William Johns, M.D.
NPI 1598773160 · Internal Medicine Physician · West Haven, CT
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Johns, M.D. is a Internal Medicine Physician provider in West Haven, CT (NPI 1598773160).
Provider details
- NPI number
- 1598773160
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 026668 (CT)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
19 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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 · 51 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 183 | 59 |
| Amlodipine Besylate | 117 | 42 |
| Metformin Hcl | 101 | 34 |
| Lisinopril | 90 | 31 |
| Pantoprazole Sodium | 84 | 27 |
| Tamsulosin Hcl | 62 | 24 |
| Levothyroxine Sodium |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$40 across 2 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-08-03
- Last updated
- 2016-05-17
Frequently asked questions
- What is William Johns's NPI number?
- William Johns's National Provider Identifier (NPI) is 1598773160, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Johns's specialty?
- William Johns is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is William Johns located?
- William Johns's practice location on file with NPPES is 950 Campbell Ave, West Haven, CT 06516-2770.
- What is William Johns's phone number?
- The practice phone number listed in the NPPES registry for William Johns is (203) 932-5711.
- Does William Johns accept Medicare?
- William Johns is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Johns's NPI active?
- Yes — William Johns's NPI (1598773160) is active in the NPPES registry as of the last update on 2016-05-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.