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

Dr. Ann Joo Lee, MD

Individual provider Gastroenterology Physician · NPI 1396979126

Dr. Ann Joo Lee, MD is a Gastroenterology in Downey, California. Qualified in 2008, 18 years ago. Practices with Healthcare Partners Affiliates Medical Group, a 790-clinician group, works from 3 locations and accepts Medicare assignment. Licensed in California and Illinois.

Years since qualifying
18
Licensed in
CA, IL
In the registry since
2009
Specialties on file
2
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

10441 Lakewood Blvd Ste B
Downey, CA 90241-2871
Phone: (562) 869-4497
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (2)

  • 8810 C Avenue, Hesperia, CA 92345 — (714) 788-8218
  • 9831 S Western Ave, Chicago, IL 60643-1740 — (773) 445-3500

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence 036-167184 (IL)
Gastroenterology Physician Taxonomy 207RG0100X · Licence 136160 (CA)

Record details

NPI number1396979126
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 7, 2009
Last updated in NPPESDecember 29, 2025
Certification dateDecember 29, 2025

Medicare enrollment

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

Medicare specialtyGASTROENTEROLOGY
Medical schoolOTHER
Graduated 2008 (18 years in practice)
Group practice Healthcare Partners Affiliates Medical Group — 790 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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