Matthias Angelos Karajannis, MD
Pediatric Hematology & Oncology Physician · New York, NY
Matthias Angelos Karajannis, MD is a pediatric hematology & oncology physician with a practice address in New York, New York, and NPI 1174643167, issued on Mar 31, 2007. Check the license (New York 243584, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Matthias Angelos Karajannis
- Credential
- MD
- Primary taxonomy
- Pediatric Hematology & Oncology Physician 2080P0207X
- License number
- 243584 NY
Self-reported in NPPES; status is on the state search - Practice location
- 1275 York Ave, New York, NY 10065
- Phone
- (212) 639-3171
- Enumerated
- Mar 31, 2007
- Record last updated
- Apr 27, 2017 (not updated in 9 years: call before relying on the address or phone)
- Fax
- (212) 717-3239
- Medicare enrollment
- Enrolled (PECOS I20110329000003); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest pediatric hematology & oncology physician records → All 289 in New York → Look up another NPI →
Also registered at 1275 York Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Nivedita Aanur, M.D.Internal Medicine Physician1982833471
- Amy Aaronson, AC-PNP, RNCritical Care Pediatric Nurse Practitioner1407323504
- Michelle Abboud, N.P.Acute Care Nurse Practitioner1730596008
- Gina Abdulahad, PA-CPhysician Assistant1174027064
- Wassim Abida, MD, PHDHematology & Oncology Physician1518101096
- Lincy Abraham, NPPediatric Nurse Practitioner1295003739
Verify Matthias Angelos Karajannis 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 243584Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Memorial Pediatric GroupNew York, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Matthias Angelos Karajannis among 289 pediatric hematology & oncology physician records in New York
Matthias Angelos Karajannis, MD is one of 289 pediatric hematology & oncology physician records with a practice address in New York. 54% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 44% of them.
- NPI issued2007 · 44% of these records are older, 49% newer
- In a Medicare fileYes · 54% of these records are
- In the CMS Doctors and Clinicians fileYes · 29% of these records are
- Graduated1997 · median 2006 among the 85 with a school on file
- Record last updated2017 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2080P0207X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Pediatric Hematology & Oncology Physician providers in New York
There are 289 pediatric hematology & oncology physician records in New York.
All 289 in New York → Every provider in New York → Pediatric Hematology & Oncology Physician nationwide →
The 8 pediatric hematology & oncology physician records with the nearest ZIP codes
- Abdullrahman Alsultan, MBBSNew York, NY 100651144305376
- Ellen Basu, MDNew York, NY 100651588875603
- Moshe Bell, M.D.New York, NY 100651538239744
- Francine Blei, MD, MBANew York, NY 100651982698106
- Maria Cancio, M.D.New York, NY 100651528108479
- Alexander Chou, MDNew York, NY 100651124043484
- Julia Glade Bender, MDNew York, NY 100651104892561
- Katherine Hajjar, M.D.New York, NY 100651740377837
Common questions
What is Matthias Angelos Karajannis, MD's NPI number?
Matthias Angelos Karajannis, MD's National Provider Identifier (NPI) is 1174643167, issued on Mar 31, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Matthias Angelos Karajannis, MD located?
The NPPES record lists a practice address at 1275 York Ave, New York, NY, 10065. Phone: (212) 639-3171. Providers update this record themselves, so call before visiting.
How can I verify Matthias Angelos Karajannis, MD's license?
NPPES lists New York license number 243584, 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.
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.