Nancy Hernandez, DO
NPI 1831305879 · Nephrology Physician · Fullerton, CA
Enrolled with Medicare as Practitioner - Nephrology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Nancy Hernandez, DO is a Nephrology Physician provider in Fullerton, CA (NPI 1831305879).
Provider details
- NPI number
- 1831305879
- Entity type
- Individual
- Primary specialty
- Nephrology PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Female
- Sole proprietor
- No
- License
- 20A9829 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 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
2,870 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 653 | $78 |
| Management Using the Results of Remote Vital Sign Monitoring Per Calendar Month, First 20 Minutes99457 | 427 | $52 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 351 | $110 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 351 | $118 |
| Dialysis Services, 4 Or More Physician Visits Per Month (20 Years Or Older)90960 | 243 | $345 |
| Remote Monitoring of Physiologic Parameters, Initial Supply of Devices With Daily Recordings Or Programmed Alerts Transmission, Each 30 Days |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 46 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Calcitriol | 159 | 38 |
| Allopurinol | 124 | 39 |
| Sevelamer Carbonate | 101 | 30 |
| Parenteral Amino Acid 20% No.1brand: Prosol | 99 | — |
| Furosemide | 98 | 35 |
| Sodium Zirconium Cyclosilicatebrand: Lokelma | 96 | 27 |
| Hydralazine Hcl | 84 | 27 |
| Calcium Acetate |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$486 across 21 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
- 2007-05-15
- Last updated
- 2023-11-21
- Certified
- 2023-11-21
Frequently asked questions
- What is Nancy Hernandez's NPI number?
- Nancy Hernandez's National Provider Identifier (NPI) is 1831305879, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nancy Hernandez's specialty?
- Nancy Hernandez is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
- Where is Nancy Hernandez located?
- Nancy Hernandez's practice location on file with NPPES is 100 E Valencia Mesa Dr Ste 100, Fullerton, CA 92835-3816.
- What is Nancy Hernandez's phone number?
- The practice phone number listed in the NPPES registry for Nancy Hernandez is (714) 992-5581.
- Does Nancy Hernandez accept Medicare?
- Nancy Hernandez is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Nancy Hernandez's NPI active?
- Yes — Nancy Hernandez's NPI (1831305879) is active in the NPPES registry as of the last update on 2023-11-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.