David Charles Ritzow, M.D.
Orthopaedic Surgery Physician · Appleton, WI
David Charles Ritzow, M.D. is an orthopaedic surgery physician with a practice address in Appleton, Wisconsin, and NPI 1588617211, issued on May 17, 2006. Check the license (Wisconsin 39990, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- David Charles Ritzow
- Credential
- M.D.
- Primary taxonomy
- Orthopaedic Surgery Physician 207X00000X
- License number
- 39990 WI
Self-reported in NPPES; status is on the state search - Practice location
- 2105 E Enterprise Ave, Appleton, WI 54913
- Phone
- (920) 731-6611
- Enumerated
- May 17, 2006
- Record last updated
- Jul 13, 2026
- Fax
- (920) 731-6732
- Medicaid ID
- 32438900 WI
- Medicare enrollment
- Enrolled (PECOS I20050901000323); accepts Medicare assignment
- Medical or professional school
- University Of Wisconsin School Of Medicine, 1992
- Entity
- Type 1 · individual
8 nearest orthopaedic surgery physician records → All 656 in Wisconsin → Look up another NPI →
Also registered at 2105 E Enterprise Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Hillary Bashaw, APNP FNP-BCNurse Practitioner1265048805
- Bradley Borgen, APNPNurse Practitioner1255383006
- Eric Bowen, APNPAdult Health Nurse Practitioner1811179344
- David Eggert, MDOrthopaedic Surgery Physician1821026188
- Amanda Fischer, CNANurse's Aide1336323260
- Sheryl Gauthier, PA-CPhysician Assistant1114231974
Verify David Charles Ritzow in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 39990Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
45% fewer Medicare Part D claims than the average orthopaedic surgery physician in 2024
192 Medicare Part D claims for 107 beneficiaries, against an average of 346 among the 16,516 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims. 19 claims were for opioids.
Most prescribed
- Amoxicillin122 claims
- Clindamycin Hcl25 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.
Industry payments in 2024: $94.12
1 payment: food and beverage; the largest payer was Heron Therapeutics, Inc. The 15,003 providers of this specialty with any payment received $23,022.89 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Orthopedic And Sports Institute OF The Fox Valley S CShawano, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
David Charles Ritzow among 656 orthopaedic surgery physician records in Wisconsin
David Charles Ritzow, M.D. is one of 656 orthopaedic surgery physician records with a practice address in Wisconsin. 71% 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 15% of them.
- NPI issued2006 · 15% of these records are older, 41% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileYes · 61% of these records are
- Graduated1992 · median 2006 among the 401 with a school on file
- Record last updated2026 · 50% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207X00000X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Orthopaedic Surgery Physician providers in Wisconsin
There are 656 orthopaedic surgery physician records in Wisconsin.
All 656 in Wisconsin → Every provider in Appleton → Orthopaedic Surgery Physician nationwide →
The 8 orthopaedic surgery physician records with the nearest ZIP codes
- William Bodemer, M.D.Appleton, WI 549131497705370
- Jon Cherney, M.D.Appleton, WI 549131720046790
- David Eggert, MDAppleton, WI 549131821026188
- Karen Fields, PAAppleton, WI 549131104826130
- Robert Hausserman, M.D.Appleton, WI 549131821028135
- Shawn Hennigan, MDAppleton, WI 549131821026790
- James Kuplic, MDAppleton, WI 549131871546507
- Robert Limoni, MDAppleton, WI 549131548206444
Common questions
What is David Charles Ritzow, M.D.'s NPI number?
David Charles Ritzow, M.D.'s National Provider Identifier (NPI) is 1588617211, issued on May 17, 2006. An NPI identifies a provider in billing; it is not a license.
Where is David Charles Ritzow, M.D. located?
The NPPES record lists a practice address at 2105 E Enterprise Ave, Appleton, WI, 54913. Phone: (920) 731-6611. Providers update this record themselves, so call before visiting.
How can I verify David Charles Ritzow, M.D.'s license?
NPPES lists Wisconsin license number 39990, 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 David Charles Ritzow, M.D. prescribe under Medicare Part D?
In 2024, David Charles Ritzow, M.D. had 192 Medicare Part D claims for 107 beneficiaries; the average among orthopaedic surgery physician prescribers was 346. 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.