Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Walter L Longo, MD

Individual provider Hematology & Oncology Physician · NPI 1629044649

Walter L Longo, MD is a Hematology/Oncology in Milwaukee, Wisconsin. Graduated from University of Nebraska College of Medicine in 1977, 49 years ago. Practices with The Medical College of Wisconsin Inc, a 2,093-clinician group, works from 2 locations, accepts Medicare assignment and offers telehealth. Licensed in Wisconsin.

Years since qualifying
49
Trained at
University of Nebraska College of Medicine
Licensed in
WI
In the registry since
2006
Specialties on file
3
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

9200 W Wisconsin Ave
Milwaukee, WI 53226
Phone: (414) 805-4600
Fax: (414) 805-6805
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 4805 S Moorland Rd, New Berlin, WI 53151-7401 — (262) 798-7200

Specialties & licences

Hematology & Oncology Physician (primary) Taxonomy 207RH0003X · Licence 24712 (WI)
Medical Oncology Physician Taxonomy 207RX0202X · Licence 24712 (WI)
Hematology (Internal Medicine) Physician Taxonomy 207RH0000X · Licence 24712 (WI)

Record details

NPI number1629044649
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedFebruary 28, 2006
Last updated in NPPESAugust 5, 2022
Certification dateAugust 5, 2022
Mailing address9200 W Wisconsin Ave, Milwaukee, WI 53226-3522

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyHEMATOLOGY/ONCOLOGY
Medical schoolUNIVERSITY OF NEBRASKA COLLEGE OF MEDICINE
Graduated 1977 (49 years in practice)
Group practice The Medical College Of Wisconsin Inc — 2093 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations3 on file with Medicare

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