Robert Ratajczak, MD
NPI 1851911747 · Psychiatry Physician · Chicago, IL
Robert Ratajczak, MD is a Psychiatry Physician provider in Chicago, IL (NPI 1851911747).
Provider details
- NPI number
- 1851911747
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
6 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
- 2020-04-21
- Last updated
- 2024-06-26
- Certified
- 2024-06-26
Frequently asked questions
- What is Robert Ratajczak's NPI number?
- Robert Ratajczak's National Provider Identifier (NPI) is 1851911747, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Robert Ratajczak's specialty?
- Robert Ratajczak is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Robert Ratajczak located?
- Robert Ratajczak's practice location on file with NPPES is 561 W Diversey Pkwy Ste 217, Chicago, IL 60614-1682.
- What is Robert Ratajczak's phone number?
- The practice phone number listed in the NPPES registry for Robert Ratajczak is (773) 906-4546.
- Is Robert Ratajczak's NPI active?
- Yes — Robert Ratajczak's NPI (1851911747) is active in the NPPES registry as of the last update on 2024-06-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.