Julia Diaz, APRN
NPI 1538531306 · Family Nurse Practitioner · Sulphur, OK
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Julia Diaz, APRN is a Family Nurse Practitioner provider in Sulphur, OK (NPI 1538531306).
Provider details
- NPI number
- 1538531306
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- APRN
- Sex
- Female
- Sole proprietor
- Yes
- License
- 90481 (OK)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Nursing Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
10 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
1,553 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. 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 .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 387 | $99 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 218 | $13 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 197 | $9 |
| Injection of Drug Or Substance Under Skin Or Into Muscle96372 | 127 | $11 |
| Automated Urinalysis Test81003 | 123 | $2 |
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 103 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 214 | 87 |
| Levothyroxine Sodium | 179 | 53 |
| Omeprazole | 176 | 55 |
| Semaglutidebrand: Ozempic | 119 | 22 |
| Amlodipine Besylate | 112 | 35 |
| Gabapentin | 108 | 37 |
| Lisinopril |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$157 across 8 records (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
Registry dates
- Enumerated
- 2015-10-20
- Last updated
- 2025-10-22
- Certified
- 2025-10-22
Frequently asked questions
- What is Julia Diaz's NPI number?
- Julia Diaz's National Provider Identifier (NPI) is 1538531306, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Julia Diaz's specialty?
- Julia Diaz is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Julia Diaz located?
- Julia Diaz's practice location on file with NPPES is 2011 W Broadway Ave, Sulphur, OK 73086-4221.
- What is Julia Diaz's phone number?
- The practice phone number listed in the NPPES registry for Julia Diaz is (580) 622-4482.
- Does Julia Diaz accept Medicare?
- Julia Diaz is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Julia Diaz's NPI active?
- Yes — Julia Diaz's NPI (1538531306) is active in the NPPES registry as of the last update on 2025-10-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.