John Sy, M.D.
Nephrology Physician · Long Beach, CA
John Sy, M.D. is a nephrology physician with a practice address in Long Beach, California, and NPI 1639435738, issued on Apr 3, 2012. Check the license (California A128347, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- John Sy
- Credential
- M.D.
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License number
- A128347 CA
Self-reported in NPPES; status is on the state search - Practice location
- 5901 E 7TH St, Long Beach, CA 90822
- Phone
- (562) 826-8000
- Enumerated
- Apr 3, 2012
- Record last updated
- Jun 21, 2018 (not updated in 8 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20170706002979); accepts Medicare assignment
- Medical or professional school
- University Of Texas Southwestern Medical School At Dallas, 2012
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest nephrology physician records → All 1,468 in California → Look up another NPI →
Also registered at 5901 E 7TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Nneoma Achikam, LCSW, BCDClinical Social Worker1114182953
- Sameera Ahmad, ODOptometrist1164117891
- Sama Alabbas, PHARMDPharmacist1366165193
- Lawrence Albers, MDPsychiatry Physician1871697300
- Abby AlexanderOptometrist1871113068
- Tamara Alexander, PT, DPTPhysical Therapist1922116714
Verify John Sy in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A128347Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
37% fewer Medicare Part D claims than the average nephrology physician in 2024
925 Medicare Part D claims for 127 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D.
Most prescribed
- Losartan Potassium79 claims
- Lokelma52 claims
- Velphoro52 claims
- Amlodipine Besylate47 claims
- Carvedilol38 claims
- Furosemide38 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.
The MIPS final score for 2023 (Medicare payment program): 100 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $306.44
11 payments; by number, the most common kind was food and beverage; the largest payer was Novartis Pharmaceuticals Corporation. The 8,230 providers of this specialty with any payment received $3,091.37 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.
Bills Medicare through one group practice
- UC RegentsOrange, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Sy among 1,468 nephrology physician records in California
John Sy, M.D. is one of 1,468 nephrology physician records with a practice address in California. 88% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2012, is newer than 80% of them.
- NPI issued2012 · 80% of these records are older, 17% newer
- In a Medicare fileYes · 88% of these records are
- In the CMS Doctors and Clinicians fileYes · 77% of these records are
- Graduated2012 · median 2001 among the 1,128 with a school on file
- Record last updated2018 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RN0300X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Nephrology Physician providers in California
There are 1,468 nephrology physician records in California.
All 1,468 in California → Every provider in Long Beach → Nephrology Physician nationwide →
The 8 nephrology physician records with the nearest ZIP codes
- Joline Chen, M.D.Long Beach, CA 908221871511931
- Gaurang Shah, M.D.Long Beach, CA 908221619989571
- Chonlada Chivangkul, M.D.Long Beach, CA 908061184063570
- Alan Erlbaum, M.D.Long Beach, CA 908061255337028
- John Hsieh, M.D.Long Beach, CA 908061659376606
- Essam Maasarani, M.D.Long Beach, CA 908061366448136
- Arvind Mehta, MDLong Beach, CA 908061518985613
- Alice Park, M.D.Long Beach, CA 908061649336298
Common questions
What is John Sy, M.D.'s NPI number?
John Sy, M.D.'s National Provider Identifier (NPI) is 1639435738, issued on Apr 3, 2012. An NPI identifies a provider in billing; it is not a license.
Where is John Sy, M.D. located?
The NPPES record lists a practice address at 5901 E 7TH St, Long Beach, CA, 90822. Phone: (562) 826-8000. Providers update this record themselves, so call before visiting.
How can I verify John Sy, M.D.'s license?
NPPES lists California license number A128347, 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 John Sy, M.D. prescribe under Medicare Part D?
In 2024, John Sy, M.D. had 925 Medicare Part D claims for 127 beneficiaries; the average among nephrology physician prescribers was 1,465. Part D covers Medicare prescriptions only.
What is John Sy, M.D.'s MIPS final score?
The 2023 MIPS final score is 100 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.