NPI registry status
Active
2026 NPPES data Medical Oncology Physician NPI 1689867541 MD
Verify on CMS → Syed Ahmed, MD
Medical Oncology Physician in Oak Brook, 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 3,792 in Medical Oncology 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
785
Medicare Part D claims · 140 beneficiaries · Medical Oncology Physician avg: 689
Generic prescribing
70%
generic claims · 30% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$382.06
4 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Syed Ahmed, MD filed 785 Medicare Part D claims in 2023 as a Medical Oncology Physician in Oak Brook, Illinois, prescribing 70% generic.
- 785
- Part D claims, 2023
- 70%
- 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.
Syed Ahmed, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
785 Top 29% higher than 71% of 1,370,886 prescribers
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)
Syed Ahmed, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 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 Syed Ahmed, MD?
Quality data not reportedPrimary specialty
Medical Oncology Physician
Medicare Part D claims
785 14% vs specialty avg
Specialty distribution in Illinois
How Medical Oncology Physician compares to other specialties among Illinois providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Medical Oncology Physician. Verify directly:
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).
Syed Ahmed, MD appears in the CMS NPPES registry as a Medical Oncology Physician provider holding MD credentials at 1001 COMMERCE DR STE 700, Oak Brook, IL, 60523, with a listed phone of (331) 732-4490. NPI 1689867541 was issued on 08/23/2007.
Medicare Part D records for calendar year 2023 show 785 prescription claims written by this provider, covering 140 Medicare beneficiaries and totaling roughly $1.7 million in drug spend, split 30% brand-name and 70% generic by claim count, with an opioid prescribing rate of 5.6%.
Medical Oncology Physician is a narrow specialty nationwide, with 3,792 enrolled providers across 53 states and an average of 689 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
Provider Details
| NPI | 1689867541 |
|---|---|
| Specialty | Medical Oncology Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 08/23/2007 |
Hospital and facility affiliations
Facilities where Syed Ahmed, 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
Oak Brook, 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 Syed Ahmed, MD. Source: openpaymentsdata.cms.gov.
Total received
$382
Largest payer
AstraZeneca Pharmaceuticals LP
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 Syed Ahmed, MD. To verify Syed Ahmed, 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
Syed Ahmed, MD - brand share 30.0%
Medical Oncology Physician average
30% brand-name claims vs 70% generic, on 785 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.
785
Total Claims
$1.7M
Total Drug Cost
140
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,188
- Total Day Supply
- 32,524
- Brand vs Generic
- 30% brand / 70% generic
- Brand Drug Cost
- $1.6M
- Generic Drug Cost
- $119K
- Opioid Claims
- 44 (5.6% rate)
- Antibiotic Claims
- 36
Patient Demographics
- Average Patient Age
- 73.3 years
- Avg HCC Risk Score
- 2.39
- Gender Split
- 57% female / 43% male
- Age Distribution
- <65: 14, 65-74: 66, 75-84: 49, 85+: 11
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Syed Ahmed, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Eliquis
Eliquis
74 claims
- Warfarin Sodium
Warfarin Sodium
53 claims
- Anastrozole
Anastrozole
47 claims
- Xarelto
Xarelto
31 claims
- Prednisone 24
Prednisone
24 claims
- Hydrocodone-Acetam… 22
Hydrocodone-Acetaminophen
22 claims
- Prochlorperazine M… 22
Prochlorperazine Maleate
22 claims
- Acyclovir 17
Acyclovir
17 claims
| Drug | Claims |
|---|---|
| Eliquis Apixaban | 74 |
| Warfarin Sodium | 53 |
| Anastrozole | 47 |
| Xarelto Rivaroxaban | 31 |
| Prednisone | 24 |
| Hydrocodone-Acetaminophen Hydrocodone/Acetaminophen | 22 |
| Prochlorperazine Maleate | 22 |
| Acyclovir | 17 |
| Calquence Acalabrutinib Maleate | 17 |
| Imbruvica Ibrutinib | 17 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Medical Oncology Physician Overview
How Syed Ahmed, MD fits within the Medical Oncology Physician landscape nationally.
3,792
Medical Oncology Physician Providers in US
53
States with Medical Oncology Physician
689
Avg Claims per Provider
Syed Ahmed, MD's 785 claims are above the specialty average of 689.
Nearby Medical Oncology Physician Providers in Illinois
Other clinicians with the same primary specialty enrolled in Illinois, drawn from the same CMS NPPES roster as Ahmed.
Ahmad Abu-Hashyeh
Moline, IL
Dr. Matthew Adess
MD
Highland Park, IL
Dr. Vasia Ahmed
M.D.
Tinley Park, IL
Dr. Eugene Ahn
M.D.
Chicago, IL
Dr. Muhammad Ali
M.D
Quincy, IL
Compare Medical Oncology Physician nationally: see state-by-state distribution →
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the Illinois medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Medical Oncology Physician peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
Healthcare Guides
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Medical Specialties Explained
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Understanding Medicare Claims Data
What prescribing data reveals about a provider
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How insurance networks affect your costs
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Frequently Asked Questions
What is Syed Ahmed, MD's specialty? ▼
Syed Ahmed, MD specializes in Medical Oncology Physician and practices in Oak Brook, Illinois. Credentials: MD.
How much does Syed Ahmed, MD prescribe under Medicare Part D? ▼
In 2023, Syed Ahmed, MD wrote 785 Medicare Part D claims totaling $1.7M in drug costs for 140 beneficiaries.
Where is Syed Ahmed, MD located? ▼
Syed Ahmed, MD is located at 1001 COMMERCE DR STE 700, Oak Brook, IL, 60523. Phone: (331) 732-4490.
What is Syed Ahmed, MD's NPI number? ▼
Syed Ahmed, MD's National Provider Identifier (NPI) is 1689867541, issued on 08/23/2007.
Does Syed Ahmed, MD prescribe more brand-name or generic drugs? ▼
Syed Ahmed, MD's prescribing is 30% brand-name and 70% generic drugs by claim count, with $1.6M in brand drug costs.
Does Syed Ahmed, MD prescribe opioids? ▼
Yes, Syed Ahmed, MD had 44 opioid claims in 2023 with an opioid prescribing rate of 5.6%.
How many Medical Oncology Physician providers are there in the US? ▼
There are 3,792 Medical Oncology Physician providers across 53 states in the US. The average Medical Oncology Physician provider writes 689 Medicare Part D claims per year.
What drugs does Syed Ahmed, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Syed Ahmed, MD's most frequently prescribed drugs include Eliquis, Warfarin Sodium, Anastrozole. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Syed Ahmed, MD accept Medicare? ▼
Syed Ahmed, MD appears in CMS Medicare data with 785 Part D claims and 140 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Syed Ahmed, MD's credentials? ▼
Syed Ahmed, MD's NPI is 1689867541 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 (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
Compiled from official public sources by the PlainDoctor editorial team.