William W. Chase, MD
Family Medicine Physician · Norwalk, IA
William W. Chase, MD is a family medicine physician with a practice address in Norwalk, Iowa, and NPI 1841259504, issued on Mar 21, 2006. Check the license (Iowa 34287, as entered in NPPES) on the Iowa Board of Medicine; the Medicare figures below come from public CMS files.
- Name
- William W. Chase
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 34287 IA
Self-reported in NPPES; status is on the state search - Practice location
- 801 Colonial Cir, Norwalk, IA 50211
- Phone
- (515) 285-3200
- Enumerated
- Mar 21, 2006
- Record last updated
- Aug 15, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (515) 285-3232
- Medicaid IDs
- 1841259504 IA
5215319 IA - Medicare enrollment
- Enrolled (PECOS I20040721000205); accepts Medicare assignment
- Medical or professional school
- University Of Iowa, Rj & L Carver College Of Medicine, 2000
- Entity
- Type 1 · individual
Also registered at 801 Colonial Cir
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jason Brehmer, DOFamily Medicine Physician1629089974
- Lori Denton, PAPhysician Assistant1770542201
- Kathryn MillerFamily Nurse Practitioner1902798192
- Laura Nielsen, D.O.Family Medicine Physician1922447234
- Thomas Rezansoff, FNPFamily Nurse Practitioner1992453393
- Andrea Silvers, MDFamily Medicine Physician1134189640
Verify William W. Chase in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIowa Board of Medicine
Search for license 34287Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.4 times the Medicare Part D claims of the average family medicine physician in 2024
8,493 Medicare Part D claims for 594 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. 277 claims were for opioids.
Most prescribed
- Atorvastatin Calcium631 claims
- Levothyroxine Sodium340 claims
- Amlodipine Besylate318 claims
- Metformin Hcl293 claims
- Simvastatin279 claims
- Lisinopril273 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
- Iowa Physicians Clinic Medical FoundationNorwalk, IA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
11 family medicine physician records list a practice address in Norwalk
They are 11 of the 134 NPPES records with a practice address in Norwalk, and 2,336 family medicine physician records in Iowa.
All 11 in Norwalk → All 2,336 in Iowa → Every provider in Norwalk →
Other family medicine physician records in Iowa
- Jennifer Aanestad, M.D.Durant, IA1386649341
- Amjad Abdelhady, MDSioux City, IA1033966700
- Afsana Abdullah, D.O.Bettendorf, IA1760583066
- Raja Ali Abdullah, MDCedar Falls, IA1356101000
- Laura Abels, DOAnkeny, IA1427313527
- Matthew AbendrothDes Moines, IA1972918894
- Mabra Abernathy, M.D.Coralville, IA1316922545
- Jennifer Abler, D.O.Altoona, IA1528159068
- Michael Abouassaly, M.D.West Burlington, IA1184790909
- Safa Abukhalil, M.B.B.SWest Des Moines, IA1982084463
Common questions
What is William W. Chase, MD's NPI number?
William W. Chase, MD's National Provider Identifier (NPI) is 1841259504, issued on Mar 21, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William W. Chase, MD located?
The NPPES record lists a practice address at 801 Colonial Cir, Norwalk, IA, 50211. Phone: (515) 285-3200. Providers update this record themselves, so call before visiting.
How can I verify William W. Chase, MD's license?
NPPES lists Iowa license number 34287, as entered by the provider. Search the Iowa Board of Medicine at https://dial.iowa.gov/about-dial/boards-and-commissions/medicine. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does William W. Chase, MD prescribe under Medicare Part D?
In 2024, William W. Chase, MD had 8,493 Medicare Part D claims for 594 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.