Dr. Mark Lasak Mallek, MD
- Medicare services, 2018
- 494
- Part D claims, 2019
- 138
- Industry payments
- $592
- Affiliated sites
- 1
- State license
- 1
- Practice address
- 280 Main St, Nashua, NH 03060-2919
- Practice phone
- Call (603) 881-8000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Foundation Gastroenterology
Physician office · Nashua, New Hampshire
Find Dr. Mallek'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 Lasak Mallek is a gastroenterologist in Nashua, New Hampshire
Dr. Mallek practices at Foundation Gastroenterology in Nashua, New Hampshire.
Dr. Mallek's NPI, 1609841832, was assigned on February 21, 2006. Dr. Mallek holds New Hampshire license 6560.
- NPI
- 1609841832NPI Registry (opens in a new tab)
- NPI enumeration date
- February 21, 2006
- NPI status
- Active
- Practice phone
- (603) 881-8000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Mark Lasak Mallek practices at Foundation Gastroenterology in Nashua, New Hampshire
Dr. Mallek's primary practice is Foundation Gastroenterology, at 280 Main St, Nashua, NH 03060-2919. The practice phone is (603) 881-8000.
- Foundation Gastroenterology280 Main St, Nashua, NH 03060-2919Phone(603) 881-8000
Source: Dmand AI Affiliation Data
Dr. Mark Lasak Mallek is affiliated with 1 site of care
Dr. Mallek's primary practice is Foundation Gastroenterology in Nashua, New Hampshire.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Mark Lasak Mallek's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Mallek practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Foundation Gastroenterology | 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 each health system and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Mark Lasak Mallek is one of 87 gastroenterologists in New Hampshire
Gastroenterology is Dr. Mallek's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dr. Mallek is licensed in New Hampshire.
Specialties and state licenses
- Gastroenterology, New HampshirePrimary
Gastroenterologists near Dr. Mallek
Counts of gastroenterologists 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 Lasak Mallek billed Medicare for 494 services in 2018
CMS data shows 494 Medicare services from Dr. Mallek across 9 procedure codes in 2018. Medicare paid $51,354 for them.
Dr. Mallek's Medicare services by type, 2017 to 2018
- 2017
- 2018
- Office and hospital visits
- 2017: 3932018: 21845%
- Surgery
- 2017: 3382018: 18645%
- Other services
- 2017: 992018: 909%
Where Dr. Mallek's Medicare services took place, 2018
- In an office20141%
- In a facility29359%
Dr. Mallek compared with the New Hampshire median for gastroenterologists, 2018
- Dr. Mallek
- New Hampshire median
- Medicare services
- 494vs 492Close to median
- Part D claims
- 138vs 22839% below
Medians across 82 gastroenterologists in New Hampshire with Dmand AI profiles that report each measure.
Dr. Mallek's most billed Medicare procedure codes, 2018
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Mallek?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Mallek and other gastroenterologists in New Hampshire.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Mark Lasak Mallek's patients have a median age of 65
Across all payers, Dmand AI patient panel data puts Dr. Mallek's median patient age at 65, with 44% women.
Dr. Mallek'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
- Women44%
- Men56%
Source: Dmand AI Patient Panel Data
Dr. Mark Lasak Mallek wrote 138 Medicare Part D claims in 2019
In 2019, Dr. Mallek wrote 138 Medicare Part D claims. They cover 4 drugs, with $7,271 in total drug cost. In 2018, CMS named 1,185 claims across 24 drugs.
Dr. Mallek's most prescribed drugs by claims, 2019
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, 2018 to 2019
- 2018
- 2019
- Claims for drugs CMS names
- 2018: 1,1852019: 13888%
Drugs named by CMS: 4 in 2019, 24 in 2018.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. Mark Lasak Mallek received $592 in industry payments from 2016 to 2018
CMS Open Payments shows 38 general payments to Dr. Mallek from 12 drug and device companies from 2016 to 2018. Food and beverage make up the largest share, 100% of the total. Merck Sharp & Dohme Corporation paid the most, $105.
General payments to Dr. Mallek by program year, 2016 to 2018
Companies that paid Dr. Mallek the most, 2016 to 2018
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Mark Lasak Mallek'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 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) |
| 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. Mark Lasak Mallek
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 Lasak Mallek's NPI number?
Dr. Mark Lasak Mallek's NPI number is 1609841832. It was assigned on February 21, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Mark Lasak Mallek?
Dr. Mark Lasak Mallek is a gastroenterologist in Nashua, New Hampshire. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).
Where does Dr. Mark Lasak Mallek practice?
Dr. Mallek practices at 280 Main St, Nashua, NH 03060-2919. Dr. Mallek's primary practice is Foundation Gastroenterology in Nashua, New Hampshire.
What is Dr. Mark Lasak Mallek's office phone number?
The practice phone on file for Dr. Mallek is (603) 881-8000.
What is Dr. Mark Lasak Mallek's medical license number?
Dr. Mallek holds New Hampshire license 6560.
Does Dr. Mark Lasak Mallek accept Medicare?
Yes. CMS data shows Dr. Mallek billed Medicare for 494 services in 2018.
What services does Dr. Mark Lasak Mallek bill to Medicare?
In 2018, Dr. Mallek's most billed Medicare services were office visit, established patient (99213), surgery: digestive system (43239) and medicare service (G0105).
What drugs does Dr. Mark Lasak Mallek prescribe most?
In 2019 Medicare Part D data, Dr. Mallek's most prescribed drugs by claims were Omeprazole, Pantoprazole Sodium and Dicyclomine HCl.
Has Dr. Mark Lasak Mallek received payments from drug or device companies?
CMS Open Payments shows $592 in general payments to Dr. Mallek from 12 companies from 2016 to 2018. The largest total came from Merck Sharp & Dohme Corporation.
How long has Dr. Mark Lasak Mallek been practicing?
Dr. Mallek's NPI was assigned in 2006.
Selling to gastroenterology practices?
See gastroenterologists in New Hampshire by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card