Greg Ewert, M.D.
NPI 1376591974 · Internal Medicine Physician · Chicago, IL
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Greg Ewert, M.D. is a Internal Medicine Physician provider in Chicago, IL (NPI 1376591974).
Provider details
- NPI number
- 1376591974
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
Specialties & taxonomies
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
83% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
435 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) |
|---|---|---|
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 122 | $9 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 | 100 | $15 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 76 | $94 |
| Automated Urinalysis Test81003 | 62 | $2 |
| Administration of Pneumococcal VaccineG0009 | 57 | $29 |
| Administration of Influenza Virus VaccineG0008 | 18 | $34 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 31 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 196 | 53 |
| Lisinopril | 94 | 27 |
| Rosuvastatin Calcium | 93 | 26 |
| Hydrochlorothiazide | 86 | 23 |
| Losartan Potassium | 72 | 19 |
| Metoprolol Succinate | 56 | 17 |
| Tamsulosin Hcl |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-05-05
- Last updated
- 2007-07-09
Frequently asked questions
- What is Greg Ewert's NPI number?
- Greg Ewert's National Provider Identifier (NPI) is 1376591974, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Greg Ewert's specialty?
- Greg Ewert is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Greg Ewert located?
- Greg Ewert's practice location on file with NPPES is 200 S Michigan Ave, Chicago, IL 60604-2402.
- What is Greg Ewert's phone number?
- The practice phone number listed in the NPPES registry for Greg Ewert is (312) 922-3815.
- Does Greg Ewert accept Medicare?
- Greg Ewert is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Greg Ewert's NPI active?
- Yes — Greg Ewert's NPI (1376591974) is active in the NPPES registry as of the last update on 2007-07-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.