Klaus Dittmar, M.D.
Hematology & Oncology Physician · New Hyde Park, NY
Klaus Dittmar, M.D. is a hematology & oncology physician with a practice address in New Hyde Park, New York, and NPI 1245239664, issued on Jul 18, 2005. Check the license (New York 089981, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Klaus Dittmar
- Credential
- M.D.
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- 089981 NY
Self-reported in NPPES; status is on the state search - Practice location
- 1999 Marcus Ave Ste 306, New Hyde Park, NY 11042
- Phone
- (516) 627-1221
- Enumerated
- Jul 18, 2005
- Record last updated
- Mar 25, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (516) 627-6857
- Medicare enrollment
- Enrolled (PECOS I20081223000445); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 1,163 in New York → Look up another NPI →
Also registered at 1999 Marcus Ave Ste 306
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Gerard Donnelly, M.D.Hematology & Oncology Physician1518966944
- Rosemary Fine, NPNurse Practitioner1558870162
- Richard Forte, M.D.Hematology & Oncology Physician1891794210
- Amanda GambinoClinical Social Worker1063356434
- Ari Ginsberg, M.D.Hematology & Oncology Physician1184628059
- William Given, MDRheumatology Physician1447329305
Verify Klaus Dittmar in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNYS Education Department, Office of the Professions
Search for license 089981Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average hematology & oncology physician in 2024
17 Medicare Part D claims, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D.
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 practice group's MIPS final score for 2023 (Medicare payment program): 84.5 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. 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, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- New York UniversityJamaica, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Klaus Dittmar among 1,163 hematology & oncology physician records in New York
Klaus Dittmar, M.D. is one of 1,163 hematology & oncology physician records with a practice address in New York. 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 85% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated1957 · median 2002 among the 833 with a school on file
- Record last updated2021 · 61% 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 New York 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 New York
There are 1,163 hematology & oncology physician records in New York.
All 1,163 in New York → Every provider in New Hyde Park → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Francis Arena, MDLake Success, NY 110421699760132
- Gerard Donnelly, M.D.New Hyde Park, NY 110421518966944
- Richard Forte, M.D.New Hyde Park, NY 110421891794210
- Francisco Garcia-Moreno, MDLake Success, NY 110421144223264
- Ari Ginsberg, M.D.New Hyde Park, NY 110421184628059
- Ummekalsoom Malik, MDLake Success, NY 110421124021209
- John Marino, M.D.New Hyde Park, NY 110421538163803
- Brian McNelis, M.D.New Hyde Park, NY 110421194727263
Common questions
What is Klaus Dittmar, M.D.'s NPI number?
Klaus Dittmar, M.D.'s National Provider Identifier (NPI) is 1245239664, issued on Jul 18, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Klaus Dittmar, M.D. located?
The NPPES record lists a practice address at 1999 Marcus Ave Ste 306, New Hyde Park, NY, 11042. Phone: (516) 627-1221. Providers update this record themselves, so call before visiting.
How can I verify Klaus Dittmar, M.D.'s license?
NPPES lists New York license number 089981, as entered by the provider. Search the NYS Education Department, Office of the Professions at https://www.op.nysed.gov/services/verifications/online-verification-searches. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Klaus Dittmar, M.D. prescribe under Medicare Part D?
In 2024, Klaus Dittmar, M.D. had 17 Medicare Part D claims; the average among hematology & oncology physician prescribers was 877. Part D covers Medicare prescriptions only.
What is Klaus Dittmar, M.D.'s MIPS final score?
The 2023 MIPS final score is 84.5 of 100, reported for the practice group. 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.