2026 NPPES data Epilepsy Physician NPI 1548649700 M.D., PH.D.
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ISAAC NAGGAR, M.D., PH.D.

Epilepsy 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
314
Medicare Part D claims · 87 beneficiaries · Epilepsy Physician avg: 878
Generic prescribing
89%
generic claims · 11% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
86.7926/100
▲ 4 pts above national avg 83.1 · [object Object]
What the federal data reveals: ISAAC NAGGAR, M.D., PH.D. is a Epilepsy Physician ([object Object]) practicing in BETHESDA, Maryland with a Medicare Part D prescribing footprint of 314 claims across 87 beneficiaries — 11% brand-name prescribing . Their CMS MIPS Final Score of 86.7926/100 (national average: 83.1) reflects performance across Quality, Cost, Interoperability, and Improvement Activities .

What stands out: ISAAC NAGGAR, M.D., PH.D. reported a CMS MIPS final score of 86.7926 out of 100, above the 83.1 national average, and filed 314 Medicare Part D claims in 2023. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board certification likely (heuristic — not verified)

ISAAC NAGGAR, M.D., PH.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 3 hospital affiliations — signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).

ISAAC NAGGAR, M.D., PH.D. at a glance

High performer (top quartile)

NPI registry status

Active

Issued 05/21/2015

NPI 1548649700

Primary specialty

Epilepsy Physician

Rare

354 US NPIs in this specialty

Medicare Part D claims

314 64% vs specialty avg

2023 prescription claims

Specialty avg: 878

MIPS final score

86.7926/100 3.6925999999999988% pts

Above neutral band

vs 83.1 national avg

Specialty distribution in Maryland

How Epilepsy Physician compares to other specialties among Maryland providers

Maryland providers

Epilepsy Physician share within Maryland

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

Medicare quality performance — MIPS

ISAAC NAGGAR, M.D., PH.D.'s 2023 MIPS final score plotted against the Epilepsy Physician national average

High performer (top quartile)
MIPS Final Score
86.7926/100
vs 83.1 national avg · 2023 performance year

MIPS final score (Epilepsy Physician) — 86.7926/100 vs national avg 83.1

0%100%National avg83%86.8%
MIPS final score (Epilepsy Physician) — 86.7926/100 vs national avg 83.1

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).

ISAAC NAGGAR, M.D., PH.D. is a Epilepsy Physician provider practicing in BETHESDA, Maryland, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: M.D., PH.D.. NPI: 1548649700. 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.

ISAAC NAGGAR, M.D., PH.D. appears in the CMS NPPES registry as a Epilepsy Physician provider holding M.D., PH.D. credentials at 7315 WISCONSIN AVE, BETHESDA, MD, 20814, with a listed phone of (240) 235-9120. NPI 1548649700 was issued on 05/21/2015. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what NAGGAR 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 314 prescription claims written by this provider, covering 87 Medicare beneficiaries and totaling roughly $39K in drug spend, split 11% brand-name and 89% 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. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 86.7926/100 for the 2023 performance year (Quality 86.467, Cost 72.0084), compared with the national average of 83.1.

Epilepsy Physician is a narrow specialty nationwide, with 354 enrolled providers across 42 states and an average of 878 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

7315 WISCONSIN AVE
BETHESDA, MD 20814

Provider Details

NPI 1548649700
Specialty Epilepsy Physician
Credentials M.D., PH.D.
Gender Male
NPI Issued 05/21/2015

CMS Quality Score (MIPS)

Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.

86.7926
Final Score
Avg: 83.1
86.467
Quality
72.0084
Cost
97
Promoting Interoperability

Reporting: Group practice

Hospital and facility affiliations

Facilities where ISAAC NAGGAR, M.D., PH.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.

FREDERICK HEALTH HOSPITAL INC
FREDERICK, MD
JOHNS HOPKINS COMMUNITY PHYSICIANS, INC
LAUREL, MD
SUBURBAN/NRH MEDICAL REHABILITATION INC
BETHESDA, MD

Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).

