2026 NPPES data Clinical Pathology Physician NPI 1134173156 MD
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GREG HEILER, MD

Clinical Pathology Physician in EAU CLAIRE, 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
11
Medicare Part D claims · Clinical Pathology Physician avg: 194
MIPS score
91.7456/100
▲ 9 pts above national avg 83.1 · [object Object]
What the federal data reveals: GREG HEILER, MD is a Clinical Pathology Physician ([object Object]) practicing in EAU CLAIRE, Wisconsin with a Medicare Part D prescribing footprint of 11 claims . Their CMS MIPS Final Score of 91.7456/100 (national average: 83.1) reflects performance across Quality, Cost, Interoperability, and Improvement Activities .

What stands out: GREG HEILER, MD reported a CMS MIPS final score of 91.7456 out of 100, above the 83.1 national average, and filed 11 Medicare Part D claims in 2023. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board certification likely (heuristic — not verified)

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

GREG HEILER, MD at a glance

High performer (top quartile)

NPI registry status

Active

Issued 05/22/2006

NPI 1134173156

Primary specialty

Clinical Pathology Physician

Rare

402 US NPIs in this specialty

Medicare Part D claims

11 94% vs specialty avg

2023 prescription claims

Specialty avg: 194

MIPS final score

91.7456/100 8.645600000000002% pts

Exceptional band

vs 83.1 national avg

Specialty distribution in Wisconsin

How Clinical Pathology Physician compares to other specialties among Wisconsin providers

Wisconsin providers

Clinical Pathology Physician share within Wisconsin

1. Clinical Pathology Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Clinical Pathology Physician share within Wisconsin

Medicare quality performance — MIPS

GREG HEILER, MD's 2023 MIPS final score plotted against the Clinical Pathology Physician national average

High performer (top quartile)
MIPS Final Score
91.7456/100
vs 83.1 national avg · 2023 performance year

MIPS final score (Clinical Pathology Physician) — 91.7456/100 vs national avg 83.1

0%100%National avg83%91.7%
MIPS final score (Clinical Pathology Physician) — 91.7456/100 vs national avg 83.1

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).

GREG HEILER, MD is a Clinical Pathology Physician provider practicing in EAU CLAIRE, Wisconsin, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: MD. NPI: 1134173156. 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.

GREG HEILER, MD appears in the CMS NPPES registry as a Clinical Pathology Physician provider holding MD credentials at 900 WEST CLAIREMONT AVENUE, EAU CLAIRE, WI, 54701, with a listed phone of (715) 839-4121. NPI 1134173156 was issued on 05/22/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what HEILER 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 11 prescription claims written by this provider, covering N/A Medicare beneficiaries and totaling roughly $288 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. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 91.7456/100 for the 2023 performance year (Quality 80.8696), compared with the national average of 83.1.

Clinical Pathology Physician is a narrow specialty nationwide, with 402 enrolled providers across 48 states and an average of 194 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

900 WEST CLAIREMONT AVENUE
EAU CLAIRE, WI 54701

Provider Details

NPI 1134173156
Specialty Clinical Pathology Physician
Credentials MD
Gender Male
NPI Issued 05/22/2006

CMS Quality Score (MIPS)

Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.

91.7456
Final Score
Avg: 83.1
80.8696
Quality

Reporting: Group practice

Hospital and facility affiliations

Facilities where GREG HEILER, 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.

PATHOLOGY SERVICE CORPORATION
ALTOONA, 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).

Medicare Part D Prescribing Data

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

11
Total Claims
$288
Total Drug Cost
N/A
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
33
Total Day Supply
990
Brand Drug Cost
$0
Generic Drug Cost
$288

Patient Demographics

Average Patient Age
67.0 years
Avg HCC Risk Score
0.26

Clinical Pathology Physician Overview

How GREG HEILER, MD fits within the Clinical Pathology Physician landscape nationally.

402
Clinical Pathology Physician Providers in US
48
States with Clinical Pathology Physician
194
Avg Claims per Provider

GREG HEILER, MD's 11 claims are below the specialty average of 194.

Nearby Clinical Pathology Physician Providers in Wisconsin

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

Compare Clinical Pathology Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is GREG HEILER, MD's specialty?
GREG HEILER, MD specializes in Clinical Pathology Physician and practices in EAU CLAIRE, Wisconsin. Credentials: MD.
How much does GREG HEILER, MD prescribe under Medicare Part D?
In 2023, GREG HEILER, MD wrote 11 Medicare Part D claims totaling $288 in drug costs for N/A beneficiaries.
What is GREG HEILER, MD's Medicare quality score?
GREG HEILER, MD has a CMS MIPS Final Score of 91.7456/100 (Quality: 80.8696). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is GREG HEILER, MD located?
GREG HEILER, MD is located at 900 WEST CLAIREMONT AVENUE, EAU CLAIRE, WI, 54701. Phone: (715) 839-4121.
What is GREG HEILER, MD's NPI number?
GREG HEILER, MD's National Provider Identifier (NPI) is 1134173156, issued on 05/22/2006.
How many Clinical Pathology Physician providers are there in the US?
There are 402 Clinical Pathology Physician providers across 48 states in the US. The average Clinical Pathology Physician provider writes 194 Medicare Part D claims per year.
Does GREG HEILER, MD accept Medicare?
GREG HEILER, MD appears in CMS Medicare data with 11 Part D claims and N/A Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify GREG HEILER, MD's credentials?
GREG HEILER, MD's NPI is 1134173156 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.
Quality Performance
CMS Merit-based Incentive Payment System (MIPS) — 2023 performance year.
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