Michael Chen
NPI 1861954695 · Internal Medicine Physician · Chicago, IL
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Michael Chen is a Internal Medicine Physician provider in Chicago, IL (NPI 1861954695).
Provider details
- NPI number
- 1861954695
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Sex
- Male
- Sole proprietor
- No
- License
- 036.160120 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
7 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
179 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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 Straightforward Medical Decision Making, If Using Time, 10 Minutes Or More99212 | 88 | $59 |
| Hemoglobin A1c Level83036 | 48 | $10 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 29 | $133 |
| Administration of Influenza Virus VaccineG0008 | 14 | $34 |
Typical Medicare-allowed amounts for these services range $10–$133 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 45 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 607 | 212 |
| Losartan Potassium | 278 | 91 |
| Amlodipine Besylate | 228 | 79 |
| Famotidine | 162 | 71 |
| Metformin Hcl | 161 | 57 |
| Alendronate Sodium | 116 | 41 |
| Tamsulosin Hcl | 113 | 44 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$22 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2019-04-01
- Last updated
- 2025-06-05
- Certified
- 2025-06-05
Frequently asked questions
- What is Michael Chen's NPI number?
- Michael Chen's National Provider Identifier (NPI) is 1861954695, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Michael Chen's specialty?
- Michael Chen is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Michael Chen located?
- Michael Chen's practice location on file with NPPES is 2335 S Wentworth Ave Ste B, Chicago, IL 60616-0117.
- What is Michael Chen's phone number?
- The practice phone number listed in the NPPES registry for Michael Chen is (312) 566-4545.
- Does Michael Chen accept Medicare?
- Michael Chen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Michael Chen's NPI active?
- Yes — Michael Chen's NPI (1861954695) is active in the NPPES registry as of the last update on 2025-06-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.