Charles Chen, MD
NPI 1588190003 · Critical Care Medicine (Internal Medicine) Physician · Chicago, IL
Enrolled with Medicare as Order and Referring Only - Sleep Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Charles Chen, MD is a Critical Care Medicine (Internal Medicine) Physician provider in Chicago, IL (NPI 1588190003).
Provider details
- NPI number
- 1588190003
- Entity type
- Individual
- Primary specialty
- Critical Care Medicine (Internal Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 036152950 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
9 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
66 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) |
|---|---|---|
| Critical Care, First 30-74 Minutes99291 | 66 | $224 |
Typical Medicare-allowed amounts for these services range $224–$224 (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.
Practice location
Mailing address
Additional practice locations (1)
- 2650 Ridge AveIm Hospitalists Ste 4210Evanston, IL 60201-1718Phone: (847) 570-1010Fax: (847) 733-5108
Registry dates
- Enumerated
- 2017-05-03
- Last updated
- 2025-06-30
- Certified
- 2025-06-30
Frequently asked questions
- What is Charles Chen's NPI number?
- Charles Chen's National Provider Identifier (NPI) is 1588190003, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Charles Chen's specialty?
- Charles Chen is listed in the NPPES registry with a primary specialty of Critical Care Medicine (Internal Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Charles Chen located?
- Charles Chen's practice location on file with NPPES is 5841 S Maryland Ave, Chicago, IL 60637-1443.
- What is Charles Chen's phone number?
- The practice phone number listed in the NPPES registry for Charles Chen is (773) 834-9500.
- Does Charles Chen accept Medicare?
- Charles Chen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Charles Chen's NPI active?
- Yes — Charles Chen's NPI (1588190003) is active in the NPPES registry as of the last update on 2025-06-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.