Warren M. Klein, M.D.
Ophthalmology Physician · Elizabeth, NJ
Warren M. Klein, M.D. is an ophthalmology physician with a practice address in Elizabeth, New Jersey, and NPI 1114912342, issued on Sep 14, 2005. Check the license (New Jersey 027381, as entered in NPPES) on the New Jersey State Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Warren M. Klein
- Credential
- M.D.
- Primary taxonomy
- Ophthalmology Physician 207W00000X
- License number
- 027381 NJ
Self-reported in NPPES; status is on the state search - Practice location
- 230 W Jersey St FL 2, Elizabeth, NJ 07202
- Phone
- (908) 289-1166
- Enumerated
- Sep 14, 2005
- Record last updated
- Jun 11, 2025
- Fax
- (908) 352-4752
- Medicaid ID
- 0701106 NJ
- Medicare enrollment
- Enrolled (PECOS I20050823000997); may accept Medicare assignment
- Medical or professional school
- Rutgers New Jersey Medical School, 1972
- Entity
- Type 1 · individual
8 nearest ophthalmology physician records → All 631 in New Jersey → Look up another NPI →
Also registered at 230 W Jersey St FL 2
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Mark Gordon, O.D.Optometrist1891869202
Verify Warren M. Klein 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 027381Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.9 times the Medicare Part D claims of the average ophthalmology physician in 2024
4,428 Medicare Part D claims for 859 beneficiaries, against an average of 1,518 among the 16,459 providers of this specialty who prescribed in Part D. Brand-name drugs were 39% of claims.
Most prescribed
- Fluorometholone1,001 claims
- Latanoprost515 claims
- Brimonidine Tartrate500 claims
- Timolol Maleate489 claims
- Prednisolone Acetate303 claims
- Dorzolamide Hcl266 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.
No measured MIPS final score for 2023
CMS assigned the neutral MIPS final score of 75 without scoring Quality, Cost, Promoting Interoperability or Improvement Activities. It is an administrative threshold, so PlainDoctor does not compare it with measured clinicians.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $98.78
6 payments; by number, the most common kind was food and beverage; the largest payer was Tarsus Pharmaceuticals, Inc. The 13,221 providers of this specialty with any payment received $4,535.02 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 2 group practices
- Klein And Scannapiego, MD., PAElizabeth, NJ
- Paterson Eye AssociatesPaterson, NJ
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Warren M. Klein among 631 ophthalmology physician records in New Jersey
Warren M. Klein, M.D. is one of 631 ophthalmology physician records with a practice address in New Jersey. 85% 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, 82% newer
- In a Medicare fileYes · 85% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated1972 · median 1993 among the 454 with a school on file
- Record last updated2025 · 69% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207W00000X and a New Jersey practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Ophthalmology Physician providers in New Jersey
There are 631 ophthalmology physician records in New Jersey.
All 631 in New Jersey → Every provider in Elizabeth → Ophthalmology Physician nationwide →
The 8 ophthalmology physician records with the nearest ZIP codes
- Shawn Klein, MDElizabeth, NJ 072021982690574
- Saveren ScannapiegoElizabeth, NJ 072021346236668
- Michael Friedman, MDRoselle Park, NJ 072041942208632
- Atul Agarwala, MDIrvington, NJ 071111427133586
- Nahndi Bush, M.D.Irvington, NJ 071111568504280
- Philip Fiore, MDNutley, NJ 071101306826581
- Ligaya Prystowsky, M.D.Nutley, NJ 071101821071754
- Albert Zazzali, MDNutley, NJ 071101942318126
Common questions
What is Warren M. Klein, M.D.'s NPI number?
Warren M. Klein, M.D.'s National Provider Identifier (NPI) is 1114912342, issued on Sep 14, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Warren M. Klein, M.D. located?
The NPPES record lists a practice address at 230 W Jersey St FL 2, Elizabeth, NJ, 07202. Phone: (908) 289-1166. Providers update this record themselves, so call before visiting.
How can I verify Warren M. Klein, M.D.'s license?
NPPES lists New Jersey license number 027381, 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 Warren M. Klein, M.D. prescribe under Medicare Part D?
In 2024, Warren M. Klein, M.D. had 4,428 Medicare Part D claims for 859 beneficiaries; the average among ophthalmology physician prescribers was 1,518. Part D covers Medicare prescriptions only.
What is Warren M. Klein, M.D.'s MIPS final score?
CMS assigned the neutral MIPS final score of 75 for 2023 without scoring any category, so it is not a measured result.
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.