Katherine Siamas, MD
Dermatology Physician · New York, NY
Katherine Siamas, MD is a dermatology physician with a practice address in New York, New York, and NPI 1013209212, issued on May 5, 2011. Check the license (New York 270477, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Katherine Siamas
- Credential
- MD
- Primary taxonomy
- Dermatology Physician 207N00000X
- License number
- 270477 NY
Self-reported in NPPES; status is on the state search - Practice location
- 445 E 58TH St, New York, NY 10022
- Phone
- (212) 838-0270
- Enumerated
- May 5, 2011
- Record last updated
- Sep 24, 2014 (not updated in 12 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20141002000219); accepts Medicare assignment
- Entity
- Type 1 · individual
Also registered at 445 E 58TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Daniel Foitl, MDDermatology Physician1861499147
- Peter Lombardo, M.D.Dermatology Physician1487657771
- Adam Nabatian, M.D.Dermatology Physician1548569437
Verify Katherine Siamas 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 270477Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
30% fewer Medicare Part D claims than the average dermatology physician in 2024
557 Medicare Part D claims for 205 beneficiaries, against an average of 797 among the 12,802 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of claims.
Most prescribed
- Clobetasol Propionate50 claims
- Minoxidil47 claims
- Nystatin43 claims
- Triamcinolone Acetonide43 claims
- Ketoconazole39 claims
- Doxycycline Hyclate35 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.
The MIPS final score for 2023 (Medicare payment program): 98.5 of 100
The Merit-based Incentive Payment System score is reported for this clinician. 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; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Stony Brook Dermatology Associates, University Faculty Practice CorporStony Brook, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Dermatology Physician providers in New York
There are 1,211 dermatology physician records in New York.
Other dermatology physician records in New York
- Jules Abadi, MDEast Patchogue, NY1093808966
- Dale Abadir, MDRye Brook, NY1396845798
- Roxanne Abitbol, M.D.Oceanside, NY1841415197
- Brian Abittan, M.D.New York, NY1902284482
- Ariel Abraham, M.D.Southampton, NY1548503063
- Peter Accetta, M.D.Orchard Park, NY1912961467
- Jonas Adalsteinsson, MDNew York, NY1881190635
- Lauren Adams, MDMount Kisco, NY1457679243
- Natnaelle Admassu, MD, MSNew York, NY1154909000
- Prince Adotama, M.D.New York, NY1700273349
Common questions
What is Katherine Siamas, MD's NPI number?
Katherine Siamas, MD's National Provider Identifier (NPI) is 1013209212, issued on May 5, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Katherine Siamas, MD located?
The NPPES record lists a practice address at 445 E 58TH St, New York, NY, 10022. Phone: (212) 838-0270. Providers update this record themselves, so call before visiting.
How can I verify Katherine Siamas, MD's license?
NPPES lists New York license number 270477, 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 Siamas, MD prescribe under Medicare Part D?
In 2024, Katherine Siamas, MD had 557 Medicare Part D claims for 205 beneficiaries; the average among dermatology physician prescribers was 797. Part D covers Medicare prescriptions only.
What is Katherine Siamas, MD's MIPS final score?
The 2023 MIPS final score is 98.5 of 100. 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.