Marlen Diaz, APRN-CNP
NPI 1437970126 · Acute Care Nurse Practitioner · San Antonio, TX
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marlen Diaz, APRN-CNP is a Acute Care Nurse Practitioner provider in San Antonio, TX (NPI 1437970126).
Provider details
- NPI number
- 1437970126
- Entity type
- Individual
- Primary specialty
- Acute Care Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- APRN-CNP
- Sex
- Female
- Sole proprietor
- No
- License
- 1178704 (TX)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
1 yr in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
4 documented practice locations
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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 methodology.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$22 across 1 record (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 (3)
- 701 Secretary DrArlington, TX 76015-1623Phone: (817) 617-2040Fax: (817) 617-2055
- 1441 N Beckley AveDallas, TX 75203-1201Phone: (214) 947-5000Fax: (214) 947-5040
- 559 E Ovilla RdRed Oak, TX 75154-3505Phone: (214) 286-6565Fax: (817) 533-6015
Registry dates
- Enumerated
- 2024-10-24
- Last updated
- 2026-06-02
- Certified
- 2026-06-02
Frequently asked questions
- What is Marlen Diaz's NPI number?
- Marlen Diaz's National Provider Identifier (NPI) is 1437970126, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marlen Diaz's specialty?
- Marlen Diaz is listed in the NPPES registry with a primary specialty of Acute Care Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Marlen Diaz located?
- Marlen Diaz's practice location on file with NPPES is 215 N San Saba Ste 206, San Antonio, TX 78207-3120.
- What is Marlen Diaz's phone number?
- The practice phone number listed in the NPPES registry for Marlen Diaz is (210) 615-6626.
- Does Marlen Diaz accept Medicare?
- Marlen Diaz is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marlen Diaz's NPI active?
- Yes — Marlen Diaz's NPI (1437970126) is active in the NPPES registry as of the last update on 2026-06-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.