TOM KLEIN (MD) – Internal Medicine Physician, NPI 1326094194
Internal Medicine Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
8,824 INTERNAL MEDICINE in IL
Provider Addresses for TOM KLEIN (MD)
3825 N Central Ave
Chicago, IL 606342719
Phone: (847) 325-5110
Fax: (847) 325-5114
Type: Location
N2460 Geneva Street
Lake Geneva, WI 53147
Phone: (847) 325-5110
Fax: (847) 325-5114
Type: Location
North Milwaukee Avenue, Riverwoods, Lake County, Illinois, 60069, United States
RIVERWOODS, IL 600153512
Phone: (847) 325-5110
Fax: (847) 325-5114
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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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: 2007-11-17
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 |
|---|---|---|---|---|
| I20071117000145 | I | Internal Medicine | 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.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 99424 | Principal care management services for a single high-risk disease, first 30 minutes provided personally by qualified health care professional, per calendar month. | 1,077 | 170 | $0 |
| 99349 | Residence visit for established patient with moderate level of medical decision making, per day, if using time, at least 40 minutes | 223 | 100 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 162 | 36 | $0 |
| 99233 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 103 | 30 | $0 |
| G0181 | Physician or allowed practitioner supervision of a patient receiving medicare-covered services provided by a participating home health agency (patient not present) requiring complex and multidisciplinary care modalities involving regular physician or allow | 85 | 32 | $0 |
Insurance plans in this area (ZIP 60634)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| - | IL | |
| Nurse Practitioner | IL | |
| - | IL | |
| Family Practice | IL | |
| - | IL | |
| Nurse Practitioner | IL | |
| Internal Medicine, Family Practice, General Practice | IL | |
| Nurse Practitioner | IL |
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