Quick answers
- Does Aaron Guajardo Jr. accept Medicare assignment?
- Yes. Medicare's clinician data says Aaron Guajardo Jr. accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Aaron Guajardo Jr. see?
- In 2024, CMS data shows 1,783 Original Medicare patients and 3,317 services for Aaron Guajardo Jr.. This counts Original Medicare only and measures volume, not quality.
- What is Aaron Guajardo Jr.'s NPI number?
- 1487622874. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Aaron Guajardo Jr., data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 1,783 |
|---|---|
| Services billed to Medicare | 3,317 |
| Different services or procedures | 84 |
| Participating Medicare provider | Yes |
| Average age of these patients | 72 |
Most frequent services
- Screening mammography (77067)848 services
- Screening 3d breast mammography (77063)846 services
- X-ray of chest, 1 view (71045)471 services
- Diagnostic digital breast tomosynthesis, unilateral or bilateral (list separately in addition to 77065 or 77066) (G0279)178 services
- X-ray of chest, 2 views (71046)151 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure75%
- High cholesterol75%
- Arthritis51%
- Diabetes43%
- Chronic kidney disease42%
- Heart failure32%
Hospitals where Aaron Guajardo Jr. works
Medicare's Facility Affiliation Data lists Aaron Guajardo Jr. at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Advocate Christ Hospital & Medical CenterOak Lawn, IL · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 140208
- Advocate Trinity HospitalChicago, IL · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 140048
Practice locations
Addresses where Aaron Guajardo Jr. is enrolled with Medicare (CMS data updated October 2, 2026).
- 17800 Kedzie AveHazel Crest, IL 60429 (708) 684‑5340
- 4440 W 95th StOak Lawn, IL 60453 (708) 684‑8000
Group practices
Medicare enrollment lists Aaron Guajardo Jr. as a member of these groups (CMS data updated October 2, 2026).
- Advocate Health and Hospitals Corporation3,118 clinicians in the group
- Integrated Imaging Consultants LLC159 clinicians in the group
Specialties
- Diagnostic Radiologyprimary
Other radiologists in Illinois
Clinicians with the same Medicare primary specialty in Illinois — not a recommendation.
Other clinicians in Advocate Health and Hospitals Corporation
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Texas Medical Branch At Galveston |
| Graduation year | 1995 (31 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1487622874 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians