2026 NPPES data Emergency Medicine Physician NPI 1558386292 DO
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GREGORY BORIS, DO

Emergency Medicine Physician in DERBY, Connecticut. 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
85
Medicare Part D claims · 25 beneficiaries · Emergency Medicine Physician avg: 352
What the federal data reveals: GREGORY BORIS, DO is a Emergency Medicine Physician ([object Object]) practicing in DERBY, Connecticut with a Medicare Part D prescribing footprint of 85 claims across 25 beneficiaries .

What stands out: GREGORY BORIS, DO filed 85 Medicare Part D claims in 2023 across DERBY, Connecticut. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board-eligible specialty (heuristic — not verified)

GREGORY BORIS, 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).

GREGORY BORIS, DO at a glance

Quality data not reported

NPI registry status

Active

Issued 07/13/2006

NPI 1558386292

Primary specialty

Emergency Medicine Physician

High-volume

64,398 US NPIs in this specialty

Medicare Part D claims

85 76% vs specialty avg

2023 prescription claims

Specialty avg: 352

Specialty distribution in Connecticut

How Emergency Medicine Physician compares to other specialties among Connecticut providers

Connecticut providers

Emergency Medicine Physician share within Connecticut

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

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).

GREGORY BORIS, DO is a Emergency Medicine Physician provider practicing in DERBY, Connecticut, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: DO. NPI: 1558386292. 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.

GREGORY BORIS, DO appears in the CMS NPPES registry as a Emergency Medicine Physician provider holding DO credentials at 130 DIVISION ST, DERBY, CT, 06418, with a listed phone of (203) 732-7403. NPI 1558386292 was issued on 07/13/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what BORIS 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 85 prescription claims written by this provider, covering 25 Medicare beneficiaries and totaling roughly $12K in drug spend. 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

130 DIVISION ST
DERBY, CT 06418

Provider Details

NPI 1558386292
Specialty Emergency Medicine Physician
Credentials DO
Gender Male
NPI Issued 07/13/2006

Medicare Part D Prescribing Data

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

85
Total Claims
$12K
Total Drug Cost
25
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
99
Total Day Supply
2,516
Generic Drug Cost
$1K

Patient Demographics

Average Patient Age
63.2 years
Avg HCC Risk Score
1.16
Gender Split
48% female / 52% male

Emergency Medicine Physician Overview

How GREGORY BORIS, 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

GREGORY BORIS, DO's 85 claims are below the specialty average of 352.

Nearby Emergency Medicine Physician Providers in Connecticut

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

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

Frequently Asked Questions

What is GREGORY BORIS, DO's specialty?
GREGORY BORIS, DO specializes in Emergency Medicine Physician and practices in DERBY, Connecticut. Credentials: DO.
How much does GREGORY BORIS, DO prescribe under Medicare Part D?
In 2023, GREGORY BORIS, DO wrote 85 Medicare Part D claims totaling $12K in drug costs for 25 beneficiaries.
Where is GREGORY BORIS, DO located?
GREGORY BORIS, DO is located at 130 DIVISION ST, DERBY, CT, 06418. Phone: (203) 732-7403.
What is GREGORY BORIS, DO's NPI number?
GREGORY BORIS, DO's National Provider Identifier (NPI) is 1558386292, issued on 07/13/2006.
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.
Does GREGORY BORIS, DO accept Medicare?
GREGORY BORIS, DO appears in CMS Medicare data with 85 Part D claims and 25 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify GREGORY BORIS, DO's credentials?
GREGORY BORIS, DO's NPI is 1558386292 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