Isaiah W. Chase, M.D.
Psychiatry Physician · New Haven, CT
Isaiah W. Chase, M.D. is a psychiatry physician with a practice address in New Haven, Connecticut, and NPI 1841589363, issued on Apr 5, 2011. Check the license (Connecticut 052204, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Isaiah W. Chase
- Credential
- M.D.
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- 052204 CT
Self-reported in NPPES; status is on the state search - Practice location
- 20 York St # T-209, New Haven, CT 06510
- Phone
- (203) 688-2259
- Enumerated
- Apr 5, 2011
- Record last updated
- Feb 11, 2022
- Fax
- (203) 688-5599
- Medicare enrollment
- Enrolled (PECOS I20170303001208); accepts Medicare assignment
- Medical or professional school
- University Of Rochester School Of Medicine And Dentistry, 2011
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 1,174 in Connecticut → Look up another NPI →
Also registered at 20 York St # T-209
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Isaiah W. Chase in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 052204Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
33% more Medicare Part D claims than the average psychiatry physician in 2024
1,333 Medicare Part D claims for 207 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D. Brand-name drugs were 8% of claims.
Most prescribed
- Lorazepam105 claims
- Clonazepam70 claims
- Escitalopram Oxalate58 claims
- Sertraline Hcl54 claims
- Quetiapine Fumarate51 claims
- Dextroamphetamine-Amphet Er47 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
- Permanente Medical Group IncSan Rafael, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Isaiah W. Chase among 1,174 psychiatry physician records in Connecticut
Isaiah W. Chase, 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 2011, is newer than 67% of them.
- NPI issued2011 · 67% of these records are older, 31% newer
- In a Medicare fileYes · 70% of these records are
- In the CMS Doctors and Clinicians fileYes · 43% of these records are
- Graduated2011 · median 2003 among the 503 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 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
- Eric Berger, MDNew Haven, CT 065101407888746
- Joseph CheckNew Haven, CT 065101023121985
- Paul Desan, MDNew Haven, CT 065101689662686
- Tsilia Glinberg, MDNew Haven, CT 065101497736060
- David Greenfeld, M.D.New Haven, CT 065101851317366
- Frank Ninivaggi, MDNew Haven, CT 065101609880434
- Nancy Olson, M.D.New Haven, CT 065101003832049
- Anna Ostrovskaya, M. D.New Haven, CT 065101073556841
Common questions
What is Isaiah W. Chase, M.D.'s NPI number?
Isaiah W. Chase, M.D.'s National Provider Identifier (NPI) is 1841589363, issued on Apr 5, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Isaiah W. Chase, M.D. located?
The NPPES record lists a practice address at 20 York St # T-209, New Haven, CT, 06510. Phone: (203) 688-2259. Providers update this record themselves, so call before visiting.
How can I verify Isaiah W. Chase, M.D.'s license?
NPPES lists Connecticut license number 052204, 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 Isaiah W. Chase, M.D. prescribe under Medicare Part D?
In 2024, Isaiah W. Chase, M.D. had 1,333 Medicare Part D claims for 207 beneficiaries; 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.