Haley Morgan Roberson Issichopoulos, MSM, PA-C
Medical Physician Assistant · Portola Valley, CA
Haley Morgan Roberson Issichopoulos, MSM, PA-C is a medical physician assistant with a practice address in Portola Valley, California, and NPI 1699288027, issued on Nov 7, 2017. Check the license (California 54940, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Haley Morgan Roberson Issichopoulos
- Credential
- MSM, PA-C
- Primary taxonomy
- Medical Physician Assistant 363AM0700X
- License numbers
- 54940 CA
54950 CA
Self-reported in NPPES; status is on the state search - Practice location
- 844 Portola RD, Portola Valley, CA 94028
- Phone
- (650) 494-1000
- Enumerated
- Nov 7, 2017
- Record last updated
- May 10, 2021 (not updated in 5 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest medical physician assistant records → All 3,376 in California → Look up another NPI →
Verify Haley Morgan Roberson Issichopoulos in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 54940Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average medical physician assistant in 2024
11 Medicare Part D claims, against an average of 1,148 among the 23,801 providers of this specialty who prescribed in Part D.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Haley Morgan Roberson Issichopoulos among 3,376 medical physician assistant records in California
Haley Morgan Roberson Issichopoulos, MSM, PA-C is one of 3,376 medical physician assistant records with a practice address in California. 69% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2017, is newer than 69% of them.
- NPI issued2017 · 69% of these records are older, 29% newer
- In a Medicare fileYes · 69% of these records are
- In the CMS Doctors and Clinicians fileNo · 40% of these records are
- Record last updated2021 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363AM0700X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
1 medical physician assistant record lists a practice address in Portola Valley
They are 1 of the 84 NPPES records with a practice address in Portola Valley, and 3,376 medical physician assistant records in California.
All 3,376 in California → Every provider in Portola Valley → Medical Physician Assistant nationwide →
The 8 medical physician assistant records with the nearest ZIP codes
- Nancy Hsieh, PA-CMenlo Park, CA 940251750665444
- Wynona Caliboso, PA-CMountain View, CA 940401184318958
- Mark Caplin, PA-CMountain View, CA 940401174792865
- Lisa Cheung, PAMountain View, CA 940401659093987
- Daniel Hwang, PA-CMountain View, CA 940401649992371
- Husna Khan, PAMountain View, CA 940401205674470
- Brian NewtonMountain View, CA 940401730814609
- Benjamin Tausheck, PA-CMountain View, CA 940401285203422
Common questions
What is Haley Morgan Roberson Issichopoulos, MSM, PA-C's NPI number?
Haley Morgan Roberson Issichopoulos, MSM, PA-C's National Provider Identifier (NPI) is 1699288027, issued on Nov 7, 2017. An NPI identifies a provider in billing; it is not a license.
Where is Haley Morgan Roberson Issichopoulos, MSM, PA-C located?
The NPPES record lists a practice address at 844 Portola RD, Portola Valley, CA, 94028. Phone: (650) 494-1000. Providers update this record themselves, so call before visiting.
How can I verify Haley Morgan Roberson Issichopoulos, MSM, PA-C's license?
NPPES lists California license number 54940, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Haley Morgan Roberson Issichopoulos, MSM, PA-C prescribe under Medicare Part D?
In 2024, Haley Morgan Roberson Issichopoulos, MSM, PA-C had 11 Medicare Part D claims; the average among medical physician assistant prescribers was 1,148. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.