Dr. Mark Albert Nelson, MD
- Medicare services, 2024
- 1,183
- Medicare patients, 2024
- 591
- Part D claims, 2024
- 1,328
- Hospital affiliations
- 2
- Industry payments
- $2,072
- Practice address
- 900 I Street, Suite 1, La Porte, IN 46350
- Practice phone
- Call (219) 324-1670
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Franciscan Surgery Center LaPorte
Surgery Center - Medicare-Certified · La Porte, Indiana
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Dr. Mark Albert Nelson is a gastroenterologist in La Porte, Indiana
Dr. Nelson practices at Franciscan Surgery Center LaPorte in La Porte, Indiana.
Dr. Nelson's NPI, 1891737763, was assigned on June 12, 2006. Dr. Nelson holds Indiana license 01040264A.
- NPI
- 1891737763NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9537061379
- NPI enumeration date
- June 12, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (219) 324-1670
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 65
- Medical school graduation
- 1987
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Mark Albert Nelson practices at Franciscan Surgery Center LaPorte in La Porte, Indiana
Dr. Nelson's primary practice is Franciscan Surgery Center LaPorte, at 900 I Street, Suite 1, La Porte, IN 46350. The practice phone is (219) 324-1670.
- Franciscan Surgery Center LaPorte900 I Street, Suite 1, La Porte, IN 46350Phone(219) 324-1670
Source: Dmand AI Affiliation Data
Dr. Mark Albert Nelson is affiliated with 4 sites of care and 1 medical group
Dr. Nelson's primary practice is Franciscan Surgery Center LaPorte in La Porte, Indiana. Dr. Nelson is also affiliated with Northwest Health - La Porte. The medical group on file is Franciscan Physician Network. Dmand AI also links Dr. Nelson to 1 more hospital and 1 group practice or clinic, 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 Albert Nelson's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Nelson practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Franciscan Surgery Center LaPorte | Available with a free account |
| +3 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Mark Albert Nelson is one of 333 gastroenterologists in Indiana
Gastroenterology is Dr. Nelson's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dr. Nelson is licensed in Indiana.
Specialties and state licenses
- Gastroenterology, IndianaPrimary
Gastroenterologists near Dr. Nelson
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 Albert Nelson billed Medicare for 1,183 services in 2024
CMS data shows 1,183 Medicare services from Dr. Nelson across 18 procedure codes in 2024, for 591 Medicare patients. Medicare paid $96,172 for them.
Dr. Nelson's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 6502024: 49923%
- Surgery
- 2023: 4292024: 3909%
- Other services
- 2023: 3862024: 28227%
- Tests and treatments
- 2023: 02024: 12
Where Dr. Nelson's Medicare services took place, 2024
- In an office22819%
- In a facility95581%
Dr. Nelson compared with the Indiana median for gastroenterologists, 2024
- Dr. Nelson
- Indiana median
- Medicare services
- 1,183vs 4712.5 times
- Medicare patients
- 591vs 30991% above
- Part D claims
- 1,087vs 4222.6 times
Medians across 330 gastroenterologists in Indiana with Dmand AI profiles that report each measure.
Dr. Nelson's most billed Medicare procedure codes, 2024
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. Nelson and other gastroenterologists in Indiana.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Mark Albert Nelson treated 591 Medicare patients in 2024, average age 73
CMS counts 591 Medicare patients who saw Dr. Nelson in 2024. The largest group is 65 to 74, with 304 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 12% are also on Medicaid. Their average risk score is 1.25, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Nelson's median patient age at 69, with 55% women.
Dr. Nelson's Medicare patients by age, 2024
Dr. Nelson's Medicare patients by sex, 2024
- Women32956%
- Men26244%
Chronic conditions among Dr. Nelson's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis46%
- Diabetes32%
- Ischemic heart disease30%
- Mood disorders28%
- Chronic kidney disease27%
- Anxiety26%
Share of Medicare patients with each condition. A patient can have several.
