Dr. Louis Hammerman, MD
- Medicare services, 2022
- 360
- Part D claims, 2024
- 33
- Hospital affiliations
- 1
- Industry payments
- $6,212
- Medical group
- 1
- Practice address
- 100 Madison Ave, Morristown, NJ 07960
- Practice phone
- Call (610) 331-9446
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Morristown Medical Center
Morristown, New Jersey
Find Dr. Hammerman'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 Hammerman is an internist in Morristown, New Jersey
Dr. Hammerman practices at Morristown Medical Center in Morristown, New Jersey.
Dr. Hammerman's NPI, 1194724310, was assigned on July 19, 2005. Dr. Hammerman graduated from Sidney Kimmel Medical College at Thomas Jefferson University in 1978. Dr. Hammerman holds New Jersey license 25MA03896400.
- NPI
- 1194724310NPI Registry (opens in a new tab)
- NPI enumeration date
- July 19, 2005
- NPI status
- Active
- Practice phone
- (610) 331-9446
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 74
- Medical school graduation
- 1978
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. Louis Hammerman practices at Morristown Medical Center in Morristown, New Jersey
Dr. Hammerman's primary practice is Morristown Medical Center, at 100 Madison Ave, Morristown, NJ 07960 in Morris County. The practice phone is (610) 331-9446.
- Morristown Medical Center100 Madison Ave, Morristown, NJ 07960 · Morris CountyPhone(610) 331-9446
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Louis Hammerman is affiliated with 2 sites of care and 1 medical group
Dr. Hammerman's primary practice is Morristown Medical Center in Morristown, New Jersey. Dr. Hammerman is also affiliated with Saint Clare's Denville Hospital. The medical group on file is Saint Clare's Health.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Louis Hammerman's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Hammerman practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Morristown Medical Center | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Louis Hammerman is one of 4,226 internists in New Jersey
Internal medicine is Dr. Hammerman's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Hammerman is licensed in New Jersey.
Specialties and state licenses
- Internal medicine, New JerseyPrimary
Internists near Dr. Hammerman
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 Hammerman billed Medicare for 360 services in 2022
CMS data shows 360 Medicare services from Dr. Hammerman across 3 procedure codes in 2022. Medicare paid $27,606 for them. Every service was in an office.
Dr. Hammerman's Medicare services by type, 2021 to 2022
- 2021
- 2022
- Office and hospital visits
- 2021: 7092022: 26563%
- Other services
- 2021: 3402022: 9572%
- Tests and treatments
- 2021: 1852022: 0100%
Dr. Hammerman compared with the New Jersey median for internists, 2022
- Dr. Hammerman
- New Jersey median
- Medicare services
- 360vs 72350% below
- Part D claims
- 11vs 83099% below
Medians across 4,086 internists in New Jersey with Dmand AI profiles that report each measure.
Dr. Hammerman's most billed Medicare procedure codes, 2022
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. Hammerman and other internists in New Jersey.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Louis Hammerman's patients have a median age of 65
Across all payers, Dmand AI patient panel data puts Dr. Hammerman's median patient age at 65, with 49% women.
Dr. Hammerman's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 65
Patient panel by sex, all payers
- Women49%
- Men45%
Source: Dmand AI Patient Panel Data
Dr. Louis Hammerman wrote 33 Medicare Part D claims in 2024
In 2024, Dr. Hammerman wrote 33 Medicare Part D claims. 97% of them were for generic drugs. CMS names the drug for 11 of them, across 1 drug with 11 or more claims each, at $251 in total drug cost. In 2023, CMS named 141 claims across 8 drugs.
Dr. Hammerman's Part D claims by kind of drug, 2024
- Generic32 claims97%
- Brand-name and other1 claims3%
Dr. Hammerman'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: 1412024: 1192%
Drugs named by CMS: 1 in 2024, 8 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 Hammerman received $6,212 in industry payments from 2016 to 2022
CMS Open Payments shows 188 general payments to Dr. Hammerman from 27 drug and device companies from 2016 to 2022. Food and beverage make up the largest share, 80% of the total. Biohaven Pharmaceuticals, Inc. paid the most, $1,762.
General payments to Dr. Hammerman by program year, 2016 to 2022
General payments to Dr. Hammerman by kind, 2016 to 2022
- Food and beverage$4,97680%
- Consulting fees$1,20019%
- Education$361%
Companies that paid Dr. Hammerman the most, 2016 to 2022
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Louis Hammerman graduated from Sidney Kimmel Medical College at Thomas Jefferson University
Dr. Hammerman graduated from Sidney Kimmel Medical College at Thomas Jefferson University in 1978.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Louis Hammerman'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 DataDmand AI Org Hierarchy 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 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) |
| 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. Louis Hammerman
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 Hammerman's NPI number?
Dr. Louis Hammerman's NPI number is 1194724310. It was assigned on July 19, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Louis Hammerman?
Dr. Louis Hammerman is an internist in Morristown, New Jersey. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Louis Hammerman practice?
Dr. Hammerman practices at 100 Madison Ave, Morristown, NJ 07960. Dr. Hammerman's primary practice is Morristown Medical Center in Morristown, New Jersey.
What is Dr. Louis Hammerman's office phone number?
The practice phone on file for Dr. Hammerman is (610) 331-9446.
What is Dr. Louis Hammerman's medical license number?
Dr. Hammerman holds New Jersey license 25MA03896400.
Which hospitals is Dr. Louis Hammerman affiliated with?
Dr. Hammerman is affiliated with Saint Clare's Denville Hospital.
What medical group is Dr. Louis Hammerman part of?
Dr. Hammerman is linked to Saint Clare's Health.
Does Dr. Louis Hammerman accept Medicare?
Yes. CMS data shows Dr. Hammerman billed Medicare for 360 services in 2022.
What services does Dr. Louis Hammerman bill to Medicare?
In 2022, Dr. Hammerman's most billed Medicare services were office visit, established patient (99213), medicare service (G0439) and office visit, established patient (99214).
Where did Dr. Louis Hammerman go to medical school?
Dr. Hammerman graduated from Sidney Kimmel Medical College at Thomas Jefferson University in 1978.
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What drugs does Dr. Louis Hammerman prescribe most?
In 2024 Medicare Part D data, Dr. Hammerman's most prescribed drugs by claims were Fluticasone Propionate.
Has Dr. Louis Hammerman received payments from drug or device companies?
CMS Open Payments shows $6,212 in general payments to Dr. Hammerman from 27 companies from 2016 to 2022. The largest total came from Biohaven Pharmaceuticals, Inc.
How long has Dr. Louis Hammerman been practicing?
Dr. Hammerman graduated from medical school in 1978, 48 years ago.
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