Ralph Weichselbaum, M.D.
NPI 1578510749 · Radiation Oncology Physician · Chicago, IL
Enrolled with Medicare as Practitioner - Radiation Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ralph Weichselbaum, M.D. is a Radiation Oncology Physician provider in Chicago, IL (NPI 1578510749).
Provider details
- NPI number
- 1578510749
- Entity type
- Individual
- Primary specialty
- Radiation Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- License
- 34518 (MA)
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
- 2006-05-31
- Last updated
- 2007-07-08
Frequently asked questions
- What is Ralph Weichselbaum's NPI number?
- Ralph Weichselbaum's National Provider Identifier (NPI) is 1578510749, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ralph Weichselbaum's specialty?
- Ralph Weichselbaum is listed in the NPPES registry with a primary specialty of Radiation Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Ralph Weichselbaum located?
- Ralph Weichselbaum's practice location on file with NPPES is 5758 S Maryland Ave, Chicago, IL 60637-1426.
- What is Ralph Weichselbaum's phone number?
- The practice phone number listed in the NPPES registry for Ralph Weichselbaum is (773) 702-0817.
- Does Ralph Weichselbaum accept Medicare?
- Ralph Weichselbaum is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ralph Weichselbaum's NPI active?
- Yes — Ralph Weichselbaum's NPI (1578510749) 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.