Katherine Allyn
Internal Medicine Physician · New York, NY
Katherine Allyn is an internal medicine physician with a practice address in New York, New York, and NPI 1902435654, issued on Apr 5, 2020. Check the license (New York 324184, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Katherine Allyn
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 324184 NY
Self-reported in NPPES; status is on the state search - Practice location
- 17 E 102ND St, New York, NY 10029
- Phone
- (212) 659-8551
- Enumerated
- Apr 5, 2020
- Entity
- Type 1 · individual
Also registered at 17 E 102ND St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Judith Aberg, M.D.Internal Medicine Physician1902969645
- Helen Adams, PA-CMedical Physician Assistant1588844815
- Ritu Agarwal, M.D.Hepatology Physician1942448345
- Maddalena Allegretta, MDRheumatology Physician1902337710
- Aviv Alter, MDCardiovascular Disease Physician1548886039
- Justine AndersonStudent in an Organized Health Care Education/Training Program1518594175
Verify Katherine Allyn 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 324184Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
47% fewer Medicare Part D claims than the average internal medicine physician in 2024
1,485 Medicare Part D claims for 190 beneficiaries, against an average of 2,785 among the 127,794 providers of this specialty who prescribed in Part D. Brand-name drugs were 18% of claims.
Most prescribed
- Atorvastatin Calcium112 claims
- Amlodipine Besylate78 claims
- Gabapentin67 claims
- Fluticasone Propionate63 claims
- Albuterol Sulfate Hfa57 claims
- Levothyroxine Sodium49 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.
One hospital or facility affiliation
- Icahn School OF Medicine AT Mount SinaiNew York, NY
Source: CMS Doctors and Clinicians affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
3,108 internal medicine physician records list a New York practice address
They are 3,108 of the 98,468 NPPES records with a New York practice address, and 13,725 internal medicine physician records in New York.
All 3,108 in New York → All 13,725 in New York → Every provider in New York →
Other internal medicine physician records in New York
- Deborah Aanonsen, D.O.Staten Island, NY1952395717
- Nivedita Aanur, M.D.New York, NY1982833471
- Jay Aaron, MDGreat Neck, NY1245332956
- Justin Aaron, MDNew York, NY1619243912
- Ahmad AbadiPoughkeepsie, NY1780258517
- Jamsheed Abadi, MDBrooklyn, NY1477537496
- Theophine Abakporo, M.D.Brooklyn, NY1972564813
- Antonieta Abarientos, MDNew Rochelle, NY1649285123
- Charles Abate, MDOssining, NY1720180003
- Vyachislav Abayev, M.D.Brooklyn, NY1437394574
Common questions
What is Katherine Allyn's NPI number?
Katherine Allyn's National Provider Identifier (NPI) is 1902435654, issued on Apr 5, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Katherine Allyn located?
The NPPES record lists a practice address at 17 E 102ND St, New York, NY, 10029. Phone: (212) 659-8551. Providers update this record themselves, so call before visiting.
How can I verify Katherine Allyn's license?
NPPES lists New York license number 324184, 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 Katherine Allyn prescribe under Medicare Part D?
In 2024, Katherine Allyn had 1,485 Medicare Part D claims for 190 beneficiaries; the average among internal medicine physician prescribers was 2,785. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.