HAROLD WESTLEY PHILLIPS MD
NPI 1356720098
Neurological Surgery in Palo Alto, CA

Active since May 27, 2015PECOS Enrolled
77.5/100
CMS Quality Rating
725 WELCH RD, PALO ALTO, CA 94304(650) 497-8000 Get Directions Write a Review

NPPES record last updated: April 26, 2024. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Apr 26, 2024, Aug 17, 2023, Apr 15, 2020 (3 updates tracked since 2020).

About Harold Westley Phillips Md NPPES

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

HAROLD WESTLEY PHILLIPS MD (NPI 1356720098) is an individual neurological surgery provider in Palo Alto, California, licensed in California (A150191) and active in the NPI registry since May 2015. He is enrolled in Medicare PECOS and maintains 2 additional practice locations.

NPPES Registry Identity

NPI1356720098
Entity TypeIndividualMale
Primary Taxonomy207T00000X
Provider Legal NameHAROLD WESTLEY PHILLIPSCredential: MD
Location Address725 WELCH RDPalo Alto, CA 94304-1601
Mailing Address725 Welch RdPalo Alto, CA 94304-1601 · (650) 497-8000
Sole ProprietorNo
Enumeration DateMay 27, 2015
Last NPPES UpdateApril 26, 20243 updates tracked since enumeration
NPPES CertifiedApril 26, 2024
✔ NPI 1356720098 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNeurological SurgeryAllopathic & Osteopathic Physicians
Taxonomy Code207T00000X
License✔ Licensed in CA · A150191
Definition
A neurological surgeon provides the operative and non-operative management (i.e., prevention, diagnosis, evaluation, treatment, critical care, and rehabilitation) of disorders of the central, peripheral, and autonomic nervous systems, including their supporting structures and vascular supply; the evaluation and treatment of pathological processes which modify function or activity of the nervous system; and the operative and non-operative management of pain. A neurological surgeon treats patients with disorders of the nervous system; disorders of the brain, meninges, skull, and their blood supply, including the extracranial carotid and vertebral arteries; disorders of the pituitary gland; disorders of the spinal cord, meninges, and vertebral column, including those which may require treatment by spinal fusion or instrumentation; and disorders of the cranial and spinal nerves throughout their distribution.
725 WELCH RD, Palo Alto, CA 94304

Secondary Practice Locations 2

Location 1300 Stein Plaza Driveway Suite 420Los Angeles, CA 90095-0001 · Phone (310) 825-5111
Location 2550 1st AveNew York, NY 10016-6402 · Phone (212) 263-5506

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Harold Westley Phillips 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.

Medicare Billing Reassignments

3

Medicare enrollment records show Harold Phillips reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Children
725 WELCH RD
Palo Alto, CA 94304
  • Reassigned Medicare billing, California enrollment
  • 3,617 clinicians in this Medicare group
General Acute Care Hospital
300 PASTEUR DRIVE
Stanford, CA 94305
  • Reassigned Medicare billing, California enrollment
  • 4,258 clinicians in this Medicare group
Neurological Surgery
425 W FIFTH ST, EAST LIVERPOOL CITY HOSPITAL
East Liverpool, OH 43920
  • Reassigned Medicare billing, Pennsylvania enrollment
  • 7,114 clinicians in this Medicare group

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

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.

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.

77.5/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality68.61
Promoting Interoperability100
Improvement Activities40
Cost56.4

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.

Occupational Therapist (Pediatrics)
725 WELCH RD
PALO ALTO, CA 94304
Nurse Practitioner (Neonatal)
725 WELCH RD
PALO ALTO, CA 94304
Pediatrics
725 WELCH RD
PALO ALTO, CA 94304
Anesthesiology (Pediatric Anesthesiology)
725 WELCH RD
PALO ALTO, CA 94304
Pediatrics (Pediatric Hematology-Oncology)
725 WELCH RD
PALO ALTO, CA 94304
Occupational Therapist
725 WELCH RD
PALO ALTO, CA 94304
Nurse Practitioner
725 WELCH RD
PALO ALTO, CA 94304
Hospitalist
725 WELCH RD
PALO ALTO, CA 94304

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 Harold Phillips's NPI number?

The NPI number for Harold Phillips is 1356720098. It was assigned to this individual provider in the NPPES registry on May 27, 2015.

Where is Harold Phillips located?

Harold Phillips practices at 725 Welch Rd, Palo Alto, CA 94304. The listed phone number is (650) 497-8000.

What is Harold Phillips's specialty?

The primary specialty registered for this NPI is Neurological Surgery with taxonomy code 207T00000X.

Is Harold Phillips enrolled in Medicare?

Yes. Harold Phillips is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Harold Phillips's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Harold Phillips reassigns Medicare benefits to 3 organizations: Lpch Medical Group Div Of Lucile (Palo Alto, CA), Stanford Health Care (Stanford, CA) and University Of Pittsburgh Physicians (East Liverpool, OH). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Harold Phillips's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Harold Phillips was last updated on April 26, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.