Dr. Isabel C. Nellen, DO
- Part D claims, 2024
- 16
- Hospital affiliations
- 1
- Industry payments
- $3,302
- Medical groups
- 2
- State license
- 1
- Practice address
- 5801 Research Park Blvd, Madison, WI 53719
- Practice phone
- Call (608) 729-6300
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Madison Women's Health
Madison, Wisconsin
Find Dr. Nellen's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Isabel C. Nellen is an OB-GYN in Madison, Wisconsin
Dr. Nellen practices at Madison Women's Health in Madison, Wisconsin.
Dr. Nellen's NPI, 1508220344, was assigned on April 7, 2016. Dr. Nellen holds Wisconsin license 69229.
- NPI
- 1508220344NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0941549018
- NPI enumeration date
- April 7, 2016
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (608) 729-6300
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 36
- Medical school graduation
- 2016
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Isabel C. Nellen practices at Madison Women's Health in Madison, Wisconsin
Dr. Nellen's primary practice is Madison Women's Health, at 5801 Research Park Blvd, Madison, WI 53719 in Dane County. The practice phone is (608) 729-6300.
- Madison Women's Health5801 Research Park Blvd, Madison, WI 53719 · Dane CountyPhone(608) 729-6300
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Isabel C. Nellen is affiliated with 3 sites of care and 2 medical groups
Dr. Nellen's primary practice is Madison Women's Health in Madison, Wisconsin. Dr. Nellen is also affiliated with University Hospital. The medical group on file is Madison Women's Health. Dmand AI also links Dr. Nellen to 1 more group practice or clinic and 1 medical group, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Isabel C. Nellen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Nellen practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Madison Women's Health | Available with a free account |
| +2 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Isabel C. Nellen is one of 651 OB-GYNs in Wisconsin
Obstetrics and gynecology is Dr. Nellen's primary specialty in the NPI Registry, under taxonomy code 207V00000X. Dr. Nellen is licensed in Wisconsin.
Specialties and state licenses
- Obstetrics and gynecology, WisconsinPrimary
OB-GYNs near Dr. Nellen
Counts of OB-GYNs with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Isabel C. Nellen's patients have a median age of 34
Across all payers, Dmand AI patient panel data puts Dr. Nellen's median patient age at 34, with 99% women.
Dr. Nellen's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 34
Patient panel by sex, all payers
- Women99%
- Men1%
Source: Dmand AI Patient Panel Data
Dr. Isabel C. Nellen wrote 16 Medicare Part D claims in 2024
In 2024, Dr. Nellen wrote 16 Medicare Part D claims. Every claim was for a generic drug. They cover 1 drug, with $91 in total drug cost.
Dr. Nellen's most prescribed drugs by claims, 2019
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. Isabel C. Nellen takes part in Medicare
Dr. Nellen accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Isabel C. Nellen received $3,302 in industry payments from 2022 to 2025
CMS Open Payments shows 6 general payments to Dr. Nellen from 4 drug and device companies from 2022 to 2025. Education make up the largest share, 91% of the total. Intuitive Surgical, Inc. paid the most, $3,163.
General payments to Dr. Nellen by program year, 2022 to 2025
General payments to Dr. Nellen by kind, 2022 to 2025
- Education$3,00091%
- Food and beverage$3029%
Companies that paid Dr. Nellen the most, 2022 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Isabel C. Nellen's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Isabel C. Nellen
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Isabel C. Nellen's NPI number?
Dr. Isabel C. Nellen's NPI number is 1508220344. It was assigned on April 7, 2016, and it is active in the NPI Registry.
What kind of doctor is Dr. Isabel C. Nellen?
Dr. Isabel C. Nellen is an OB-GYN in Madison, Wisconsin. The primary specialty in the NPI Registry is Obstetrics & Gynecology Physician (taxonomy code 207V00000X).
Where does Dr. Isabel C. Nellen practice?
Dr. Nellen practices at 5801 Research Park Blvd, Madison, WI 53719. Dr. Nellen's primary practice is Madison Women's Health in Madison, Wisconsin. Dmand AI also links Dr. Nellen to 1 group practice or clinic and 1 medical group.
What is Dr. Isabel C. Nellen's office phone number?
The practice phone on file for Dr. Nellen is (608) 729-6300.
What is Dr. Isabel C. Nellen's medical license number?
Dr. Nellen holds Wisconsin license 69229.
Which hospitals is Dr. Isabel C. Nellen affiliated with?
Dr. Nellen is affiliated with University Hospital.
What medical group is Dr. Isabel C. Nellen part of?
Dr. Nellen is linked to Madison Women's Health. Dmand AI links Dr. Nellen to 1 more medical group.
Does Dr. Isabel C. Nellen accept Medicare?
Yes. CMS lists Dr. Nellen as accepting Medicare assignment.
What drugs does Dr. Isabel C. Nellen prescribe most?
In 2019 Medicare Part D data, Dr. Nellen's most prescribed drugs by claims were Oxycodone HCl.
Has Dr. Isabel C. Nellen received payments from drug or device companies?
CMS Open Payments shows $3,302 in general payments to Dr. Nellen from 4 companies from 2022 to 2025. The largest total came from Intuitive Surgical, Inc.
How long has Dr. Isabel C. Nellen been practicing?
Dr. Nellen graduated from medical school in 2016, 10 years ago.
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