Isabel Nellen, DO
Obstetrics & Gynecology Physician · Madison, WI
Isabel Nellen, DO is an obstetrics & gynecology physician with a practice address in Madison, Wisconsin, and NPI 1508220344, issued on Apr 7, 2016. Check the license (Wisconsin 69229, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Isabel Nellen
- Credential
- DO
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- 69229 WI
Self-reported in NPPES; status is on the state search - Practice location
- 5801 Research Park Blvd Ste 400, Madison, WI 53719
- Phone
- (608) 729-6300
- Enumerated
- Apr 7, 2016
- Record last updated
- Oct 11, 2024
- Fax
- (608) 729-1099
- Medicare enrollment
- Enrolled (PECOS I20201002000278); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 796 in Wisconsin → Look up another NPI →
Also registered at 5801 Research Park Blvd Ste 400
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jill Ciske, MSGenetic Counselor (M.S.)1447030358
- Ashley Durward, MDObstetrics & Gynecology Physician1548656168
- Sarah Juza, MDObstetrics & Gynecology Physician1659691301
- Shannon Wixom, APRNFamily Nurse Practitioner1699231043
Verify Isabel Nellen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 69229Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
90% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024
16 Medicare Part D claims, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D.
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: $96.48
1 payment: food and beverage; the largest payer was Applied Medical Resources Corporation. The 21,429 providers of this specialty with any payment received $1,030.61 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
- Madison Womens Health LLPMadison, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Isabel Nellen among 796 obstetrics & gynecology physician records in Wisconsin
Isabel Nellen, DO is one of 796 obstetrics & gynecology 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 2016, is newer than 81% of them.
- NPI issued2016 · 81% of these records are older, 17% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated2016 · median 2007 among the 478 with a school on file
- Record last updated2024 · 48% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207V00000X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Obstetrics & Gynecology Physician providers in Wisconsin
There are 796 obstetrics & gynecology physician records in Wisconsin.
All 796 in Wisconsin → Every provider in Madison → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Gregory Bills, MDMadison, WI 537191851367940
- Brenda Casey, MDMadison, WI 537191669474508
- Karla Dickmeyer, M.D.Madison, WI 537191336104421
- Ashley Durward, MDMadison, WI 537191548656168
- Joel Henry, MDMadison, WI 537191740256767
- Sarah Juza, MDMadison, WI 537191659691301
- Sherwin Rudman, MDMadison, WI 537191477521516
- Erin Schoenecker, MDMadison, WI 537191548237241
Common questions
What is Isabel Nellen, DO's NPI number?
Isabel Nellen, DO's National Provider Identifier (NPI) is 1508220344, issued on Apr 7, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Isabel Nellen, DO located?
The NPPES record lists a practice address at 5801 Research Park Blvd Ste 400, Madison, WI, 53719. Phone: (608) 729-6300. Providers update this record themselves, so call before visiting.
How can I verify Isabel Nellen, DO's license?
NPPES lists Wisconsin license number 69229, 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 Isabel Nellen, DO prescribe under Medicare Part D?
In 2024, Isabel Nellen, DO had 16 Medicare Part D claims; the average among obstetrics & gynecology physician prescribers was 165. 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.