Karen Nielson, M.D.
NPI 1831137454 · Radiation Oncology Physician · Fort Worth, TX
Enrolled with Medicare as Practitioner - Radiation Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Karen Nielson, M.D. is a Radiation Oncology Physician provider in Fort Worth, TX (NPI 1831137454).
Provider details
- NPI number
- 1831137454
- Entity type
- Individual
- Primary specialty
- Radiation Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- H7800 (TX)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-06-04
- Last updated
- 2016-07-28
Frequently asked questions
- What is Karen Nielson's NPI number?
- Karen Nielson's National Provider Identifier (NPI) is 1831137454, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karen Nielson's specialty?
- Karen Nielson is listed in the NPPES registry with a primary specialty of Radiation Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Karen Nielson located?
- Karen Nielson's practice location on file with NPPES is 1500 Cooper St, Fort Worth, TX 76104-2710.
- What is Karen Nielson's phone number?
- The practice phone number listed in the NPPES registry for Karen Nielson is (682) 885-4007.
- Does Karen Nielson accept Medicare?
- Karen Nielson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Karen Nielson's NPI active?
- Yes — Karen Nielson's NPI (1831137454) is active in the NPPES registry as of the last update on 2016-07-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.