Reginald Sy Cosiquien, MD
Family Medicine Physician · Eau Claire, WI
Reginald Sy Cosiquien, MD is a family medicine physician with a practice address in Eau Claire, Wisconsin, and NPI 1164699666, issued on May 14, 2008. Check the license (Wisconsin 50845-020, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Reginald Sy Cosiquien
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 50845-020 WI
Self-reported in NPPES; status is on the state search - Practice location
- 733 W Clairemont Ave, Eau Claire, WI 54701
- Phone
- (715) 838-5222
- Enumerated
- May 14, 2008
- Record last updated
- Sep 14, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20080716000635); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 3,765 in Wisconsin → Look up another NPI →
Also registered at 733 W Clairemont Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Abdulla Akfaly, MDInternal Medicine Physician1619956224
- Kay Alberg, RDNutritionist1962775791
- Richard Alfuth, MDFamily Medicine Physician1194783209
- John Anczak, PACPhysician Assistant1881793206
- Matthew Anderson, LPCProfessional Counselor1366698706
- Aamir Ansari, M.D.Pediatrics Physician1295918696
Verify Reginald Sy Cosiquien in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 50845-020Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.8 times the Medicare Part D claims of the average family medicine physician in 2024
9,789 Medicare Part D claims for 637 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. 184 claims were for opioids.
Most prescribed
- Amlodipine Besylate599 claims
- Rosuvastatin Calcium576 claims
- Atorvastatin Calcium522 claims
- Losartan Potassium351 claims
- Levothyroxine Sodium328 claims
- Metformin Hcl Er318 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 one group practice
- Mayo Clinic Health System-Northwest Wisconsin Region IncEau Claire, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Reginald Sy Cosiquien among 3,765 family medicine physician records in Wisconsin
Reginald Sy Cosiquien, MD is one of 3,765 family medicine physician records with a practice address in Wisconsin. 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 2008, is newer than 59% of them.
- NPI issued2008 · 59% of these records are older, 37% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated2001 · median 2007 among the 2,347 with a school on file
- Record last updated2020 · 56% 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 Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
111 family medicine physician records list a practice address in Eau Claire
They are 111 of the 3,085 NPPES records with a practice address in Eau Claire, and 3,765 family medicine physician records in Wisconsin.
All 3,765 in Wisconsin → Every provider in Eau Claire → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Mark Attermeier, MDEau Claire, WI 547011548231442
- John Bollinger, MDEau Claire, WI 547011518947662
- Catharine Decker, MDEau Claire, WI 547011700865003
- Gene Enders, MDEau Claire, WI 547011841261757
- Amy Falkenberg, MDEau Claire, WI 547011568453512
- Lisa Gillette, MDEau Claire, WI 547011215908124
- Paul Green, MDEau Claire, WI 547011801876966
- Paul Loomis, MDEau Claire, WI 547011073584975
Common questions
What is Reginald Sy Cosiquien, MD's NPI number?
Reginald Sy Cosiquien, MD's National Provider Identifier (NPI) is 1164699666, issued on May 14, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Reginald Sy Cosiquien, MD located?
The NPPES record lists a practice address at 733 W Clairemont Ave, Eau Claire, WI, 54701. Phone: (715) 838-5222. Providers update this record themselves, so call before visiting.
How can I verify Reginald Sy Cosiquien, MD's license?
NPPES lists Wisconsin license number 50845-020, as entered by the provider. Search the Wisconsin Medical Examining Board at https://dsps.wi.gov/Pages/BoardsCouncils/MEB/Default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Reginald Sy Cosiquien, MD prescribe under Medicare Part D?
In 2024, Reginald Sy Cosiquien, MD had 9,789 Medicare Part D claims for 637 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.