William S. Kritzberg, M.D.
Internal Medicine Physician · Livingston, NJ
William S. Kritzberg, M.D. is an internal medicine physician with a practice address in Livingston, New Jersey, and NPI 1780725010, issued on Feb 9, 2007. Check the license (New Jersey 25MA06514200, as entered in NPPES) on the New Jersey State Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- William S. Kritzberg
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 25MA06514200 NJ
Self-reported in NPPES; status is on the state search - Practice location
- 315 E Northfield RD, Livingston, NJ 07039
- Phone
- (973) 944-1144
- Enumerated
- Feb 9, 2007
- Record last updated
- Sep 19, 2013 (not updated in 13 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 4,632 in New Jersey → Look up another NPI →
Also registered at 315 E Northfield RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Pamela Babik, LSWClinical Social Worker1265874416
- Robert Bagoff, DMD, FAGDGeneral Practice Dentistry1053467878
- Sherry Barron-Seabrook, M.D.Child & Adolescent Psychiatry Physician1043311129
- Stuart Baskin, M.D.Nephrology Physician1043240104
- Julie BentonGerontology Nurse Practitioner1356533970
- Allison BerryClinical Social Worker1982093605
Verify William S. Kritzberg in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNew Jersey State Board of Medical Examiners
Search for license 25MA06514200Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
100% fewer Medicare Part D claims than the average internal medicine physician in 2024
14 Medicare Part D claims, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of 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.
William S. Kritzberg among 4,632 internal medicine physician records in New Jersey
William S. Kritzberg, M.D. is one of 4,632 internal medicine physician records with a practice address in New Jersey. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 50% of them.
- NPI issued2007 · 50% of these records are older, 41% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileNo · 68% of these records are
- Record last updated2013 · 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 207R00000X and a New Jersey practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
66 internal medicine physician records list a practice address in Livingston
They are 66 of the 1,714 NPPES records with a practice address in Livingston, and 4,632 internal medicine physician records in New Jersey.
All 4,632 in New Jersey → Every provider in Livingston → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Nael Abutabikh, MDLivingston, NJ 070391235120155
- Donna Adamoli, M.D.Livingston, NJ 070391104880871
- Shrey Desai, M.D.Livingston, NJ 070391083651392
- Joseph Follo, MDLivingston, NJ 070391003874397
- Jacquelin Holubka, M.D.Livingston, NJ 070391174577373
- Eileen Klein, MDLivingston, NJ 070391336141928
- Kevin Leen, MDLivingston, NJ 070391699729293
- Liang Liang, M.D.Livingston, NJ 070391437132602
Common questions
What is William S. Kritzberg, M.D.'s NPI number?
William S. Kritzberg, M.D.'s National Provider Identifier (NPI) is 1780725010, issued on Feb 9, 2007. An NPI identifies a provider in billing; it is not a license.
Where is William S. Kritzberg, M.D. located?
The NPPES record lists a practice address at 315 E Northfield RD, Livingston, NJ, 07039. Phone: (973) 944-1144. Providers update this record themselves, so call before visiting.
How can I verify William S. Kritzberg, M.D.'s license?
NPPES lists New Jersey license number 25MA06514200, as entered by the provider. Search the New Jersey State Board of Medical Examiners at https://newjersey.mylicense.com/verification/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does William S. Kritzberg, M.D. prescribe under Medicare Part D?
In 2024, William S. Kritzberg, M.D. had 14 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.