Diana Willadsen, M.D.
NPI 1528099793 · Hematology & Oncology Physician · Springfield, IL
Diana Willadsen, M.D. is a Hematology & Oncology Physician provider in Springfield, IL (NPI 1528099793).
Provider details
- NPI number
- 1528099793
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 036113415 (IL)
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
19 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
- 2006-07-06
- Last updated
- 2008-08-23
Frequently asked questions
- What is Diana Willadsen's NPI number?
- Diana Willadsen's National Provider Identifier (NPI) is 1528099793, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Diana Willadsen's specialty?
- Diana Willadsen is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Diana Willadsen located?
- Diana Willadsen's practice location on file with NPPES is 1025 S 6th St, Springfield, IL 62703-2403.
- What is Diana Willadsen's phone number?
- The practice phone number listed in the NPPES registry for Diana Willadsen is (217) 528-7541.
- Is Diana Willadsen's NPI active?
- Yes — Diana Willadsen's NPI (1528099793) is active in the NPPES registry as of the last update on 2008-08-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.