Cynthia K. Gronau, MD
Family Medicine Physician · Redwood Falls, MN
Cynthia K. Gronau, MD is a family medicine physician with a practice address in Redwood Falls, Minnesota, and NPI 1124094842, issued on Feb 23, 2006. Check the license (Minnesota 43905, as entered in NPPES) on the Minnesota Board of Medical Practice; the Medicare figures below come from public CMS files.
- Name
- Cynthia K. Gronau
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 43905 MN
Self-reported in NPPES; status is on the state search - Practice location
- 1100 E Broadway, Redwood Falls, MN 56283
- Phone
- (507) 637-2985
- Enumerated
- Feb 23, 2006
- Record last updated
- Jul 13, 2026
- Fax
- (507) 637-6678
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 3,985 in Minnesota → Look up another NPI →
Also registered at 1100 E Broadway
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Scott Hagen, ODOptometrist1730155045
Verify Cynthia K. Gronau in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMinnesota Board of Medical Practice
Search for license 43905Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
20% fewer Medicare Part D claims than the average family medicine physician in 2024
2,827 Medicare Part D claims for 216 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 55 claims were for opioids.
Most prescribed
- Omeprazole158 claims
- Levothyroxine Sodium146 claims
- Lisinopril142 claims
- Atorvastatin Calcium135 claims
- Losartan Potassium122 claims
- Amlodipine Besylate114 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.
Cynthia K. Gronau among 3,985 family medicine physician records in Minnesota
Cynthia K. Gronau, 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 fileNo · 62% of these records are
- Record last updated2026 · 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
- Gavin Maurer, MDRedwood Falls, MN 562831164955621
- Gregory McCallum, MDRedwood Falls, MN 562831689642282
- 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 Cynthia K. Gronau, MD's NPI number?
Cynthia K. Gronau, MD's National Provider Identifier (NPI) is 1124094842, issued on Feb 23, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Cynthia K. Gronau, MD located?
The NPPES record lists a practice address at 1100 E Broadway, Redwood Falls, MN, 56283. Phone: (507) 637-2985. Providers update this record themselves, so call before visiting.
How can I verify Cynthia K. Gronau, MD's license?
NPPES lists Minnesota license number 43905, 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 Cynthia K. Gronau, MD prescribe under Medicare Part D?
In 2024, Cynthia K. Gronau, MD had 2,827 Medicare Part D claims for 216 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.