Stephen Karel De Waal Malefyt, M.D.
Pediatrics Physician · Albany, NY
Stephen Karel De Waal Malefyt, M.D. is a pediatrics physician with a practice address in Albany, New York, and NPI 1245493337, issued on Jul 8, 2008. Check the license (New York 247241, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Stephen Karel De Waal Malefyt
- Credential
- M.D.
- Primary taxonomy
- Pediatrics Physician 208000000X
- License number
- 247241 NY
Self-reported in NPPES; status is on the state search - Practice location
- 391 Myrtle Ave, Albany, NY 12208
- Phone
- (518) 262-5588
- Enumerated
- Jul 8, 2008
- Record last updated
- Mar 23, 2016 (not updated in 10 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest pediatrics physician records → All 5,795 in New York → Look up another NPI →
Also registered at 391 Myrtle Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Stephen Karel De Waal Malefyt 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 247241Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
The practice group's MIPS final score for 2023 (Medicare payment program): 76.7 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).
Stephen Karel De Waal Malefyt among 5,795 pediatrics physician records in New York
Stephen Karel De Waal Malefyt, M.D. is one of 5,795 pediatrics physician records with a practice address in New York. 36% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 59% of them.
- NPI issued2008 · 59% of these records are older, 36% newer
- In a Medicare fileYes · 36% of these records are
- In the CMS Doctors and Clinicians fileNo · 8% of these records are
- Record last updated2016 · 66% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208000000X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Pediatrics Physician providers in New York
There are 5,795 pediatrics physician records in New York.
All 5,795 in New York → Every provider in Albany → Pediatrics Physician nationwide →
The 8 pediatrics physician records with the nearest ZIP codes
- Luise Ahlers, M.D.Albany, NY 122081871596742
- Rebecca Butterfield, M.D.Albany, NY 122081497784771
- Carol Cabral, MDAlbany, NY 122081184696155
- Robert Catalano, M.D.Albany, NY 122081063414589
- Melinda Clark, M.DAlbany, NY 122081699758029
- Kenneth Deitcher, M.D.Albany, NY 122081184614554
- Ronald Dick, MDAlbany, NY 122081275614539
- Anna Flik, MDAlbany, NY 122081043200173
Common questions
What is Stephen Karel De Waal Malefyt, M.D.'s NPI number?
Stephen Karel De Waal Malefyt, M.D.'s National Provider Identifier (NPI) is 1245493337, issued on Jul 8, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Stephen Karel De Waal Malefyt, M.D. located?
The NPPES record lists a practice address at 391 Myrtle Ave, Albany, NY, 12208. Phone: (518) 262-5588. Providers update this record themselves, so call before visiting.
How can I verify Stephen Karel De Waal Malefyt, M.D.'s license?
NPPES lists New York license number 247241, 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.
What is Stephen Karel De Waal Malefyt, M.D.'s MIPS final score?
The 2023 MIPS final score is 76.7 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.