Walter Mathis, M.D.
NPI 1083975577 · Psychiatry Physician · New Haven, CT
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Walter Mathis, M.D. is a Psychiatry Physician provider in New Haven, CT (NPI 1083975577).
Provider details
- NPI number
- 1083975577
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 55314 (CT)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
14 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 26 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Clozapine | 82 |
| Benztropine Mesylate | 70 |
| Olanzapine | 69 |
| Topiramate | 45 |
| Lithium Carbonatebrand: Lithium Carbonate Er | 44 |
| Buprenorphine Hcl/Naloxone Hclbrand: Buprenorphine-Naloxone | 43 |
| Quetiapine Fumarate | 43 |
| Bupropion Hclbrand: Bupropion Xl | 43 |
| Divalproex Sodiumbrand: Divalproex Sodium Er |
Practice location
Mailing address
Registry dates
- Enumerated
- 2012-05-31
- Last updated
- 2017-05-25
Frequently asked questions
- What is Walter Mathis's NPI number?
- Walter Mathis's National Provider Identifier (NPI) is 1083975577, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Walter Mathis's specialty?
- Walter Mathis is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Walter Mathis located?
- Walter Mathis's practice location on file with NPPES is 34 Park St, New Haven, CT 06519-1109.
- What is Walter Mathis's phone number?
- The practice phone number listed in the NPPES registry for Walter Mathis is (203) 980-4950.
- Does Walter Mathis accept Medicare?
- Walter Mathis is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Walter Mathis's NPI active?
- Yes — Walter Mathis's NPI (1083975577) is active in the NPPES registry as of the last update on 2017-05-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.