Lisa Hertz, MD
Gastroenterology Physician · Los Alamitos, CA
Lisa Hertz, MD is a gastroenterology physician with a practice address in Los Alamitos, California, and NPI 1639237720, issued on Dec 4, 2006. Check the license (California G59291, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Lisa Hertz
- Credential
- MD
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- G59291 CA
Self-reported in NPPES; status is on the state search - Practice location
- 4772 Katella Ave, Los Alamitos, CA 90720
- Phone
- (562) 596-5552
- Enumerated
- Dec 4, 2006
- Record last updated
- Aug 13, 2025
- Fax
- (562) 596-5340
- Medicare enrollment
- Enrolled (PECOS I20050502000315); accepts Medicare assignment
- Medical or professional school
- Harvard Medical School, 1984
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 2,140 in California → Look up another NPI →
Also registered at 4772 Katella Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Katherine Beckwith, PA-CPhysician Assistant1710397930
- Carrie HuangAcupuncturist1710285002
- Stacey MartinelliOccupational Therapist1124440383
- Candia Seibly, OTR/LSpecialist1932349164
Verify Lisa Hertz in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G59291Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3% more Medicare Part D claims than the average gastroenterology physician in 2024
834 Medicare Part D claims for 233 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 16% of claims.
Most prescribed
- Pantoprazole Sodium215 claims
- Famotidine145 claims
- Sod Sulf-Potass Sulf-Mag Sulf59 claims
- Omeprazole44 claims
- Mesalamine43 claims
- Creon26 claims
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.
No measured MIPS final score for 2023
CMS assigned the neutral MIPS final score of 75 without scoring Quality, Cost, Promoting Interoperability or Improvement Activities. It is an administrative threshold, so PlainDoctor does not compare it with measured clinicians.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $1,874.91
84 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 13,350 providers of this specialty with any payment received $5,015.95 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 2 group practices
- Comprehensive GI Care A Professional Medical Group IncLos Alamitos, CA
- Genesis Healthcare Partners PCLa Jolla, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Lisa Hertz among 2,140 gastroenterology physician records in California
Lisa Hertz, MD is one of 2,140 gastroenterology physician records with a practice address in California. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 7% of them.
- NPI issued2006 · 7% of these records are older, 48% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated1984 · median 2002 among the 1,538 with a school on file
- Record last updated2025 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in California
There are 2,140 gastroenterology physician records in California.
All 2,140 in California → Every provider in Los Alamitos → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Joe Chen, M.D.Los Alamitos, CA 907201700817350
- Michael Fleischman, M.D.Los Alamitos, CA 907201801073994
- Thai-Van Nguyen, M.D.Los Alamitos, CA 907201427082890
- Eugene Pantangco, M.D.Los Alamitos, CA 907201205916780
- Daniel Rodiles, M.D.Los Alamitos, CA 907201497789960
- Joseph Tan, M.D.Paramount, CA 907231629149901
- Conrad Cox, M.D.Lakewood, CA 907121851338941
- Trien Bui, MDHarbor City, CA 907101881742617
Common questions
What is Lisa Hertz, MD's NPI number?
Lisa Hertz, MD's National Provider Identifier (NPI) is 1639237720, issued on Dec 4, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Lisa Hertz, MD located?
The NPPES record lists a practice address at 4772 Katella Ave, Los Alamitos, CA, 90720. Phone: (562) 596-5552. Providers update this record themselves, so call before visiting.
How can I verify Lisa Hertz, MD's license?
NPPES lists California license number G59291, 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.
How much does Lisa Hertz, MD prescribe under Medicare Part D?
In 2024, Lisa Hertz, MD had 834 Medicare Part D claims for 233 beneficiaries; the average among gastroenterology physician prescribers was 811. Part D covers Medicare prescriptions only.
What is Lisa Hertz, MD's MIPS final score?
CMS assigned the neutral MIPS final score of 75 for 2023 without scoring any category, so it is not a measured result.
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.