Eric Melvin Chwa, M.D
Internal Medicine Physician · Arcadia, CA
Eric Melvin Chwa, M.D is an internal medicine physician with a practice address in Arcadia, California, and NPI 1962433607, issued on Jul 5, 2006. Check the license (California A49506, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Eric Melvin Chwa
- Credential
- M.D
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A49506 CA
Self-reported in NPPES; status is on the state search - Practice location
- 632 W Duarte RD Ste 180, Arcadia, CA 91007
- Phone
- (626) 821-6411
- Enumerated
- Jul 5, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (626) 821-6414
- Medicaid ID
- 00A495061 CA
- Medicare enrollment
- Enrolled (PECOS I20100915000920); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 632 W Duarte RD Ste 180
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Joanna Chwa, FNPFamily Nurse Practitioner1831976372
- Nilar Chwa, M.DInternal Medicine Physician1316978067
- Aung Kyaw Zaw, MDInternal Medicine Physician1306108634
Verify Eric Melvin Chwa in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A49506Check 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% more Medicare Part D claims than the average internal medicine physician in 2024
5,739 Medicare Part D claims for 423 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 6% of claims. 67 claims were for opioids.
Most prescribed
- Atorvastatin Calcium595 claims
- Amlodipine Besylate423 claims
- Metformin Hcl328 claims
- Losartan Potassium285 claims
- Levothyroxine Sodium260 claims
- Lisinopril200 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.
Industry payments in 2024: $612.98
5 payments; by number, the most common kind was food and beverage; the largest payer was Gilead Sciences, Inc. The 50,334 providers of this specialty with any payment received $1,303.06 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.
Eric Melvin Chwa among 17,696 internal medicine physician records in California
Eric Melvin Chwa, 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 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 56% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1981 · median 2004 among the 11,065 with a school on file
- Record last updated2007 · 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).
74 internal medicine physician records list a practice address in Arcadia
They are 74 of the 2,033 NPPES records with a practice address in Arcadia, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Arcadia → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Vincent Antosz, MDArcadia, CA 910071831150135
- Phillip Cabasso, M.D.Arcadia, CA 910071609812841
- Pai-Hsiang Chen, D.OArcadia, CA 910071063405892
- Kuancheng Chen, MDArcadia, CA 910071235125790
- Nilar Chwa, M.DArcadia, CA 910071316978067
- Mary Jones, M.D.Arcadia, CA 910071902873805
- Fauzia Khan, MDArcadia, CA 910071326039678
- John Lee, MDArcadia, CA 910071609816917
Common questions
What is Eric Melvin Chwa, M.D's NPI number?
Eric Melvin Chwa, M.D's National Provider Identifier (NPI) is 1962433607, issued on Jul 5, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Eric Melvin Chwa, M.D located?
The NPPES record lists a practice address at 632 W Duarte RD Ste 180, Arcadia, CA, 91007. Phone: (626) 821-6411. Providers update this record themselves, so call before visiting.
How can I verify Eric Melvin Chwa, M.D's license?
NPPES lists California license number A49506, 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 Eric Melvin Chwa, M.D prescribe under Medicare Part D?
In 2024, Eric Melvin Chwa, M.D had 5,739 Medicare Part D claims for 423 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.