NPPES file of Aug 9, 2026

Eric C. Mayer, LSW

Mental Health Counselor · Chicago, IL

Eric C. Mayer, LSW is a mental health counselor with a practice address in Chicago, Illinois, and NPI 1265201347, issued on Dec 29, 2023. Check the license (Illinois 150.112755, as entered in NPPES) with the Illinois board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1265201347
Name
Eric C. Mayer
Credential
LSW
Primary taxonomy
Mental Health Counselor 101YM0800X
License number
150.112755 IL
Self-reported in NPPES; status is on the state search
Practice location
3001 N Southport Ave FL 2, Chicago, IL 60657
Phone
(773) 799-8966
Enumerated
Dec 29, 2023
Record last updated
Dec 29, 2023
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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8 nearest mental health counselor records → All 10,716 in Illinois → Look up another NPI →

Also registered at 3001 N Southport Ave FL 2

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Nahime Aguirre Mtanous, LCSWClinical Social Worker1598498875
  2. Nicole Barone, LCPCProfessional Counselor1619697505
  3. Patrick Deloach, LMFTMarriage & Family Therapist1255061115
  4. Ami Goetz, LSW, PELSocial Worker1093448383
  5. Rebecca MazurkiewiczProfessional Counselor1922736073
  6. Zachary McCarthy, LPCCounselor1003544297

Verify Eric C. Mayer in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Illinois board licenses this profession
    Search for license 150.112755    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the Illinois license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Eric C. Mayer among 10,716 mental health counselor records in Illinois

Eric C. Mayer, LSW is one of 10,716 mental health counselor records with a practice address in Illinois. 4% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2023, is newer than 67% of them.

  • NPI issued2023 · 67% of these records are older, 24% newer
  • In a Medicare fileNo · 4% of these records are
  • In the CMS Doctors and Clinicians fileNo · 7% of these records are
  • Record last updated2023 · 47% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 101YM0800X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

2,130 mental health counselor records list a practice address in Chicago

They are 2,130 of the 63,379 NPPES records with a practice address in Chicago, and 10,716 mental health counselor records in Illinois. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 10,716 in Illinois → Every provider in Chicago → Mental Health Counselor nationwide →

The 8 mental health counselor records with the nearest ZIP codes

  1. Nora Brennan, LCSWChicago, IL 606571851596993
  2. John Carney, PSY.D.Chicago, IL 606571447422910
  3. Jeffery Duke, LCPCChicago, IL 606571831235852
  4. Kathleen Geiser, MA, LCPCChicago, IL 606571497950935
  5. Anna Glass, MA, LCPCChicago, IL 606571033434238
  6. Elizabeth Hennessey, L.C.P.C, A.T.R.Chicago, IL 606571841484987
  7. Catherine Hennessy Price, LCSWChicago, IL 606571467693671
  8. Jamie Kach, LCPCChicago, IL 606571518149145

Common questions

What is Eric C. Mayer, LSW's NPI number?

Eric C. Mayer, LSW's National Provider Identifier (NPI) is 1265201347, issued on Dec 29, 2023. An NPI identifies a provider in billing; it is not a license.

Where is Eric C. Mayer, LSW located?

The NPPES record lists a practice address at 3001 N Southport Ave FL 2, Chicago, IL, 60657. Phone: (773) 799-8966. Providers update this record themselves, so call before visiting.

How can I verify Eric C. Mayer, LSW's license?

NPPES lists Illinois license number 150.112755, as entered by the provider. Search the Illinois board that licenses this profession; the NPPES record confirms identity only.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.