Dr. Nelson's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 69
Patient panel by sex, all payers
- Women55%
- Men45%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Mark Albert Nelson wrote 1,328 Medicare Part D claims in 2024
In 2024, Dr. Nelson wrote 1,328 Medicare Part D claims for 326 patients. 86% of them were for generic drugs. CMS names the drug for 1,087 of them, across 23 drugs with 11 or more claims each, at $101,493 in total drug cost. In 2023, CMS named 1,137 claims across 27 drugs.
Dr. Nelson's Part D claims by kind of drug, 2024
- Generic1,141 claims86%
- Brand-name187 claims14%
Dr. Nelson'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. Nelson's Part D claims, 2024
- Antibiotics3%43 of 1,328 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: 1,1372024: 1,0874%
Drugs named by CMS: 23 in 2024, 27 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
Dr. Mark Albert Nelson ranks in the 90th percentile for colonoscopy in Medicare
Dr. Nelson accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 164 procedures of colonoscopy by Dr. Nelson, more than 90% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Nelson ranks in Medicare procedure volume
- Colonoscopy
- 90th percentile164 procedures
- Upper gastrointestinal (GI) endoscopy for acid reflux
- 85th percentile149 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Mark Albert Nelson received $2,072 in industry payments from 2016 to 2025
CMS Open Payments shows 110 general payments to Dr. Nelson from 22 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 99% of the total. Olympus America Inc. paid the most, $505.
General payments to Dr. Nelson by program year, 2016 to 2025
General payments to Dr. Nelson by kind, 2016 to 2025
- Food and beverage$2,05999%
- Education$131%
Companies that paid Dr. Nelson 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. Mark Albert Nelson'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 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 DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| 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) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (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 Albert Nelson
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 Albert Nelson's NPI number?
Dr. Mark Albert Nelson's NPI number is 1891737763. It was assigned on June 12, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Mark Albert Nelson?
Dr. Mark Albert Nelson is a gastroenterologist in La Porte, Indiana. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).
Where does Dr. Mark Albert Nelson practice?
Dr. Nelson practices at 900 I Street, Suite 1, La Porte, IN 46350. Dr. Nelson's primary practice is Franciscan Surgery Center LaPorte in La Porte, Indiana. Dmand AI also links Dr. Nelson to 1 hospital and 1 group practice or clinic.
What is Dr. Mark Albert Nelson's office phone number?
The practice phone on file for Dr. Nelson is (219) 324-1670.
What is Dr. Mark Albert Nelson's medical license number?
Dr. Nelson holds Indiana license 01040264A.
Which hospitals is Dr. Mark Albert Nelson affiliated with?
Dr. Nelson is affiliated with Northwest Health - La Porte. Dmand AI links Dr. Nelson to 1 more hospital.
What medical group is Dr. Mark Albert Nelson part of?
Dr. Nelson is linked to Franciscan Physician Network.
Does Dr. Mark Albert Nelson accept Medicare?
Yes. CMS data shows Dr. Nelson billed Medicare for 1,183 services in 2024, and Dr. Nelson accepts Medicare assignment.
How many Medicare patients does Dr. Mark Albert Nelson see?
CMS counts 591 Medicare patients who saw Dr. Nelson in 2024, with an average age of 73.
What services does Dr. Mark Albert Nelson bill to Medicare?
In 2024, Dr. Nelson's most billed Medicare services were medicare service (G0500), surgery: digestive system (45385) and office visit, established patient (99213).
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What drugs does Dr. Mark Albert Nelson prescribe most?
In 2024 Medicare Part D data, Dr. Nelson's most prescribed drugs by claims were Pantoprazole Sodium, Omeprazole and Famotidine.
Has Dr. Mark Albert Nelson received payments from drug or device companies?
CMS Open Payments shows $2,072 in general payments to Dr. Nelson from 22 companies from 2016 to 2025. The largest total came from Olympus America Inc.
How long has Dr. Mark Albert Nelson been practicing?
Dr. Nelson graduated from medical school in 1987, 39 years ago.
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