Mary Horowitz, MD
NPI 1356392195 · Hematology & Oncology Physician · Milwaukee, WI
Mary Horowitz, MD is a Hematology & Oncology Physician provider in Milwaukee, WI (NPI 1356392195).
Provider details
- NPI number
- 1356392195
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 24175 (WI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
20 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- 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.
$2,961 across 7 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
- 2006-05-15
- Last updated
- 2013-01-25
Frequently asked questions
- What is Mary Horowitz's NPI number?
- Mary Horowitz's National Provider Identifier (NPI) is 1356392195, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Horowitz's specialty?
- Mary Horowitz is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Mary Horowitz located?
- Mary Horowitz's practice location on file with NPPES is 9200 W Wisconsin Ave, Milwaukee, WI 53226-3522.
- What is Mary Horowitz's phone number?
- The practice phone number listed in the NPPES registry for Mary Horowitz is (414) 805-0700.
- Is Mary Horowitz's NPI active?
- Yes — Mary Horowitz's NPI (1356392195) is active in the NPPES registry as of the last update on 2013-01-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.