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2026 NPPES data Hematology (Internal Medicine) Physician NPI 1821028499 MD
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Leo Gordon, MD

Hematology (Internal Medicine) 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 1,483 in Hematology (Internal Medicine) 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
204
Medicare Part D claims · 56 beneficiaries · Hematology (Internal Medicine) Physician avg: 684
Generic prescribing
55%
generic claims · 45% 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
$5.8K
4 payments · CMS Open Payments (Sunshine Act)
Verify NPI on CMS Methodology
Compiled from official public sources by the editorial process.

What the federal data shows

Leo Gordon, MD reported a CMS MIPS final score of 94.1/100 - above the 83.5 national average - and filed 204 Medicare Part D claims in 2024.

94.1/100
MIPS score · +11 vs avg
204
Part D claims, 2024
55%
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 Leo Gordon, 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 1821028499), first enumerated 07/03/2006.

    Source: CMS NPPES

  • Reported

    Medicare Part D participation

    Filed 204 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.

    Source: NUCC taxonomy + CMS participation heuristic

  • 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

    $5.8K in reported industry payments (4 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 Leo Gordon, 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 1821028499 · Hematology (Internal Medicine) Physician

NPI-10 · ENUM-LEGACY · TAX-NARROW · MIPS-ELITE · RX-LIGHT · BOOK-THIN · PHOTO-FINISH

  • NPI-10 1821028499
  • ENUM-LEGACY 2006
  • TAX-NARROW 1,483
  • MIPS-ELITE 94.1/100
  • RX-LIGHT 204
  • BOOK-THIN 49 in Illinois
  • PHOTO-FINISH Bhavana Bhatnagar, D… · ±0.0

