Mark Albert Nelson, MD
Gastroenterology Physician · La Porte, IN
Mark Albert Nelson, MD is a gastroenterology physician with a practice address in La Porte, Indiana, and NPI 1891737763, issued on Jun 12, 2006. Check the license (Indiana 01040264A, as entered in NPPES) on the Medical Licensing Board of Indiana; the Medicare figures below come from public CMS files.
- Name
- Mark Albert Nelson
- Credential
- MD
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- 01040264A IN
Self-reported in NPPES; status is on the state search - Practice location
- 900 I St FL 2, La Porte, IN 46350
- Phone
- (219) 872-6566
- Enumerated
- Jun 12, 2006
- Record last updated
- Oct 13, 2023
- Fax
- (219) 872-2712
- Medicaid ID
- 100209820A IN
- Medicare enrollment
- Enrolled (PECOS I20100219000677); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 372 in Indiana → Look up another NPI →
Also registered at 900 I St FL 2
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Victor Benavides Martinez, MDFamily Medicine Physician1518382613
- Jody Kupferberg, ARNPAdult Health Nurse Practitioner1902037542
- Brian Moore, MDSurgery Physician1205942075
- Sara Szynal, NPFamily Nurse Practitioner1710613591
Verify Mark Albert Nelson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Licensing Board of Indiana
Search for license 01040264ACheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
64% more Medicare Part D claims than the average gastroenterology physician in 2024
1,328 Medicare Part D claims for 326 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims.
Most prescribed
- Pantoprazole Sodium243 claims
- Omeprazole182 claims
- Famotidine90 claims
- Linzess72 claims
- Nortriptyline Hcl61 claims
- Mesalamine57 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $181.62
5 payments; by number, the most common kind was food and beverage; the largest payer was Olympus America Inc. The 13,350 providers of this specialty with any payment received $5,015.95 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Franciscan Physician NetworkMichigan City, IN
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark Albert Nelson among 372 gastroenterology physician records in Indiana
Mark Albert Nelson, MD is one of 372 gastroenterology physician records with a practice address in Indiana. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 17% of them.
- NPI issued2006 · 17% of these records are older, 47% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 73% of these records are
- Graduated1987 · median 2001 among the 272 with a school on file
- Record last updated2023 · 42% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a Indiana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in Indiana
There are 372 gastroenterology physician records in Indiana.
All 372 in Indiana → Every provider in La Porte → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Alexander Igolnikov, MDLa Porte, IN 463501437249182
- Peter Mavrelis, MDHobart, IN 463421326043597
- Mohammad ArfeenMichigan City, IN 463601932640075
- Kevin BurkeMichigan City, IN 463601477930204
- David FumoMichigan City, IN 463601164463725
- Rakesh Gupta, MDMichigan City, IN 463601285704494
- Eugene Lyubashevsky, M.D.Michigan City, IN 463601952372039
- Ranga Kota, M.D.Portage, IN 463681932145745
Common questions
What is Mark Albert Nelson, MD's NPI number?
Mark Albert Nelson, MD's National Provider Identifier (NPI) is 1891737763, issued on Jun 12, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark Albert Nelson, MD located?
The NPPES record lists a practice address at 900 I St FL 2, La Porte, IN, 46350. Phone: (219) 872-6566. Providers update this record themselves, so call before visiting.
How can I verify Mark Albert Nelson, MD's license?
NPPES lists Indiana license number 01040264A, as entered by the provider. Search the Medical Licensing Board of Indiana at https://www.in.gov/pla/professions/physicians-home/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mark Albert Nelson, MD prescribe under Medicare Part D?
In 2024, Mark Albert Nelson, MD had 1,328 Medicare Part D claims for 326 beneficiaries; the average among gastroenterology physician prescribers was 811. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.