Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Dr. Allison Margaret Herzfeld, MD, PHD

Individual provider Internal Medicine Physician · NPI 1639874423

Dr. Allison Margaret Herzfeld, MD, PHD is an Internal Medicine Physician in Madison, Wisconsin. Licensed in Wisconsin. Registered with an NPI since 2023.

Licensed in
WI
In the registry since
2023
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.
PHD — Doctor of Philosophy
A research doctorate. In healthcare it usually sits alongside a clinical licence.

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Practice location Address checks out

600 Highland Ave
Madison, WI 53792-0001
Phone: (608) 263-6400
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 87330-20 (WI)

Record details

NPI number1639874423
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD , PHD
Sole proprietorNo
NPI enumeratedApril 3, 2023
Last updated in NPPESJune 10, 2026
Certification dateJune 10, 2026

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