Jonathan Horowitz, M.D.
Psychiatry Physician · Westport, CT
Jonathan Horowitz, M.D. is a psychiatry physician with a practice address in Westport, Connecticut, and NPI 1174500185, issued on Dec 30, 2005. Check the license (Connecticut 048165, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Jonathan Horowitz
- Credential
- M.D.
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- 048165 CT
Self-reported in NPPES; status is on the state search - Practice location
- 840 Post RD E, Westport, CT 06880
- Phone
- (203) 993-0024
- Enumerated
- Dec 30, 2005
- Entity
- Type 1 · individual
Also registered at 840 Post RD E
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Abby Adis, MSWClinical Social Worker1003842105
- Alexandra Grundy, LCSWClinical Social Worker1245094366
- Jessica Halmeck, LCSWClinical Social Worker1043966617
- Jacqueline Katz, LCSWClinical Social Worker1700493467
- Allyson Maida, LCSWClinical Social Worker1386201358
- Colleen Maloney, LCSWClinical Social Worker1356042931
Verify Jonathan Horowitz in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 048165Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
92% fewer Medicare Part D claims than the average psychiatry physician in 2024
84 Medicare Part D claims, against an average of 1,010 among the 32,287 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Most prescribed
- Clonazepam21 claims
- Gabapentin14 claims
- Bupropion Xl11 claims
- Citalopram Hbr11 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.
39 psychiatry physician records list a Westport practice address
They are 39 of the 886 NPPES records with a Westport practice address, and 1,096 psychiatry physician records in Connecticut.
All 39 in Westport → All 1,096 in Connecticut → Every provider in Westport →
Other psychiatry physician records in Connecticut
- Enenge A'Bodjedi, MDStamford, CT1952310666
- Chadi Abdallah, M.D.West Haven, CT1851591820
- Sarah AbdallahNew Haven, CT1740800952
- Elie AbdelnourNew Haven, CT1790346070
- Jessica Abellard, PSYCHIATRISTNew Haven, CT1881906139
- Irene Abramovich, M.D.West Hartford, CT1407864887
- Linus Abrams, M.D.Greenwich, CT1073675922
- Tia Maria Acosta, M.D.Willimantic, CT1679582167
- Bellanirys Acosta Arias, MDNew Haven, CT1063040293
- Michael Adusei, M.D.Stamford, CT1043560287
Common questions
What is Jonathan Horowitz, M.D.'s NPI number?
Jonathan Horowitz, M.D.'s National Provider Identifier (NPI) is 1174500185, issued on Dec 30, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Jonathan Horowitz, M.D. located?
The NPPES record lists a practice address at 840 Post RD E, Westport, CT, 06880. Phone: (203) 993-0024. Providers update this record themselves, so call before visiting.
How can I verify Jonathan Horowitz, M.D.'s license?
NPPES lists Connecticut license number 048165, as entered by the provider. Search the Connecticut Medical Examining Board at https://www.elicense.ct.gov/Lookup/LicenseLookup.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Jonathan Horowitz, M.D. prescribe under Medicare Part D?
In 2024, Jonathan Horowitz, M.D. had 84 Medicare Part D claims; the average among psychiatry physician prescribers was 1,010. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.