Isabel Mendez, M.D.
NPI 1578944989 · Internal Medicine Physician · Milwaukee, WI
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Isabel Mendez, M.D. is a Internal Medicine Physician provider in Milwaukee, WI (NPI 1578944989).
Provider details
- NPI number
- 1578944989
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 125067506 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
11 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
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 · 4 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 32 | 14 |
| Metformin Hcl | 21 | — |
| Lisinopril | 18 | — |
| Amlodipine Besylate | 12 | — |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Additional practice locations (1)
- 2801 W Kinnickinnic River Pkwy Ste 170Milwaukee, WI 53215Phone: (414) 385-8600
Registry dates
- Enumerated
- 2015-06-11
- Last updated
- 2021-11-23
- Certified
- 2021-11-23
Frequently asked questions
- What is Isabel Mendez's NPI number?
- Isabel Mendez's National Provider Identifier (NPI) is 1578944989, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Isabel Mendez's specialty?
- Isabel Mendez is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Isabel Mendez located?
- Isabel Mendez's practice location on file with NPPES is 2801 W Kinnickinnic River Pkwy Ste 170, Milwaukee, WI 53215.
- What is Isabel Mendez's phone number?
- The practice phone number listed in the NPPES registry for Isabel Mendez is (414) 385-8600.
- Does Isabel Mendez accept Medicare?
- Isabel Mendez is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Isabel Mendez's NPI active?
- Yes — Isabel Mendez's NPI (1578944989) is active in the NPPES registry as of the last update on 2021-11-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.