2026 NPPES data Ophthalmology Physician NPI 1689610321 MD
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ROBERT FELDMAN, MD

Ophthalmology Physician in ROCKVILLE, 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
57
Medicare Part D claims · 12 beneficiaries · Ophthalmology Physician avg: 1K
Generic prescribing
35%
generic claims · 65% brand-name · higher generic rates reduce patient out-of-pocket costs
What the federal data reveals: ROBERT FELDMAN, MD is a Ophthalmology Physician ([object Object]) practicing in ROCKVILLE, Maryland with a Medicare Part D prescribing footprint of 57 claims across 12 beneficiaries — 65% brand-name prescribing .

What stands out: ROBERT FELDMAN, MD filed 57 Medicare Part D claims in 2023 across ROCKVILLE, Maryland. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board-eligible specialty (heuristic — not verified)

ROBERT FELDMAN, MD practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).

ROBERT FELDMAN, MD at a glance

Quality data not reported

NPI registry status

Active

Issued 06/21/2006

NPI 1689610321

Primary specialty

Ophthalmology Physician

Mid-sized

22,090 US NPIs in this specialty

Medicare Part D claims

57 96% vs specialty avg

2023 prescription claims

Specialty avg: 1,420

Specialty distribution in Maryland

How Ophthalmology Physician compares to other specialties among Maryland providers

Maryland providers

Ophthalmology Physician share within Maryland

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

Specialty board-certification context

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

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

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

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

ROBERT FELDMAN, MD is a Ophthalmology Physician provider practicing in ROCKVILLE, Maryland, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: MD. NPI: 1689610321. 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.

ROBERT FELDMAN, MD appears in the CMS NPPES registry as a Ophthalmology Physician provider holding MD credentials at 15005 SHADY GROVE RD., ROCKVILLE, MD, 20850, with a listed phone of (301) 279-9696. NPI 1689610321 was issued on 06/21/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what FELDMAN 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 57 prescription claims written by this provider, covering 12 Medicare beneficiaries and totaling roughly $26K in drug spend, split 65% brand-name and 35% 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.

Ophthalmology Physician is a mid-sized specialty nationwide, with 22,090 enrolled providers across 56 states and an average of 1,420 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

15005 SHADY GROVE RD.
ROCKVILLE, MD 20850

Provider Details

NPI 1689610321
Specialty Ophthalmology Physician
Credentials MD
Gender Male
NPI Issued 06/21/2006

Brand vs generic prescribing mix · Brand-heavy

ROBERT FELDMAN, MD — brand share 65.0%
Specialty average (est.)

65% brand-name claims vs 35% generic, on 57 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.

57
Total Claims
$26K
Total Drug Cost
12
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
71
Total Day Supply
2,062
Brand vs Generic
65% brand / 35% generic
Brand Drug Cost
$25K
Generic Drug Cost
$321

Patient Demographics

Average Patient Age
83.4 years
Avg HCC Risk Score
1.29
Age Distribution
<65: 0, 65-74: N/A, 75-84: N/A, 85+: N/A

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Restasis
Cyclosporine
31

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

Ophthalmology Physician Overview

How ROBERT FELDMAN, MD fits within the Ophthalmology Physician landscape nationally.

22,090
Ophthalmology Physician Providers in US
56
States with Ophthalmology Physician
1,420
Avg Claims per Provider

ROBERT FELDMAN, MD's 57 claims are below the specialty average of 1,420.

Nearby Ophthalmology Physician Providers in Maryland

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

Compare Ophthalmology Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is ROBERT FELDMAN, MD's specialty?
ROBERT FELDMAN, MD specializes in Ophthalmology Physician and practices in ROCKVILLE, Maryland. Credentials: MD.
How much does ROBERT FELDMAN, MD prescribe under Medicare Part D?
In 2023, ROBERT FELDMAN, MD wrote 57 Medicare Part D claims totaling $26K in drug costs for 12 beneficiaries.
Where is ROBERT FELDMAN, MD located?
ROBERT FELDMAN, MD is located at 15005 SHADY GROVE RD., ROCKVILLE, MD, 20850. Phone: (301) 279-9696.
What is ROBERT FELDMAN, MD's NPI number?
ROBERT FELDMAN, MD's National Provider Identifier (NPI) is 1689610321, issued on 06/21/2006.
Does ROBERT FELDMAN, MD prescribe more brand-name or generic drugs?
ROBERT FELDMAN, MD's prescribing is 65% brand-name and 35% generic drugs by claim count, with $25K in brand drug costs.
How many Ophthalmology Physician providers are there in the US?
There are 22,090 Ophthalmology Physician providers across 56 states in the US. The average Ophthalmology Physician provider writes 1,420 Medicare Part D claims per year.
What drugs does ROBERT FELDMAN, MD prescribe most often?
Based on 2023 Medicare Part D data, ROBERT FELDMAN, MD's most frequently prescribed drugs include Restasis. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does ROBERT FELDMAN, MD accept Medicare?
ROBERT FELDMAN, MD appears in CMS Medicare data with 57 Part D claims and 12 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify ROBERT FELDMAN, MD's credentials?
ROBERT FELDMAN, MD's NPI is 1689610321 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