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

Denise Lam Mah, FNP-BC

Individual provider Enterostomal Therapy Registered Nurse · NPI 1083114508

Denise Lam Mah, FNP-BC is a Nurse Practitioner in Fontana, California. Qualified in 2017, 9 years ago. Practices with City of Hope Medical Foundation, a 959-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in California.

Years since qualifying
9
Licensed in
CA
In the registry since
2018
Specialties on file
2
What do these letters mean?
FNP-BC — Family Nurse Practitioner, Board Certified
A family nurse practitioner certified by the ANCC.

See every abbreviation used in this directory →

Practice location Address checks out

9961 Sierra Ave
Fontana, CA 92335-6720
Phone: (909) 396-7812
Show map & directions

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

Additional practice locations (1)

  • 1500 Duarte Rd, Duarte, CA 91010-3012 — (626) 256-4673

Specialties & licences

Family Nurse Practitioner (primary) Taxonomy 363LF0000X · Licence 95008068 (CA)
Enterostomal Therapy Registered Nurse Taxonomy 163WE0900X · Licence 95008068 (CA)

Record details

NPI number1083114508
Entity typeIndividual (Type 1)
GenderFemale
Credentials FNP-BC
Sole proprietorYes
NPI enumeratedFebruary 21, 2018
Last updated in NPPESMay 24, 2021
Certification dateMay 24, 2021

Medicare enrollment

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

Medicare specialtyNURSE PRACTITIONER
Medical schoolOTHER
Graduated 2017 (9 years in practice)
Group practice City Of Hope Medical Foundation — 959 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare