NPPES file of Aug 9, 2026

Sarah Kohnstamm, M.D.

Cardiovascular Disease Physician · Ann Arbor, MI

Sarah Kohnstamm, M.D. is a cardiovascular disease physician with a practice address in Ann Arbor, Michigan, and NPI 1679691521, issued on Mar 27, 2007. Check the license (Michigan 4301083663, as entered in NPPES) on the Michigan Board of Medicine (LARA); the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1679691521
Name
Sarah Kohnstamm
Credential
M.D.
Primary taxonomy
Cardiovascular Disease Physician 207RC0000X
License numbers
4301083663 MI
MD442328 PA
Self-reported in NPPES; status is on the state search
Practice location
24 Frank Lloyd Wright Dr, Ann Arbor, MI 48105
Phone
(734) 998-7400
Enumerated
Mar 27, 2007
Record last updated
Feb 14, 2020 (not updated in 6 years: call before relying on the address or phone)
Medicare enrollment
Enrolled (PECOS I20070907000449); accepts Medicare assignment
Medical or professional school
Yale University School Of Medicine, 2004
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest cardiovascular disease physician records → All 860 in Michigan → Look up another NPI →

Also registered at 24 Frank Lloyd Wright Dr

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Jaclyn Abbott, NPPrimary Care Nurse Practitioner1952800435
  2. Alison Affinati, MD, PHDEndocrinology, Diabetes & Metabolism Physician1871983502
  3. Vahan Agbabian, MA, ATCAthletic Trainer1487759676
  4. William Aibinder, MDOrthopaedic Surgery Physician1225474042
  5. Nevin Ajluni, M.D.Endocrinology, Diabetes & Metabolism Physician1407019995
  6. Sarah Akers, LPNLicensed Practical Nurse1063383396

Verify Sarah Kohnstamm in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)
    Search for license 4301083663    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Michigan license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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55% fewer Medicare Part D claims than the average cardiovascular disease physician in 2024

1,381 Medicare Part D claims for 214 beneficiaries, against an average of 3,078 among the 20,728 providers of this specialty who prescribed in Part D. Brand-name drugs were 18% of claims.

  1. Sarah Kohnstamm1,381
  2. Specialty average3,078

Most prescribed

  1. Atorvastatin Calcium147 claims
  2. Metoprolol Succinate140 claims
  3. Rosuvastatin Calcium115 claims
  4. Furosemide88 claims
  5. Eliquis68 claims
  6. Ezetimibe67 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.

Bills Medicare through one group practice

  1. Regents OF The University OF MichiganCanton, MI

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Sarah Kohnstamm among 860 cardiovascular disease physician records in Michigan

Sarah Kohnstamm, M.D. is one of 860 cardiovascular disease physician records with a practice address in Michigan. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 56% of them.

  • NPI issued2007 · 56% of these records are older, 34% newer
  • In a Medicare fileYes · 84% of these records are
  • In the CMS Doctors and Clinicians fileYes · 70% of these records are
  • Graduated2004 · median 1999 among the 606 with a school on file
  • Record last updated2020 · 59% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RC0000X and a Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Cardiovascular Disease Physician providers in Michigan

There are 860 cardiovascular disease physician records in Michigan.

All 860 in Michigan → Every provider in Ann Arbor → Cardiovascular Disease Physician nationwide →

The 8 cardiovascular disease physician records with the nearest ZIP codes

  1. Eric Bates, MDAnn Arbor, MI 481051619055266
  2. Mark Benson, MDAnn Arbor, MI 481051548226616
  3. Rinky Bhatia, MDAnn Arbor, MI 481051104952811
  4. Nicole Bhave, MDAnn Arbor, MI 481051730216185
  5. John Bisognano, MDAnn Arbor, MI 481051992747752
  6. James Byrd, M.D.Ann Arbor, MI 481051639245665
  7. Claire Duvernoy, MDAnn Arbor, MI 481051932284882
  8. Kim Eagle, MDAnn Arbor, MI 481051669558797

Common questions

What is Sarah Kohnstamm, M.D.'s NPI number?

Sarah Kohnstamm, M.D.'s National Provider Identifier (NPI) is 1679691521, issued on Mar 27, 2007. An NPI identifies a provider in billing; it is not a license.

Where is Sarah Kohnstamm, M.D. located?

The NPPES record lists a practice address at 24 Frank Lloyd Wright Dr, Ann Arbor, MI, 48105. Phone: (734) 998-7400. Providers update this record themselves, so call before visiting.

How can I verify Sarah Kohnstamm, M.D.'s license?

NPPES lists Michigan license number 4301083663, as entered by the provider. Search the Michigan Board of Medicine (LARA) at https://aca-prod.accela.com/MILARA/GeneralProperty/PropertyLookUp.aspx?isLicensee=Y&TabName=APO. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

How much does Sarah Kohnstamm, M.D. prescribe under Medicare Part D?

In 2024, Sarah Kohnstamm, M.D. had 1,381 Medicare Part D claims for 214 beneficiaries; the average among cardiovascular disease physician prescribers was 3,078. 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.