Alexandra B. Kiefer, MD
Obstetrics & Gynecology Physician · Stony Brook, NY
Alexandra B. Kiefer, MD is an obstetrics & gynecology physician with a practice address in Stony Brook, New York, and NPI 1689107641, issued on Apr 6, 2017. Check the license (New York 315865, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Alexandra B. Kiefer
- Credential
- MD
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- 315865 NY
Self-reported in NPPES; status is on the state search - Practice location
- 101 Nicolls R Obgyn Dept Hsc Level 9, Stony Brook, NY 11794
- Phone
- (631) 444-4686
- Enumerated
- Apr 6, 2017
- Record last updated
- May 8, 2022
- Medicare enrollment
- Enrolled (PECOS I20220714001865); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 3,174 in New York → Look up another NPI →
Verify Alexandra B. Kiefer 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 315865Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
66% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024
56 Medicare Part D claims for 23 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D.
Most prescribed
- Valacyclovir11 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
- University Associates IN Obstetrics And Gynecology University FacultyStony Brook, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Alexandra B. Kiefer among 3,174 obstetrics & gynecology physician records in New York
Alexandra B. Kiefer, MD is one of 3,174 obstetrics & gynecology physician records with a practice address in New York. 76% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2017, is newer than 86% of them.
- NPI issued2017 · 86% of these records are older, 12% newer
- In a Medicare fileYes · 76% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2018 · median 2002 among the 1,870 with a school on file
- Record last updated2022 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207V00000X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Obstetrics & Gynecology Physician providers in New York
There are 3,174 obstetrics & gynecology physician records in New York.
All 3,174 in New York → Every provider in Stony Brook → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Joseph Bacchi, M.D.Stony Brook, NY 117941801242342
- Mindy Baucicot, MDStony Brook, NY 117941003444670
- Diana Calero-Kunda, MDStony Brook, NY 117941326321704
- Stefanie Cardamone, M.D.Stony Brook, NY 117941760610562
- Fatima Daoud Yilmaz, M.D.Stony Brook, NY 117941407387756
- Sara Kim, MDStony Brook, NY 117941477949360
- Amy Lasky, MDStony Brook, NY 117941689069064
- Lan Lee, M.D.Stony Brook, NY 117941871751065
Common questions
What is Alexandra B. Kiefer, MD's NPI number?
Alexandra B. Kiefer, MD's National Provider Identifier (NPI) is 1689107641, issued on Apr 6, 2017. An NPI identifies a provider in billing; it is not a license.
Where is Alexandra B. Kiefer, MD located?
The NPPES record lists a practice address at 101 Nicolls R Obgyn Dept Hsc Level 9, Stony Brook, NY, 11794. Phone: (631) 444-4686. Providers update this record themselves, so call before visiting.
How can I verify Alexandra B. Kiefer, MD's license?
NPPES lists New York license number 315865, 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 Alexandra B. Kiefer, MD prescribe under Medicare Part D?
In 2024, Alexandra B. Kiefer, MD had 56 Medicare Part D claims for 23 beneficiaries; the average among obstetrics & gynecology physician prescribers was 165. Part D covers Medicare prescriptions only.
What is Alexandra B. Kiefer, 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.