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DR. MARY UMAHI OBASI OLOMU MD
NPI 1982117628
Internal Medicine in Stanford, CA

Active since November 15, 2017PECOS Enrolled
269 CAMPUS DR # MC5151, STANFORD, CA 94305(650) 723-2300 Get Directions Write a Review

NPPES record last updated: January 14, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Jan 14, 2026, Jun 13, 2023, Nov 15, 2017 (3 updates tracked since 2017).

About Dr. Mary Umahi Obasi Olomu Md NPPES

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

DR. MARY UMAHI OBASI OLOMU MD (NPI 1982117628) is an individual internal medicine provider in Stanford, California, licensed in California (A185215) and active in the NPI registry since November 2017. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1982117628
Entity TypeIndividualFemale
Primary Taxonomy207R00000X
Provider Legal NameDR. MARY UMAHI OBASI OLOMUCredential: MD
Location Address269 CAMPUS DR # MC5151Stanford, CA 94305-5101
Mailing Address269 Campus Dr # Mc5151Stanford, CA 94305-5101
Phone(650) 723-2300
Sole ProprietorNo
Enumeration DateNovember 15, 2017
Last NPPES UpdateJanuary 14, 20263 updates tracked since enumeration
NPPES CertifiedJanuary 14, 2026
✔ NPI 1982117628 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in CA · A185215
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
269 CAMPUS DR # MC5151, Stanford, CA 94305
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Other Names 1

Former Name (1)Dr. Mary Umahi Obasi Md

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Mary Umahi Obasi Olomu Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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 94305 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
$121.77 typical visit price
range $23.96 – $169.60
Typical copayment $30.44 (range $5.99 – $42.40)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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 Mary Olomu's NPI number?

The NPI number for Mary Olomu is 1982117628. It was assigned to this individual provider in the NPPES registry on November 15, 2017. The provider is also known as Dr. Mary Umahi Obasi MD.

Where is Mary Olomu located?

Mary Olomu practices at 269 Campus Dr # Mc5151, Stanford, CA 94305. The listed phone number is (650) 723-2300.

What is Mary Olomu's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Mary Olomu enrolled in Medicare?

Yes. Mary Olomu is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Mary Olomu was last updated on January 14, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 months 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.