Active NPI
Fernando Cristobal Diaz, MD
- Hematology & Oncology Physician
- McAllen, TX
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Hematology & Oncology Physician
- License
- V2724
- Practice address
- 5137 Lost Creek LN
McAllen, TX 78504-9783 - Phone
- (919) 966-1996
- Fax
- (919) 966-6735
- NPI assigned
- May 14, 2017
- Sex
- Male
- Sole proprietor
- Yes
NPPES NPI Registry
Registry information is reported by the provider to CMS and is not verified. About this source
Specialties & licenses 1
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Hematology & Oncology Physician | 207RH0003X | V2724 | TX | Primary |
Addresses
Primary practice location
5137 Lost Creek LN
McAllen, TX 78504-9783
Mailing address
5137 Lost Creek LN
McAllen, TX 78504-9783
Phone (919) 966-1996
Other practice location 1
338 Deerfield Rd
Boone, NC 28607-5008
Phone (828) 262-4100
Medicare participation
Medicare enrollment files- Medicare fee-for-service enrollment
- Enrolled in TX
- Eligible to order & refer
- Part B services: Yes
- Medical equipment: Yes
- Home health: Yes
- Power mobility devices: Yes
- Hospice: Yes
Enrollment records 1
Care Compare profile
Medicare Care Compare- Specialty
- Hematology/Oncology
- Education
- Other, 2011
- Medicare assignment
- Accepts the Medicare-approved amount as payment in full
- Group practices
Practice addresses (Care Compare)
1901 S Col Rowe Blvd
McAllen, TX 78503-1271
Phone (956) 687-5150
Hospital & facility affiliations
Merit-based Incentive Payment System (MIPS)
- Final score
- 53.49 of 100
- Quality
- 45.59
- Promoting interoperability
- 0
- Improvement activities
- 40
- Cost
- 77.2
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Enrolled
- Credentials
- Doctor of Medicine
Practice roles
| Organization | Specialty | Status | New patients |
|---|---|---|---|
| Texas Oncology PA | Hematology & Oncology | Current | Accepting new patients |
| Texas Oncology PA | Hematology & Oncology | Current | Accepting new patients |
Locations
7848 Gateway Blvd E
El Paso, TX 79915
Phone (915) 599-1313
2026 S Jackson St
Jacksonville, TX 75766
Phone (903) 541-4500
1901 S Col Rowe Blvd
McAllen, TX 78503
Phone (956) 687-5150
Interoperability endpoints
- fernando.diaz@txo.ikm.direct-ci.com
Organizations & group practices 2
Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships, National Provider Directory roles and organizations whose NPPES authorized official is this provider.
Hospital & facility affiliations 6
Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.
-
dba Rio Grande Regional Hospital
- General Acute Care Hospital
- McAllen, TX
- NPI 1619924719
-
dba DHR Health
- General Acute Care Hospital
- Edinburg, TX
- NPI 1053317362
-
dba DHR Health
- Transplant Surgery Physician
- McAllen, TX
- NPI 1104338052
Hospital
-
dba South Texas Health System - Heart
- Cardiac Rehabilitation Clinic/Center
- McAllen, TX
- NPI 1043849425
Hospital
-
dba South Texas Health System
- Psychiatric Hospital Unit
- Edinburg, TX
- NPI 1053301754
-
dba South Texas Health System
- General Acute Care Hospital
- Edinburg, TX
- NPI 1770573586
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1494720000000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1787270400000",
"number": "1902333545",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "5137 LOST CREEK LN",
"city": "MCALLEN",
"state": "TX",
"postal_code": "785049783",
"telephone_number": "919-966-1996",
"fax_number": "919-966-6735"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "5137 LOST CREEK LN",
"city": "MCALLEN",
"state": "TX",
"postal_code": "785049783",
"telephone_number": "919-966-1996",
"fax_number": "919-966-6735"
}
],
"practiceLocations": [
{
"address_1": "338 Deerfield Rd",
"address_purpose": "LOCATION",
"city": "Boone",
"state": "NC",
"postal_code": "286075008",
"country_code": "US",
"telephone_number": "828-262-4100",
"country_name": "United States",
"address_type": "DOM"
}
],
"basic": {
"last_name": "DIAZ",
"first_name": "FERNANDO",
"middle_name": "CRISTOBAL",
"name_prefix": "Dr.",
"credential": "MD",
"sole_proprietor": "YES",
"sex": "M",
"enumeration_date": "2017-05-14",
"last_updated": "2026-08-21",
"certification_date": "2026-08-21",
"status": "A"
},
"taxonomies": [
{
"code": "207RH0003X",
"taxonomy_group": "",
"desc": "Internal Medicine, Hematology & Oncology",
"state": "TX",
"license": "V2724",
"primary": true
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}Other providers in McAllen, TX
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Aug 21, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
- Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
- Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
- National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.