2026 NPPES data Pulmonary Disease Physician NPI 1366537409 M.D.
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IBRAHIM MAJZOUB, M.D.

Pulmonary Disease Physician in CHICAGO, Illinois. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
444
Medicare Part D claims · 17 beneficiaries · Pulmonary Disease Physician avg: 1K
Generic prescribing
76%
generic claims · 24% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$278.18
4 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

IBRAHIM MAJZOUB, M.D. filed 444 Medicare Part D claims in 2023 as a Pulmonary Disease Physician in CHICAGO, Illinois, prescribing 76% generic.

444
Part D claims, 2023
76%
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.

IBRAHIM MAJZOUB, M.D.'s Medicare Part D volume vs every U.S. prescriber

Total Medicare Part D claims, 2023 — across all CMS prescribers nationally

444 Top 38% higher than 62% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). Below this entry. 400–600: 90,619 prescribers (7%). This entry sits in this band. 600–800: 56,224 prescribers (4%). Above this entry. 800–1,000: 40,919 prescribers (3%). Above this entry. 1,000–1,200: 31,827 prescribers (2%). Above this entry. 1,200–1,400: 26,224 prescribers (2%). Above this entry. 1,400–1,600: 21,710 prescribers (2%). Above this entry. 1,600–1,800: 19,072 prescribers (1%). Above this entry. 1,800–2,000: 16,451 prescribers (1%). Above this entry. 2,000–2,200: 213,991 prescribers (16%). Above this entry. This provider 0 2K+ every Part D prescriber (claims/yr), bucketed by value

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 certification likely (heuristic — not verified)

IBRAHIM MAJZOUB, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 2 hospital affiliations — 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 IBRAHIM MAJZOUB, M.D.?

Quality data not reported

NPI registry status

Active

Issued 10/04/2006

NPI 1366537409

Primary specialty

Pulmonary Disease Physician

Mid-sized

9,271 US NPIs in this specialty

Medicare Part D claims

444 70% vs specialty avg

2023 prescription claims

Specialty avg: 1,457

Specialty distribution in Illinois

How Pulmonary Disease Physician compares to other specialties among Illinois providers

Illinois providers

Pulmonary Disease Physician share within Illinois

1. Pulmonary Disease Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Pulmonary Disease Physician share within Illinois

Specialty board-certification context

Estimated specialty board-certified rate — Pulmonary Disease Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Pulmonary Disease Physician ABMS/AOA estimate

Est. board-certified rate (Pulmonary Disease Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Pulmonary Disease Physician) — ABMS / AOA estimate

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).

IBRAHIM MAJZOUB, M.D. appears in the CMS NPPES registry as a Pulmonary Disease Physician provider holding M.D. credentials at 645 S CENTRAL AVE, CHICAGO, IL, 60644, with a listed phone of (847) 800-2824. NPI 1366537409 was issued on 10/04/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what MAJZOUB most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

Medicare Part D records for calendar year 2023 show 444 prescription claims written by this provider, covering 17 Medicare beneficiaries and totaling roughly $64K in drug spend, split 24% brand-name and 76% generic by claim count. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy.

Pulmonary Disease Physician is a mid-sized specialty nationwide, with 9,271 enrolled providers across 53 states and an average of 1,457 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

645 S CENTRAL AVE
CHICAGO, IL 60644

Provider Details

NPI 1366537409
Specialty Pulmonary Disease Physician
Credentials M.D.
Gender Male
NPI Issued 10/04/2006

Hospital and facility affiliations

Facilities where IBRAHIM MAJZOUB, M.D. 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.

ASSOCIATES IN PULMONARY AND CRITICAL CARE LTD
CHICAGO, IL
FOUNDATION FOR OUTREACH SERVICES
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 IBRAHIM MAJZOUB, M.D.. Source: openpaymentsdata.cms.gov.

Total received

$278

Largest payer

Medtronic, 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 — 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 IBRAHIM MAJZOUB, M.D.. To verify IBRAHIM MAJZOUB, 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 · Typical

IBRAHIM MAJZOUB, M.D. — brand share 24.0%
Specialty average (est.)

24% brand-name claims vs 76% generic, on 444 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.

444
Total Claims
$64K
Total Drug Cost
17
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
450
Total Day Supply
8,390
Brand vs Generic
24% brand / 76% generic
Brand Drug Cost
$44K
Generic Drug Cost
$20K
Antibiotic Claims
25

Patient Demographics

Average Patient Age
66.8 years
Avg HCC Risk Score
3.48

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

What IBRAHIM MAJZOUB, M.D. prescribes most

Top Medicare Part D drugs by claim count, 2023

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2023
Drug Claims
Potassium Chloride
42
Eliquis
Apixaban
40
Famotidine
21
Methotrexate
Methotrexate Sodium
20
Quetiapine Fumarate
18
Atorvastatin Calcium
17
Spironolactone
16
Acetylcysteine
15
Enoxaparin Sodium
15
Levetiracetam
15

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

Pulmonary Disease Physician Overview

How IBRAHIM MAJZOUB, M.D. fits within the Pulmonary Disease Physician landscape nationally.

9,271
Pulmonary Disease Physician Providers in US
53
States with Pulmonary Disease Physician
1,457
Avg Claims per Provider

IBRAHIM MAJZOUB, M.D.'s 444 claims are below the specialty average of 1,457.

Nearby Pulmonary Disease Physician Providers in Illinois

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

Compare Pulmonary Disease Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is IBRAHIM MAJZOUB, M.D.'s specialty?
IBRAHIM MAJZOUB, M.D. specializes in Pulmonary Disease Physician and practices in CHICAGO, Illinois. Credentials: M.D..
How much does IBRAHIM MAJZOUB, M.D. prescribe under Medicare Part D?
In 2023, IBRAHIM MAJZOUB, M.D. wrote 444 Medicare Part D claims totaling $64K in drug costs for 17 beneficiaries.
Where is IBRAHIM MAJZOUB, M.D. located?
IBRAHIM MAJZOUB, M.D. is located at 645 S CENTRAL AVE, CHICAGO, IL, 60644. Phone: (847) 800-2824.
What is IBRAHIM MAJZOUB, M.D.'s NPI number?
IBRAHIM MAJZOUB, M.D.'s National Provider Identifier (NPI) is 1366537409, issued on 10/04/2006.
Does IBRAHIM MAJZOUB, M.D. prescribe more brand-name or generic drugs?
IBRAHIM MAJZOUB, M.D.'s prescribing is 24% brand-name and 76% generic drugs by claim count, with $44K in brand drug costs.
How many Pulmonary Disease Physician providers are there in the US?
There are 9,271 Pulmonary Disease Physician providers across 53 states in the US. The average Pulmonary Disease Physician provider writes 1,457 Medicare Part D claims per year.
What drugs does IBRAHIM MAJZOUB, M.D. prescribe most often?
Based on 2023 Medicare Part D data, IBRAHIM MAJZOUB, M.D.'s most frequently prescribed drugs include Potassium Chloride, Eliquis, Famotidine. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does IBRAHIM MAJZOUB, M.D. accept Medicare?
IBRAHIM MAJZOUB, M.D. appears in CMS Medicare data with 444 Part D claims and 17 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify IBRAHIM MAJZOUB, M.D.'s credentials?
IBRAHIM MAJZOUB, M.D.'s NPI is 1366537409 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

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