NPI registry status
Active
2026 NPPES data Dermatology Physician NPI 1851656516 MD
Verify on CMS → Dianne De Leon, MD
Dermatology Physician in Chicago, 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
294
Medicare Part D claims · 120 beneficiaries · Dermatology Physician avg: 799
Generic prescribing
94%
generic claims · 6% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
94.1/100
▲ 11 pts above national avg 83.5 · Exceptional
Industry payments
$99.99
1 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Dianne De Leon, MD reported a CMS MIPS final score of 94.1/100 - above the 83.5 national average - and filed 294 Medicare Part D claims in 2024.
- 94.1/100
- MIPS score · +11 vs avg
- 294
- Part D claims, 2024
- 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.
Federal trust snapshot
What official records show about Dianne De Leon, MD
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 1851656516), first enumerated 07/09/2012.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 294 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 94.1/100 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.
- Reported
Hospital affiliations
1 CMS Care Compare hospital affiliation on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- Reported
Industry payment transparency
$99.99 in reported industry payments (1 transfers) in 2024 under the federal Sunshine Act — disclosed transfers of value, not a quality rating.
Source: CMS Open Payments
- State context
State board disciplinary context
Illinois statewide board action statistics are published annually — these figures describe aggregate state activity, not Dianne De Leon, MD'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 1851656516 · Dermatology Physician
NPI-10 · ENUM-MID · TAX-MID · MIPS-ELITE · RX-LIGHT · BOOK-LIGHT · PHOTO-FINISH
- NPI-10 1851656516
- ENUM-MID 2012
- TAX-MID 15K Dermatology Physician
- MIPS-ELITE 94.1/100
- RX-LIGHT 294
- BOOK-LIGHT 584 in Illinois
- PHOTO-FINISH Robert Rothbaum · ±0.0
MIPS final-score neighbourhood
Same-specialty nationwide peers by CMS final score, not geographic proximity
- De Leon · this p…
De Leon · this provider
94.1 MIPS pts
- Michael Kolodney…
Michael Kolodney
94.1 MIPS pts
- Robert Rothbaum …
Robert Rothbaum
94.1 MIPS pts
- Colleen Beatty ·…
Colleen Beatty
94.1 MIPS pts
- Sarah Campbell ·…
Sarah Campbell
94.1 MIPS pts
What this shows Nearest measured MIPS peers for this NUCC specialty (2023 performance year).
Dianne De Leon, MD'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.
94 ≥ 73rd percentile 73% of 454,083 measured providers are in lower value bands
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 Dianne De Leon, MD 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, Dianne De Leon, MD writes more Part D claims than 20% of them and scores higher on MIPS quality than 63% - placing this provider in the lower-volume, high-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Each dot is one dermatology physician peer from a representative sample of 60; the gold marker is Dianne De Leon, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Dianne De Leon, MD 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 Dianne De Leon, MD?
High performer (top quartile)Primary specialty
Dermatology Physician
Medicare Part D claims
294 63% vs specialty avg
MIPS final score
94.1/100 10.6 pts vs avg
Specialty distribution in Illinois
How Dermatology Physician compares to other specialties among Illinois providers
Medicare quality performance, MIPS
Dianne De Leon, MD's 2023 MIPS final score plotted against the Dermatology Physician national average
- MIPS Final Score
- 94.1/100
- vs 83.5 national avg · 2023 performance year
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
Provider Details
| NPI | 1851656516 |
|---|---|
| Specialty | Dermatology Physician |
| Credentials | MD |
| Gender | Female |
| NPI Issued | 07/09/2012 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
94.1036
Final Score
Measured-score avg: 83.5
82.5938
Quality
100
Promoting Interoperability
Reporting: Alternative Payment Model
Hospital and facility affiliations
Facilities where Dianne De Leon, MD 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.
Northwestern Medical Faculty Foundation
Chicago, IL
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
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 Dianne De Leon, MD. Source: openpaymentsdata.cms.gov.
