DR. GONZALO A. II AILLON (D.O.) – Internal Medicine Physician, NPI 1598790644
Internal Medicine Physician
Main info
Profile Insights
NPPES metrics only — not quality of care.
Provider Addresses for DR. GONZALO A. II AILLON (D.O.)
4545 Fuller Dr
Suite 325
Irving, TX 750386530
Phone: (214) 536-3355
Fax: (972) 870-5512
Type: Location
1605 N State Highway 118 Ste B
Alpine, TX 798302150
Phone: (432) 837-4812
Type: Location
Rio Grande State Center, 1401, South Rangerville Road, Harlingen, Texas, 78552, United States
HARLINGEN, TX 785527638
Phone: (956) 430-2408
Type: Location
1138, Bradley Drive, Woodland Hills, Duncanville, Dallas County, Texas, 75137, United States
DUNCANVILLE, TX 751374224
Phone: (214) 536-3355
Fax: (972) 572-2258
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
No Open Payments data available for this provider.
This can happen when there are no reportable CMS Open Payments records.
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2004-04-19
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20040419000505 | I | Internal Medicine | TX | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
No Medicare fee-for-service utilization data available for this provider in our database.
Insurance plans in this area (ZIP 75038)
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