NPPES file of Aug 9, 2026

Patrick C. Hsieh, MD

Neurological Surgery Physician · Los Angeles, CA

Patrick C. Hsieh, MD is a neurological surgery physician with a practice address in Los Angeles, California, and NPI 1942405956, issued on Jun 19, 2007. Check the license (California A104473, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1942405956
Name
Patrick C. Hsieh
Credential
MD
Primary taxonomy
Neurological Surgery Physician 207T00000X
License number
A104473 CA
Self-reported in NPPES; status is on the state search
Practice location
1520 San Pablo St, Los Angeles, CA 90033
Phone
(323) 442-5720
Enumerated
Jun 19, 2007
Record last updated
May 17, 2021 (not updated in 5 years: call before relying on the address or phone)
Fax
(323) 442-7543
Medicare enrollment
Enrolled (PECOS I20081020000115); accepts Medicare assignment
Medical or professional school
University Of Southern California Keck School Of Medicine, 2001
Telehealth
Offers telehealth (CMS)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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Also registered at 1520 San Pablo St

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Frank Acosta, PHDPsychologist1750313490
  2. Gbemisola Adenuga, M.D.Nephrology Physician1952464661
  3. Aimee Aguillon, OTR/L, CHTOccupational Therapist1972677318
  4. Haig Aharonian, M.D.Internal Medicine Physician1205107653
  5. Jamshid Ahmadi, M.D.Neuroradiology Physician1942252028
  6. Mohammad Akmal, M.D.Nephrology Physician1356378087

Verify Patrick C. Hsieh in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A104473
    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the California license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Industry payments in 2024: $56,410.43

12 payments; by number, the most common kind was royalty or license; the largest payer was Medtronic, Inc. The 5,377 providers of this specialty with any payment received $14,925.58 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Patrick Hsieh$56,410
  2. Specialty average$14,926

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Bills Medicare through one group practice

  1. Usc Care Medical Group IncArcadia, CA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Patrick C. Hsieh among 929 neurological surgery physician records in California

Patrick C. Hsieh, MD is one of 929 neurological surgery physician records with a practice address in California. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 38% of them.

  • NPI issued2007 · 38% of these records are older, 48% newer
  • In a Medicare fileYes · 77% of these records are
  • In the CMS Doctors and Clinicians fileYes · 66% of these records are
  • Graduated2001 · median 2005 among the 612 with a school on file
  • Record last updated2021 · 55% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207T00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Neurological Surgery Physician providers in California

There are 929 neurological surgery physician records in California.

The 8 neurological surgery physician records with the nearest ZIP codes

  1. Arun Amar, MDLos Angeles, CA 900331447348032
  2. Michael Apuzzo, M.D.Los Angeles, CA 900331720027501
  3. Frank Attenello, M.D., M.S.Los Angeles, CA 900331386818227
  4. Thomas Chen, M.D., PHDLos Angeles, CA 900331225071509
  5. Steven Giannotta, M.D.Los Angeles, CA 900331114978871
  6. John Gruen, M.D.Los Angeles, CA 900331194769570
  7. Charles Liu, M.D., PHDLos Angeles, CA 900331568406080
  8. John Liu, MDLos Angeles, CA 900331235161449

Common questions

What is Patrick C. Hsieh, MD's NPI number?

Patrick C. Hsieh, MD's National Provider Identifier (NPI) is 1942405956, issued on Jun 19, 2007. An NPI identifies a provider in billing; it is not a license.

Where is Patrick C. Hsieh, MD located?

The NPPES record lists a practice address at 1520 San Pablo St, Los Angeles, CA, 90033. Phone: (323) 442-5720. Providers update this record themselves, so call before visiting.

How can I verify Patrick C. Hsieh, MD's license?

NPPES lists California license number A104473, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

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.