Kenneth Michael Marcus, M.D.
Psychiatry Physician · New Haven, CT
Kenneth Michael Marcus, M.D. is a psychiatry physician with a practice address in New Haven, Connecticut, and NPI 1639226566, issued on Jan 4, 2007. Check the license (Connecticut 021420, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Kenneth Michael Marcus
- Credential
- M.D.
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- 021420 CT
Self-reported in NPPES; status is on the state search - Practice location
- 303 Whitney Ave, New Haven, CT 06511
- Phone
- (203) 772-0003
- Enumerated
- Jan 4, 2007
- Record last updated
- Nov 30, 2009 (not updated in 17 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20111110000411); accepts Medicare assignment
- Medical or professional school
- New York University School Of Medicine, 1977
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 1,174 in Connecticut → Look up another NPI →
Also registered at 303 Whitney Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Kenneth Michael Marcus in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 021420Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
84% fewer Medicare Part D claims than the average psychiatry physician in 2024
162 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 9% of claims.
Most prescribed
- Clonazepam38 claims
- Olanzapine21 claims
- Fluvoxamine Maleate13 claims
- Dextroamphetamine-Amphetamine11 claims
- Methylphenidate Er11 claims
- Risperidone11 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.
Kenneth Michael Marcus among 1,174 psychiatry physician records in Connecticut
Kenneth Michael Marcus, M.D. is one of 1,174 psychiatry physician records with a practice address in Connecticut. 70% 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 40% of them.
- NPI issued2007 · 40% of these records are older, 44% newer
- In a Medicare fileYes · 70% of these records are
- In the CMS Doctors and Clinicians fileYes · 43% of these records are
- Graduated1977 · median 2003 among the 503 with a school on file
- Record last updated2009 · 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 2084P0800X and a Connecticut practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
285 psychiatry physician records list a practice address in New Haven
They are 285 of the 9,793 NPPES records with a practice address in New Haven, and 1,174 psychiatry physician records in Connecticut.
All 1,174 in Connecticut → Every provider in New Haven → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Erica Ahlert, MDNew Haven, CT 065111750479481
- Hilary Blumberg, M.D.New Haven, CT 065111679511299
- Michael Groner, M. D.New Haven, CT 065111316973134
- Jeffry Klugman, MDNew Haven, CT 065111225023203
- Helen Lankenau, M.D.New Haven, CT 065111215016639
- Gale Levin, M.D.New Haven, CT 065111679508469
- Keith Pearlman, MDNew Haven, CT 065111588622088
- Stanley Possick, MDNew Haven, CT 065111366478315
Common questions
What is Kenneth Michael Marcus, M.D.'s NPI number?
Kenneth Michael Marcus, M.D.'s National Provider Identifier (NPI) is 1639226566, issued on Jan 4, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Kenneth Michael Marcus, M.D. located?
The NPPES record lists a practice address at 303 Whitney Ave, New Haven, CT, 06511. Phone: (203) 772-0003. Providers update this record themselves, so call before visiting.
How can I verify Kenneth Michael Marcus, M.D.'s license?
NPPES lists Connecticut license number 021420, 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 Kenneth Michael Marcus, M.D. prescribe under Medicare Part D?
In 2024, Kenneth Michael Marcus, M.D. had 162 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.