Cassie A. Kosarek, MD
Psychiatry Physician · Hanover, NH
Cassie A. Kosarek, MD is a psychiatry physician with a practice address in Hanover, New Hampshire, and NPI 1114504099, issued on Mar 26, 2021. Check the license (New Hampshire 35234, as entered in NPPES) on the New Hampshire Board of Medicine; the Medicare figures below come from public CMS files.
- Name
- Cassie A. Kosarek
- Credential
- MD
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License numbers
- 35234 NH
042.0018707 VT
Self-reported in NPPES; status is on the state search - Practice location
- 3 Lebanon St Ste 39, Hanover, NH 03755
- Phone
- (802) 526-4810
- Enumerated
- Mar 26, 2021
- Record last updated
- Mar 4, 2026
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 263 in New Hampshire → Look up another NPI →
Verify Cassie A. Kosarek in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNew Hampshire Board of Medicine
Search for license 35234Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
97% fewer Medicare Part D claims than the average psychiatry physician in 2024
33 Medicare Part D claims, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of 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.
Cassie A. Kosarek among 263 psychiatry physician records in New Hampshire
Cassie A. Kosarek, MD is one of 263 psychiatry physician records with a practice address in New Hampshire. 71% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2021, is newer than 93% of them.
- NPI issued2021 · 93% of these records are older, 5% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileNo · 52% of these records are
- Record last updated2026 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084P0800X and a New Hampshire practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
4 psychiatry physician records list a practice address in Hanover
They are 4 of the 221 NPPES records with a practice address in Hanover, and 263 psychiatry physician records in New Hampshire.
All 263 in New Hampshire → Every provider in Hanover → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Ralph Albertini, M.D.Hanover, NH 037551144277872
- Carolyn Solzhenitsyn, MDHanover, NH 037551689730186
- Benita Walton, M.D.Hanover, NH 037551497761092
- Mehmet Dokucu, MDLebanon, NH 037561285650408
- Bradley Erickson, M.D.Lebanon, NH 037561821106659
- Christine Finn, MDLebanon, NH 037561841280971
- Julia Frew, MDLebanon, NH 037561417069907
- Paul Holtzheimer, MDLebanon, NH 037561548271893
Common questions
What is Cassie A. Kosarek, MD's NPI number?
Cassie A. Kosarek, MD's National Provider Identifier (NPI) is 1114504099, issued on Mar 26, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Cassie A. Kosarek, MD located?
The NPPES record lists a practice address at 3 Lebanon St Ste 39, Hanover, NH, 03755. Phone: (802) 526-4810. Providers update this record themselves, so call before visiting.
How can I verify Cassie A. Kosarek, MD's license?
NPPES lists New Hampshire license number 35234, as entered by the provider. Search the New Hampshire Board of Medicine at https://www.oplc.nh.gov/board-medicine. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Cassie A. Kosarek, MD prescribe under Medicare Part D?
In 2024, Cassie A. Kosarek, MD had 33 Medicare Part D claims; the average among psychiatry physician prescribers was 1,000. 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.
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.