Brand vs generic prescribing mix · Typical

ISAAC NAGGAR, M.D., PH.D. — brand share 11.0%
Specialty average (est.)

11% brand-name claims vs 89% generic, on 314 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.

314
Total Claims
$39K
Total Drug Cost
87
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
508
Total Day Supply
14,787
Brand vs Generic
11% brand / 89% generic
Brand Drug Cost
$31K
Generic Drug Cost
$9K

Patient Demographics

Average Patient Age
73.8 years
Avg HCC Risk Score
1.71
Gender Split
56% female / 44% male
Age Distribution
<65: 14, 65-74: 23, 75-84: 36, 85+: 14

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Levetiracetam
44
Gabapentin
40
Atorvastatin Calcium
23
Clopidogrel
Clopidogrel Bisulfate
18
Eliquis
Apixaban
17
Amlodipine Besylate
13
Lacosamide
11

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

Epilepsy Physician Overview

How ISAAC NAGGAR, M.D., PH.D. fits within the Epilepsy Physician landscape nationally.

354
Epilepsy Physician Providers in US
42
States with Epilepsy Physician
878
Avg Claims per Provider

ISAAC NAGGAR, M.D., PH.D.'s 314 claims are below the specialty average of 878.

Nearby Epilepsy Physician Providers in Maryland

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

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

Frequently Asked Questions

What is ISAAC NAGGAR, M.D., PH.D.'s specialty?
ISAAC NAGGAR, M.D., PH.D. specializes in Epilepsy Physician and practices in BETHESDA, Maryland. Credentials: M.D., PH.D..
How much does ISAAC NAGGAR, M.D., PH.D. prescribe under Medicare Part D?
In 2023, ISAAC NAGGAR, M.D., PH.D. wrote 314 Medicare Part D claims totaling $39K in drug costs for 87 beneficiaries.
What is ISAAC NAGGAR, M.D., PH.D.'s Medicare quality score?
ISAAC NAGGAR, M.D., PH.D. has a CMS MIPS Final Score of 86.7926/100 (Quality: 86.467, Cost: 72.0084). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is ISAAC NAGGAR, M.D., PH.D. located?
ISAAC NAGGAR, M.D., PH.D. is located at 7315 WISCONSIN AVE, BETHESDA, MD, 20814. Phone: (240) 235-9120.
What is ISAAC NAGGAR, M.D., PH.D.'s NPI number?
ISAAC NAGGAR, M.D., PH.D.'s National Provider Identifier (NPI) is 1548649700, issued on 05/21/2015.
Does ISAAC NAGGAR, M.D., PH.D. prescribe more brand-name or generic drugs?
ISAAC NAGGAR, M.D., PH.D.'s prescribing is 11% brand-name and 89% generic drugs by claim count, with $31K in brand drug costs.
How many Epilepsy Physician providers are there in the US?
There are 354 Epilepsy Physician providers across 42 states in the US. The average Epilepsy Physician provider writes 878 Medicare Part D claims per year.
What drugs does ISAAC NAGGAR, M.D., PH.D. prescribe most often?
Based on 2023 Medicare Part D data, ISAAC NAGGAR, M.D., PH.D.'s most frequently prescribed drugs include Levetiracetam, Gabapentin, Atorvastatin Calcium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does ISAAC NAGGAR, M.D., PH.D. accept Medicare?
ISAAC NAGGAR, M.D., PH.D. appears in CMS Medicare data with 314 Part D claims and 87 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify ISAAC NAGGAR, M.D., PH.D.'s credentials?
ISAAC NAGGAR, M.D., PH.D.'s NPI is 1548649700 with credentials M.D., PH.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.
Quality Performance
CMS Merit-based Incentive Payment System (MIPS) — 2023 performance year.
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