Walter Stanley Mathis, M.D.
Psychiatry Physician · New Haven, CT
Walter Stanley Mathis, M.D. is a psychiatry physician with a practice address in New Haven, Connecticut, and NPI 1083975577, issued on May 31, 2012. Check the license (Connecticut 55314, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Walter Stanley Mathis
- Credential
- M.D.
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- 55314 CT
Self-reported in NPPES; status is on the state search - Practice location
- 34 Park St, New Haven, CT 06519
- Phone
- (203) 980-4950
- Enumerated
- May 31, 2012
- Record last updated
- May 25, 2017 (not updated in 9 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20170619002602); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 1,174 in Connecticut → Look up another NPI →
Also registered at 34 Park St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Raina AggarwalStudent in an Organized Health Care Education/Training Program1154852374
- Mayra Aguirre, LCSWClinical Social Worker1326424938
- Edna Aklin, LCSWClinical Social Worker1407905805
- Milania Al-Jammaly, M.D.Psychiatry Physician1851704969
- Areej Ali, MDInternal Medicine Physician1629654629
- Margaret Allende, DNSC APRNClinical Nurse Specialist1386709756
Verify Walter Stanley Mathis in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 55314Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
16% fewer Medicare Part D claims than the average psychiatry physician in 2024
841 Medicare Part D claims for 17 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D. Brand-name drugs were 4% of claims.
Most prescribed
- Clozapine82 claims
- Benztropine Mesylate70 claims
- Olanzapine69 claims
- Topiramate45 claims
- Lithium Carbonate Er44 claims
- Buprenorphine-Naloxone43 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
- State OF ConnecticutNew Haven, CT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Walter Stanley Mathis among 1,174 psychiatry physician records in Connecticut
Walter Stanley Mathis, 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 2012, is newer than 69% of them.
- NPI issued2012 · 69% of these records are older, 29% newer
- In a Medicare fileYes · 70% of these records are
- In the CMS Doctors and Clinicians fileYes · 43% of these records are
- Graduated2012 · median 2003 among the 503 with a school on file
- Record last updated2017 · 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
- Orna Alpert, MDNew Haven, CT 065191164466769
- Roger Ayres, M.D.New Haven, CT 065191013975945
- Robert Beech, MDNew Haven, CT 065191821079195
- Zubin Bhagwagar, MD, PHDNew Haven, CT 065191245294867
- Caroline Dumont, MDNew Haven, CT 065191316910441
- Leslie Jacobsen, M.D.New Haven, CT 065191033135835
- Joanne Kurt, MDNew Haven, CT 065191093796872
- Sabina Lim, MDNew Haven, CT 065191851372429
Common questions
What is Walter Stanley Mathis, M.D.'s NPI number?
Walter Stanley Mathis, M.D.'s National Provider Identifier (NPI) is 1083975577, issued on May 31, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Walter Stanley Mathis, M.D. located?
The NPPES record lists a practice address at 34 Park St, New Haven, CT, 06519. Phone: (203) 980-4950. Providers update this record themselves, so call before visiting.
How can I verify Walter Stanley Mathis, M.D.'s license?
NPPES lists Connecticut license number 55314, 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 Walter Stanley Mathis, M.D. prescribe under Medicare Part D?
In 2024, Walter Stanley Mathis, M.D. had 841 Medicare Part D claims for 17 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.