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

Leo Gordon, 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

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 Leo Gordon, MD sits

This provider among hematology (internal medicine) physician peers

Across the 446 hematology (internal medicine) physician providers who report both Medicare Part D prescribing and a MIPS quality score, Leo Gordon, MD writes more Part D claims than 32% of them and scores higher on MIPS quality than 69% - placing this provider in the lower-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: 72 · MIPS quality, percentile: 23Point, Part D claim volume, percentile in specialty: 7 · MIPS quality, percentile: 67Point, Part D claim volume, percentile in specialty: 63 · MIPS quality, percentile: 5Point, Part D claim volume, percentile in specialty: 77 · MIPS quality, percentile: 75Point, Part D claim volume, percentile in specialty: 50 · MIPS quality, percentile: 30Point, Part D claim volume, percentile in specialty: 45 · MIPS quality, percentile: 77Point, Part D claim volume, percentile in specialty: 70 · MIPS quality, percentile: 15Point, Part D claim volume, percentile in specialty: 98 · MIPS quality, percentile: 57Point, Part D claim volume, percentile in specialty: 67 · MIPS quality, percentile: 62Point, Part D claim volume, percentile in specialty: 75 · MIPS quality, percentile: 70Point, Part D claim volume, percentile in specialty: 87 · MIPS quality, percentile: 42Point, Part D claim volume, percentile in specialty: 27 · MIPS quality, percentile: 37Point, Part D claim volume, percentile in specialty: 38 · MIPS quality, percentile: 85Point, Part D claim volume, percentile in specialty: 78 · MIPS quality, percentile: 88Point, Part D claim volume, percentile in specialty: 93 · MIPS quality, percentile: 22Point, Part D claim volume, percentile in specialty: 60 · MIPS quality, percentile: 60Point, Part D claim volume, percentile in specialty: 47 · MIPS quality, percentile: 32Point, Part D claim volume, percentile in specialty: 0 · MIPS quality, percentile: 77Point, Part D claim volume, percentile in specialty: 33 · MIPS quality, percentile: 55Point, Part D claim volume, percentile in specialty: 12 · MIPS quality, percentile: 58Point, Part D claim volume, percentile in specialty: 2 · MIPS quality, percentile: 2Point, Part D claim volume, percentile in specialty: 80 · MIPS quality, percentile: 50Point, Part D claim volume, percentile in specialty: 58 · MIPS quality, percentile: 52Point, Part D claim volume, percentile in specialty: 53 · MIPS quality, percentile: 27Point, Part D claim volume, percentile in specialty: 55 · MIPS quality, percentile: 32Point, Part D claim volume, percentile in specialty: 95 · MIPS quality, percentile: 45Point, Part D claim volume, percentile in specialty: 10 · MIPS quality, percentile: 90Point, Part D claim volume, percentile in specialty: 82 · MIPS quality, percentile: 53Point, Part D claim volume, percentile in specialty: 5 · MIPS quality, percentile: 48Point, Part D claim volume, percentile in specialty: 13 · MIPS quality, percentile: 7Point, Part D claim volume, percentile in specialty: 25 · MIPS quality, percentile: 27Point, Part D claim volume, percentile in specialty: 42 · MIPS quality, percentile: 13Point, Part D claim volume, percentile in specialty: 40 · MIPS quality, percentile: 10Point, Part D claim volume, percentile in specialty: 8 · MIPS quality, percentile: 8Point, Part D claim volume, percentile in specialty: 90 · MIPS quality, percentile: 90Point, Part D claim volume, percentile in specialty: 52 · MIPS quality, percentile: 90Point, Part D claim volume, percentile in specialty: 100 · MIPS quality, percentile: 82Point, Part D claim volume, percentile in specialty: 3 · MIPS quality, percentile: 90Point, Part D claim volume, percentile in specialty: 43 · MIPS quality, percentile: 35Point, Part D claim volume, percentile in specialty: 88 · MIPS quality, percentile: 62Point, Part D claim volume, percentile in specialty: 68 · MIPS quality, percentile: 40Point, Part D claim volume, percentile in specialty: 62 · MIPS quality, percentile: 87Point, Part D claim volume, percentile in specialty: 73 · MIPS quality, percentile: 65Point, Part D claim volume, percentile in specialty: 17 · MIPS quality, percentile: 90Point, Part D claim volume, percentile in specialty: 23 · MIPS quality, percentile: 77Point, Part D claim volume, percentile in specialty: 32 · MIPS quality, percentile: 47Point, Part D claim volume, percentile in specialty: 48 · MIPS quality, percentile: 25Point, Part D claim volume, percentile in specialty: 97 · MIPS quality, percentile: 83Point, Part D claim volume, percentile in specialty: 83 · MIPS quality, percentile: 20Point, Part D claim volume, percentile in specialty: 85 · MIPS quality, percentile: 73Point, Part D claim volume, percentile in specialty: 57 · MIPS quality, percentile: 15Point, Part D claim volume, percentile in specialty: 28 · MIPS quality, percentile: 90Point, Part D claim volume, percentile in specialty: 15 · MIPS quality, percentile: 15Point, Part D claim volume, percentile in specialty: 37 · MIPS quality, percentile: 38Point, Part D claim volume, percentile in specialty: 22 · MIPS quality, percentile: 43Point, Part D claim volume, percentile in specialty: 92 · MIPS quality, percentile: 0Point, Part D claim volume, percentile in specialty: 35 · MIPS quality, percentile: 67Point, Part D claim volume, percentile in specialty: 20 · MIPS quality, percentile: 2Point, Part D claim volume, percentile in specialty: 18 · MIPS quality, percentile: 10Point, Part D claim volume, percentile in specialty: 65 · MIPS quality, percentile: 90Leo Gordon, MD, Part D claim volume, percentile in specialty: 32 · MIPS quality, percentile: 69
Part D claim volume vs MIPS quality, by specialty percentile

Each dot is one hematology (internal medicine) physician peer from a representative sample of 60; the gold marker is Leo Gordon, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.

✓
Board certification likely (heuristic, not verified)

Leo Gordon, 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 Leo Gordon, MD?

High performer (top quartile)

NPI registry status

Active

Issued 07/03/2006

NPI 1821028499

Primary specialty

Hematology (Internal Medicine) Physician

Niche

1,483 US NPIs in this specialty

Medicare Part D claims

204 70% vs specialty avg

2024 prescription claims

Specialty avg: 684

MIPS final score

94.1/100 10.6 pts vs avg

Exceptional band

vs 83.5 national avg

Specialty distribution in Illinois

How Hematology (Internal Medicine) 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%Hematology (Internal Medicin…0%
Largest specialties in Illinois (% of in-state providers)

Medicare quality performance, MIPS

Leo Gordon, MD's 2023 MIPS final score plotted against the Hematology (Internal Medicine) Physician national average

High performer (top quartile)
MIPS Final Score
94.1/100
vs 83.5 national avg · 2023 performance year
0%100%National avg84%94.1%
MIPS final score (Hematology (Internal Medicine) Physician) - 94.1/100 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

675 N SAINT CLAIR ST
Chicago, IL 60611
(312) 695-0990

Provider Details

NPI 1821028499
Specialty Hematology (Internal Medicine) Physician
Credentials MD
Gender Male
NPI Issued 07/03/2006

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 Leo Gordon, 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 Leo Gordon, MD. Source: openpaymentsdata.cms.gov.

