NPI registry status
Active
2026 NPPES data Clinical Pathology Physician NPI 1134173156 MD
Verify on CMS → Greg Heiler, MD
Clinical Pathology Physician in Eau Claire, Wisconsin.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 424 in Clinical Pathology Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
12
Medicare Part D claims · Clinical Pathology Physician avg: 259
MIPS score
91.7/100
▲ 8 pts above national avg 83.5 · Exceptional
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Greg Heiler, MD reported a CMS MIPS final score of 91.7/100 - above the 83.5 national average - and filed 12 Medicare Part D claims in 2024.
- 91.7/100
- MIPS score · +8 vs avg
- 12
- Part D claims, 2024
- Likely
- board-certified (heuristic)
- ≥61st
- pct among measured MIPS (lower-bound band)
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.
Federal trust snapshot
What official records show about Greg Heiler, MD
Federal records show an active NPI with both Medicare prescribing volume and a measured CMS quality score — objective registry data, not patient reviews.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1134173156), first enumerated 05/22/2006.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 12 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
CMS quality reporting (MIPS)
Reported a CMS MIPS final score of 91.7/100 in the Quality Payment Program — a federal quality measure, not a patient review.
Source: CMS Quality Payment Program
- Reported
Board certification signal
Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.
- Reported
Hospital affiliations
1 CMS Care Compare hospital affiliation on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
CMS NPPES provider registry desk
NPI 1134173156 · Clinical Pathology Physician
NPI-10 · ENUM-LEGACY · TAX-TRACE · MIPS-ABOVE · RX-TRACE · BOOK-THIN · PHOTO-FINISH
- NPI-10 1134173156
- ENUM-LEGACY 2006
- TAX-TRACE 424
- MIPS-ABOVE 91.7/100
- RX-TRACE 12
- BOOK-THIN 12 in Wisconsin
- PHOTO-FINISH Katie Sackett, D.O. · ±0.0
MIPS final-score neighbourhood
Same-specialty nationwide peers by CMS final score, not geographic proximity
- James Fink, MD ·…
James Fink, MD
91.4 MIPS pts
- Heiler · this pr…
Heiler · this provider
91.7 MIPS pts
- Katie Sackett, D…
Katie Sackett, D.O.
91.7 MIPS pts
- Abdulrahman Saad…
Abdulrahman Saadalla, MBBCH
92.1 MIPS pts
- Julio Delgado, M…
Julio Delgado, MD
92.1 MIPS pts
What this shows Nearest measured MIPS peers for this NUCC specialty (2023 performance year).
Greg Heiler, MD's MIPS score vs every measured U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure. Clinicians whose score CMS assigned without scoring any category are excluded.
92 ≥ 61st percentile 61% of 454,083 measured providers are in lower value bands
Each bar is a band; taller bars hold more measured providers. 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.
The percentile is a conservative whole-score-point band: it counts only measured clinicians in lower score bands. A CMS MIPS metric is not a recommendation or a clinical-quality rating by PlainDoctor. See methodology § corpus placement.
Source CMS Merit-based Incentive Payment System (MIPS) · 2023
✓
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).
What does the federal data show about Greg Heiler, MD?
High performer (top quartile)Primary specialty
Clinical Pathology Physician
Medicare Part D claims
12 95% vs specialty avg
MIPS final score
91.7/100 8.2 pts vs avg
Specialty distribution in Wisconsin
How Clinical Pathology Physician compares to other specialties among Wisconsin providers
Medicare quality performance, MIPS
Greg Heiler, MD's 2023 MIPS final score plotted against the Clinical Pathology Physician national average
- MIPS Final Score
- 91.7/100
- vs 83.5 national avg · 2023 performance year
How MIPS and board certification work
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).
Practice Address
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
Measured-score avg: 83.5
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 2024.
12
Total Claims
$512
Total Drug Cost
N/A
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 36
- Total Day Supply
- 1,080
- Brand Drug Cost
- $0
- Generic Drug Cost
- $512
Patient Demographics
- Average Patient Age
- 68.0 years
- Avg HCC Risk Score
- 0.27
Clinical Pathology Physician Overview
How Greg Heiler, MD fits within the Clinical Pathology Physician landscape nationally.
424
Clinical Pathology Physician Providers in US
51
States with Clinical Pathology Physician
259
Avg Claims per Provider
Greg Heiler, MD's 12 claims are below the specialty average of 259.
Nationwide Clinical Pathology Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Heiler, both outside Wisconsin so the neighborhoods are not geographic containment.
Similar MIPS final score
Nearest same-specialty clinicians by CMS MIPS final score (91.7 here).
Same NPPES enumeration year (2006)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
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.
One of 12 Clinical Pathology Physician providers enrolled in Wisconsin, 5 are shown here.
Dr. Donald Berry
D.O., D.C.
Janesville, WI
Dr. Eric Darrah
MD, PHD
Milwaukee, WI
Dr. Christine Fuja
DO
Madison, WI
Dr. Savanah Gisriel
MD, MPH
Madison, WI
Dr. Joseph Gormley
M.D.
West Bend, WI
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 2024, Greg Heiler, MD wrote 12 Medicare Part D claims totaling $512 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 91.7/100 (Quality: 80.9). The average MIPS Final Score across the 454,083 clinicians with at least one published category score is 83.5; clinicians whose score CMS assigned without scoring any category are excluded from that average. 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 424 Clinical Pathology Physician providers across 51 states in the US. The average Clinical Pathology Physician provider writes 259 Medicare Part D claims per year.
Does Greg Heiler, MD accept Medicare? ▼
Greg Heiler, MD appears in CMS Medicare data with 12 Part D claims and N/A Medicare beneficiaries in 2024. 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
View source datasets and methodology notes
- 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 (2024). 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 August 2026 (NPPES) / 2024 (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
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of August 2026.