2026 NPPES data Internal Medicine Physician NPI 1487817821 MD, MS
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DIALA EL-MAOUCHE, MD, MS

Internal Medicine Physician in WASHINGTON, District of Columbia. 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
654
Medicare Part D claims · 110 beneficiaries · Internal Medicine Physician avg: 3K
Generic prescribing
51%
generic claims · 49% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$51.3K
109 payments · CMS Open Payments (Sunshine Act)
What the federal data reveals: DIALA EL-MAOUCHE, MD, MS is a Internal Medicine Physician ([object Object]) practicing in WASHINGTON, District of Columbia with a Medicare Part D prescribing footprint of 654 claims across 110 beneficiaries — 49% brand-name prescribing . Industry payments of $51.3K across 109 transactions are disclosed under CMS Open Payments (Sunshine Act).

What stands out: DIALA EL-MAOUCHE, MD, MS filed 654 Medicare Part D claims in 2023 across WASHINGTON, District of Columbia. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board certification likely (heuristic — not verified)

DIALA EL-MAOUCHE, MD, MS practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 2 hospital affiliations — signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).

DIALA EL-MAOUCHE, MD, MS at a glance

Quality data not reported

NPI registry status

Active

Issued 07/07/2008

NPI 1487817821

Primary specialty

Internal Medicine Physician

High-volume

172,858 US NPIs in this specialty

Medicare Part D claims

654 76% vs specialty avg

2023 prescription claims

Specialty avg: 2,716

Specialty distribution in District of Columbia

How Internal Medicine Physician compares to other specialties among District of Columbia providers

District of Columbia providers

Internal Medicine Physician share within District of Columbia

1. Internal Medicine Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Internal Medicine Physician share within District of Columbia

Specialty board-certification context

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

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

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

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

DIALA EL-MAOUCHE, MD, MS is a Internal Medicine Physician provider practicing in WASHINGTON, District of Columbia, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: MD, MS. NPI: 1487817821. 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.

DIALA EL-MAOUCHE, MD, MS appears in the CMS NPPES registry as a Internal Medicine Physician provider holding MD, MS credentials at 2300 M ST NW, WASHINGTON, DC, 20037, with a listed phone of (202) 741-3333. NPI 1487817821 was issued on 07/07/2008. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what EL-MAOUCHE 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 654 prescription claims written by this provider, covering 110 Medicare beneficiaries and totaling roughly $373K in drug spend, split 49% brand-name and 51% 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.

Internal Medicine Physician is a high-volume specialty nationwide, with 172,858 enrolled providers across 56 states and an average of 2,716 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

2300 M ST NW
WASHINGTON, DC 20037

Provider Details

NPI 1487817821
Specialty Internal Medicine Physician
Credentials MD, MS
Gender Female
NPI Issued 07/07/2008

Hospital and facility affiliations

Facilities where DIALA EL-MAOUCHE, MD, MS 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.

JOHNS HOPKINS COMMUNITY PHYSICIANS, INC
LAUREL, MD
MEDICAL FACULTY ASSOCIATES, INC
WASHINGTON, DC

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 DIALA EL-MAOUCHE, MD, MS. Source: openpaymentsdata.cms.gov.

Total received

$51.3K

Largest payer

Alexion Pharmaceuticals, Inc.

Most common payment type

Travel and Lodging

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 · Above average

DIALA EL-MAOUCHE, MD, MS — brand share 49.0%
Specialty average (est.)

49% brand-name claims vs 51% generic, on 654 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.

654
Total Claims
$373K
Total Drug Cost
110
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
1,453
Total Day Supply
43,161
Brand vs Generic
49% brand / 51% generic
Brand Drug Cost
$363K
Generic Drug Cost
$8K

Patient Demographics

Average Patient Age
68.3 years
Avg HCC Risk Score
1.49
Gender Split
72% female / 28% 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
Levothyroxine Sodium
84
Trulicity
Dulaglutide
54
Jardiance
Empagliflozin
40
Ozempic
Semaglutide
40
Alendronate Sodium
39
Metformin Hcl Er
Metformin Hcl
35
Synthroid
Levothyroxine Sodium
35
Atorvastatin Calcium
22
Hydrocortisone
22
Metformin Hcl
22

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

Internal Medicine Physician Overview

How DIALA EL-MAOUCHE, MD, MS fits within the Internal Medicine Physician landscape nationally.

172,858
Internal Medicine Physician Providers in US
56
States with Internal Medicine Physician
2,716
Avg Claims per Provider

DIALA EL-MAOUCHE, MD, MS's 654 claims are below the specialty average of 2,716.

Nearby Internal Medicine Physician Providers in District of Columbia

Other clinicians with the same primary specialty enrolled in District of Columbia, drawn from the same CMS NPPES roster as EL-MAOUCHE.

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

Frequently Asked Questions

What is DIALA EL-MAOUCHE, MD, MS's specialty?
DIALA EL-MAOUCHE, MD, MS specializes in Internal Medicine Physician and practices in WASHINGTON, District of Columbia. Credentials: MD, MS.
How much does DIALA EL-MAOUCHE, MD, MS prescribe under Medicare Part D?
In 2023, DIALA EL-MAOUCHE, MD, MS wrote 654 Medicare Part D claims totaling $373K in drug costs for 110 beneficiaries.
Where is DIALA EL-MAOUCHE, MD, MS located?
DIALA EL-MAOUCHE, MD, MS is located at 2300 M ST NW, WASHINGTON, DC, 20037. Phone: (202) 741-3333.
What is DIALA EL-MAOUCHE, MD, MS's NPI number?
DIALA EL-MAOUCHE, MD, MS's National Provider Identifier (NPI) is 1487817821, issued on 07/07/2008.
Does DIALA EL-MAOUCHE, MD, MS prescribe more brand-name or generic drugs?
DIALA EL-MAOUCHE, MD, MS's prescribing is 49% brand-name and 51% generic drugs by claim count, with $363K in brand drug costs.
How many Internal Medicine Physician providers are there in the US?
There are 172,858 Internal Medicine Physician providers across 56 states in the US. The average Internal Medicine Physician provider writes 2,716 Medicare Part D claims per year.
What drugs does DIALA EL-MAOUCHE, MD, MS prescribe most often?
Based on 2023 Medicare Part D data, DIALA EL-MAOUCHE, MD, MS's most frequently prescribed drugs include Levothyroxine Sodium, Trulicity, Jardiance. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does DIALA EL-MAOUCHE, MD, MS accept Medicare?
DIALA EL-MAOUCHE, MD, MS appears in CMS Medicare data with 654 Part D claims and 110 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify DIALA EL-MAOUCHE, MD, MS's credentials?
DIALA EL-MAOUCHE, MD, MS's NPI is 1487817821 with credentials MD, MS. 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