Joanna Ai Wan Tan, M.D.
Internal Medicine Physician · Long Beach, CA
Joanna Ai Wan Tan, M.D. is an internal medicine physician with a practice address in Long Beach, California, and NPI 1053637959, issued on Apr 16, 2010. Check the license (California A109279, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Joanna Ai Wan Tan
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A109279 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2801 Atlantic Ave, Long Beach, CA 90806
- Phone
- (714) 436-4444
- Enumerated
- Apr 16, 2010
- Record last updated
- Jan 12, 2026
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 2801 Atlantic Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Naima Abdirahman, NPAcute Care Nurse Practitioner1215640560
- William AbeClinical Social Worker1316550148
- Holly Adams, MSW, LCSW, OSW-CClinical Social Worker1639591134
- Jennifer Agnew, PHARM. DPharmacist1285435685
- Mannat Agnish, MD, MPHStudent in an Organized Health Care Education/Training Program1881321883
- Mary Elaine Aguilar-Choomngern, NPMedical-Surgical Registered Nurse1033765474
Verify Joanna Ai Wan Tan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A109279Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
81% fewer Medicare Part D claims than the average internal medicine physician in 2024
610 Medicare Part D claims for 177 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims. 36 claims were for opioids.
Most prescribed
- Atorvastatin Calcium31 claims
- Metoprolol Succinate29 claims
- Furosemide25 claims
- Pantoprazole Sodium18 claims
- Tamsulosin Hcl18 claims
- Losartan Potassium17 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.
Joanna Ai Wan Tan among 17,696 internal medicine physician records in California
Joanna Ai Wan Tan, M.D. is one of 17,696 internal medicine physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2010, is newer than 63% of them.
- NPI issued2010 · 63% of these records are older, 34% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- Record last updated2026 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
221 internal medicine physician records list a practice address in Long Beach
They are 221 of the 13,650 NPPES records with a practice address in Long Beach, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Long Beach → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- John Adams, D.O.Long Beach, CA 908061801852900
- Mark Asbill, M.D.Long Beach, CA 908061558310896
- Alla Gartsman, M.D.Long Beach, CA 908061457317133
- Sabrina Harper, MDLong Beach, CA 908061023081924
- Richard Im, MDLong Beach, CA 908061972586840
- Tina Kitajima, M.D.Long Beach, CA 908061033164892
- Angela Lamotte, M.D.Long Beach, CA 908061538166764
- Raymond Lee, M.D.Long Beach, CA 908061295790277
Common questions
What is Joanna Ai Wan Tan, M.D.'s NPI number?
Joanna Ai Wan Tan, M.D.'s National Provider Identifier (NPI) is 1053637959, issued on Apr 16, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Joanna Ai Wan Tan, M.D. located?
The NPPES record lists a practice address at 2801 Atlantic Ave, Long Beach, CA, 90806. Phone: (714) 436-4444. Providers update this record themselves, so call before visiting.
How can I verify Joanna Ai Wan Tan, M.D.'s license?
NPPES lists California license number A109279, 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 Joanna Ai Wan Tan, M.D. prescribe under Medicare Part D?
In 2024, Joanna Ai Wan Tan, M.D. had 610 Medicare Part D claims for 177 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
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.