John Cho, M.D.
Internal Medicine Physician · Sylmar, CA
John Cho, M.D. is an internal medicine physician with a practice address in Sylmar, California, and NPI 1063541654, issued on Mar 2, 2007. Check the license (California A89311, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- John Cho
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A89311 CA
Self-reported in NPPES; status is on the state search - Practice location
- 14445 Olive View Drive, North Annex, Sylmar, CA 91342
- Phone
- (818) 364-3632
- Enumerated
- Mar 2, 2007
- Record last updated
- Oct 13, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20091013000247); accepts Medicare assignment
- Medical or professional school
- University Of California, San Diego School Of Medicine, 2003
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 14445 Olive View Drive, North Annex
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify John Cho in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A89311Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
65% fewer Medicare Part D claims than the average internal medicine physician in 2024
1,117 Medicare Part D claims for 207 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 41% of claims.
Most prescribed
- Breyna216 claims
- Spiriva Respimat169 claims
- Albuterol Sulfate Hfa144 claims
- Montelukast Sodium137 claims
- Prednisone70 claims
- Alvesco47 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
- Southern California Permanente Medical GroupPanorama City, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Cho among 17,696 internal medicine physician records in California
John Cho, 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 2007, is newer than 44% of them.
- NPI issued2007 · 44% of these records are older, 44% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2003 · median 2004 among the 11,065 with a school on file
- Record last updated2021 · 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).
102 internal medicine physician records list a practice address in Sylmar
They are 102 of the 1,454 NPPES records with a practice address in Sylmar, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Sylmar → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Fredric Adler, MDSylmar, CA 913421356376735
- Janet Au, MDSylmar, CA 913421932126570
- Peter Balingit, MDSylmar, CA 913421114952264
- Andrea Cooperman, MDSylmar, CA 913421326134560
- Basem Fanous, MDSylmar, CA 913421619072600
- Emil Heinze, MDSylmar, CA 913421720175052
- Miles Jakl, M.D.Sylmar, CA 913421992738306
- Luis Lovato, M.D.Sylmar, CA 913421407945678
Common questions
What is John Cho, M.D.'s NPI number?
John Cho, M.D.'s National Provider Identifier (NPI) is 1063541654, issued on Mar 2, 2007. An NPI identifies a provider in billing; it is not a license.
Where is John Cho, M.D. located?
The NPPES record lists a practice address at 14445 Olive View Drive, North Annex, Sylmar, CA, 91342. Phone: (818) 364-3632. Providers update this record themselves, so call before visiting.
How can I verify John Cho, M.D.'s license?
NPPES lists California license number A89311, 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 Cho, M.D. prescribe under Medicare Part D?
In 2024, John Cho, M.D. had 1,117 Medicare Part D claims for 207 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.