James John Ignatz-Hoover, MD, PHD
Hematology & Oncology Physician · Cleveland, OH
James John Ignatz-Hoover, MD, PHD is a hematology & oncology physician with a practice address in Cleveland, Ohio, and NPI 1679076442, issued on Mar 17, 2018. Check the license (Ohio 35.142751, as entered in NPPES) on the State Medical Board of Ohio; the Medicare figures below come from public CMS files.
- Name
- James John Ignatz-Hoover
- Credential
- MD, PHD
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- 35.142751 OH
Self-reported in NPPES; status is on the state search - Practice location
- 11100 Euclid Ave, Cleveland, OH 44106
- Phone
- (216) 844-1000
- Enumerated
- Mar 17, 2018
- Record last updated
- Dec 3, 2024
- Medicaid ID
- 0021777 OH
- Medicare enrollment
- Enrolled (PECOS I20230802001424); accepts Medicare assignment
- Medical or professional school
- Clvlnd Clinic Lerner College Of Med Of Case Wstn Rsv University, 2018
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 513 in Ohio → Look up another NPI →
Also registered at 11100 Euclid Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify James John Ignatz-Hoover in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersState Medical Board of Ohio
Search for license 35.142751Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
83% fewer Medicare Part D claims than the average hematology & oncology physician in 2024
153 Medicare Part D claims for 20 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. Brand-name drugs were 24% of claims.
Most prescribed
- Lenalidomide27 claims
- Prochlorperazine Maleate22 claims
- Acyclovir20 claims
- Eliquis17 claims
- Revlimid14 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.
Industry payments in 2024: $935.32
24 payments; by number, the most common kind was food and beverage; the largest payer was Pfizer 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 one group practice
- University Hospitals Medical Group IncChesterland, OH
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
James John Ignatz-Hoover among 513 hematology & oncology physician records in Ohio
James John Ignatz-Hoover, MD, PHD is one of 513 hematology & oncology physician records with a practice address in Ohio. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2018, is newer than 90% of them.
- NPI issued2018 · 90% of these records are older, 7% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated2018 · median 2001 among the 369 with a school on file
- Record last updated2024 · 53% 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 Ohio 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 Ohio
There are 513 hematology & oncology physician records in Ohio.
All 513 in Ohio → Every provider in Cleveland → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Joseph Baar, MDCleveland, OH 441061346269230
- Joseph Bokar, MDCleveland, OH 441061881619492
- Afshin Dowlati, MDCleveland, OH 441061528084852
- Maria Espinosa, MDCleveland, OH 441061164411716
- Stanton Gerson, MDCleveland, OH 441061497771661
- Joseph Gibbons, MDCleveland, OH 441061639198450
- Brett Glotzbecker, M.D.Cleveland, OH 441061649248899
- Balazs Halmos, MDCleveland, OH 441061013933290
Common questions
What is James John Ignatz-Hoover, MD, PHD's NPI number?
James John Ignatz-Hoover, MD, PHD's National Provider Identifier (NPI) is 1679076442, issued on Mar 17, 2018. An NPI identifies a provider in billing; it is not a license.
Where is James John Ignatz-Hoover, MD, PHD located?
The NPPES record lists a practice address at 11100 Euclid Ave, Cleveland, OH, 44106. Phone: (216) 844-1000. Providers update this record themselves, so call before visiting.
How can I verify James John Ignatz-Hoover, MD, PHD's license?
NPPES lists Ohio license number 35.142751, as entered by the provider. Search the State Medical Board of Ohio at https://elicense.ohio.gov/oh_verifylicense. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does James John Ignatz-Hoover, MD, PHD prescribe under Medicare Part D?
In 2024, James John Ignatz-Hoover, MD, PHD had 153 Medicare Part D claims for 20 beneficiaries; the average among hematology & oncology physician prescribers was 877. Part D covers Medicare prescriptions only.
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.