Wendi Marcus, M.D.
NPI 1548249113 · Internal Medicine Physician · Buffalo Grove, IL
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Wendi Marcus, M.D. is a Internal Medicine Physician provider in Buffalo Grove, IL (NPI 1548249113).
Provider details
- NPI number
- 1548249113
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 036086159 (IL)
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
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
919 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 | 277 | $134 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 268 | $95 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 222 | $137 |
| Administration of Influenza Virus VaccineG0008 | 71 | $33 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 | 42 | $15 |
| Transitional Care Management Services for Problem of at Least Moderate Complexity99495 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 69 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 350 | 89 |
| Levothyroxine Sodium | 255 | 63 |
| Amlodipine Besylate | 199 | 53 |
| Simvastatin | 193 | 52 |
| Lisinopril | 174 | 46 |
| Omeprazole | 138 | 42 |
| Metoprolol Succinate | 131 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-01-12
- Last updated
- 2021-10-05
- Certified
- 2021-10-05
Frequently asked questions
- What is Wendi Marcus's NPI number?
- Wendi Marcus's National Provider Identifier (NPI) is 1548249113, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Wendi Marcus's specialty?
- Wendi Marcus is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Wendi Marcus located?
- Wendi Marcus's practice location on file with NPPES is 15 S Mchenry Rd, Buffalo Grove, IL 60089-6705.
- What is Wendi Marcus's phone number?
- The practice phone number listed in the NPPES registry for Wendi Marcus is (847) 618-0351.
- Does Wendi Marcus accept Medicare?
- Wendi Marcus is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Wendi Marcus's NPI active?
- Yes — Wendi Marcus's NPI (1548249113) is active in the NPPES registry as of the last update on 2021-10-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.