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

Dr. Catherine A Biren, MD

Individual provider Specialist · NPI 1124021035

Dr. Catherine A Biren, MD is a Dermatology in Modesto, California. Graduated from Northwestern University Womans Medical School in 1980, 46 years ago. Practices with Csi Medical Group, a 104-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in California.

Years since qualifying
46
Trained at
Northwestern University Womans Medical School
Licensed in
CA
In the registry since
2005
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

1324 Nelson Ave Ste B
Modesto, CA 95350-5341
Phone: (209) 524-9481
Fax: (209) 524-9486
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 9781 Blue Larkspur Ln Ste 100, Monterey, CA 93940-6509 — (831) 333-9008

Specialties & licences

Dermatology Physician (primary) Taxonomy 207N00000X · Licence G48190 (CA)
Specialist Taxonomy 174400000X · Licence GR0045780 (CA)

Record details

NPI number1124021035
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorYes
NPI enumeratedMay 24, 2005
Last updated in NPPESMarch 24, 2023
Certification dateMarch 24, 2023

Medicare enrollment

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

Medicare specialtyDERMATOLOGY
Medical schoolNORTHWESTERN UNIVERSITY WOMANS MEDICAL SCHOOL
Graduated 1980 (46 years in practice)
Group practice Csi Medical Group — 104 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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