Michael Klein, M.D.
NPI 1790834737 · Family Medicine Physician · Alton, IL
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Michael Klein, M.D. is a Family Medicine Physician provider in Alton, IL (NPI 1790834737).
Provider details
- NPI number
- 1790834737
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 36-117409 (IL)
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
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
2,722 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 972 | $124 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 846 | $9 |
| Anticoagulant Management of Patient Taking Warfarin93793 | 274 | $11 |
| Blood Test, Clotting Time85610 | 157 | $4 |
| Administration of Influenza Virus VaccineG0008 | 134 | $32 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 101 | $87 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 198 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 946 | 269 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 881 | 133 |
| Amlodipine Besylate | 658 | 190 |
| Levothyroxine Sodium | 610 | 160 |
| Losartan Potassium | 583 | 158 |
| Lisinopril | 545 | 157 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-01-09
- Last updated
- 2014-01-22
Frequently asked questions
- What is Michael Klein's NPI number?
- Michael Klein's National Provider Identifier (NPI) is 1790834737, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Michael Klein's specialty?
- Michael Klein is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Michael Klein located?
- Michael Klein's practice location on file with NPPES is 2 Saint Anthonys Way, Alton, IL 62002-4569.
- What is Michael Klein's phone number?
- The practice phone number listed in the NPPES registry for Michael Klein is (618) 462-2222.
- Does Michael Klein accept Medicare?
- Michael Klein is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Michael Klein's NPI active?
- Yes — Michael Klein's NPI (1790834737) is active in the NPPES registry as of the last update on 2014-01-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.