Tom Klein, MD
NPI 1326094194 · Internal Medicine Physician · Riverwoods, IL
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Tom Klein, MD is a Internal Medicine Physician provider in Riverwoods, IL (NPI 1326094194).
Provider details
- NPI number
- 1326094194
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 4193020 (WI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
2,793 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. 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.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Principal Care Management Services for a Single High-Risk Disease, First 30 Minutes Provided Personally By Qualified Health Care Professional, Per Calendar Month.99424 | 1,660 | $71 |
| Residence Visit for Established Patient With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 40 Minutes99349 | 271 | $121 |
| Subsequent Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99309 | 174 | $103 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 131 | $124 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 113 | $114 |
| Principal Care Management Services for a Single High-Risk Disease, First 30 Minutes Provided Personally By Qualified Health Care Professional, Per Calendar Month. |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 313 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 3,081 | 295 |
| Amlodipine Besylate | 2,008 | 192 |
| Levothyroxine Sodium | 2,004 | 165 |
| Metformin Hcl | 1,647 | 129 |
| Lisinopril | 1,422 | 136 |
| Metoprolol Tartrate | 1,360 | 124 |
| Gabapentin |
Practice location
Mailing address
Additional practice locations (2)
- 3825 N Central AveChicago, IL 60634-2719Phone: (847) 325-5110Fax: (847) 325-5114
- N2460 Geneva StreetLake Geneva, WI 53147Phone: (847) 325-5110Fax: (847) 325-5114
Registry dates
- Enumerated
- 2006-05-25
- Last updated
- 2024-12-03
- Certified
- 2024-12-03
Frequently asked questions
- What is Tom Klein's NPI number?
- Tom Klein's National Provider Identifier (NPI) is 1326094194, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Tom Klein's specialty?
- Tom Klein is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Tom Klein located?
- Tom Klein's practice location on file with NPPES is 1105 Milwaukee Ave, Riverwoods, IL 60015-3512.
- What is Tom Klein's phone number?
- The practice phone number listed in the NPPES registry for Tom Klein is (847) 325-5110.
- Does Tom Klein accept Medicare?
- Tom Klein is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Tom Klein's NPI active?
- Yes — Tom Klein's NPI (1326094194) is active in the NPPES registry as of the last update on 2024-12-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.