William David Johns, M.D.
Internal Medicine Physician · West Haven, CT
William David Johns, M.D. is an internal medicine physician with a practice address in West Haven, Connecticut, and NPI 1598773160, issued on Aug 3, 2006. Check the license (Connecticut 026668, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- William David Johns
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 026668 CT
Self-reported in NPPES; status is on the state search - Practice location
- 950 Campbell Ave, West Haven, CT 06516
- Phone
- (203) 932-5711
- Enumerated
- Aug 3, 2006
- Record last updated
- May 17, 2016 (not updated in 10 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20110427000782); may accept Medicare assignment
- Medical or professional school
- University Of Connecticut School Of Medicine, 1983
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,623 in Connecticut → Look up another NPI →
Also registered at 950 Campbell Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Matthew Abbott, LCSWSocial Worker1790734986
- Erica Abel, PH.D.Clinical Psychologist1982971222
- Audrey Abelleira, PHARMDPharmacist1831671577
- Mary Abraham, PHARMDPharmacist1386344950
- Linda Accordino, RN, MSNGerontology Nurse Practitioner1396853289
- Jenna Adamowicz, PH.D.Clinical Psychologist1356271266
Verify William David Johns in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 026668Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
31% fewer Medicare Part D claims than the average internal medicine physician in 2024
2,201 Medicare Part D claims for 212 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of claims. 25 claims were for opioids.
Most prescribed
- Atorvastatin Calcium183 claims
- Amlodipine Besylate117 claims
- Metformin Hcl101 claims
- Lisinopril90 claims
- Pantoprazole Sodium84 claims
- Tamsulosin Hcl62 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.
Industry payments in 2024: $39.69
2 payments; by number, the most common kind was food and beverage; the largest payer was Ethicon US, LLC. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Connecticut Institute For Communities IncDanbury, CT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William David Johns among 2,623 internal medicine physician records in Connecticut
William David Johns, M.D. is one of 2,623 internal medicine physician records with a practice address in Connecticut. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 11% of them.
- NPI issued2006 · 11% of these records are older, 52% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1983 · median 2004 among the 1,646 with a school on file
- Record last updated2016 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Connecticut practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
84 internal medicine physician records list a practice address in West Haven
They are 84 of the 1,356 NPPES records with a practice address in West Haven, and 2,623 internal medicine physician records in Connecticut.
All 2,623 in Connecticut → Every provider in West Haven → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Horatiu Balas, M.D.West Haven, CT 065161720084320
- Christine Cheng, MDWest Haven, CT 065161598753980
- Mark Drabinski, M.D.West Haven, CT 065161811992902
- Benedict Fernando, M.D.West Haven, CT 065161932105624
- Glen Gechlik, MDWest Haven, CT 065161710972393
- Jurgen Holleck, M.D.West Haven, CT 065161811964257
- Avlin Imaeda, MDWest Haven, CT 065161851375612
- Laurence Knoll, MDWest Haven, CT 065161003886649
Common questions
What is William David Johns, M.D.'s NPI number?
William David Johns, M.D.'s National Provider Identifier (NPI) is 1598773160, issued on Aug 3, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William David Johns, M.D. located?
The NPPES record lists a practice address at 950 Campbell Ave, West Haven, CT, 06516. Phone: (203) 932-5711. Providers update this record themselves, so call before visiting.
How can I verify William David Johns, M.D.'s license?
NPPES lists Connecticut license number 026668, 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 William David Johns, M.D. prescribe under Medicare Part D?
In 2024, William David Johns, M.D. had 2,201 Medicare Part D claims for 212 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.