

Mid-sized

15,011 US NPIs in this specialty

Medicare Part D claims

732 8% vs specialty avg

2024 prescription claims

Specialty avg: 799

MIPS final score

91.4/100 7.9 pts vs avg

Exceptional band

vs 83.5 national avg

Specialty distribution in Illinois

How Dermatology Physician compares to other specialties among Illinois providers

Illinois providers
Clinical Social Worker5.2%Physical Therapist4.9%Mental Health Counselor4.5%Speech-Language Pathologist4.2%Student in an Organized Heal…4.1%Pharmacist4.1%Dermatology Physician0.2%
Largest specialties in Illinois (% of in-state providers)

Medicare quality performance, MIPS

James Grossweiner, M.D.'s 2023 MIPS final score plotted against the Dermatology Physician national average

High performer (top quartile)
MIPS Final Score
91.4/100
vs 83.5 national avg · 2023 performance year
0%100%National avg84%91.4%
MIPS final score (Dermatology Physician) - 91.4/100 vs national avg 83.5
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).

Practice Address

1220 HOBSON RD STE 116
Naperville, IL 60540
(630) 355-6660

Provider Details

NPI 1437114907
Specialty Dermatology Physician
Credentials M.D.
Gender Male
NPI Issued 04/19/2006

CMS Quality Score (MIPS)

Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.

91.3557
Final Score
Measured-score avg: 83.5
82.7114
Quality
100
Promoting Interoperability

Reporting: Alternative Payment Model

License & disciplinary context - Illinois IDFPR 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 ~42K Illinois medical licensees in 2023 - they are NOT specific to James Grossweiner, M.D.. To verify James Grossweiner, M.D.'s current license status, search the IDFPR public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.

106
Total board actions, Illinois 2023
Across 103 cases
2.52
Actions per 1,000 licensees
Illinois statewide rate
probation
Most common action type
38 cases

IDFPR 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 Illinois disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.

Brand vs generic prescribing mix · Generic-heavy

James Grossweiner, M.D. - brand share 5.0%
Dermatology Physician average

5% brand-name claims vs 95% generic, on 732 2024 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 2024.

732
Total Claims
$77K
Total Drug Cost
281
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
849.733
Total Day Supply
20,513
Brand vs Generic
5% brand / 95% generic
Brand Drug Cost
$53K
Generic Drug Cost
$24K
Antibiotic Claims
52

Patient Demographics

Average Patient Age
75.6 years
Avg HCC Risk Score
1.01
Gender Split
41% female / 59% male

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.

What James Grossweiner, M.D. prescribes most

Top Medicare Part D drugs by claim count, 2024

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2024
Drug Claims
Triamcinolone Acetonide
 72
Mometasone Furoate
 56
Fluocinonide
 45
Clindamycin Phosphate
 44
Desonide
 44
Metronidazole
 44
Clotrimazole
 37
Mupirocin
 37
Doxycycline Hyclate
 30
Econazole Nitrate
 27

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

More Dermatology Physician in IL → All providers in Illinois → Compare specialties →

Dermatology Physician Overview

How James Grossweiner, M.D. fits within the Dermatology Physician landscape nationally.

15,011
Dermatology Physician Providers in US
53
States with Dermatology Physician
799
Avg Claims per Provider

James Grossweiner, M.D.'s 732 claims are below the specialty average of 799.

Nationwide Dermatology Physician peers with similar MIPS or enrollment year

Two federal-record peer sets for Grossweiner, both outside Illinois so the neighborhoods are not geographic containment.

Similar MIPS final score

Nearest same-specialty clinicians by CMS MIPS final score (91.4 here).

Oyetewa Asempa 91.3 TX Jennifer Ranario 91.3 TX Theodore Rosen 91.3 TX John Wolf 91.3 TX

Same NPPES enumeration year (2006)

Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.

Diane Duvall Atlanta, GA Lawrence Desjarlais Adrian, MI Monika Srivastava Vero Beach, FL Mary Cole Cheyenne, WY

Nearby Dermatology Physician Providers in Illinois

Other clinicians with the same primary specialty enrolled in Illinois, drawn from the same CMS NPPES roster as Grossweiner.

One of 584 Dermatology Physician providers enrolled in Illinois, 5 are shown here.

Dr. Kelly Abate
M.D.
New Lenox, IL
Dr. Cynthia Abban
MD/PHD
Gurnee, IL
Dr. Nadine Abouchaleh
MD
Schaumburg, IL
Dr. Melissa Abrams
M.D.
Vernon Hills, IL
Dr. Beth Adams
M.D.
Chicago, IL

Compare Dermatology Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is James Grossweiner, M.D.'s specialty? ▼
James Grossweiner, M.D. specializes in Dermatology Physician and practices in Naperville, Illinois. Credentials: M.D..
How much does James Grossweiner, M.D. prescribe under Medicare Part D? ▼
In 2024, James Grossweiner, M.D. wrote 732 Medicare Part D claims totaling $77K in drug costs for 281 beneficiaries.
What is James Grossweiner, M.D.'s Medicare quality score? ▼
James Grossweiner, M.D. has a CMS MIPS Final Score of 91.4/100 (Quality: 82.7). The average MIPS Final Score across the 454,083 clinicians with at least one published category score is 83.5; clinicians whose score CMS assigned without scoring any category are excluded from that average. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is James Grossweiner, M.D. located? ▼
James Grossweiner, M.D. is located at 1220 HOBSON RD STE 116, Naperville, IL, 60540. Phone: (630) 355-6660.
What is James Grossweiner, M.D.'s NPI number? ▼
James Grossweiner, M.D.'s National Provider Identifier (NPI) is 1437114907, issued on 04/19/2006.
Does James Grossweiner, M.D. prescribe more brand-name or generic drugs? ▼
James Grossweiner, M.D.'s prescribing is 5% brand-name and 95% generic drugs by claim count, with $53K in brand drug costs.
How many Dermatology Physician providers are there in the US? ▼
There are 15,011 Dermatology Physician providers across 53 states in the US. The average Dermatology Physician provider writes 799 Medicare Part D claims per year.
What drugs does James Grossweiner, M.D. prescribe most often? ▼
Based on 2024 Medicare Part D data, James Grossweiner, M.D.'s most frequently prescribed drugs include Triamcinolone Acetonide, Mometasone Furoate, Fluocinonide. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does James Grossweiner, M.D. accept Medicare? ▼
James Grossweiner, M.D. appears in CMS Medicare data with 732 Part D claims and 281 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify James Grossweiner, M.D.'s credentials? ▼
James Grossweiner, M.D.'s NPI is 1437114907 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 (2024). 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 August 2026 (NPPES) / 2024 (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 editorial process.

Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of August 2026.