Walter N. Kernan, MD
Internal Medicine Physician · New Haven, CT
Walter N. Kernan, MD is an internal medicine physician with a practice address in New Haven, Connecticut, and NPI 1710960935, issued on Nov 22, 2005. Check the license (Connecticut 28405, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Walter N. Kernan
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- 28405 CT
028405 CT
Self-reported in NPPES; status is on the state search - Practice location
- 789 Howard Ave, New Haven, CT 06519
- Phone
- (203) 688-2471
- Enumerated
- Nov 22, 2005
- Record last updated
- Jan 23, 2022
- Fax
- (203) 688-4516
- Medicaid ID
- 001284059 CT
- Medicare enrollment
- Enrolled (PECOS I20100324000380); accepts Medicare assignment
- Medical or professional school
- Geisel School Of Medicine At Dartmouth, 1984
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,623 in Connecticut → Look up another NPI →
Also registered at 789 Howard Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Walter N. Kernan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 28405Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average internal medicine physician in 2024
16 Medicare Part D claims, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
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
- Cornell Scott Hill Health CorporationNew Haven, CT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Walter N. Kernan among 2,623 internal medicine physician records in Connecticut
Walter N. Kernan, MD 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 89% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1984 · median 2004 among the 1,646 with a school on file
- Record last updated2022 · 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).
329 internal medicine physician records list a practice address in New Haven
They are 329 of the 9,793 NPPES records with a practice address in New Haven, and 2,623 internal medicine physician records in Connecticut.
All 2,623 in Connecticut → Every provider in New Haven → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
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- Sarwat Chaudhry, MDNew Haven, CT 065191225011448
- Matthew Ellman, MDNew Haven, CT 065191215919642
- David Fiellin, MDNew Haven, CT 065191194700666
- Joanne Foodim, MDNew Haven, CT 065191780663237
- Sally Haskell, MDNew Haven, CT 065191336119411
- Janet Henrich, MDNew Haven, CT 065191679556807
Common questions
What is Walter N. Kernan, MD's NPI number?
Walter N. Kernan, MD's National Provider Identifier (NPI) is 1710960935, issued on Nov 22, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Walter N. Kernan, MD located?
The NPPES record lists a practice address at 789 Howard Ave, New Haven, CT, 06519. Phone: (203) 688-2471. Providers update this record themselves, so call before visiting.
How can I verify Walter N. Kernan, MD's license?
NPPES lists Connecticut license number 28405, 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 N. Kernan, MD prescribe under Medicare Part D?
In 2024, Walter N. Kernan, MD had 16 Medicare Part D claims; 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.