Irwin Howard Berkowitz, M.D.
Pediatrics Physician · Woodcliff Lake, NJ
Irwin Howard Berkowitz, M.D. is a pediatrics physician with a practice address in Woodcliff Lake, New Jersey, and NPI 1538106158, issued on Jun 1, 2006. Check the license (New Jersey 25MA03143400, as entered in NPPES) on the New Jersey State Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Irwin Howard Berkowitz
- Credential
- M.D.
- Primary taxonomy
- Pediatrics Physician 208000000X
- License number
- 25MA03143400 NJ
Self-reported in NPPES; status is on the state search - Practice location
- 595 Chestnut Ridge RD, Woodcliff Lake, NJ 07677
- Phone
- (201) 391-2020
- Enumerated
- Jun 1, 2006
- Record last updated
- Jul 13, 2026
- Fax
- (201) 391-0265
- Entity
- Type 1 · individual
Also registered at 595 Chestnut Ridge RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Irwin Howard Berkowitz 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 25MA03143400Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
97% fewer Medicare Part D claims than the average pediatrics physician in 2024
11 Medicare Part D claims, against an average of 375 among the 5,609 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.
5 pediatrics physician records list a practice address in Woodcliff Lake
They are 5 of the 137 NPPES records with a practice address in Woodcliff Lake, and 2,181 pediatrics physician records in New Jersey.
All 5 in Woodcliff Lake → All 2,181 in New Jersey → Every provider in Woodcliff Lake →
Other pediatrics physician records in New Jersey
- Saeed Abbassi, MDNorth Bergen, NJ1114926664
- Yousef Abdulmasih, M.D.Totowa, NJ1942221205
- Jane Abels, MDWestfield, NJ1275825887
- Samantha Abend, DOSparta, NJ1104322528
- Daniel Abraham, M.D.Warren, NJ1861436867
- Rayna AbrahamBlackwood, NJ1275275554
- Wafa Abukhraybeh, M.D.Wayne, NJ1093763856
- Chidi Achebe, M.D.Newark, NJ1841558806
- Karen AcquahWest Orange, NJ1790435030
- Mojisola Adaramola, MDWest Caldwell, NJ1821286436
Common questions
What is Irwin Howard Berkowitz, M.D.'s NPI number?
Irwin Howard Berkowitz, M.D.'s National Provider Identifier (NPI) is 1538106158, issued on Jun 1, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Irwin Howard Berkowitz, M.D. located?
The NPPES record lists a practice address at 595 Chestnut Ridge RD, Woodcliff Lake, NJ, 07677. Phone: (201) 391-2020. Providers update this record themselves, so call before visiting.
How can I verify Irwin Howard Berkowitz, M.D.'s license?
NPPES lists New Jersey license number 25MA03143400, 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 Irwin Howard Berkowitz, M.D. prescribe under Medicare Part D?
In 2024, Irwin Howard Berkowitz, M.D. had 11 Medicare Part D claims; the average among pediatrics physician prescribers was 375. 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.