IndividualActive
John Ludwig, LSW
NPI 1255164455 · Clinical Social Worker · Chicago, IL
John Ludwig, LSW is a Clinical Social Worker provider in Chicago, IL (NPI 1255164455).
Provider details
- NPI number
- 1255164455
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- LSW
- Sex
- Male
- Sole proprietor
- No
- License
- 149031732 (IL)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
Established profile(56/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
2 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
4433 N Ravenswood Ave Ste 210
Chicago, IL 60640-7755
Phone: (773) 876-8763
Fax: (872) 315-3138
Street-level locationGet directions
Mailing address
4433 N Ravenswood Ave Ste 210
Chicago, IL 60640-7755
Registry dates
- Enumerated
- 2024-08-22
- Last updated
- 2026-04-23
- Certified
- 2026-04-23
Frequently asked questions
- What is John Ludwig's NPI number?
- John Ludwig's National Provider Identifier (NPI) is 1255164455, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Ludwig's specialty?
- John Ludwig is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is John Ludwig located?
- John Ludwig's practice location on file with NPPES is 4433 N Ravenswood Ave Ste 210, Chicago, IL 60640-7755.
- What is John Ludwig's phone number?
- The practice phone number listed in the NPPES registry for John Ludwig is (773) 876-8763.
- Is John Ludwig's NPI active?
- Yes — John Ludwig's NPI (1255164455) is active in the NPPES registry as of the last update on 2026-04-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.