Elizabeth Sarah Hammer, MD
Nephrology Physician · Brooklyn, NY
Elizabeth Sarah Hammer, MD is a nephrology physician with a practice address in Brooklyn, New York, and NPI 1104117340, issued on Apr 21, 2011. Check the license (New York 268356, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Elizabeth Sarah Hammer
- Credential
- MD
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License number
- 268356 NY
Self-reported in NPPES; status is on the state search - Practice location
- 6740 4TH Ave FL 3, Brooklyn, NY 11220
- Phone
- (929) 455-2000
- Enumerated
- Apr 21, 2011
- Record last updated
- Apr 9, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20160818001509); accepts Medicare assignment
- Medical or professional school
- Icahn School Of Medicine At Mount Sinai, 2011
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest nephrology physician records → All 1,049 in New York → Look up another NPI →
Also registered at 6740 4TH Ave FL 3
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Maureen Clark, D.O.Obstetrics & Gynecology Physician1164871281
- Kelly Flores, D.O.Obstetrics & Gynecology Physician1033563309
- Marc Gottlieb, M.D.Otolaryngology Physician1104803287
- Shaneka Gregory, NPNurse Practitioner1841835691
- Frederick Gulmi, MDUrology Physician1588652838
Verify Elizabeth Sarah Hammer 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 268356Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2% more Medicare Part D claims than the average nephrology physician in 2024
1,499 Medicare Part D claims for 243 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D. Brand-name drugs were 21% of claims.
Most prescribed
- Furosemide136 claims
- Jardiance131 claims
- Losartan Potassium127 claims
- Amlodipine Besylate82 claims
- Lisinopril72 claims
- Allopurinol71 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): 89.9 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).
Industry payments in 2024: $239.50
11 payments; by number, the most common kind was food and beverage; the largest payer was Novartis Pharmaceuticals Corporation. The 8,230 providers of this specialty with any payment received $3,091.37 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- New York UniversityNew York, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Elizabeth Sarah Hammer among 1,049 nephrology physician records in New York
Elizabeth Sarah Hammer, MD is one of 1,049 nephrology physician records with a practice address in New York. 85% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2011, is newer than 74% of them.
- NPI issued2011 · 74% of these records are older, 23% newer
- In a Medicare fileYes · 85% of these records are
- In the CMS Doctors and Clinicians fileYes · 73% of these records are
- Graduated2011 · median 1999 among the 764 with a school on file
- Record last updated2021 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RN0300X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Nephrology Physician providers in New York
There are 1,049 nephrology physician records in New York.
All 1,049 in New York → Every provider in Brooklyn → Nephrology Physician nationwide →
The 8 nephrology physician records with the nearest ZIP codes
- Adib Alhaddad, M.D.Brooklyn, NY 112201124118831
- Antonio Nicoletta, M.D.Brooklyn, NY 112201548357130
- Sein See, M.D.Brooklyn, NY 112201639300981
- Li Yang, MDBrooklyn, NY 112201598035081
- Elie Fein, MDBrooklyn, NY 112191366523839
- Nicholas FucaBrooklyn, NY 112191447605340
- Sheldon Greenberg, MDBrooklyn, NY 112191831270305
- Andrzej Kozyra, MDBrooklyn, NY 112191144603952
Common questions
What is Elizabeth Sarah Hammer, MD's NPI number?
Elizabeth Sarah Hammer, MD's National Provider Identifier (NPI) is 1104117340, issued on Apr 21, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Elizabeth Sarah Hammer, MD located?
The NPPES record lists a practice address at 6740 4TH Ave FL 3, Brooklyn, NY, 11220. Phone: (929) 455-2000. Providers update this record themselves, so call before visiting.
How can I verify Elizabeth Sarah Hammer, MD's license?
NPPES lists New York license number 268356, 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 Elizabeth Sarah Hammer, MD prescribe under Medicare Part D?
In 2024, Elizabeth Sarah Hammer, MD had 1,499 Medicare Part D claims for 243 beneficiaries; the average among nephrology physician prescribers was 1,465. Part D covers Medicare prescriptions only.
What is Elizabeth Sarah Hammer, MD's MIPS final score?
The 2023 MIPS final score is 89.9 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.