2026 NPPES data Emergency Medicine Physician NPI 1356628721 DO
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PAULA DIAZ, DO

Emergency Medicine Physician in NEWARK, Delaware. 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
79
Medicare Part D claims · 62 beneficiaries · Emergency Medicine Physician avg: 352
What the federal data reveals: PAULA DIAZ, DO is a Emergency Medicine Physician ([object Object]) practicing in NEWARK, Delaware with a Medicare Part D prescribing footprint of 79 claims across 62 beneficiaries .

What stands out: PAULA DIAZ, DO filed 79 Medicare Part D claims in 2023 across NEWARK, Delaware. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board-eligible specialty (heuristic — not verified)

PAULA DIAZ, DO 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).

PAULA DIAZ, DO at a glance

Quality data not reported

NPI registry status

Active

Issued 11/13/2011

NPI 1356628721

Primary specialty

Emergency Medicine Physician

High-volume

64,398 US NPIs in this specialty

Medicare Part D claims

79 78% vs specialty avg

2023 prescription claims

Specialty avg: 352

Specialty distribution in Delaware

How Emergency Medicine Physician compares to other specialties among Delaware providers

Delaware providers

Emergency Medicine Physician share within Delaware

1. Emergency Medicine Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Emergency Medicine Physician share within Delaware

Specialty board-certification context

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

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

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

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

PAULA DIAZ, DO is a Emergency Medicine Physician provider practicing in NEWARK, Delaware, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: DO. NPI: 1356628721. 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.

PAULA DIAZ, DO appears in the CMS NPPES registry as a Emergency Medicine Physician provider holding DO credentials at 4755 OGLETOWN STANTON RD, NEWARK, DE, 19718, with a listed phone of (302) 733-3901. NPI 1356628721 was issued on 11/13/2011. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what DIAZ 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 79 prescription claims written by this provider, covering 62 Medicare beneficiaries and totaling roughly $888 in drug spend, with an opioid prescribing rate of 16.5%. 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.

Emergency Medicine Physician is a high-volume specialty nationwide, with 64,398 enrolled providers across 56 states and an average of 352 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

4755 OGLETOWN STANTON RD
NEWARK, DE 19718

Provider Details

NPI 1356628721
Specialty Emergency Medicine Physician
Credentials DO
Gender Female
NPI Issued 11/13/2011

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2023.

79
Total Claims
$888
Total Drug Cost
62
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
79
Total Day Supply
539
Generic Drug Cost
$618
Opioid Claims
13 (16.5% rate)
Antibiotic Claims
26

Patient Demographics

Average Patient Age
69.5 years
Avg HCC Risk Score
1.77
Gender Split
63% female / 37% 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
Cephalexin
11
Prednisone
11

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

Emergency Medicine Physician Overview

How PAULA DIAZ, DO fits within the Emergency Medicine Physician landscape nationally.

64,398
Emergency Medicine Physician Providers in US
56
States with Emergency Medicine Physician
352
Avg Claims per Provider

PAULA DIAZ, DO's 79 claims are below the specialty average of 352.

Nearby Emergency Medicine Physician Providers in Delaware

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

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

Frequently Asked Questions

What is PAULA DIAZ, DO's specialty?
PAULA DIAZ, DO specializes in Emergency Medicine Physician and practices in NEWARK, Delaware. Credentials: DO.
How much does PAULA DIAZ, DO prescribe under Medicare Part D?
In 2023, PAULA DIAZ, DO wrote 79 Medicare Part D claims totaling $888 in drug costs for 62 beneficiaries.
Where is PAULA DIAZ, DO located?
PAULA DIAZ, DO is located at 4755 OGLETOWN STANTON RD, NEWARK, DE, 19718. Phone: (302) 733-3901.
What is PAULA DIAZ, DO's NPI number?
PAULA DIAZ, DO's National Provider Identifier (NPI) is 1356628721, issued on 11/13/2011.
Does PAULA DIAZ, DO prescribe opioids?
Yes, PAULA DIAZ, DO had 13 opioid claims in 2023 with an opioid prescribing rate of 16.5%.
How many Emergency Medicine Physician providers are there in the US?
There are 64,398 Emergency Medicine Physician providers across 56 states in the US. The average Emergency Medicine Physician provider writes 352 Medicare Part D claims per year.
What drugs does PAULA DIAZ, DO prescribe most often?
Based on 2023 Medicare Part D data, PAULA DIAZ, DO's most frequently prescribed drugs include Cephalexin, Prednisone. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does PAULA DIAZ, DO accept Medicare?
PAULA DIAZ, DO appears in CMS Medicare data with 79 Part D claims and 62 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify PAULA DIAZ, DO's credentials?
PAULA DIAZ, DO's NPI is 1356628721 with credentials DO. 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