Dr. Warren M. Klein, MD
- Medicare services, 2024
- 1,008
- Medicare patients, 2024
- 200
- Part D claims, 2024
- 4,428
- Industry payments
- $722
- Affiliated sites
- 2
- Practice address
- 230 W Jersey St, Elizabeth, NJ 07202
- Practice phone
- Call (908) 289-1166
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Klein & Scannapiego, MD., PA
Elizabeth, New Jersey
Find Dr. Klein's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Warren M. Klein is an ophthalmologist in Elizabeth, New Jersey
Dr. Klein practices at Klein & Scannapiego, MD., PA in Elizabeth, New Jersey.
Dr. Klein's NPI, 1114912342, was assigned on September 14, 2005. Dr. Klein graduated from Rutgers New Jersey Medical School in 1972. Dr. Klein holds New Jersey license 027381.
- NPI
- 1114912342NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5991736589
- NPI enumeration date
- September 14, 2005
- NPI status
- Active
- Practice phone
- (908) 289-1166
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 80
- Medical school graduation
- 1972
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. Warren M. Klein practices at Klein & Scannapiego, MD., PA in Elizabeth, New Jersey
Dr. Klein's primary practice is Klein & Scannapiego, MD., PA, at 230 W Jersey St, Elizabeth, NJ 07202 in Union County. The practice phone is (908) 289-1166.
- Klein & Scannapiego, MD., PA230 W Jersey St, Elizabeth, NJ 07202 · Union CountyPhone(908) 289-1166
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Warren M. Klein is affiliated with 3 sites of care and 2 medical groups
Dr. Klein's primary practice is Klein & Scannapiego, MD., PA in Elizabeth, New Jersey. Dmand AI also links Dr. Klein to 2 group practices and clinics and 2 medical groups, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Warren M. Klein's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Klein practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Klein & Scannapiego, MD., PA | Available with a free account |
| +2 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Warren M. Klein is one of 654 ophthalmologists in New Jersey
Ophthalmology is Dr. Klein's primary specialty in the NPI Registry, under taxonomy code 207W00000X. Dr. Klein is licensed in New Jersey.
Specialties and state licenses
- Ophthalmology, New JerseyPrimary
Ophthalmologists near Dr. Klein
Counts of ophthalmologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Warren M. Klein billed Medicare for 1,008 services in 2024
CMS data shows 1,008 Medicare services from Dr. Klein across 19 procedure codes in 2024, for 200 Medicare patients. Medicare paid $61,087 for them. Every service was in an office.
Dr. Klein's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Tests and treatments
- 2023: 1,4732024: 87541%
- Surgery
- 2023: 1652024: 6262%
- Imaging
- 2023: 972024: 5543%
- Office and hospital visits
- 2023: 02024: 16
Dr. Klein compared with the New Jersey median for ophthalmologists, 2024
- Dr. Klein
- New Jersey median
- Medicare services
- 1,008vs 1,84645% below
- Medicare patients
- 200vs 61868% below
- Part D claims
- 4,274vs 6966.1 times
Medians across 677 ophthalmologists in New Jersey with Dmand AI profiles that report each measure.
Dr. Klein's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Klein and other ophthalmologists in New Jersey.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Warren M. Klein treated 200 Medicare patients in 2024, average age 74
CMS counts 200 Medicare patients who saw Dr. Klein in 2024. The largest group is 65 to 74, with 86 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 54% are also on Medicaid. Their average risk score is 1.43, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Klein's median patient age at 69, with 56% women.
Dr. Klein's Medicare patients by age, 2024
Dr. Klein's Medicare patients by sex, 2024
- Women13065%
- Men7035%
Chronic conditions among Dr. Klein's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Diabetes54%
- Arthritis48%
- Ischemic heart disease30%
- Chronic kidney disease25%
- Anxiety22%
- Osteoporosis21%
Share of Medicare patients with each condition. A patient can have several.
Dr. Klein's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 69
Patient panel by sex, all payers
- Women56%
- Men41%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Warren M. Klein wrote 4,428 Medicare Part D claims in 2024
In 2024, Dr. Klein wrote 4,428 Medicare Part D claims for 859 patients. 61% of them were for generic drugs. CMS names the drug for 4,274 of them, across 28 drugs with 11 or more claims each, at $403,672 in total drug cost. In 2023, CMS named 4,625 claims across 33 drugs.
Dr. Klein's Part D claims by kind of drug, 2024
- Generic2,710 claims61%
- Brand-name1,718 claims39%
Dr. Klein's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 4,6252024: 4,2748%
Drugs named by CMS: 28 in 2024, 33 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. Warren M. Klein takes part in Medicare
Cataract surgery: 1 to 10 procedures (CMS shows small counts as a range)
Source: Doctors and Clinicians Utilization Data (CMS)
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Dr. Warren M. Klein received $722 in industry payments from 2016 to 2025
CMS Open Payments shows 38 general payments to Dr. Klein from 16 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 95% of the total. Bausch & Lomb Americas Inc. paid the most, $115.
General payments to Dr. Klein by program year, 2016 to 2025
General payments to Dr. Klein by kind, 2016 to 2025
- Food and beverage$68495%
- Education$385%
Companies that paid Dr. Klein the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Warren M. Klein graduated from Rutgers New Jersey Medical School
Dr. Klein graduated from Rutgers New Jersey Medical School in 1972.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Warren M. Klein's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Warren M. Klein
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Warren M. Klein's NPI number?
Dr. Warren M. Klein's NPI number is 1114912342. It was assigned on September 14, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Warren M. Klein?
Dr. Warren M. Klein is an ophthalmologist in Elizabeth, New Jersey. The primary specialty in the NPI Registry is Ophthalmology Physician (taxonomy code 207W00000X).
Where does Dr. Warren M. Klein practice?
Dr. Klein practices at 230 W Jersey St, Elizabeth, NJ 07202. Dr. Klein's primary practice is Klein & Scannapiego, MD., PA in Elizabeth, New Jersey. Dmand AI also links Dr. Klein to 2 group practices and clinics and 2 medical groups.
What is Dr. Warren M. Klein's office phone number?
The practice phone on file for Dr. Klein is (908) 289-1166.
What is Dr. Warren M. Klein's medical license number?
Dr. Klein holds New Jersey license 027381.
Does Dr. Warren M. Klein accept Medicare?
Yes. CMS data shows Dr. Klein billed Medicare for 1,008 services in 2024.
How many Medicare patients does Dr. Warren M. Klein see?
CMS counts 200 Medicare patients who saw Dr. Klein in 2024, with an average age of 74.
What services does Dr. Warren M. Klein bill to Medicare?
In 2024, Dr. Klein's most billed Medicare services were eye exam or test (92250), eye exam or test (92020) and eye exam or test (92012).
Where did Dr. Warren M. Klein go to medical school?
Dr. Klein graduated from Rutgers New Jersey Medical School in 1972.
What drugs does Dr. Warren M. Klein prescribe most?
In 2024 Medicare Part D data, Dr. Klein's most prescribed drugs by claims were Fluorometholone, Latanoprost and Brimonidine Tartrate.
Has Dr. Warren M. Klein received payments from drug or device companies?
CMS Open Payments shows $722 in general payments to Dr. Klein from 16 companies from 2016 to 2025. The largest total came from Bausch & Lomb Americas Inc.
How long has Dr. Warren M. Klein been practicing?
Dr. Klein graduated from medical school in 1972, 54 years ago.
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