DR. NANCY ELIZABETH MASON MD
NPI 1649312067
Obstetrics & Gynecology in Palo Alto, CA

Q: What is Nancy Mason's NPI number?

The NPI number for Nancy Mason is 1649312067. It was assigned to this individual provider in the NPPES registry on February 13, 2007.

Q: What is Nancy Mason's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.

Q: When was this NPI record last updated?

The NPPES record for Nancy Mason was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since February 13, 2007PECOS EnrolledAccepts Medicare Assignment

1101 WELCH RD, SUITE A8, PALO ALTO, CA 94304(650) 329-1293(650) 329-1317 Get Directions Write a Review

NPPES record last updated: July 8, 2007. Verified against the NPPES registry weekly; last sync: August 16, 2026.

On this page

About Dr. Nancy Elizabeth Mason Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. NANCY ELIZABETH MASON MD (NPI 1649312067) is an individual obstetrics & gynecology provider in Palo Alto, California, licensed in California (G38836) and active in the NPI registry since February 2007. She is enrolled in Medicare PECOS and is a graduate of Stanford University School Of Medicine (1977).

NPPES Registry Identity

NPI1649312067

Entity TypeIndividualFemale

Primary Taxonomy207V00000X

Provider Legal NameDR. NANCY ELIZABETH MASONCredential: MD

Location Address1101 WELCH RD, SUITE A8Palo Alto, CA 94304

Mailing Address1101 Welch Rd, Suite A8Palo Alto, CA 94304 · (650) 329-1293 · Fax (650) 329-1317

Phone(650) 329-1293

Fax(650) 329-1317

Sole ProprietorNo

Medical School CMSStanford University School Of MedicineGraduated 1977

Enumeration DateFebruary 13, 2007

Last NPPES UpdateJuly 8, 2007

✔ NPI 1649312067 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyObstetrics & GynecologyAllopathic & Osteopathic Physicians

Taxonomy Code207V00000X

License✔ Licensed in CA · G38836

Definition

An obstetrician/gynecologist possesses special knowledge, skills and professional capability in the medical and surgical care of the female reproductive system and associated disorders. This physician serves as a consultant to other physicians and as a primary physician for women.

1101 WELCH RD, Palo Alto, CA 94304

Open in Google Maps ↗

Other Identifiers 1

Medicare UPINA47616

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Nancy Elizabeth Mason Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID4385673789

PECOS Enrollment IDI20050805000569

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 2

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Cervical or vaginal cancer screening; pelvic and clinical breast examination G0101

This procedure involves checking for health issues in the lower abdomen and chest area. It helps identify early signs of certain conditions, increasing the chance for successful treatment. It's a routine check-up that's important for maintaining good health.

19 services19 patients

Screening papanicolaou smear; obtaining, preparing and conveyance of cervical or vaginal smear to laboratory Q0091

A Papanicolaou smear, often called a Pap smear, is a test to check for changes in cells. A small sample is gently collected from the lower region and sent to a lab for examination. This helps in early detection of potential health issues.

13 services13 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94304 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$156.67 typical visit price

range $70.37 – $206.04

Typical copayment $39.16 (range $17.59 – $51.51)

Most-billed visit code 99204

Established Patient

$86.56 typical visit price

range $23.96 – $169.60

Typical copayment $21.64 (range $5.99 – $42.40)

Most-billed visit code 99213

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MS. COLEEN TRAVERS LCSW, ACSW

Social Worker (Clinical)

1101 WELCH RD, SUITE A-1, MC 5776
PALO ALTO, CA 94304

Santa Clara County (650) 736-2613

HARVEY, BALL & SHARRON MDS, INC

Pediatrics

1101 WELCH RD, SUITE A1
PALO ALTO, CA 94304

Santa Clara County (650) 329-0300

DR. HAILEN MAK MD

Allergy & Immunology (Allergy)

1101 WELCH RD, SUITE A-2
PALO ALTO, CA 94304

Santa Clara County (650) 322-3847

ROBERT EDWARD MINDELZUN M.D.

Radiology (Diagnostic Radiology)

1101 WELCH RD
PALO ALTO, CA 94304

Santa Clara County (650) 723-6345

DR. PETER CRAIG CASSINI M.D.

Psychiatry & Neurology (Neurology)

1101 WELCH RD, SUITE C-5
PALO ALTO, CA 94304

Santa Clara County (650) 324-4300

DR. BRUCE T ADORNATO M.D.

Psychiatry & Neurology (Neurology)

1101 WELCH RD, SUITE C5
PALO ALTO, CA 94304

Santa Clara County (650) 324-4300

DR. JELENA VUKICEVIC MD

Pediatrics

1101 WELCH RD, SUITE A1
PALO ALTO, CA 94304

Santa Clara County (650) 329-0300

FREDERIC LUSKIN

Marriage & Family Therapist

1101 WELCH RD, SUITE A6
PALO ALTO, CA 94304

Santa Clara County (650) 498-5566

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Nancy Mason's NPI number?

The NPI number for Nancy Mason is 1649312067. It was assigned to this individual provider in the NPPES registry on February 13, 2007.

Where is Nancy Mason located?

Nancy Mason practices at 1101 Welch Rd Suite A8, Palo Alto, CA 94304. The listed phone number is (650) 329-1293.

What is Nancy Mason's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.

Is Nancy Mason enrolled in Medicare?

Yes. Nancy Mason is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

When was this NPI record last updated?

The NPPES record for Nancy Mason was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.