Total received

$5.8K

Largest payer

Novartis Pharmaceuticals Corporation

Most common payment type

Consulting Fee

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 Leo Gordon, MD. To verify Leo Gordon, 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 · Above average

Leo Gordon, MD - brand share 45.0%
Hematology (Internal Medicine) Physician average

45% brand-name claims vs 55% generic, on 204 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.

204
Total Claims
$1.2M
Total Drug Cost
56
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
265.767
Total Day Supply
7,365
Brand vs Generic
45% brand / 55% generic
Brand Drug Cost
$1.2M
Generic Drug Cost
$4K
Antibiotic Claims
30

Patient Demographics

Average Patient Age
74.4 years
Avg HCC Risk Score
2.51
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 Leo Gordon, MD 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
Acyclovir
 32
Brukinsa
Zanubrutinib
32
Sulfamethoxazole-Trimethoprim
Sulfamethoxazole/Trimethoprim
26
Imbruvica
Ibrutinib
19
Venclexta
Venetoclax
11

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

More Hematology (Internal Medicine) Physician in IL → All providers in Illinois → Compare specialties →

Hematology (Internal Medicine) Physician Overview

How Leo Gordon, MD fits within the Hematology (Internal Medicine) Physician landscape nationally.

1,483
Hematology (Internal Medicine) Physician Providers in US
50
States with Hematology (Internal Medicine) Physician
684
Avg Claims per Provider

Leo Gordon, MD's 204 claims are below the specialty average of 684.

Nationwide Hematology (Internal Medicine) Physician peers with similar MIPS or enrollment year

Two federal-record peer sets for Gordon, 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).

Bhavana Bhatnagar 94.1 WV Andrew Weber 94 FL Mohamed El-Tarabily 94.3 WY Robert Kaplan 93.8 PA

Same NPPES enumeration year (2006)

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

Ann Farrell Silver Spring, MD Vikas Malhotra Spring Hill, FL Daniel Lukowicz Warwick, RI Manuel Macapinlac Sequim, WA

Nearby Hematology (Internal Medicine) Physician Providers in Illinois

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

One of 49 Hematology (Internal Medicine) Physician providers enrolled in Illinois, 5 are shown here.

Dr. Rosalinda Aloran
M.D.
Elmwood Park, IL
Dr. Saad Arain
M.D.
Evanston, IL
Dr. Fahrettin Covut
M.D.
Rockford, IL
Dr. Irene Dehghan-Paz
MD
Chicago, IL
Kunal Desai
MD MBA MS
Chicago, IL

Compare Hematology (Internal Medicine) Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is Leo Gordon, MD's specialty? ▼
Leo Gordon, MD specializes in Hematology (Internal Medicine) Physician and practices in Chicago, Illinois. Credentials: MD.
How much does Leo Gordon, MD prescribe under Medicare Part D? ▼
In 2024, Leo Gordon, MD wrote 204 Medicare Part D claims totaling $1.2M in drug costs for 56 beneficiaries.
What is Leo Gordon, MD's Medicare quality score? ▼
Leo Gordon, 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 Leo Gordon, MD located? ▼
Leo Gordon, MD is located at 675 N SAINT CLAIR ST, Chicago, IL, 60611. Phone: (312) 695-0990.
What is Leo Gordon, MD's NPI number? ▼
Leo Gordon, MD's National Provider Identifier (NPI) is 1821028499, issued on 07/03/2006.
Does Leo Gordon, MD prescribe more brand-name or generic drugs? ▼
Leo Gordon, MD's prescribing is 45% brand-name and 55% generic drugs by claim count, with $1.2M in brand drug costs.
How many Hematology (Internal Medicine) Physician providers are there in the US? ▼
There are 1,483 Hematology (Internal Medicine) Physician providers across 50 states in the US. The average Hematology (Internal Medicine) Physician provider writes 684 Medicare Part D claims per year.
What drugs does Leo Gordon, MD prescribe most often? ▼
Based on 2024 Medicare Part D data, Leo Gordon, MD's most frequently prescribed drugs include Acyclovir, Brukinsa, Sulfamethoxazole-Trimethoprim. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Leo Gordon, MD accept Medicare? ▼
Leo Gordon, MD appears in CMS Medicare data with 204 Part D claims and 56 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Leo Gordon, MD's credentials? ▼
Leo Gordon, MD's NPI is 1821028499 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

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.