2026 NPPES data Internal Medicine Physician NPI 1528044518 MD
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ZAHID AFZAL, MD

Internal Medicine Physician in ORLAND PARK, 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
937
Medicare Part D claims · 333 beneficiaries · Internal Medicine Physician avg: 3K
Generic prescribing
91%
generic claims · 9% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$131.75
6 payments · CMS Open Payments (Sunshine Act)
What the federal data reveals: ZAHID AFZAL, MD is a Internal Medicine Physician ([object Object]) practicing in ORLAND PARK, Illinois with a Medicare Part D prescribing footprint of 937 claims across 333 beneficiaries — 9% brand-name prescribing . Industry payments of $131.75 across 6 transactions are disclosed under CMS Open Payments (Sunshine Act).

What stands out: ZAHID AFZAL, MD filed 937 Medicare Part D claims in 2023 across ORLAND PARK, Illinois. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board certification likely (heuristic — not verified)

ZAHID AFZAL, MD 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).

ZAHID AFZAL, MD at a glance

Quality data not reported

NPI registry status

Active

Issued 12/21/2005

NPI 1528044518

Primary specialty

Internal Medicine Physician

High-volume

172,858 US NPIs in this specialty

Medicare Part D claims

937 66% vs specialty avg

2023 prescription claims

Specialty avg: 2,716

Specialty distribution in Illinois

How Internal Medicine Physician compares to other specialties among Illinois providers

Illinois providers

Internal Medicine Physician share within Illinois

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

Specialty board-certification context

Estimated specialty board-certified rate — Internal Medicine Physician (ABMS / AOA reference)

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

Est. board-certified rate (Internal Medicine Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Internal Medicine 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).

ZAHID AFZAL, MD is a Internal Medicine Physician provider practicing in ORLAND PARK, Illinois, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: MD. NPI: 1528044518. This profile includes practice location, specialty classification, and organizational affiliations from the CMS provider registry. Provider information is self-reported to CMS and updated monthly.

ZAHID AFZAL, MD appears in the CMS NPPES registry as a Internal Medicine Physician provider holding MD credentials at 17047 LA GRANGE RD, ORLAND PARK, IL, 60487, with a listed phone of (815) 300-7764. NPI 1528044518 was issued on 12/21/2005. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what AFZAL 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 937 prescription claims written by this provider, covering 333 Medicare beneficiaries and totaling roughly $186K in drug spend, split 9% brand-name and 91% 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.

Internal Medicine Physician is a high-volume specialty nationwide, with 172,858 enrolled providers across 56 states and an average of 2,716 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

17047 LA GRANGE RD
ORLAND PARK, IL 60487

Provider Details

NPI 1528044518
Specialty Internal Medicine Physician
Credentials MD
Gender Male
NPI Issued 12/21/2005

Hospital and facility affiliations

Facilities where ZAHID AFZAL, 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.

PINNACLE GASTROENTEROLOGY SC
MANTENO, IL
PREMIER SUBURBAN MEDICAL GROUP, PLLC
NEW LENOX, 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 ZAHID AFZAL, MD. Source: openpaymentsdata.cms.gov.

Total received

$132

Largest payer

Janssen Biotech, 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 ZAHID AFZAL, MD. To verify ZAHID AFZAL, 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

ZAHID AFZAL, MD — brand share 9.0%
Specialty average (est.)

9% brand-name claims vs 91% generic, on 937 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.

937
Total Claims
$186K
Total Drug Cost
333
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
1,842
Total Day Supply
52,280
Brand vs Generic
9% brand / 91% generic
Brand Drug Cost
$161K
Generic Drug Cost
$26K
Antibiotic Claims
33

Patient Demographics

Average Patient Age
72.9 years
Avg HCC Risk Score
1.15
Gender Split
62% female / 38% male
Age Distribution
<65: 12, 65-74: 201, 75-84: 100, 85+: 20

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Omeprazole
496
Esomeprazole Magnesium
130
Pantoprazole Sodium
79
Mesalamine
20
Azathioprine
15
Trulance
Plecanatide
15
Humira(Cf) Pen
Adalimumab
14
Linzess
Linaclotide
14
Creon
Lipase/Protease/Amylase
11
Gavilyte-G
"Peg3350/Sod Sulf
N/A

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

Internal Medicine Physician Overview

How ZAHID AFZAL, MD fits within the Internal Medicine Physician landscape nationally.

172,858
Internal Medicine Physician Providers in US
56
States with Internal Medicine Physician
2,716
Avg Claims per Provider

ZAHID AFZAL, MD's 937 claims are below the specialty average of 2,716.

Nearby Internal Medicine Physician Providers in Illinois

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

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

Frequently Asked Questions

What is ZAHID AFZAL, MD's specialty?
ZAHID AFZAL, MD specializes in Internal Medicine Physician and practices in ORLAND PARK, Illinois. Credentials: MD.
How much does ZAHID AFZAL, MD prescribe under Medicare Part D?
In 2023, ZAHID AFZAL, MD wrote 937 Medicare Part D claims totaling $186K in drug costs for 333 beneficiaries.
Where is ZAHID AFZAL, MD located?
ZAHID AFZAL, MD is located at 17047 LA GRANGE RD, ORLAND PARK, IL, 60487. Phone: (815) 300-7764.
What is ZAHID AFZAL, MD's NPI number?
ZAHID AFZAL, MD's National Provider Identifier (NPI) is 1528044518, issued on 12/21/2005.
Does ZAHID AFZAL, MD prescribe more brand-name or generic drugs?
ZAHID AFZAL, MD's prescribing is 9% brand-name and 91% generic drugs by claim count, with $161K in brand drug costs.
How many Internal Medicine Physician providers are there in the US?
There are 172,858 Internal Medicine Physician providers across 56 states in the US. The average Internal Medicine Physician provider writes 2,716 Medicare Part D claims per year.
What drugs does ZAHID AFZAL, MD prescribe most often?
Based on 2023 Medicare Part D data, ZAHID AFZAL, MD's most frequently prescribed drugs include Omeprazole, Esomeprazole Magnesium, Pantoprazole Sodium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does ZAHID AFZAL, MD accept Medicare?
ZAHID AFZAL, MD appears in CMS Medicare data with 937 Part D claims and 333 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify ZAHID AFZAL, MD's credentials?
ZAHID AFZAL, MD's NPI is 1528044518 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

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