Dr. Louis A. Katz, MD
- Part D claims, 2024
- 518
- Industry payments
- $2,279
- State licenses
- 2
- Year NPI issued
- 2007
- Practice address
- 100 E 77th St, New York, NY 10075
- Practice phone
- Call (212) 434-2842
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Lenox Hill Hospital
New York, New York
Find Dr. Katz'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. Louis A. Katz is an internist in New York, New York
Dr. Katz practices at Lenox Hill Hospital in New York, New York.
Dr. Katz's NPI, 1437207503, was assigned on January 8, 2007. Dr. Katz holds New York license 138140.
- NPI
- 1437207503NPI Registry (opens in a new tab)
- NPI enumeration date
- January 8, 2007
- NPI status
- Active
- Practice phone
- (212) 434-2842
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 77
- Medical school graduation
- 1975
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. Louis A. Katz practices at Lenox Hill Hospital in New York, New York
Dr. Katz's primary practice is Lenox Hill Hospital, at 100 E 77th St, New York, NY 10075 in New York County. The practice phone is (212) 434-2842.
- Lenox Hill Hospital100 E 77th St, New York, NY 10075 · New York CountyPhone(212) 434-2842
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Louis A. Katz is affiliated with 1 site of care
Dr. Katz's primary practice is Lenox Hill Hospital in New York, New York.
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dmand AI tracks the EHR system at Dr. Louis A. Katz's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Katz practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Lenox Hill Hospital | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Louis A. Katz is one of 9,643 internists in New York
Internal medicine is Dr. Katz's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dmand AI has Dr. Katz's licenses on file in 2 states: New York and New Jersey.
Specialties and state licenses
- Internal medicine, New YorkPrimary
- New Jersey license
Internists near Dr. Katz
Counts of internists 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. Louis A. Katz's patients have a median age of 60
Across all payers, Dmand AI patient panel data puts Dr. Katz's median patient age at 60, with 42% women.
Dr. Katz's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 60
Patient panel by sex, all payers
- Women42%
- Men53%
Source: Dmand AI Patient Panel Data
Dr. Louis A. Katz wrote 518 Medicare Part D claims in 2024
In 2024, Dr. Katz wrote 518 Medicare Part D claims for 39 patients. 87% of them were for generic drugs. CMS names the drug for 236 of them, across 12 drugs with 11 or more claims each, at $40,911 in total drug cost. In 2023, CMS named 263 claims across 17 drugs.
Dr. Katz's Part D claims by kind of drug, 2024
- Generic449 claims87%
- Brand-name and other69 claims13%
Dr. Katz'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.
Drug classes CMS tracks in Dr. Katz's Part D claims, 2024
- Antibiotics7%34 of 518 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 2632024: 23610%
Drugs named by CMS: 12 in 2024, 17 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
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Dr. Louis A. Katz received $2,279 in industry payments from 2016 to 2025
CMS Open Payments shows 86 general payments to Dr. Katz from 17 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 95% of the total. AstraZeneca Pharmaceuticals LP paid the most, $890.
General payments to Dr. Katz by program year, 2016 to 2025
General payments to Dr. Katz by kind, 2016 to 2025
- Food and beverage$2,15995%
- Education$1205%
Companies that paid Dr. Katz the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Louis A. Katz'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 Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| 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) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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. Louis A. Katz
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. Louis A. Katz's NPI number?
Dr. Louis A. Katz's NPI number is 1437207503. It was assigned on January 8, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Louis A. Katz?
Dr. Louis A. Katz is an internist in New York, New York. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Louis A. Katz practice?
Dr. Katz practices at 100 E 77th St, New York, NY 10075. Dr. Katz's primary practice is Lenox Hill Hospital in New York, New York.
What is Dr. Louis A. Katz's office phone number?
The practice phone on file for Dr. Katz is (212) 434-2842.
What is Dr. Louis A. Katz's medical license number?
Dr. Katz holds New York license 138140, one of the licenses on file in 2 states.
Which states has Dr. Louis A. Katz been licensed in?
Dmand AI has state licenses on file for Dr. Katz in New York and New Jersey.
What drugs does Dr. Louis A. Katz prescribe most?
In 2024 Medicare Part D data, Dr. Katz's most prescribed drugs by claims were Levothyroxine Sodium, Ozempic and Atorvastatin Calcium.
Has Dr. Louis A. Katz received payments from drug or device companies?
CMS Open Payments shows $2,279 in general payments to Dr. Katz from 17 companies from 2016 to 2025. The largest total came from AstraZeneca Pharmaceuticals LP.
How long has Dr. Louis A. Katz been practicing?
Dr. Katz graduated from medical school in 1975, 51 years ago.
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