DR. THOMAS R SAK (PSYD) – Clinical Neuropsychologist, NPI 1073090239
Clinical Neuropsychologist
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
1,600 CLINICAL PSYCHOLOGIST in IL
Loading map...
Provider Addresses for DR. THOMAS R SAK (PSYD)
618, Library Place, Downtown, Evanston, Evanston Township, Cook County, Illinois, 60201, United States
EVANSTON, IL 602012908
Phone:
Type: Mailing
420 Lake Cook Rd Ste 112
Deerfield, IL 600154914
Phone: (847) 469-7537
Fax: (847) 469-7540
Type: Location
2604 Dempster St Ste 407B
Park Ridge, IL 600688428
Phone: (847) 469-7537
Fax: (847) 469-7540
Type: Location
2551 N Clark St Ste 200
Chicago, IL 606141798
Phone: (847) 469-7537
Fax: (847) 469-7540
Type: Location
17W662 Butterfield Rd Ste 302
Oakbrook Terrace, IL 601814006
Phone: (847) 469-7537
Fax: (847) 469-7540
Type: Location
1603 Orrington Ave Ste 600
Evanston, IL 602013860
Phone: (847) 469-7537
Fax: (847) 469-7540
Type: Location
2300 N Barrington Rd Ste 105
Hoffman Estates, IL 601692033
Phone: (847) 469-7537
Fax: (847) 469-7540
Type: Location
1531 S Grove Ave Unit 105
Barrington, IL 600105250
Phone: (847) 469-7537
Fax: (847) 469-7540
Type: Location
1451 MERCHANT DR
ALGONQUIN, IL 601025917
Phone: (847) 469-7537
Fax: (847) 469-7540
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
Loading prescription activity...
Open Payments (CMS)
No Open Payments data available for this provider.
This can happen when there are no reportable CMS Open Payments records.
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2025-03-04
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20250304000746 | I | Clinical Psychologist | IL | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
No Medicare fee-for-service utilization data available for this provider in our database.
Insurance plans in this area (ZIP 60201)
Loading plans...
Group practice members
| Name | Specialty | State |
|---|---|---|
| Clinical Psychologist | IL | |
| Clinical Psychologist | IL | |
| Clinical Psychologist | IL | |
| Clinical Psychologist | IL | |
| Clinical Psychologist | IL | |
| Clinical Psychologist | IL | |
| Clinical Social Worker | IL | |
| Clinical Psychologist | IN | |
| Clinical Psychologist | IL | |
| Clinical Psychologist | IL |
Reviews
All reviews are moderated before publication. Reviews reflect users' opinions; we do not verify the accuracy of individual reviews.
No reviews yet. Be the first to share your experience — your opinion helps families compare providers.