2026 NPPES data Gastroenterology Physician NPI 1487681136 M.D.
Verify on CMS →

MICHAEL BUTENSKY, M.D.

Gastroenterology Physician in HARTFORD, 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
2K
Medicare Part D claims · 591 beneficiaries · Gastroenterology Physician avg: 833
Generic prescribing
76%
generic claims · 24% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$1.1K
40 payments · CMS Open Payments (Sunshine Act)
What the federal data reveals: MICHAEL BUTENSKY, M.D. is a Gastroenterology Physician ([object Object]) practicing in HARTFORD, Connecticut with a Medicare Part D prescribing footprint of 2K claims across 591 beneficiaries — 24% brand-name prescribing . Industry payments of $1.1K across 40 transactions are disclosed under CMS Open Payments (Sunshine Act).

What stands out: MICHAEL BUTENSKY, M.D. filed 1,795 Medicare Part D claims in 2023 across HARTFORD, Connecticut. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board certification likely (heuristic — not verified)

MICHAEL BUTENSKY, 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).

MICHAEL BUTENSKY, M.D. at a glance

Quality data not reported

NPI registry status

Active

Issued 06/27/2006

NPI 1487681136

Primary specialty

Gastroenterology Physician

Mid-sized

16,567 US NPIs in this specialty

Medicare Part D claims

1,795 115% vs specialty avg

2023 prescription claims

Specialty avg: 833

Specialty distribution in Connecticut

How Gastroenterology Physician compares to other specialties among Connecticut providers

Connecticut providers

Gastroenterology Physician share within Connecticut

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

Specialty board-certification context

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

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

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

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

MICHAEL BUTENSKY, M.D. is a Gastroenterology Physician provider practicing in HARTFORD, Connecticut, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: M.D.. NPI: 1487681136. 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.

MICHAEL BUTENSKY, M.D. appears in the CMS NPPES registry as a Gastroenterology Physician provider holding M.D. credentials at 1000 ASYLUM AVE, HARTFORD, CT, 06105, with a listed phone of (860) 522-1171. NPI 1487681136 was issued on 06/27/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what BUTENSKY 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 1,795 prescription claims written by this provider, covering 591 Medicare beneficiaries and totaling roughly $429K in drug spend, split 24% brand-name and 76% 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.

Gastroenterology Physician is a mid-sized specialty nationwide, with 16,567 enrolled providers across 54 states and an average of 833 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

1000 ASYLUM AVE
HARTFORD, CT 06105

Provider Details

NPI 1487681136
Specialty Gastroenterology Physician
Credentials M.D.
Gender Male
NPI Issued 06/27/2006

Hospital and facility affiliations

Facilities where MICHAEL BUTENSKY, 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.

CONNECTICUT GASTROENTEROLOGY ASSOC PC
HARTFORD, CT
CONNECTICUT GI PLLC
HARTFORD, 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 MICHAEL BUTENSKY, M.D.. Source: openpaymentsdata.cms.gov.

Total received

$1.1K

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 · Typical

MICHAEL BUTENSKY, M.D. — brand share 24.0%
Specialty average (est.)

24% brand-name claims vs 76% generic, on 1,795 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.

1,795
Total Claims
$429K
Total Drug Cost
591
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
3,848
Total Day Supply
105,234
Brand vs Generic
24% brand / 76% generic
Brand Drug Cost
$254K
Generic Drug Cost
$175K
Antibiotic Claims
37

Patient Demographics

Average Patient Age
72.3 years
Avg HCC Risk Score
1.10
Gender Split
48% female / 52% male
Age Distribution
<65: 39, 65-74: 328, 75-84: 192, 85+: 32

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Pantoprazole Sodium
365
Famotidine
312
Clenpiq
Sod Picosulf/Mag Ox/Citric Ac
187
Omeprazole
166
Lubiprostone
60
Esomeprazole Magnesium
48
Linzess
Linaclotide
45
Dexlansoprazole Dr
Dexlansoprazole
41
Mesalamine
36
Lansoprazole
33

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

Gastroenterology Physician Overview

How MICHAEL BUTENSKY, M.D. fits within the Gastroenterology Physician landscape nationally.

16,567
Gastroenterology Physician Providers in US
54
States with Gastroenterology Physician
833
Avg Claims per Provider

MICHAEL BUTENSKY, M.D.'s 1,795 claims are above the specialty average of 833.

Nearby Gastroenterology Physician Providers in Connecticut

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

Compare Gastroenterology Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is MICHAEL BUTENSKY, M.D.'s specialty?
MICHAEL BUTENSKY, M.D. specializes in Gastroenterology Physician and practices in HARTFORD, Connecticut. Credentials: M.D..
How much does MICHAEL BUTENSKY, M.D. prescribe under Medicare Part D?
In 2023, MICHAEL BUTENSKY, M.D. wrote 1,795 Medicare Part D claims totaling $429K in drug costs for 591 beneficiaries.
Where is MICHAEL BUTENSKY, M.D. located?
MICHAEL BUTENSKY, M.D. is located at 1000 ASYLUM AVE, HARTFORD, CT, 06105. Phone: (860) 522-1171.
What is MICHAEL BUTENSKY, M.D.'s NPI number?
MICHAEL BUTENSKY, M.D.'s National Provider Identifier (NPI) is 1487681136, issued on 06/27/2006.
Does MICHAEL BUTENSKY, M.D. prescribe more brand-name or generic drugs?
MICHAEL BUTENSKY, M.D.'s prescribing is 24% brand-name and 76% generic drugs by claim count, with $254K in brand drug costs.
How many Gastroenterology Physician providers are there in the US?
There are 16,567 Gastroenterology Physician providers across 54 states in the US. The average Gastroenterology Physician provider writes 833 Medicare Part D claims per year.
What drugs does MICHAEL BUTENSKY, M.D. prescribe most often?
Based on 2023 Medicare Part D data, MICHAEL BUTENSKY, M.D.'s most frequently prescribed drugs include Pantoprazole Sodium, Famotidine, Clenpiq. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does MICHAEL BUTENSKY, M.D. accept Medicare?
MICHAEL BUTENSKY, M.D. appears in CMS Medicare data with 1,795 Part D claims and 591 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify MICHAEL BUTENSKY, M.D.'s credentials?
MICHAEL BUTENSKY, M.D.'s NPI is 1487681136 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