Gregory B. McCallum, MD
Family Medicine Physician · Redwood Falls, MN
Gregory B. McCallum, MD is a family medicine physician with a practice address in Redwood Falls, Minnesota, and NPI 1689642282, issued on Mar 9, 2006. Check the license (Minnesota 34641, as entered in NPPES) on the Minnesota Board of Medical Practice; the Medicare figures below come from public CMS files.
- Name
- Gregory B. McCallum
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 34641 MN
Self-reported in NPPES; status is on the state search - Practice location
- 1100 East Broadway, Redwood Falls, MN 56283
- Phone
- (507) 637-2985
- Enumerated
- Mar 9, 2006
- Record last updated
- Aug 28, 2024
- Fax
- (507) 637-6678
- Medicaid ID
- 950365000 MN
- Medicare enrollment
- Enrolled (PECOS I20171201001483); accepts Medicare assignment
- Medical or professional school
- University Of Minnesota Medical School, 1990
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 3,985 in Minnesota → Look up another NPI →
Also registered at 1100 East Broadway
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Joshua Friese, MDFamily Medicine Physician1407822133
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- Steven Medrud, MDFamily Medicine Physician1497721708
- Dennis Nelson, MDFamily Medicine Physician1417923798
Verify Gregory B. McCallum in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMinnesota Board of Medical Practice
Search for license 34641Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
74% more Medicare Part D claims than the average family medicine physician in 2024
6,182 Medicare Part D claims for 323 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 104 claims were for opioids.
Most prescribed
- Atorvastatin Calcium411 claims
- Amlodipine Besylate337 claims
- Losartan Potassium297 claims
- Lisinopril246 claims
- Metoprolol Succinate237 claims
- Furosemide204 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.
Bills Medicare through 2 group practices
- Carris Health - Redwood LLCRedwood Falls, MN
- Centracare Clinic Southwest LLCWillmar, MN
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gregory B. McCallum among 3,985 family medicine physician records in Minnesota
Gregory B. McCallum, MD is one of 3,985 family medicine physician records with a practice address in Minnesota. 74% 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 12% of them.
- NPI issued2006 · 12% of these records are older, 42% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated1990 · median 2006 among the 2,483 with a school on file
- Record last updated2024 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Minnesota practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
11 family medicine physician records list a practice address in Redwood Falls
They are 11 of the 102 NPPES records with a practice address in Redwood Falls, and 3,985 family medicine physician records in Minnesota.
All 3,985 in Minnesota → Every provider in Redwood Falls → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- David Danielson, MDRedwood Falls, MN 562831679885974
- Joshua Friese, MDRedwood Falls, MN 562831407822133
- Cynthia Gronau, MDRedwood Falls, MN 562831124094842
- Gavin Maurer, MDRedwood Falls, MN 562831164955621
- Steven Medrud, MDRedwood Falls, MN 562831497721708
- Robin Muller, M.D.Redwood Falls, MN 562831255867008
- Dennis Nelson, MDRedwood Falls, MN 562831417923798
- Alan Olson, MDRedwood Falls, MN 562831619943081
Common questions
What is Gregory B. McCallum, MD's NPI number?
Gregory B. McCallum, MD's National Provider Identifier (NPI) is 1689642282, issued on Mar 9, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gregory B. McCallum, MD located?
The NPPES record lists a practice address at 1100 East Broadway, Redwood Falls, MN, 56283. Phone: (507) 637-2985. Providers update this record themselves, so call before visiting.
How can I verify Gregory B. McCallum, MD's license?
NPPES lists Minnesota license number 34641, 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 Gregory B. McCallum, MD prescribe under Medicare Part D?
In 2024, Gregory B. McCallum, MD had 6,182 Medicare Part D claims for 323 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.