Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Lisa Hertz, MD

Individual provider Gastroenterology Physician · NPI 1639237720

Lisa Hertz, MD is a Gastroenterology in Los Alamitos, California. Graduated from Harvard Medical School in 1984, 42 years ago. Practices with Comprehensive Gi Care a Professional Medical Group Inc, a 3-clinician group, accepts Medicare assignment and offers telehealth. Licensed in California.

Years since qualifying
42
Trained at
Harvard Medical School
Licensed in
CA
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

4772 Katella Ave #200
Los Alamitos, CA 90720-2600
Phone: (562) 596-5552
Fax: (562) 596-5340
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence G59291 (CA)

Record details

NPI number1639237720
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedDecember 4, 2006
Last updated in NPPESAugust 13, 2025
Certification dateAugust 13, 2025
Mailing address4772 Katella Ave, 200, Los Alamitos, CA 90720-2600

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyGASTROENTEROLOGY
Medical schoolHARVARD MEDICAL SCHOOL
Graduated 1984 (42 years in practice)
Group practice Comprehensive Gi Care A Professional Medical Group Inc — 3 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations4 on file with Medicare

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