Mark R. Nielsen, MD
Internal Medicine Physician · Bloomington, MN
Mark R. Nielsen, MD is an internal medicine physician with a practice address in Bloomington, Minnesota, and NPI 1609830843, issued on Apr 14, 2006. Check the license (Minnesota 35777, as entered in NPPES) on the Minnesota Board of Medical Practice; the Medicare figures below come from public CMS files.
- Name
- Mark R. Nielsen
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 35777 MN
Self-reported in NPPES; status is on the state search - Practice location
- 600 W 98TH St, Bloomington, MN 55420
- Phone
- (952) 885-6060
- Enumerated
- Apr 14, 2006
- Record last updated
- May 16, 2008 (not updated in 18 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20050701000901); accepts Medicare assignment
- Medical or professional school
- University Of Minnesota Medical School, 1991
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,632 in Minnesota → Look up another NPI →
Also registered at 600 W 98TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Anne Brooker, PA-CMedical Physician Assistant1194372110
- Aaron Browne, PA-CPhysician Assistant1649407107
Verify Mark R. Nielsen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMinnesota Board of Medical Practice
Search for license 35777Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.0 times the Medicare Part D claims of the average internal medicine physician in 2024
9,486 Medicare Part D claims for 802 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 72 claims were for opioids.
Most prescribed
- Lisinopril731 claims
- Atorvastatin Calcium693 claims
- Amlodipine Besylate562 claims
- Simvastatin562 claims
- Levothyroxine Sodium412 claims
- Losartan Potassium350 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: $27.19
1 payment: food and beverage; the largest payer was Abbott Laboratories. The 50,334 providers of this specialty with any payment received $1,303.06 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
- Fairview ClinicsEagan, MN
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark R. Nielsen among 2,632 internal medicine physician records in Minnesota
Mark R. Nielsen, MD is one of 2,632 internal medicine physician records with a practice address in Minnesota. 75% 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 8% of them.
- NPI issued2006 · 8% of these records are older, 58% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 65% of these records are
- Graduated1991 · median 2008 among the 1,700 with a school on file
- Record last updated2008 · 57% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Minnesota practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
39 internal medicine physician records list a practice address in Bloomington
They are 39 of the 3,339 NPPES records with a practice address in Bloomington, and 2,632 internal medicine physician records in Minnesota.
All 2,632 in Minnesota → Every provider in Bloomington → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Paola Michelle Calle Sarmiento, MDBloomington, MN 554201184298002
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- Jonathan Katz, MDBloomington, MN 554201104889104
- Bryan Labore, MDBloomington, MN 554201124559893
- Cassandra Lall, M.D.Bloomington, MN 554201770739732
- Paul Ossmann, MDBloomington, MN 554201932162922
- Matthew Riethof, MDBloomington, MN 554201588627301
Common questions
What is Mark R. Nielsen, MD's NPI number?
Mark R. Nielsen, MD's National Provider Identifier (NPI) is 1609830843, issued on Apr 14, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark R. Nielsen, MD located?
The NPPES record lists a practice address at 600 W 98TH St, Bloomington, MN, 55420. Phone: (952) 885-6060. Providers update this record themselves, so call before visiting.
How can I verify Mark R. Nielsen, MD's license?
NPPES lists Minnesota license number 35777, as entered by the provider. Search the Minnesota Board of Medical Practice at https://mn.gov/boards/medical-practice/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mark R. Nielsen, MD prescribe under Medicare Part D?
In 2024, Mark R. Nielsen, MD had 9,486 Medicare Part D claims for 802 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.