IndividualActive
Ilyssa Marks, LCSW
NPI 1972077147 · Clinical Social Worker · Elmhurst, IL
Ilyssa Marks, LCSW is a Clinical Social Worker provider in Elmhurst, IL (NPI 1972077147).
Provider details
- NPI number
- 1972077147
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- LCSW
- Sex
- Female
- Sole proprietor
- Yes
- License
- 149.020872 (IL)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
Established profile(72/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
7 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
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
340 W Butterfield Road
Suite 4b
Elmhurst, IL 60126
Phone: (813) 318-2120
Street-level locationGet directions
Mailing address
121 S Vail Ave Apt 204
Arlington Heights, IL 60005-1854
Additional practice locations (1)
- 121 S Vail Ave Apt 204Arlington Heights, IL 60005-1854Phone: (813) 318-2120
Registry dates
- Enumerated
- 2019-01-21
- Last updated
- 2022-04-12
- Certified
- 2022-04-12
Frequently asked questions
- What is Ilyssa Marks's NPI number?
- Ilyssa Marks's National Provider Identifier (NPI) is 1972077147, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ilyssa Marks's specialty?
- Ilyssa Marks is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Ilyssa Marks located?
- Ilyssa Marks's practice location on file with NPPES is 340 W Butterfield Road, Elmhurst, IL 60126.
- What is Ilyssa Marks's phone number?
- The practice phone number listed in the NPPES registry for Ilyssa Marks is (813) 318-2120.
- Is Ilyssa Marks's NPI active?
- Yes — Ilyssa Marks's NPI (1972077147) is active in the NPPES registry as of the last update on 2022-04-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.