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

Leon Fogelfeld, MD

Individual provider Endocrinology, Diabetes & Metabolism Physician · NPI 1699732305

Leon Fogelfeld, MD is an Endocrinology in Chicago, Illinois. Qualified in 1975, 51 years ago. Practices with County of Ventura, a 274-clinician group, works from 3 locations, accepts Medicare assignment and offers telehealth. Licensed in California and Illinois.

Years since qualifying
51
Licensed in
CA, IL
In the registry since
2006
Specialties on file
2
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

1725 W Harrison St Ste 250
Chicago, IL 60612-3841
Phone: (312) 942-6163
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (2)

  • 125 W Thousand Oaks Blvd Ste 300, Thousand Oaks, CA 91360-4460 — (805) 418-9100
  • 300 Hillmont Ave Ste 502, Ventura, CA 93003-1651 — (805) 652-6222

Specialties & licences

Endocrinology, Diabetes & Metabolism Physician (primary) Taxonomy 207RE0101X · Licence C175830 (CA)
Endocrinology, Diabetes & Metabolism Physician Taxonomy 207RE0101X · Licence 036-078595 (IL)

Record details

NPI number1699732305
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 27, 2006
Last updated in NPPESNovember 1, 2023
Certification dateNovember 1, 2023

Medicare enrollment

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

Medicare specialtyENDOCRINOLOGY
Medical schoolOTHER
Graduated 1975 (51 years in practice)
Group practice County Of Ventura — 274 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

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