2026 NPPES data Retina Specialist (Ophthalmology) Physician NPI 1003542101 MD, PHD
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AYMAN ELNAHRY, MD, PHD

Retina Specialist (Ophthalmology) Physician in BETHESDA, Maryland. 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
61
Medicare Part D claims · 28 beneficiaries · Retina Specialist (Ophthalmology) Physician avg: 558
Generic prescribing
79%
generic claims · 21% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$770.57
11 payments · CMS Open Payments (Sunshine Act)
What the federal data reveals: AYMAN ELNAHRY, MD, PHD is a Retina Specialist (Ophthalmology) Physician ([object Object]) practicing in BETHESDA, Maryland with a Medicare Part D prescribing footprint of 61 claims across 28 beneficiaries — 21% brand-name prescribing . Industry payments of $770.57 across 11 transactions are disclosed under CMS Open Payments (Sunshine Act).

What stands out: AYMAN ELNAHRY, MD, PHD filed 61 Medicare Part D claims in 2023 across BETHESDA, Maryland. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board certification likely (heuristic — not verified)

AYMAN ELNAHRY, MD, PHD 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).

AYMAN ELNAHRY, MD, PHD at a glance

Quality data not reported

NPI registry status

Active

Issued 07/29/2022

NPI 1003542101

Primary specialty

Retina Specialist (Ophthalmology) Physician

Niche

913 US NPIs in this specialty

Medicare Part D claims

61 89% vs specialty avg

2023 prescription claims

Specialty avg: 558

Specialty distribution in Maryland

How Retina Specialist (Ophthalmology) Physician compares to other specialties among Maryland providers

Maryland providers

Retina Specialist (Ophthalmology) Physician share within Maryland

1. Retina Specialist (Ophthalmology) Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Retina Specialist (Ophthalmology) Physician share within Maryland

Specialty board-certification context

Estimated specialty board-certified rate — Retina Specialist (Ophthalmology) Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Retina Specialist (Ophthalmology) Physician ABMS/AOA estimate

Est. board-certified rate (Retina Specialist (Ophthalmology) Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Retina Specialist (Ophthalmology) 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).

AYMAN ELNAHRY, MD, PHD is a Retina Specialist (Ophthalmology) Physician provider practicing in BETHESDA, Maryland, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: MD, PHD. NPI: 1003542101. 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.

AYMAN ELNAHRY, MD, PHD appears in the CMS NPPES registry as a Retina Specialist (Ophthalmology) Physician provider holding MD, PHD credentials at 9000 ROCKVILLE PIKE RM 10D45, BETHESDA, MD, 20892, with a listed phone of (301) 496-5248. NPI 1003542101 was issued on 07/29/2022. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what ELNAHRY 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 61 prescription claims written by this provider, covering 28 Medicare beneficiaries and totaling roughly $3K in drug spend, split 21% brand-name and 79% 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.

Retina Specialist (Ophthalmology) Physician is a narrow specialty nationwide, with 913 enrolled providers across 48 states and an average of 558 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

9000 ROCKVILLE PIKE RM 10D45
BETHESDA, MD 20892

Provider Details

NPI 1003542101
Specialty Retina Specialist (Ophthalmology) Physician
Credentials MD, PHD
Gender Male
NPI Issued 07/29/2022

Hospital and facility affiliations

Facilities where AYMAN ELNAHRY, MD, PHD 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.

BAYCARE CLINIC LLP
GREEN BAY, WI

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 AYMAN ELNAHRY, MD, PHD. Source: openpaymentsdata.cms.gov.

Total received

$771

Largest payer

Regeneron Healthcare Solutions, 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.

Brand vs generic prescribing mix · Typical

AYMAN ELNAHRY, MD, PHD — brand share 21.0%
Specialty average (est.)

21% brand-name claims vs 79% generic, on 61 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.

61
Total Claims
$3K
Total Drug Cost
28
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
83
Total Day Supply
1,981
Brand vs Generic
21% brand / 79% generic
Brand Drug Cost
$366
Generic Drug Cost
$3K

Patient Demographics

Average Patient Age
74.3 years
Avg HCC Risk Score
1.91
Gender Split
46% female / 54% male

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Neomycin-Polymyxin-Dexameth
Neomycin/Polymyxin B/Dexametha
31

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

Retina Specialist (Ophthalmology) Physician Overview

How AYMAN ELNAHRY, MD, PHD fits within the Retina Specialist (Ophthalmology) Physician landscape nationally.

913
Retina Specialist (Ophthalmology) Physician Providers in US
48
States with Retina Specialist (Ophthalmology) Physician
558
Avg Claims per Provider

AYMAN ELNAHRY, MD, PHD's 61 claims are below the specialty average of 558.

Nearby Retina Specialist (Ophthalmology) Physician Providers in Maryland

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

Compare Retina Specialist (Ophthalmology) Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is AYMAN ELNAHRY, MD, PHD's specialty?
AYMAN ELNAHRY, MD, PHD specializes in Retina Specialist (Ophthalmology) Physician and practices in BETHESDA, Maryland. Credentials: MD, PHD.
How much does AYMAN ELNAHRY, MD, PHD prescribe under Medicare Part D?
In 2023, AYMAN ELNAHRY, MD, PHD wrote 61 Medicare Part D claims totaling $3K in drug costs for 28 beneficiaries.
Where is AYMAN ELNAHRY, MD, PHD located?
AYMAN ELNAHRY, MD, PHD is located at 9000 ROCKVILLE PIKE RM 10D45, BETHESDA, MD, 20892. Phone: (301) 496-5248.
What is AYMAN ELNAHRY, MD, PHD's NPI number?
AYMAN ELNAHRY, MD, PHD's National Provider Identifier (NPI) is 1003542101, issued on 07/29/2022.
Does AYMAN ELNAHRY, MD, PHD prescribe more brand-name or generic drugs?
AYMAN ELNAHRY, MD, PHD's prescribing is 21% brand-name and 79% generic drugs by claim count, with $366 in brand drug costs.
How many Retina Specialist (Ophthalmology) Physician providers are there in the US?
There are 913 Retina Specialist (Ophthalmology) Physician providers across 48 states in the US. The average Retina Specialist (Ophthalmology) Physician provider writes 558 Medicare Part D claims per year.
What drugs does AYMAN ELNAHRY, MD, PHD prescribe most often?
Based on 2023 Medicare Part D data, AYMAN ELNAHRY, MD, PHD's most frequently prescribed drugs include Neomycin-Polymyxin-Dexameth. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does AYMAN ELNAHRY, MD, PHD accept Medicare?
AYMAN ELNAHRY, MD, PHD appears in CMS Medicare data with 61 Part D claims and 28 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify AYMAN ELNAHRY, MD, PHD's credentials?
AYMAN ELNAHRY, MD, PHD's NPI is 1003542101 with credentials MD, PHD. 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