Felix Ling, MD
NPI 1477728715 · Critical Care Medicine (Internal Medicine) Physician · Winfield, IL
Enrolled with Medicare as Practitioner - Critical Care (intensivists) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Felix Ling, MD is a Critical Care Medicine (Internal Medicine) Physician provider in Winfield, IL (NPI 1477728715).
Provider details
- NPI number
- 1477728715
- Entity type
- Individual
- Primary specialty
- Critical Care Medicine (Internal Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 036.118479 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
18 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
126 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 | 73 | $224 |
| Insertion of Artery Tube for Blood Sampling Or Infusion Through Skin36620 | 38 | $46 |
| Insertion of Non-Tunneled Central Venous Tube for Infusion (5 Years Or Older)36556 | 15 | $90 |
Typical Medicare-allowed amounts for these services range $46–$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
Registry dates
- Enumerated
- 2008-04-28
- Last updated
- 2012-09-07
Frequently asked questions
- What is Felix Ling's NPI number?
- Felix Ling's National Provider Identifier (NPI) is 1477728715, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Felix Ling's specialty?
- Felix Ling is listed in the NPPES registry with a primary specialty of Critical Care Medicine (Internal Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Felix Ling located?
- Felix Ling's practice location on file with NPPES is 25 N Winfield Rd, Winfield, IL 60190-1295.
- What is Felix Ling's phone number?
- The practice phone number listed in the NPPES registry for Felix Ling is (630) 933-4700.
- Does Felix Ling accept Medicare?
- Felix Ling is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Felix Ling's NPI active?
- Yes — Felix Ling's NPI (1477728715) is active in the NPPES registry as of the last update on 2012-09-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.