Total received
$100
Largest payer
Janssen Biotech, Inc.
Most common payment type
Education
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 - 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 Dianne De Leon, MD. To verify Dianne De Leon, MD'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
Dianne De Leon, MD - brand share 6.0%
Dermatology Physician average
6% brand-name claims vs 94% generic, on 294 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.
294
Total Claims
$11K
Total Drug Cost
120
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 310.2
- Total Day Supply
- 7,517
- Brand vs Generic
- 6% brand / 94% generic
- Brand Drug Cost
- $4K
- Generic Drug Cost
- $7K
Patient Demographics
- Average Patient Age
- 71.8 years
- Avg HCC Risk Score
- 1.02
- Gender Split
- 56% female / 44% male
- Age Distribution
- <65: 16, 65-74: 56, 75-84: N/A, 85+: N/A
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Dianne De Leon, MD prescribes most
Top Medicare Part D drugs by claim count, 2024
- Ketoconazole
Ketoconazole
80 claims
- Clindamycin Phosph…
Clindamycin Phosphate
40 claims
- Triamcinolone Acet…
Triamcinolone Acetonide
39 claims
- Econazole Nitrate 22
Econazole Nitrate
22 claims
- Hydrocortisone 19
Hydrocortisone
19 claims
- Mupirocin 18
Mupirocin
18 claims
| Drug | Claims |
|---|---|
| Ketoconazole | 80 |
| Clindamycin Phosphate | 40 |
| Triamcinolone Acetonide | 39 |
| Econazole Nitrate | 22 |
| Hydrocortisone | 19 |
| Mupirocin | 18 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Dermatology Physician Overview
How Dianne De Leon, MD fits within the Dermatology Physician landscape nationally.
15,011
Dermatology Physician Providers in US
53
States with Dermatology Physician
799
Avg Claims per Provider
Dianne De Leon, MD's 294 claims are below the specialty average of 799.
Nationwide Dermatology Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for De Leon, both outside Illinois so the neighborhoods are not geographic containment.
Similar MIPS final score
Nearest same-specialty clinicians by CMS MIPS final score (94.1 here).
Same NPPES enumeration year (2012)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Dermatology Physician Providers in Illinois
Other clinicians with the same primary specialty enrolled in Illinois, drawn from the same CMS NPPES roster as De Leon.
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 Dianne De Leon, MD's specialty? ▼
Dianne De Leon, MD specializes in Dermatology Physician and practices in Chicago, Illinois. Credentials: MD.
How much does Dianne De Leon, MD prescribe under Medicare Part D? ▼
In 2024, Dianne De Leon, MD wrote 294 Medicare Part D claims totaling $11K in drug costs for 120 beneficiaries.
What is Dianne De Leon, MD's Medicare quality score? ▼
Dianne De Leon, MD has a CMS MIPS Final Score of 94.1/100 (Quality: 82.6). 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 Dianne De Leon, MD located? ▼
Dianne De Leon, MD is located at 4732 N LINCOLN AVE STE 200, Chicago, IL, 60625. Phone: (312) 695-8106.
What is Dianne De Leon, MD's NPI number? ▼
Dianne De Leon, MD's National Provider Identifier (NPI) is 1851656516, issued on 07/09/2012.
Does Dianne De Leon, MD prescribe more brand-name or generic drugs? ▼
Dianne De Leon, MD's prescribing is 6% brand-name and 94% generic drugs by claim count, with $4K 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 Dianne De Leon, MD prescribe most often? ▼
Based on 2024 Medicare Part D data, Dianne De Leon, MD's most frequently prescribed drugs include Ketoconazole, Clindamycin Phosphate, Triamcinolone Acetonide. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Dianne De Leon, MD accept Medicare? ▼
Dianne De Leon, MD appears in CMS Medicare data with 294 Part D claims and 120 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Dianne De Leon, MD's credentials? ▼
Dianne De Leon, MD's NPI is 1851656516 with credentials MD. 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
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.