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

Franciscus Marius Delen, MD

Individual provider Pulmonary Disease Physician · NPI 1770563041

Franciscus Marius Delen, MD is a Critical Care (Intensivists) in San Francisco, California. Graduated from University of California, Irvine, California College of Medicine in 1992, 34 years ago. Practices with Sutter Bay Medical Foundation, a 3,762-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
34
Trained at
University of California, Irvine, California College of Medicine
Licensed in
CA
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

45 Castro St 200
San Francisco, CA 94114-1010
Phone: (415) 252-1090
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Critical Care Medicine (Internal Medicine) Physician (primary) Taxonomy 207RC0200X · Licence 162151 (CA)
Pulmonary Disease Physician Taxonomy 207RP1001X · Licence 162151 (CA)
Internal Medicine Physician Taxonomy 207R00000X · Licence 162151 (CA)

Record details

NPI number1770563041
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedJanuary 20, 2006
Last updated in NPPESJuly 13, 2007

Medicare enrollment

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

Medicare specialtyCRITICAL CARE (INTENSIVISTS)
Also practisesINTERNAL MEDICINE, PULMONARY DISEASE
Medical schoolUNIVERSITY OF CALIFORNIA, IRVINE, CALIFORNIA COLLEGE OF MEDICINE
Graduated 1992 (34 years in practice)
Group practice Sutter Bay Medical Foundation — 3762 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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