Katherine Nielsen
- Publications
- 1
- Hospital affiliations
- 1
- Industry payments
- $532
- Medical groups
- 2
- Insurance carriers
- 12
- Practice address
- 1201 W La Veta Ave, Orange, CA 92868
- Practice phone
- Call (714) 997-3000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Children's Hospital of Orange County Main Campus
Orange, California
Find Katherine Nielsen'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.
Katherine Nielsen is a pediatrician in Orange, California
Katherine Nielsen practices at Children's Hospital of Orange County Main Campus in Orange, California.
Katherine Nielsen's NPI, 1598129249, was assigned on April 8, 2016. Katherine Nielsen graduated from College of Medicine - Tucson in 2016. Katherine Nielsen holds California license A150744.
- NPI
- 1598129249NPI Registry (opens in a new tab)
- NPI enumeration date
- April 8, 2016
- NPI status
- Active
- Practice phone
- (714) 997-3000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Medical school graduation
- 2016
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Katherine Nielsen practices at Children's Hospital of Orange County Main Campus in Orange, California
Katherine Nielsen's primary practice is Children's Hospital of Orange County Main Campus, at 1201 W La Veta Ave, Orange, CA 92868 in Orange County. The practice phone is (714) 997-3000.
- Children's Hospital of Orange County Main Campus1201 W La Veta Ave, Orange, CA 92868 · Orange CountyPhone(714) 997-3000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Katherine Nielsen is affiliated with 2 sites of care and 2 medical groups
Katherine Nielsen's primary practice is Children's Hospital of Orange County Main Campus in Orange, California. Katherine Nielsen is also affiliated with Rady Children's Hospital - Orange County. The medical group on file is CHOC Children's. Dmand AI also links Katherine Nielsen to 1 more medical group, named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Katherine Nielsen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Katherine Nielsen practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Children's Hospital of Orange County Main Campus | Available with a free account |
| +1 more site and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Katherine Nielsen is one of 8,236 pediatricians in California
Pediatrics is Katherine Nielsen's primary specialty in the NPI Registry, under taxonomy code 208000000X. Katherine Nielsen is board certified in pediatrics by the American Board of Pediatrics. Katherine Nielsen is licensed in California.
Specialties and state licenses
- Pediatrics, CaliforniaPrimary
Pediatricians near Katherine Nielsen
Counts of pediatricians 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
Katherine Nielsen's patients have a median age of 11
Across all payers, Dmand AI patient panel data puts Katherine Nielsen's median patient age at 11, with 52% women.
Katherine Nielsen's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 11
Patient panel by sex, all payers
- Women52%
- Men47%
Source: Dmand AI Patient Panel Data
Katherine Nielsen has 1 publication on record
Dmand AI links 1 paper to Katherine Nielsen in 2012.
Recent publications by Katherine Nielsen
See who Katherine Nielsen researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Katherine Nielsen works with, so you can find a warm path to the right pediatricians.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Katherine Nielsen received $532 in industry payments from 2019 to 2025
CMS Open Payments shows 21 general payments to Katherine Nielsen from 12 drug and device companies from 2019 to 2025. Food and beverage make up the largest share, 100% of the total. GlaxoSmithKline, LLC. paid the most, $175.
General payments to Katherine Nielsen by program year, 2019 to 2025
Companies that paid Katherine Nielsen the most, 2019 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Katherine Nielsen graduated from College of Medicine - Tucson
Katherine Nielsen graduated from College of Medicine - Tucson in 2016.
- Medical school
- Board certified in pediatrics
Source: Dmand AI Professional Profile Data
Katherine Nielsen accepts plans from 12 insurance carriers
Katherine Nielsen is in network with 12 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. Medicare plans come from the most carriers, 7. Check the plan with the practice before a visit.
- Aetna
- Blue Cross Blue Shield of Michigan
- United Healthcare
- Blue Cross Blue Shield of Massachusetts
- HCSC
- LA Care
- Molina
- Regence Health Plans
- +4 more carriersWith a free account
Plan types Katherine Nielsen accepts, by number of carriers
- Medicare7
- PPO7
- HMO5
- POS4
- EPO2
- Medicaid2
Source: Dmand AI Insurance Network Data
Sources for Katherine Nielsen'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 DataDmand AI Org Hierarchy Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| 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 Katherine Nielsen
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Katherine Nielsen's NPI number?
Katherine Nielsen's NPI number is 1598129249. It was assigned on April 8, 2016, and it is active in the NPI Registry.
What does Katherine Nielsen specialize in?
Katherine Nielsen is a pediatrician in Orange, California. The primary specialty in the NPI Registry is Pediatrics Physician (taxonomy code 208000000X).
Where does Katherine Nielsen practice?
Katherine Nielsen practices at 1201 W La Veta Ave, Orange, CA 92868. Katherine Nielsen's primary practice is Children's Hospital of Orange County Main Campus in Orange, California. Dmand AI also links Katherine Nielsen to 1 medical group.
What is Katherine Nielsen's office phone number?
The practice phone on file for Katherine Nielsen is (714) 997-3000.
What is Katherine Nielsen's medical license number?
Katherine Nielsen holds California license A150744.
Which hospitals is Katherine Nielsen affiliated with?
Katherine Nielsen is affiliated with Rady Children's Hospital - Orange County.
What medical group is Katherine Nielsen part of?
Katherine Nielsen is linked to CHOC Children's. Dmand AI links Katherine Nielsen to 1 more medical group.
Is Katherine Nielsen board certified?
Yes. Katherine Nielsen is board certified in pediatrics by the American Board of Pediatrics.
Where did Katherine Nielsen go to medical school?
Katherine Nielsen graduated from College of Medicine - Tucson in 2016.
Has Katherine Nielsen received payments from drug or device companies?
CMS Open Payments shows $532 in general payments to Katherine Nielsen from 12 companies from 2019 to 2025. The largest total came from GlaxoSmithKline, LLC.
Show 3 more questionsShow fewer questions
How long has Katherine Nielsen been practicing?
Katherine Nielsen graduated from medical school in 2016, 10 years ago.
Does Katherine Nielsen do research?
Dmand AI links 1 publication to Katherine Nielsen.
What insurance does Katherine Nielsen accept?
Katherine Nielsen is in network with 12 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. Medicare plans come from the most carriers, 7. Check the plan with the practice before a visit.
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