2026 NPPES data Geriatric Medicine (Internal Medicine) Physician NPI 1861536963 MD
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ELIAS MOUNAYAR, MD

Geriatric Medicine (Internal Medicine) Physician in MARKSVILLE, Louisiana. 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
9K
Medicare Part D claims · 398 beneficiaries · Geriatric Medicine (Internal Medicine) Physician avg: 4K
Generic prescribing
89%
generic claims · 11% brand-name · higher generic rates reduce patient out-of-pocket costs
What the federal data reveals: ELIAS MOUNAYAR, MD is a Geriatric Medicine (Internal Medicine) Physician ([object Object]) practicing in MARKSVILLE, Louisiana with a Medicare Part D prescribing footprint of 9K claims across 398 beneficiaries — 11% brand-name prescribing .

What stands out: ELIAS MOUNAYAR, MD filed 8,823 Medicare Part D claims in 2023 across MARKSVILLE, Louisiana. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board-eligible specialty (heuristic — not verified)

ELIAS MOUNAYAR, 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).

ELIAS MOUNAYAR, MD at a glance

Quality data not reported

NPI registry status

Active

Issued 02/20/2007

NPI 1861536963

Primary specialty

Geriatric Medicine (Internal Medicine) Physician

Niche

4,161 US NPIs in this specialty

Medicare Part D claims

8,823 98% vs specialty avg

2023 prescription claims

Specialty avg: 4,450

Specialty distribution in Louisiana

How Geriatric Medicine (Internal Medicine) Physician compares to other specialties among Louisiana providers

Louisiana providers

Geriatric Medicine (Internal Medicine) Physician share within Louisiana

1. Geriatric Medicine (Internal Medicine) Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Geriatric Medicine (Internal Medicine) Physician share within Louisiana

Specialty board-certification context

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

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

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

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

ELIAS MOUNAYAR, MD is a Geriatric Medicine (Internal Medicine) Physician provider practicing in MARKSVILLE, Louisiana, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: MD. NPI: 1861536963. 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.

ELIAS MOUNAYAR, MD appears in the CMS NPPES registry as a Geriatric Medicine (Internal Medicine) Physician provider holding MD credentials at 338 MOREAU ST, MARKSVILLE, LA, 71351, with a listed phone of (318) 253-5600. NPI 1861536963 was issued on 02/20/2007. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what MOUNAYAR 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 8,823 prescription claims written by this provider, covering 398 Medicare beneficiaries and totaling roughly $640K in drug spend, split 11% brand-name and 89% generic by claim count, with an opioid prescribing rate of 3.5%. 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.

Geriatric Medicine (Internal Medicine) Physician is a narrow specialty nationwide, with 4,161 enrolled providers across 52 states and an average of 4,450 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

338 MOREAU ST
MARKSVILLE, LA 71351

Provider Details

NPI 1861536963
Specialty Geriatric Medicine (Internal Medicine) Physician
Credentials MD
Gender Male
NPI Issued 02/20/2007

Brand vs generic prescribing mix · Typical

ELIAS MOUNAYAR, MD — brand share 11.0%
Specialty average (est.)

11% brand-name claims vs 89% generic, on 8,823 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.

8,823
Total Claims
$640K
Total Drug Cost
398
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
17,705
Total Day Supply
515,538
Brand vs Generic
11% brand / 89% generic
Brand Drug Cost
$528K
Generic Drug Cost
$111K
Opioid Claims
310 (3.5% rate)
Antibiotic Claims
203

Patient Demographics

Average Patient Age
73.2 years
Avg HCC Risk Score
0.95
Gender Split
59% female / 41% male
Age Distribution
<65: 44, 65-74: 182, 75-84: 135, 85+: 37

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Amlodipine Besylate
409
Levothyroxine Sodium
359
Alprazolam
320
Pantoprazole Sodium
285
Atorvastatin Calcium
282
Hydrochlorothiazide
258
Alendronate Sodium
248
Pravastatin Sodium
213
Losartan Potassium
182
Allopurinol
172

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

Geriatric Medicine (Internal Medicine) Physician Overview

How ELIAS MOUNAYAR, MD fits within the Geriatric Medicine (Internal Medicine) Physician landscape nationally.

4,161
Geriatric Medicine (Internal Medicine) Physician Providers in US
52
States with Geriatric Medicine (Internal Medicine) Physician
4,450
Avg Claims per Provider

ELIAS MOUNAYAR, MD's 8,823 claims are above the specialty average of 4,450.

Nearby Geriatric Medicine (Internal Medicine) Physician Providers in Louisiana

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

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

Frequently Asked Questions

What is ELIAS MOUNAYAR, MD's specialty?
ELIAS MOUNAYAR, MD specializes in Geriatric Medicine (Internal Medicine) Physician and practices in MARKSVILLE, Louisiana. Credentials: MD.
How much does ELIAS MOUNAYAR, MD prescribe under Medicare Part D?
In 2023, ELIAS MOUNAYAR, MD wrote 8,823 Medicare Part D claims totaling $640K in drug costs for 398 beneficiaries.
Where is ELIAS MOUNAYAR, MD located?
ELIAS MOUNAYAR, MD is located at 338 MOREAU ST, MARKSVILLE, LA, 71351. Phone: (318) 253-5600.
What is ELIAS MOUNAYAR, MD's NPI number?
ELIAS MOUNAYAR, MD's National Provider Identifier (NPI) is 1861536963, issued on 02/20/2007.
Does ELIAS MOUNAYAR, MD prescribe more brand-name or generic drugs?
ELIAS MOUNAYAR, MD's prescribing is 11% brand-name and 89% generic drugs by claim count, with $528K in brand drug costs.
Does ELIAS MOUNAYAR, MD prescribe opioids?
Yes, ELIAS MOUNAYAR, MD had 310 opioid claims in 2023 with an opioid prescribing rate of 3.5%.
How many Geriatric Medicine (Internal Medicine) Physician providers are there in the US?
There are 4,161 Geriatric Medicine (Internal Medicine) Physician providers across 52 states in the US. The average Geriatric Medicine (Internal Medicine) Physician provider writes 4,450 Medicare Part D claims per year.
What drugs does ELIAS MOUNAYAR, MD prescribe most often?
Based on 2023 Medicare Part D data, ELIAS MOUNAYAR, MD's most frequently prescribed drugs include Amlodipine Besylate, Levothyroxine Sodium, Alprazolam. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does ELIAS MOUNAYAR, MD accept Medicare?
ELIAS MOUNAYAR, MD appears in CMS Medicare data with 8,823 Part D claims and 398 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify ELIAS MOUNAYAR, MD's credentials?
ELIAS MOUNAYAR, MD's NPI is 1861536963 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