Ellen Hucal O'Halloran, P.A.-C
Physician Assistant · Santa Cruz, CA
Ellen Hucal O'Halloran, P.A.-C is a physician assistant with a practice address in Santa Cruz, California, and NPI 1346618071, issued on Sep 11, 2015. Check the license (California PA52551, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Ellen Hucal O'Halloran
- Credential
- P.A.-C
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- PA52551 CA
Self-reported in NPPES; status is on the state search - Practice location
- 620B Sumner St, Santa Cruz, CA 95062
- Phone
- (408) 464-9619
- Enumerated
- Sep 11, 2015
- Record last updated
- Sep 11, 2015 (not updated in 11 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 14,451 in California → Look up another NPI →
Verify Ellen Hucal O'Halloran in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license PA52551Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
95% fewer Medicare Part D claims than the average physician assistant in 2024
39 Medicare Part D claims for 32 beneficiaries, against an average of 830 among the 101,058 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 94.6 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Ellen Hucal O'Halloran among 14,451 physician assistant records in California
Ellen Hucal O'Halloran, P.A.-C is one of 14,451 physician assistant records with a practice address in California. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2015, is newer than 41% of them.
- NPI issued2015 · 41% of these records are older, 56% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileNo · 50% of these records are
- Record last updated2015 · 40% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363A00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
94 physician assistant records list a practice address in Santa Cruz
They are 94 of the 5,138 NPPES records with a practice address in Santa Cruz, and 14,451 physician assistant records in California.
All 14,451 in California → Every provider in Santa Cruz → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Monica Ball, PA-CSanta Cruz, CA 950621205977790
- Christina Brady, PASanta Cruz, CA 950621528246907
- Steven BregmanSanta Cruz, CA 950621396716783
- Andrew Colen, PASanta Cruz, CA 950621568432482
- Scott Failor, PASanta Cruz, CA 950621083787022
- Maria Fuchs, PASanta Cruz, CA 950621134465933
- Nicole Graham, PASanta Cruz, CA 950621538130638
- Diane Hull, P.A.Santa Cruz, CA 950621184810988
Common questions
What is Ellen Hucal O'Halloran, P.A.-C's NPI number?
Ellen Hucal O'Halloran, P.A.-C's National Provider Identifier (NPI) is 1346618071, issued on Sep 11, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Ellen Hucal O'Halloran, P.A.-C located?
The NPPES record lists a practice address at 620B Sumner St, Santa Cruz, CA, 95062. Phone: (408) 464-9619. Providers update this record themselves, so call before visiting.
How can I verify Ellen Hucal O'Halloran, P.A.-C's license?
NPPES lists California license number PA52551, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Ellen Hucal O'Halloran, P.A.-C prescribe under Medicare Part D?
In 2024, Ellen Hucal O'Halloran, P.A.-C had 39 Medicare Part D claims for 32 beneficiaries; the average among physician assistant prescribers was 830. Part D covers Medicare prescriptions only.
What is Ellen Hucal O'Halloran, P.A.-C's MIPS final score?
The 2023 MIPS final score is 94.6 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.