Dr. Mark S. Lowenheim, MD
- Hospital affiliations
- 1
- Industry payments
- $2,476
- Medical groups
- 2
- Insurance carriers
- 11
- State licenses
- 2
- Practice address
- 200 Belle Terre Road, Port Jefferson, NY 11777
- Practice phone
- Call (631) 474-6000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find Dr. Lowenheim'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. Mark S. Lowenheim is a pediatric gastroenterology physician in Port Jefferson, New York
Dr. Lowenheim practices at Good Samaritan University Hospital St. Charles Campus in Port Jefferson, New York, part of Diocese of Rockville Centre.
Dr. Lowenheim's NPI, 1285676429, was assigned on June 12, 2006. Dr. Lowenheim graduated from Ross University School of Medicine in 1984. Dr. Lowenheim holds New York license 170700.
- NPI
- 1285676429NPI Registry (opens in a new tab)
- NPI enumeration date
- June 12, 2006
- NPI status
- Active
- Practice phone
- (631) 474-6000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 68
- Medical school graduation
- 1984
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Mark S. Lowenheim practices at Good Samaritan University Hospital St. Charles Campus in Port Jefferson, New York
Dr. Lowenheim's primary practice is Good Samaritan University Hospital St. Charles Campus, at 200 Belle Terre Road, Port Jefferson, NY 11777 in Suffolk County. The practice phone is (631) 474-6000.
- Good Samaritan University Hospital St. Charles Campus200 Belle Terre Road, Port Jefferson, NY 11777 · Suffolk CountyPhone(631) 474-6000
Source: Dmand AI Affiliation Data
Dr. Mark S. Lowenheim is affiliated with 2 sites of care and 2 medical groups
Dr. Lowenheim's primary practice is Good Samaritan University Hospital St. Charles Campus in Port Jefferson, New York, part of Diocese of Rockville Centre. The medical group on file is Good Samaritan University Hospital. Dmand AI also links Dr. Lowenheim to 1 more physician office and 1 medical group, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Mark S. Lowenheim's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Lowenheim practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Good Samaritan University Hospital St. Charles Campus | Available with a free account |
| +1 more site and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Diocese of Rockville Centre and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Mark S. Lowenheim is one of 158 pediatric gastroenterology physicians in New York
Pediatric gastroenterology is Dr. Lowenheim's primary specialty in the NPI Registry, under taxonomy code 2080P0206X. Dmand AI has Dr. Lowenheim's licenses on file in 2 states: New York and New Jersey.
Specialties and state licenses
- Pediatric gastroenterology, New YorkPrimary
- New Jersey license
Clinical focus
Dmand AI lists irritable bowel syndrome (IBS) among the conditions Dr. Lowenheim treats.
Pediatric gastroenterology physicians near Dr. Lowenheim
Counts of pediatric gastroenterology physicians 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. Mark S. Lowenheim's patients have a median age of 15
Across all payers, Dmand AI patient panel data puts Dr. Lowenheim's median patient age at 15, with 50% women.
Dr. Lowenheim's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 15
Patient panel by sex, all payers
- Women50%
- Men49%
Source: Dmand AI Patient Panel Data
Dr. Mark S. Lowenheim received $2,476 in industry payments from 2016 to 2025
CMS Open Payments shows 108 general payments to Dr. Lowenheim from 13 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 99% of the total. Abbvie Inc. paid the most, $1,143.
General payments to Dr. Lowenheim by program year, 2016 to 2025
General payments to Dr. Lowenheim by kind, 2016 to 2025
- Food and beverage$2,45499%
- Education$221%
Companies that paid Dr. Lowenheim 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. Mark S. Lowenheim graduated from Ross University School of Medicine
Dr. Lowenheim graduated from Ross University School of Medicine in 1984.
- Medical school
Source: Dmand AI Professional Profile Data
Dr. Mark S. Lowenheim accepts plans from 11 insurance carriers
Dr. Lowenheim is in network with 11 carriers, including Aetna, United Healthcare and Blue Cross Blue Shield of Michigan. HMO plans come from the most carriers, 7. Check the plan with the practice before a visit.
- Aetna
- United Healthcare
- Blue Cross Blue Shield of Michigan
- Elevance
- HCSC
- MVP Health Care
- Alliant Health Plans
- Aspirus Health Plan
- +3 more carriersWith a free account
Plan types Dr. Lowenheim accepts, by number of carriers
- HMO7
- PPO7
- EPO3
- POS3
- Medicaid2
- Medicare2
Source: Dmand AI Insurance Network Data
Sources for Dr. Mark S. Lowenheim'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 | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network 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. Mark S. Lowenheim
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. Mark S. Lowenheim's NPI number?
Dr. Mark S. Lowenheim's NPI number is 1285676429. It was assigned on June 12, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Mark S. Lowenheim?
Dr. Mark S. Lowenheim is a pediatric gastroenterology physician in Port Jefferson, New York. The primary specialty in the NPI Registry is Pediatric Gastroenterology Physician (taxonomy code 2080P0206X).
Where does Dr. Mark S. Lowenheim practice?
Dr. Lowenheim practices at 200 Belle Terre Road, Port Jefferson, NY 11777. Dr. Lowenheim's primary practice is Good Samaritan University Hospital St. Charles Campus in Port Jefferson, New York, part of Diocese of Rockville Centre. Dmand AI also links Dr. Lowenheim to 1 physician office and 1 medical group.
What is Dr. Mark S. Lowenheim's office phone number?
The practice phone on file for Dr. Lowenheim is (631) 474-6000.
What is Dr. Mark S. Lowenheim's medical license number?
Dr. Lowenheim holds New York license 170700, one of the licenses on file in 2 states.
Which states has Dr. Mark S. Lowenheim been licensed in?
Dmand AI has state licenses on file for Dr. Lowenheim in New York (1987 to 2027) and New Jersey.
Which hospitals is Dr. Mark S. Lowenheim affiliated with?
Dr. Lowenheim practices at Good Samaritan University Hospital St. Charles Campus in Port Jefferson, New York.
What medical group is Dr. Mark S. Lowenheim part of?
Dr. Lowenheim is linked to Good Samaritan University Hospital. Dmand AI links Dr. Lowenheim to 1 more medical group.
Where did Dr. Mark S. Lowenheim go to medical school?
Dr. Lowenheim graduated from Ross University School of Medicine in 1984.
Has Dr. Mark S. Lowenheim received payments from drug or device companies?
CMS Open Payments shows $2,476 in general payments to Dr. Lowenheim from 13 companies from 2016 to 2025. The largest total came from Abbvie Inc.
How long has Dr. Mark S. Lowenheim been practicing?
Dr. Lowenheim graduated from medical school in 1984, 42 years ago.
What insurance does Dr. Mark S. Lowenheim accept?
Dr. Lowenheim is in network with 11 carriers, including Aetna, United Healthcare and Blue Cross Blue Shield of Michigan. HMO plans come from the most carriers, 7. Check the plan with the practice before a visit.
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