2026 NPPES data Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician NPI 1609889757 MD
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KEVIN GREER, MD

Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician in GREEN BAY, Wisconsin. 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
91
Medicare Part D claims · 75 beneficiaries · Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician avg: 128
Industry payments
$217.21
3 payments · CMS Open Payments (Sunshine Act)
What the federal data reveals: KEVIN GREER, MD is a Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician ([object Object]) practicing in GREEN BAY, Wisconsin with a Medicare Part D prescribing footprint of 91 claims across 75 beneficiaries . Industry payments of $217.21 across 3 transactions are disclosed under CMS Open Payments (Sunshine Act).

What the federal data shows

KEVIN GREER, MD filed 91 Medicare Part D claims in 2023 as a Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician in GREEN BAY, Wisconsin.

91
Part D claims, 2023
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.

Board certification likely (heuristic — not verified)

KEVIN GREER, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 1 hospital affiliation — signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).

KEVIN GREER, MD at a glance

Quality data not reported

NPI registry status

Active

Issued 08/13/2006

NPI 1609889757

Primary specialty

Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician

Mid-sized

5,062 US NPIs in this specialty

Medicare Part D claims

91 29% vs specialty avg

2023 prescription claims

Specialty avg: 128

Specialty distribution in Wisconsin

How Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician compares to other specialties among Wisconsin providers

Wisconsin providers

Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician share within Wisconsin

1. Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician share within Wisconsin

Specialty board-certification context

Estimated specialty board-certified rate — Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician ABMS/AOA estimate

Est. board-certified rate (Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Thoracic Surgery (Cardiothoracic Vascular Surgery) 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).

KEVIN GREER, MD is a Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician provider practicing in GREEN BAY, Wisconsin, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: MD. NPI: 1609889757. 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.

KEVIN GREER, MD appears in the CMS NPPES registry as a Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician provider holding MD credentials at 720 SOUTH VAN BUREN STREET, GREEN BAY, WI, 54301, with a listed phone of (920) 433-9621. NPI 1609889757 was issued on 08/13/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what GREER 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 91 prescription claims written by this provider, covering 75 Medicare beneficiaries and totaling roughly $703 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.

Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician is a mid-sized specialty nationwide, with 5,062 enrolled providers across 52 states and an average of 128 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

720 SOUTH VAN BUREN STREET
GREEN BAY, WI 54301

Provider Details

NPI 1609889757
Specialty Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician
Credentials MD
Gender Male
NPI Issued 08/13/2006

Hospital and facility affiliations

Facilities where KEVIN GREER, MD 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.

BELLIN MEMORIAL HOSPITAL INC
GREEN BAY, WI

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 KEVIN GREER, MD. Source: openpaymentsdata.cms.gov.

Total received

$217

Largest payer

ABIOMED

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.

Medicare Part D Prescribing Data

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

91
Total Claims
$703
Total Drug Cost
75
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
103
Total Day Supply
1,577
Brand Drug Cost
$0
Generic Drug Cost
$703

Patient Demographics

Average Patient Age
73.6 years
Avg HCC Risk Score
1.10
Gender Split
32% female / 68% 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
Mupirocin
67

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

Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician Overview

How KEVIN GREER, MD fits within the Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician landscape nationally.

5,062
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician Providers in US
52
States with Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician
128
Avg Claims per Provider

KEVIN GREER, MD's 91 claims are below the specialty average of 128.

Nearby Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician Providers in Wisconsin

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

Compare Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is KEVIN GREER, MD's specialty?
KEVIN GREER, MD specializes in Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician and practices in GREEN BAY, Wisconsin. Credentials: MD.
How much does KEVIN GREER, MD prescribe under Medicare Part D?
In 2023, KEVIN GREER, MD wrote 91 Medicare Part D claims totaling $703 in drug costs for 75 beneficiaries.
Where is KEVIN GREER, MD located?
KEVIN GREER, MD is located at 720 SOUTH VAN BUREN STREET, GREEN BAY, WI, 54301. Phone: (920) 433-9621.
What is KEVIN GREER, MD's NPI number?
KEVIN GREER, MD's National Provider Identifier (NPI) is 1609889757, issued on 08/13/2006.
How many Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician providers are there in the US?
There are 5,062 Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician providers across 52 states in the US. The average Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician provider writes 128 Medicare Part D claims per year.
What drugs does KEVIN GREER, MD prescribe most often?
Based on 2023 Medicare Part D data, KEVIN GREER, MD's most frequently prescribed drugs include Mupirocin. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does KEVIN GREER, MD accept Medicare?
KEVIN GREER, MD appears in CMS Medicare data with 91 Part D claims and 75 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify KEVIN GREER, MD's credentials?
KEVIN GREER, MD's NPI is 1609889757 with credentials MD. 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