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

Ji Won Ahn, MD

Individual provider MOHS-Micrographic Surgery Physician · NPI 1023460243

Ji Won Ahn, MD is a Dermatology in Walnut Creek, California. Graduated from Washington University School of Medicine in 2016, 10 years ago. Practices with Permanente Medical Group Inc, a 10,941-clinician group and accepts Medicare assignment. Licensed in Minnesota.

Years since qualifying
10
Trained at
Washington University School of Medicine
Licensed in
MN
In the registry since
2016
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

320 Lennon Ln Dept OF
Walnut Creek, CA 94598-2419
Phone: (925) 817-5678
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

MOHS-Micrographic Surgery Physician (primary) Taxonomy 207ND0101X · Licence 66941 (MN)

Record details

NPI number1023460243
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 12, 2016
Last updated in NPPESOctober 30, 2024
Certification dateOctober 30, 2024
Mailing address200 1st St Sw, Rochester, MN 55905-0001

Medicare enrollment

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

Medicare specialtyDERMATOLOGY
Also practisesMICROGRAPHIC DERMATOLOGIC SURGERY (MDS)
Medical schoolWASHINGTON UNIVERSITY SCHOOL OF MEDICINE
Graduated 2016 (10 years in practice)
Group practice Permanente Medical Group Inc — 10941 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Other providers in Walnut Creek