Mauricio Villarreal, M.D.
NPI 1770978777 · Critical Care Medicine (Internal Medicine) Physician · Oak Lawn, IL
Enrolled with Medicare as Practitioner - Anesthesiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mauricio Villarreal, M.D. is a Critical Care Medicine (Internal Medicine) Physician provider in Oak Lawn, IL (NPI 1770978777).
Provider details
- NPI number
- 1770978777
- Entity type
- Individual
- Primary specialty
- Critical Care Medicine (Internal Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 036144641 (IL)
Specialties & taxonomies
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 tenure25% of score
11 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
157 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) |
|---|---|---|
| Critical Care, First 30-74 Minutes99291 | 105 | $222 |
| Insertion of Artery Tube for Blood Sampling Or Infusion Through Skin36620 | 24 | $46 |
| Emergent Insertion of Breathing Tube Into Windpipe Using an Endoscope31500 | 16 | $152 |
| Insertion of Non-Tunneled Central Venous Tube for Infusion (5 Years Or Older)36556 | 12 | $90 |
Typical Medicare-allowed amounts for these services range $46–$222 (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.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$359 across 7 records (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
Additional practice locations (1)
- 3134 N Clark StChicago, IL 60657-4414Phone: (773) 766-4949
Registry dates
- Enumerated
- 2015-04-06
- Last updated
- 2022-08-01
- Certified
- 2022-08-01
Frequently asked questions
- What is Mauricio Villarreal's NPI number?
- Mauricio Villarreal's National Provider Identifier (NPI) is 1770978777, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mauricio Villarreal's specialty?
- Mauricio Villarreal is listed in the NPPES registry with a primary specialty of Critical Care Medicine (Internal Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Mauricio Villarreal located?
- Mauricio Villarreal's practice location on file with NPPES is 4440w 95th St, Oak Lawn, IL 60453-2600.
- What is Mauricio Villarreal's phone number?
- The practice phone number listed in the NPPES registry for Mauricio Villarreal is (708) 684-5673.
- Does Mauricio Villarreal accept Medicare?
- Mauricio Villarreal is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mauricio Villarreal's NPI active?
- Yes — Mauricio Villarreal's NPI (1770978777) is active in the NPPES registry as of the last update on 2022-08-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.