Zachary Richardson, MD
Internal Medicine Physician · Watertown, WI
Zachary Richardson, MD is an internal medicine physician with a practice address in Watertown, Wisconsin, and NPI 1437544863, issued on Apr 2, 2015. Check the license (Wisconsin 69363-20, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Zachary Richardson
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- 69363-20 WI
125066444 IL
Self-reported in NPPES; status is on the state search - Practice location
- 125 Hospital Dr, Watertown, WI 53098
- Phone
- (920) 245-5741
- Enumerated
- Apr 2, 2015
- Record last updated
- Jul 25, 2018 (not updated in 8 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20180807000776); accepts Medicare assignment
- Medical or professional school
- Loyola University Of Chicago, Stritch School Of Medicine, 2015
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,078 in Wisconsin → Look up another NPI →
Also registered at 125 Hospital Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Rebecca Altshull, RDRegistered Dietitian1023138682
- Julie Amundson, MPTPhysical Therapist1164648119
- Jeffery Aussprung, ATCAthletic Trainer1932228483
- Kaci Axelson, MDObstetrics & Gynecology Physician1043703325
- Timothy Barnes, PTPhysical Therapist1376905141
- Kristine Bennett, RDN,CDRegistered Dietitian1720592454
Verify Zachary Richardson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 69363-20Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
81% fewer Medicare Part D claims than the average internal medicine physician in 2024
596 Medicare Part D claims for 203 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 28 claims were for opioids.
Most prescribed
- Eliquis35 claims
- Furosemide32 claims
- Cefdinir30 claims
- Prednisone26 claims
- Spironolactone23 claims
- Azithromycin22 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
- Apogee Medical Group Wisconsin SCWatertown, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Zachary Richardson among 2,078 internal medicine physician records in Wisconsin
Zachary Richardson, MD is one of 2,078 internal medicine physician records with a practice address in Wisconsin. 70% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2015, is newer than 73% of them.
- NPI issued2015 · 73% of these records are older, 25% newer
- In a Medicare fileYes · 70% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated2015 · median 2002 among the 1,098 with a school on file
- Record last updated2018 · 55% 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 Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Internal Medicine Physician providers in Wisconsin
There are 2,078 internal medicine physician records in Wisconsin.
All 2,078 in Wisconsin → Every provider in Watertown → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Alan Detwiler, MDWatertown, WI 530981871597211
- Mohamed Yafai, MDWatertown, WI 530981730156431
- Deidre Faust, MDMequon, WI 530971154372092
- David Goldberg, MDMequon, WI 530971285792127
- Scott Jorgensen, M.D.Mequon, WI 530971184654725
- David Lucke, M.D.Mequon, WI 530971477580686
- George Munkwitz, M.D.Mequon, WI 530971073750238
- Rachel Oosterbaan-Panarese, M.D.Mequon, WI 530971588690986
Common questions
What is Zachary Richardson, MD's NPI number?
Zachary Richardson, MD's National Provider Identifier (NPI) is 1437544863, issued on Apr 2, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Zachary Richardson, MD located?
The NPPES record lists a practice address at 125 Hospital Dr, Watertown, WI, 53098. Phone: (920) 245-5741. Providers update this record themselves, so call before visiting.
How can I verify Zachary Richardson, MD's license?
NPPES lists Wisconsin license number 69363-20, 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 Zachary Richardson, MD prescribe under Medicare Part D?
In 2024, Zachary Richardson, MD had 596 Medicare Part D claims for 203 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.