William A. Fabricius, M.D.
Hematology & Oncology Physician · Greenville, MI
William A. Fabricius, M.D. is a hematology & oncology physician with a practice address in Greenville, Michigan, and NPI 1568698645, issued on Jun 3, 2009. Check the license on the Michigan Board of Medicine (LARA); the Medicare figures below come from public CMS files.
- Name
- William A. Fabricius
- Credential
- M.D.
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- MD20974 ME
Self-reported in NPPES; status is on the state search - Practice location
- 615 S Bower St, Greenville, MI 48838
- Phone
- (616) 954-9800
- Enumerated
- Jun 3, 2009
- Record last updated
- Jul 6, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20210630001915); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 340 in Michigan → Look up another NPI →
Also registered at 615 S Bower St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Travis Cook, DOEmergency Medicine Physician1700528031
- Ora Darling, PAPhysician Assistant1003346636
- Vincent De Las Alas, M.D.Anesthesiology Physician1891731691
Verify William A. Fabricius in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)Check the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
65% more Medicare Part D claims than the average hematology & oncology physician in 2024
1,445 Medicare Part D claims for 230 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. Brand-name drugs were 19% of claims. 41 claims were for opioids.
Most prescribed
- Acyclovir161 claims
- Prednisone130 claims
- Hydroxyurea114 claims
- Folic Acid75 claims
- Dexamethasone67 claims
- Prochlorperazine Maleate67 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The MIPS final score for 2023 (Medicare payment program): 100 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $1,271.75
57 payments; by number, the most common kind was food and beverage; the largest payer was Takeda Pharmaceuticals U.S.A., Inc. The 8,560 providers of this specialty with any payment received $7,481.41 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 3 group practices
- Cancer And Hematology Centers OF Western MI, P.C.Grand Rapids, MI
- Center For Physical Rehabilitation And Therapy LPGrand Rapids, MI
- Center For Physical Rehabilitation IncGrand Rapids, MI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William A. Fabricius among 340 hematology & oncology physician records in Michigan
William A. Fabricius, M.D. is one of 340 hematology & oncology physician records with a practice address in Michigan. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2009, is newer than 58% of them.
- NPI issued2009 · 58% of these records are older, 40% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 61% of these records are
- Graduated2002 · median 2004 among the 206 with a school on file
- Record last updated2021 · 52% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RH0003X and a Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hematology & Oncology Physician providers in Michigan
There are 340 hematology & oncology physician records in Michigan.
All 340 in Michigan → Every provider in Greenville → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Anthony Brandau, D.O.East Lansing, MI 488231346560182
- Carol Rapson, MDEast Lansing, MI 488231073513917
- Somdev Roy, MDMt Pleasant, MI 488581851322747
- Tannu Sahay, M.D.Mt Pleasant, MI 488581962676254
- Anas Alsara, MDOwosso, MI 488671932498599
- Ronald Kawauchi, MDOwosso, MI 488671275625147
- Mohamed Akkad, M.D.Alma, MI 488011710299557
- Alfarooq Alshaikhli, MDLansing, MI 489101881275352
Common questions
What is William A. Fabricius, M.D.'s NPI number?
William A. Fabricius, M.D.'s National Provider Identifier (NPI) is 1568698645, issued on Jun 3, 2009. An NPI identifies a provider in billing; it is not a license.
Where is William A. Fabricius, M.D. located?
The NPPES record lists a practice address at 615 S Bower St, Greenville, MI, 48838. Phone: (616) 954-9800. Providers update this record themselves, so call before visiting.
How can I verify William A. Fabricius, M.D.'s license?
Search the Michigan Board of Medicine (LARA) at https://aca-prod.accela.com/MILARA/GeneralProperty/PropertyLookUp.aspx?isLicensee=Y&TabName=APO. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does William A. Fabricius, M.D. prescribe under Medicare Part D?
In 2024, William A. Fabricius, M.D. had 1,445 Medicare Part D claims for 230 beneficiaries; the average among hematology & oncology physician prescribers was 877. Part D covers Medicare prescriptions only.
What is William A. Fabricius, M.D.'s MIPS final score?
The 2023 MIPS final score is 100 of 100. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.