Eileen Montalvan Fernandez, MD
NPI 1437775400 · Endocrinology, Diabetes & Metabolism Physician · Tucson, AZ
Enrolled with Medicare as Practitioner - Endocrinology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Eileen Montalvan Fernandez, MD is a Endocrinology, Diabetes & Metabolism Physician provider in Tucson, AZ (NPI 1437775400).
Provider details
- NPI number
- 1437775400
- Entity type
- Individual
- Primary specialty
- Endocrinology, Diabetes & Metabolism PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
6 yrs in NPPES registry
- Profile completeness33% of score
83% of core fields populated
- Practice footprint20% of score
2 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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 8 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 71 | 33 |
| Semaglutidebrand: Ozempic | 25 | 12 |
| Metformin Hclbrand: Metformin Hcl Er | 19 | — |
| Empagliflozinbrand: Jardiance | 17 | — |
| Alendronate Sodium | 17 | — |
| Hydrocortisone | 16 | — |
| Dulaglutide |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,110 across 10 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
Additional practice locations (1)
- 1701 Veterans DrFlorence, AL 35630-4928Phone: (256) 629-1950
Registry dates
- Enumerated
- 2020-06-24
- Last updated
- 2023-08-01
- Certified
- 2023-08-01
Frequently asked questions
- What is Eileen Montalvan Fernandez's NPI number?
- Eileen Montalvan Fernandez's National Provider Identifier (NPI) is 1437775400, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Eileen Montalvan Fernandez's specialty?
- Eileen Montalvan Fernandez is listed in the NPPES registry with a primary specialty of Endocrinology, Diabetes & Metabolism Physician (Allopathic & Osteopathic Physicians).
- Where is Eileen Montalvan Fernandez located?
- Eileen Montalvan Fernandez's practice location on file with NPPES is 3838 N Campbell Ave Bldg 2, Tucson, AZ 85719-1454.
- What is Eileen Montalvan Fernandez's phone number?
- The practice phone number listed in the NPPES registry for Eileen Montalvan Fernandez is (520) 694-8888.
- Does Eileen Montalvan Fernandez accept Medicare?
- Eileen Montalvan Fernandez is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Eileen Montalvan Fernandez's NPI active?
- Yes — Eileen Montalvan Fernandez's NPI (1437775400) is active in the NPPES registry as of the last update on 2023-08-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.