Physician Profile
Unclaimed ProfileAbout LEE
Ann Joo Lee, M.D. is a healthcare provider in Downey, CA specializing in gastroenterology. According to Medicare claims data, Ann cared for 75 Medicare patients across 75 services.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Areas of Expertise
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (562) 869-4497
- Email not available
Practice Locations
10441 LAKEWOOD BLVD STE B
Downey, CA 90241
Procedures Most Often Billed to Medicare
75 services · 75 patients · 4 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | Procedure | 43239 |
20 |
| Biopsy of large bowel using a flexible endoscope | Procedure | 45380 |
11 |
| Initial hospital care with straightforward or low level of medical decision making, per day, if using time, at least 40 minutes | Office visit | 99221 |
28 |
| Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | Office visit | 99222 |
16 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Related specialists at this location 8
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other gastroenterology specialists in Downey 6
Same specialty, same city.
More connections — 24 related providers in 3 groups
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 2008 at Other 8
Providers who graduated from the same medical school in the same year.
Also performs Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope 8
Providers in CA who bill this service to Medicare most often.
Common questions
What kind of doctor is Dr. Lee?
Dr. Lee is a gastroenterology in Downey, CA. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “GASTROENTEROLOGY”.
NPI registry
What is Dr. Lee's address?
Dr. Lee is listed at 10441 LAKEWOOD BLVD STE B, Downey, CA 90241. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Dr. Lee?
The number on file is (562) 869-4497. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Lee's NPI number?
Dr. Lee's National Provider Identifier is 1396979126. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Dr. Lee train?
Dr. Lee attended Other, graduating in 2008. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Lee been practicing?
Dr. Lee has 18 years experience. Calculated from a graduation year of 2008, reported in the CMS National Downloadable File.
CMS public data
What procedures does Dr. Lee perform?
According to Medicare billing data, Dr. Lee performs procedures including biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope and biopsy of large bowel using a flexible endoscope, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Lee confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Lee. If this is you, claiming it is free.
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Claim this profileProvider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.