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HANNAH O'BRIEN PA-C
NPI 1780216598
Physician Assistant in Redwood City, CA

Active since February 10, 2020PECOS EnrolledAccepts Medicare Assignment
91.04/100
CMS Quality Rating
18 SPINNAKER PL, REDWOOD CITY, CA 94065(925) 382-4824 Get Directions Write a Review

NPPES record last updated: May 20, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: May 20, 2026, Aug 6, 2020, Feb 10, 2020 (3 updates tracked since 2020).

About Hannah O'brien Pa-c NPPES

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

HANNAH O'BRIEN PA-C (NPI 1780216598) is an individual physician assistant in Redwood City, California, licensed in California (PA58222) and active in the NPI registry since February 2020. She is enrolled in Medicare PECOS and is a graduate of University Of Southern California Keck School Of Medicine (2020).

NPPES Registry Identity

NPI1780216598
Entity TypeIndividualFemale
Primary Taxonomy363A00000X
Provider Legal NameHANNAH O'BRIENCredential: PA-C
Location Address18 SPINNAKER PLRedwood City, CA 94065-1294
Mailing Address18 Spinnaker PlRedwood City, CA 94065-1294 · (925) 382-4824
Phone(925) 382-4824
Sole ProprietorNo
Medical School CMSUniversity Of Southern California Keck School Of MedicineGraduated 2020
Enumeration DateFebruary 10, 2020
Last NPPES UpdateMay 20, 20263 updates tracked since enumeration
NPPES CertifiedMay 20, 2026
✔ NPI 1780216598 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPhysician AssistantPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363A00000X
License✔ Licensed in CA · PA58222
Definition
A physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and is practicing within the scope of that license. Physician assistants are formally trained to perform many of the routine, time-consuming tasks a physician can do. In some states, they may prescribe medications. They take medical histories, perform physical exams, order lab tests and x-rays, and give inoculations. Most states require that they work under the supervision of a physician.
18 SPINNAKER PL, Redwood City, CA 94065
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Other Names 1

Other Name (5)Hannah Jessalyn Wall

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

Hannah O'brien Pa-c 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 ID5799103032
PECOS Enrollment IDI20200917002391
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 3

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.

Emergency department visit with high level of medical decision making 99285
An emergency department visit for severe conditions is when you urgently seek medical help due to serious health issues. These could be severe injuries, breathing problems, unbearable pain, or sudden severe illness. Doctors and nurses will provide immediate care to stabilize your condition.
117 services114 patients
Emergency department visit with moderate level of medical decision making 99284
An emergency department visit for a high-severity issue means you're experiencing a serious health problem that needs immediate attention. This could be a severe injury, serious illness, or life-threatening condition. Medical professionals will provide urgent care to stabilize your condition.
104 services102 patients
Emergency department visit with low level of medical decision making 99283
An emergency department visit for a problem of moderate severity involves immediate medical attention for issues like minor fractures, burns, or high fever. The healthcare team will assess your condition, provide necessary treatment, and may suggest further tests or admission if required.
85 services81 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94065 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
$104.51 typical visit price
range $69.00 – $202.35
Typical copayment $26.12 (range $17.25 – $50.58)
Most-billed visit code 99203
Established Patient
$84.91 typical visit price
range $23.44 – $166.46
Typical copayment $21.22 (range $5.86 – $41.61)
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.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

91.04/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality82.13
Promoting Interoperability100
Improvement Activities40
Cost64.1

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 Hannah O'brien's NPI number?

The NPI number for Hannah O'brien is 1780216598. It was assigned to this individual provider in the NPPES registry on February 10, 2020. The provider is also known as Hannah Jessalyn Wall.

Where is Hannah O'brien located?

Hannah O'brien practices at 18 Spinnaker Pl, Redwood City, CA 94065. The listed phone number is (925) 382-4824.

What is Hannah O'brien's specialty?

The primary specialty registered for this NPI is Physician Assistant with taxonomy code 363A00000X.

Is Hannah O'brien enrolled in Medicare?

Yes. Hannah O'brien 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 Hannah O'brien was last updated on May 20, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.