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

Dr. Nancy Elizabeth Mason, MD

Individual provider Obstetrics & Gynecology Physician · NPI 1649312067

Dr. Nancy Elizabeth Mason, MD practises Obstetrics/Gynecology in Palo Alto, California. Graduated from Stanford University School of Medicine in 1977, 49 years ago. Practices with Lpch Medical Group Div of Lucile, a 337-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
49
Trained at
Stanford University School of Medicine
Licensed in
CA
In the registry since
2007
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

1101 Welch Rd Ste A8
Palo Alto, CA 94304 Not confirmed with CMS for 19 years — call before visiting
Phone: (650) 329-1293
Fax: (650) 329-1317
Show map & directions

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

Specialties & licences

Obstetrics & Gynecology Physician (primary) Taxonomy 207V00000X · Licence G38836 (CA)

Record details

NPI number1649312067
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedFebruary 13, 2007
Last updated in NPPESJuly 8, 2007

Medicare enrollment

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

Medicare specialtyOBSTETRICS/GYNECOLOGY
Medical schoolSTANFORD UNIVERSITY SCHOOL OF MEDICINE
Graduated 1977 (49 years in practice)
Group practice Lpch Medical Group Div Of Lucile — 337 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients26
Services billed 41 a service is one billed item, such as a visit, a test or a procedure
Average patient age72

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Colleagues at Lpch Medical Group Div of Lucile

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 337 clinicians in the practice; 12 are shown here.

Other providers in Palo Alto