2026 NPPES data Internal Medicine Physician NPI 1679592984 M.D.
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STEVEN FISHER, M.D.

Internal Medicine Physician in TRUMBULL, 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
6K
Medicare Part D claims · 622 beneficiaries · Internal Medicine Physician avg: 3K
Generic prescribing
91%
generic claims · 9% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$275.37
12 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

STEVEN FISHER, M.D. filed 6,058 Medicare Part D claims in 2023 as a Internal Medicine Physician in TRUMBULL, Connecticut, prescribing 91% generic.

6K
Part D claims, 2023
91%
generic prescribing
Likely
board-certified (heuristic)

Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) — no proprietary rating or editorial opinion is applied.

STEVEN FISHER, M.D.'s Medicare Part D volume vs every U.S. prescriber

Total Medicare Part D claims, 2023 — across all CMS prescribers nationally

6,058 Top 5% higher than 95% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). Below this entry. 400–600: 90,619 prescribers (7%). Below this entry. 600–800: 56,224 prescribers (4%). Below this entry. 800–1,000: 40,919 prescribers (3%). Below this entry. 1,000–1,200: 31,827 prescribers (2%). Below this entry. 1,200–1,400: 26,224 prescribers (2%). Below this entry. 1,400–1,600: 21,710 prescribers (2%). Below this entry. 1,600–1,800: 19,072 prescribers (1%). Below this entry. 1,800–2,000: 16,451 prescribers (1%). Below this entry. 2,000–2,200: 213,991 prescribers (16%). This entry sits in this band. This provider 0 2K+ every Part D prescriber (claims/yr), bucketed by value

Each bar is a band; taller bars hold more prescribers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source CMS Medicare Part D Prescriber Public Use File · 2023

Board certification likely (heuristic — not verified)

STEVEN FISHER, M.D. 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).

What does the federal data show about STEVEN FISHER, M.D.?

Quality data not reported

NPI registry status

Active

Issued 07/18/2006

NPI 1679592984

Primary specialty

Internal Medicine Physician

High-volume

172,858 US NPIs in this specialty

Medicare Part D claims

6,058 123% vs specialty avg

2023 prescription claims

Specialty avg: 2,716

Specialty distribution in Connecticut

How Internal Medicine Physician compares to other specialties among Connecticut providers

Connecticut providers

Internal Medicine Physician share within Connecticut

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

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).

STEVEN FISHER, M.D. appears in the CMS NPPES registry as a Internal Medicine Physician provider holding M.D. credentials at 15 CORPORATE DR, TRUMBULL, CT, 06611, with a listed phone of (203) 452-2446. NPI 1679592984 was issued on 07/18/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what FISHER 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 6,058 prescription claims written by this provider, covering 622 Medicare beneficiaries and totaling roughly $417K in drug spend, split 9% brand-name and 91% generic by claim count, with an opioid prescribing rate of 1.5%. 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.

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

15 CORPORATE DR
TRUMBULL, CT 06611

Provider Details

NPI 1679592984
Specialty Internal Medicine Physician
Credentials M.D.
Gender Male
NPI Issued 07/18/2006

Hospital and facility affiliations

Facilities where STEVEN FISHER, M.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.

HARTFORD HEALTHCARE MEDICAL GROUP SPECIALISTS PLLC
STORRS, CT
REHABILITATION ASSOCIATES INC
FAIRFIELD, CT

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 STEVEN FISHER, M.D.. Source: openpaymentsdata.cms.gov.

Total received

$275

Largest payer

ABBVIE INC.

Most common payment type

Food and Beverage

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 · Generic-heavy

STEVEN FISHER, M.D. — brand share 9.0%
Specialty average (est.)

9% brand-name claims vs 91% generic, on 6,058 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.

6,058
Total Claims
$417K
Total Drug Cost
622
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
14,758
Total Day Supply
436,583
Brand vs Generic
9% brand / 91% generic
Brand Drug Cost
$286K
Generic Drug Cost
$129K
Opioid Claims
91 (1.5% rate)
Antibiotic Claims
107

Patient Demographics

Average Patient Age
74.4 years
Avg HCC Risk Score
0.78
Gender Split
55% female / 45% male
Age Distribution
<65: 11, 65-74: 346, 75-84: 192, 85+: 73

Top Prescribed Drugs (Medicare Part D)

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

What STEVEN FISHER, M.D. prescribes most

Top Medicare Part D drugs by claim count, 2023

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2023
Drug Claims
Levothyroxine Sodium
511
Pravastatin Sodium
360
Rosuvastatin Calcium
344
Amlodipine Besylate
334
Losartan Potassium
190
Lisinopril
159
Pantoprazole Sodium
138
Irbesartan
133
Atorvastatin Calcium
132
Alprazolam
122

* 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 STEVEN FISHER, M.D. 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

STEVEN FISHER, M.D.'s 6,058 claims are above the specialty average of 2,716.

Nearby Internal Medicine Physician Providers in Connecticut

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

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

Frequently Asked Questions

What is STEVEN FISHER, M.D.'s specialty?
STEVEN FISHER, M.D. specializes in Internal Medicine Physician and practices in TRUMBULL, Connecticut. Credentials: M.D..
How much does STEVEN FISHER, M.D. prescribe under Medicare Part D?
In 2023, STEVEN FISHER, M.D. wrote 6,058 Medicare Part D claims totaling $417K in drug costs for 622 beneficiaries.
Where is STEVEN FISHER, M.D. located?
STEVEN FISHER, M.D. is located at 15 CORPORATE DR, TRUMBULL, CT, 06611. Phone: (203) 452-2446.
What is STEVEN FISHER, M.D.'s NPI number?
STEVEN FISHER, M.D.'s National Provider Identifier (NPI) is 1679592984, issued on 07/18/2006.
Does STEVEN FISHER, M.D. prescribe more brand-name or generic drugs?
STEVEN FISHER, M.D.'s prescribing is 9% brand-name and 91% generic drugs by claim count, with $286K in brand drug costs.
Does STEVEN FISHER, M.D. prescribe opioids?
Yes, STEVEN FISHER, M.D. had 91 opioid claims in 2023 with an opioid prescribing rate of 1.5%.
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 STEVEN FISHER, M.D. prescribe most often?
Based on 2023 Medicare Part D data, STEVEN FISHER, M.D.'s most frequently prescribed drugs include Levothyroxine Sodium, Pravastatin Sodium, Rosuvastatin Calcium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does STEVEN FISHER, M.D. accept Medicare?
STEVEN FISHER, M.D. appears in CMS Medicare data with 6,058 Part D claims and 622 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify STEVEN FISHER, M.D.'s credentials?
STEVEN FISHER, M.D.'s NPI is 1679592984 with credentials M.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.
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