NPPES file of Aug 9, 2026

Jonathan Lyu, DO

Geriatric Medicine (Internal Medicine) Physician · Sylmar, CA

Jonathan Lyu, DO is a geriatric medicine (internal medicine) physician with a practice address in Sylmar, California, and NPI 1447888698, issued on Mar 31, 2020. Check the license (California 21026, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1447888698
Name
Jonathan Lyu
Credential
DO
Primary taxonomy
Geriatric Medicine (Internal Medicine) Physician 207RG0300X
License number
21026 CA
Self-reported in NPPES; status is on the state search
Practice location
14445 Olive View Dr, Sylmar, CA 91342
Phone
(747) 210-3205
Enumerated
Mar 31, 2020
Record last updated
Mar 6, 2025
Fax
(747) 210-4573
Medicare enrollment
Enrolled (PECOS I20241031004102); accepts Medicare assignment
Medical or professional school
Arizona College Of Osteopathic Medicine Mid Western University, 2020
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest geriatric medicine (internal medicine) physician records → All 532 in California → Look up another NPI →

Also registered at 14445 Olive View Dr

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Nasser Abdo, MDInternal Medicine Physician1306911649
  2. Gezman Abdullahi, M.D.Internal Medicine Physician1225394380
  3. Moyosore Abere, NPNurse Practitioner1225667314
  4. Ammini Abraham, MDAnesthesiology Physician1467531541
  5. Margarita Acosta, RN, AGACNPAcute Care Nurse Practitioner1609202415
  6. Fredric Adler, MDInternal Medicine Physician1356376735

Verify Jonathan Lyu in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license 21026    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the California license search

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90% fewer Medicare Part D claims than the average geriatric medicine (internal medicine) physician in 2024

428 Medicare Part D claims for 159 beneficiaries, against an average of 4,246 among the 3,116 providers of this specialty who prescribed in Part D.

  1. Jonathan Lyu428
  2. Specialty average4,246

Most prescribed

  1. Memantine Hcl99 claims
  2. Donepezil Hcl30 claims
  3. Sertraline Hcl23 claims
  4. Amlodipine Besylate22 claims
  5. Trazodone Hcl15 claims
  6. Lactulose14 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.

Bills Medicare through one group practice

  1. Southern California Permanente Medical GroupBellflower, CA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Jonathan Lyu among 532 geriatric medicine (internal medicine) physician records in California

Jonathan Lyu, DO is one of 532 geriatric medicine (internal medicine) physician records with a practice address in California. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2020, is newer than 93% of them.

  • NPI issued2020 · 93% of these records are older, 5% newer
  • In a Medicare fileYes · 77% of these records are
  • In the CMS Doctors and Clinicians fileYes · 51% of these records are
  • Graduated2020 · median 1999 among the 271 with a school on file
  • Record last updated2025 · 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 207RG0300X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Geriatric Medicine (Internal Medicine) Physician providers in California

There are 532 geriatric medicine (internal medicine) physician records in California.

All 532 in California → Every provider in Sylmar → Geriatric Medicine (Internal Medicine) Physician nationwide →

The 8 geriatric medicine (internal medicine) physician records with the nearest ZIP codes

  1. Cathy Alessi, M.D.North Hills, CA 913431134224983
  2. Constance Fung, MDNorth Hills, CA 913431720007792
  3. Samuel Murray, M.D.Sepulveda, CA 913431427168327
  4. Diane SuzukiNorth Hills, CA 913431437174463
  5. Nancy Weintraub, M.D.Sepulveda, CA 913431144322462
  6. Hayka Hovsepyan, MDMission Hills, CA 913451013338706
  7. Nallini Gnanadesigan, M.D.Reseda, CA 913351467480020
  8. Rick Smith, M.D.Reseda, CA 913351932130861

Common questions

What is Jonathan Lyu, DO's NPI number?

Jonathan Lyu, DO's National Provider Identifier (NPI) is 1447888698, issued on Mar 31, 2020. An NPI identifies a provider in billing; it is not a license.

Where is Jonathan Lyu, DO located?

The NPPES record lists a practice address at 14445 Olive View Dr, Sylmar, CA, 91342. Phone: (747) 210-3205. Providers update this record themselves, so call before visiting.

How can I verify Jonathan Lyu, DO's license?

NPPES lists California license number 21026, 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 Jonathan Lyu, DO prescribe under Medicare Part D?

In 2024, Jonathan Lyu, DO had 428 Medicare Part D claims for 159 beneficiaries; the average among geriatric medicine (internal medicine) physician prescribers was 4,246. 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.