Willson Hartz, M.D.
NPI 1225084031 · Surgery Physician · Chicago, IL
Enrolled with Medicare as Practitioner - General Surgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Willson Hartz, M.D. is a Surgery Physician provider in Chicago, IL (NPI 1225084031).
Provider details
- NPI number
- 1225084031
- Entity type
- Individual
- Primary specialty
- Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
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
83% 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
- 2006-05-25
- Last updated
- 2007-07-08
Frequently asked questions
- What is Willson Hartz's NPI number?
- Willson Hartz's National Provider Identifier (NPI) is 1225084031, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Willson Hartz's specialty?
- Willson Hartz is listed in the NPPES registry with a primary specialty of Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is Willson Hartz located?
- Willson Hartz's practice location on file with NPPES is 676 N Saint Clair St, Chicago, IL 60611-2927.
- What is Willson Hartz's phone number?
- The practice phone number listed in the NPPES registry for Willson Hartz is (312) 951-5640.
- Does Willson Hartz accept Medicare?
- Willson Hartz is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Willson Hartz's NPI active?
- Yes — Willson Hartz's NPI (1225084031) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.