Haley Morgan Roberson Issichopoulos, MSM, PA-C

Overview

Entity Type: Individual Healthcare Provider
NPI: 1699288027
Primary Specialty: Physician Assistant — Medical
Practice Location: Portola Valley, California
Sole Proprietor: No

Federal Screening

NPISignal checked this NPI against federal exclusion sources. Results below are based on the NPI number itself — an identifier match, not a name match.

List of Excluded Individuals/Entities (LEIE)

HHS Office of Inspector General

No potential match identified

No potential match was identified in NPISignal's indexed List of Excluded Individuals/Entities (LEIE) records as of 2026-09-10.

Source data: September 10, 2026
Records indexed: 84,001
Screened: Sep 21, 2026, 12:47 AM UTC

This reflects only the records NPISignal currently holds and the identity information supplied. It is not a verification of eligibility, licensure, or compliance. Verify decisions that matter against the authoritative source.

SAM.gov Exclusions

U.S. General Services Administration

Not checked

SAM.gov Exclusions was not checked.

SAM.gov screening is not configured on this deployment. No SAM check has been performed.

Screened: Not checked

This is an NPI-based check only. NPISignal does not publish name-based exclusion matches on a provider profile. A shared or similar name is a lead that requires human review, not an identification, and this page is not the place to make one. Run a name-based screening below to see potential matches with the reasons for each.

This reflects only the records NPISignal currently holds and the identity information supplied. It is not a verification of eligibility, licensure, or compliance. Verify decisions that matter against the authoritative source.

Run a name-based screening

Searches OIG LEIE and SAM.gov by name and reviews every potential match.

Specialties & Taxonomies

Physician Assistant
Medical
Physician Assistants & Advanced Practice Nursing Providers
Primary
Definition to come...
Taxonomy code 363AM0700X
Otolaryngology
Otology & Neurotology
Allopathic & Osteopathic Physicians
An otolaryngologist who treats diseases of the ear and temporal bone, including disorders of hearing and balance. The additional training in otology and neurotology emphasizes the study of embryology, anatomy, physiology, epidemiology, pathophysiology, pathology, genetics, immunology, microbiology and the etiology of diseases of the ear and temporal bone.
Taxonomy code 207YX0901X
Physician Assistant
Surgical
Physician Assistants & Advanced Practice Nursing Providers
Definition to come...
Taxonomy code 363AS0400X

Provider-Reported License Information

Physician Assistant (California): 54940
Otolaryngology (California): 54940
Physician Assistant (California): 54950

License numbers are reported by the provider to NPPES and are not independently verified by NPISignal against any state licensing board. Confirm current license status directly with the issuing state board.

Practice Locations

Practice Location

844 Portola Rd

Portola Valley, California 94028-7207

Phone: (650) 494-1000

Additional Practice Location

1900 University Ave Ste 101

East Palo Alto, California 94303-2213

Phone: (650) 494-1000

Fax: (650) 494-1000

Record Information

Enumeration Date: November 7, 2017
Provider's NPPES Record Last Updated: May 10, 2021
Certification Date: May 10, 2021
NPISignal NPPES Dataset: August 2026

Same specialty and location, currently active.

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