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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. GONZALO A. AILLON II D.O.
NPI 1598790644
Internal Medicine in Harlingen, TX

Active since July 11, 2006PECOS Enrolled
1401 S RANGERVILLE RD, HARLINGEN, TX 78552(956) 430-2408 Get Directions Write a Review

NPPES record last updated: June 9, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Dr. Gonzalo A. Aillon Ii D.o. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. GONZALO A. AILLON II D.O. (NPI 1598790644) is an individual internal medicine provider in Harlingen, Texas, licensed in Texas (L2781) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS and maintains 3 additional practice locations.

NPPES Registry Identity

NPI1598790644
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. GONZALO A. AILLON IICredential: D.O.
Location Address1401 S RANGERVILLE RDHarlingen, TX 78552-7638
Mailing Address1138 Bradley DrDuncanville, TX 75137-4224 · (214) 536-3355 · Fax (972) 572-2258
Phone(956) 430-2408
Sole ProprietorNo
Enumeration DateJuly 11, 2006
Last NPPES UpdateJune 9, 2026
NPPES CertifiedJune 9, 2026
✔ NPI 1598790644 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in TX · L2781
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
1401 S RANGERVILLE RD, Harlingen, TX 78552
Open in Google Maps ↗

Secondary Practice Locations 3

Location 14400 Oak Park LnFort Worth, TX 76109-9534 · Phone (817) 985-7772 · Fax (817) 961-1577
Location 24545 Fuller Dr, Suite 325Irving, TX 75038-6530 · Phone (214) 536-3355 · Fax (972) 870-5512
Location 31605 N State Highway 118 Ste BAlpine, TX 79830-2150 · Phone (432) 837-4812

Other Identifiers 2

Medicaid158305602TX
Medicaid158305603TX

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross and Blue Shield of Texas.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Gonzalo A. Aillon Ii D.o. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 78552 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$126.40 typical visit price
range $54.84 – $166.88
Typical copayment $31.60 (range $13.71 – $41.72)
Most-billed visit code 99204
Established Patient
$97.05 typical visit price
range $17.52 – $136.11
Typical copayment $24.26 (range $4.38 – $34.02)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. LEAH B NUNEZ PHARMD
Pharmacist (Psychiatric)
1401 S RANGERVILLE RD
HARLINGEN, TX 78552
Cameron County (956) 364-8264
MS. DANAJI DZOARA GONZALEZ LCSW
Social Worker (Clinical)
1401 S RANGERVILLE RD
HARLINGEN, TX 78552
Cameron County (956) 322-7708
RIO GRANDE STATE CENTER
Clinic/Center (Health Service)
1401 S RANGERVILLE RD
HARLINGEN, TX 78552
Cameron County (956) 364-8375
DR. MICHELLE SALINAS PHARM D
Pharmacist
1401 S RANGERVILLE RD
HARLINGEN, TX 78552
Cameron County (956) 364-8741
SOUTH TEXAS HEALTH CARE SYSTEM
Pharmacy
1401 S RANGERVILLE RD, OPC PHARMACY - BLDG 504
HARLINGEN, TX 78552
Cameron County (956) 364-8741
J. DON WATHERS M.D.
Psychiatry & Neurology (Psychiatry)
1401 S RANGERVILLE RD
HARLINGEN, TX 78552
Cameron County (956) 364-8456
MRS. VERONICA HAYES R.D.
Dietitian, Registered
1401 S RANGERVILLE RD
HARLINGEN, TX 78552
Cameron County (956) 364-8782
HEALTH AND HUMAN SERVICES COMMISSION
Pharmacy (Long Term Care Pharmacy)
1401 S RANGERVILLE RD
HARLINGEN, TX 78552
Cameron County (956) 425-8900

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Gonzalo Aillon's NPI number?

The NPI number for Gonzalo Aillon is 1598790644. It was assigned to this individual provider in the NPPES registry on July 11, 2006.

Where is Gonzalo Aillon located?

Gonzalo Aillon practices at 1401 S Rangerville Rd, Harlingen, TX 78552. The listed phone number is (956) 430-2408.

What is Gonzalo Aillon's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Gonzalo Aillon enrolled in Medicare?

Yes. Gonzalo Aillon is registered in the Medicare PECOS enrollment system.

What insurance does Gonzalo Aillon accept?

Health plans from Blue Cross and Blue Shield of Texas list Gonzalo Aillon as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Gonzalo Aillon was last updated on June 9, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 59 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.