Karyn Singer
Internal Medicine Physician · New York, NY
Karyn Singer is an internal medicine physician with a practice address in New York, New York, and NPI 1578730859, issued on May 14, 2008. Check the license (New York 258534, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Karyn Singer
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- 258534 NY
D72687 MD
Self-reported in NPPES; status is on the state search - Practice location
- 227 Madison St, New York, NY 10002
- Phone
- (212) 238-7897
- Enumerated
- May 14, 2008
- Record last updated
- Mar 31, 2015 (not updated in 11 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 12,067 in New York → Look up another NPI →
Also registered at 227 Madison St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Enrique Acosta, PAPhysician Assistant1346592235
- Jennifer Adams, MDInternal Medicine Physician1720006869
- Veronica Ades, M.D., M.P.H.Obstetrics & Gynecology Physician1578719092
- Cesar Aguilera, MDPediatrics Physician1174547012
- Lashonda Allen, SLPSpeech-Language Pathologist1902005887
- Jennifer Alonso, LMSWSocial Worker1982880340
Verify Karyn Singer 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 258534Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
84% fewer Medicare Part D claims than the average internal medicine physician in 2024
518 Medicare Part D claims for 28 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims.
Most prescribed
- Atorvastatin Calcium53 claims
- Metformin Hcl29 claims
- Losartan Potassium21 claims
- Famotidine20 claims
- Amlodipine Besylate18 claims
- Triamcinolone Acetonide18 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.
Karyn Singer among 12,067 internal medicine physician records in New York
Karyn Singer is one of 12,067 internal medicine physician records with a practice address in New York. 79% 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 56% of them.
- NPI issued2008 · 56% of these records are older, 40% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 60% of these records are
- Record last updated2015 · 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 207R00000X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
2,434 internal medicine physician records list a practice address in New York
They are 2,434 of the 98,468 NPPES records with a practice address in New York, and 12,067 internal medicine physician records in New York.
All 12,067 in New York → Every provider in New York → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Rajasekhar Buddhavarapu, M.D.New York, NY 100021013971498
- Deborah Dowell, MDNew York, NY 100021598702771
- Michael Gherman, MDNew York, NY 100021487691986
- Eric Giniger, MDNew York, NY 100021558308098
- Robert Goldman, MDNew York, NY 100021104866177
- Michael Guo, M.D.New York, NY 100021780649517
- Melanie Jay, MDNew York, NY 100021457308298
- Mini Liu, M.D.New York, NY 100021104865807
Common questions
What is Karyn Singer's NPI number?
Karyn Singer's National Provider Identifier (NPI) is 1578730859, issued on May 14, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Karyn Singer located?
The NPPES record lists a practice address at 227 Madison St, New York, NY, 10002. Phone: (212) 238-7897. Providers update this record themselves, so call before visiting.
How can I verify Karyn Singer's license?
NPPES lists New York license number 258534, 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 Karyn Singer prescribe under Medicare Part D?
In 2024, Karyn Singer had 518 Medicare Part D claims for 28 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.