Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

XI DU PLUMMER MD, PHD
NPI 1396205373
Obstetrics & Gynecology - Maternal & Fetal Medicine in Palo Alto, CA

Q: What is Xi Plummer's NPI number?

The NPI number for Xi Plummer is 1396205373. It was assigned to this individual provider in the NPPES registry on March 25, 2019.

Q: What is Xi Plummer's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology, specializing in Maternal & Fetal Medicine, with taxonomy code 207VM0101X.

Q: When was this NPI record last updated?

The NPPES record for Xi Plummer was last updated on July 21, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 33 days 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 March 25, 2019PECOS Enrolled

725 WELCH RD, PALO ALTO, CA 94304(650) 497-8000 Get Directions Write a Review

NPPES record last updated: July 21, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Jul 21, 2026, Jul 24, 2023, May 29, 2023 (3 updates tracked since 2023).

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About Xi Du Plummer Md, Phd NPPES

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

XI DU PLUMMER MD, PHD (NPI 1396205373) is an individual maternal & fetal medicine provider in Palo Alto, California, licensed in California (A186616) and active in the NPI registry since March 2019. She is enrolled in Medicare PECOS and is a graduate of University Of Michigan Medical School (2019).

NPPES Registry Identity

NPI1396205373

Entity TypeIndividualFemale

Primary Taxonomy207VM0101X

Provider Legal NameXI DU PLUMMERCredential: MD, PHD

Location Address725 WELCH RDPalo Alto, CA 94304-1601

Mailing Address725 Welch RdPalo Alto, CA 94304-1601 · (650) 497-8000

Phone(650) 497-8000

Sole ProprietorYes

Medical School CMSUniversity Of Michigan Medical SchoolGraduated 2019

Enumeration DateMarch 25, 2019

Last NPPES UpdateJuly 21, 20263 updates tracked since enumeration

NPPES CertifiedJuly 21, 2026

✔ NPI 1396205373 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyObstetrics & Gynecology · Maternal & Fetal MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207VM0101X

License✔ Licensed in CA · A186616

Definition

An obstetrician/gynecologist who cares for, or provides consultation on, patients with complications of pregnancy. This specialist has advanced knowledge of the obstetrical, medical and surgical complications of pregnancy and their effect on both the mother and the fetus. The specialist also possesses expertise in the most current diagnostic and treatment modalities used in the care of patients with complicated pregnancies.

Also ListedObstetrics & GynecologyTaxonomy 207V00000X · License A186616 (CA)

Also ListedObstetrics & Gynecology · ObstetricsTaxonomy 207VX0000X · License A186616 (CA)

725 WELCH RD, Palo Alto, CA 94304

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Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Xi Du Plummer Md, Phd is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID8022344316

PECOS Enrollment IDI20260611004098

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.

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.

EIRI INENAGA MS, OTR/L

Occupational Therapist (Pediatrics)