John Ks Chia, MD
Infectious Disease Physician · Torrance, CA
John Ks Chia, MD is an infectious disease physician with a practice address in Torrance, California, and NPI 1801876412, issued on Jan 19, 2006. Check the license (California G43168, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- John Ks Chia
- Credential
- MD
- Primary taxonomy
- Infectious Disease Physician 207RI0200X
- License number
- G43168 CA
Self-reported in NPPES; status is on the state search - Practice location
- 23430 Hawthorne Blvd Ste 200, Torrance, CA 90505
- Phone
- (310) 784-5880
- Enumerated
- Jan 19, 2006
- Record last updated
- Apr 11, 2018 (not updated in 8 years: call before relying on the address or phone)
- Fax
- (310) 325-3117
- Medicaid ID
- 00G431680 CA
- Medicare enrollment
- Enrolled (PECOS I20111209000372); accepts Medicare assignment
- Medical or professional school
- University Of California, Geffen School Of Medicine, 1979
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest infectious disease physician records → All 1,119 in California → Look up another NPI →
Also registered at 23430 Hawthorne Blvd Ste 200
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Donald Whang, M.D.Infectious Disease Physician1922325521
- Eric Yang, MDInternal Medicine Physician1588749600
- Mona Yazdi, DOInfectious Disease Physician1487186706
Verify John Ks Chia in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G43168Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.5 times the Medicare Part D claims of the average infectious disease physician in 2024
1,725 Medicare Part D claims for 216 beneficiaries, against an average of 689 among the 7,388 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims. 82 claims were for opioids.
Most prescribed
- Fluvoxamine Maleate113 claims
- Acyclovir109 claims
- Paxlovid99 claims
- Aripiprazole55 claims
- Lamivudine54 claims
- Valacyclovir51 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: $328.65
8 payments; by number, the most common kind was food and beverage; the largest payer was Gilead Sciences, Inc. The 3,895 providers of this specialty with any payment received $4,362.19 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
- ID Med A Medical CorporationTorrance, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Ks Chia among 1,119 infectious disease physician records in California
John Ks Chia, MD is one of 1,119 infectious disease 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 4% of them.
- NPI issued2006 · 4% of these records are older, 54% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated1979 · median 2003 among the 735 with a school on file
- Record last updated2018 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RI0200X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Infectious Disease Physician providers in California
There are 1,119 infectious disease physician records in California.
All 1,119 in California → Every provider in Torrance → Infectious Disease Physician nationwide →
The 8 infectious disease physician records with the nearest ZIP codes
- Richard Glimp, MDTorrance, CA 905051740260355
- Nour Khouzam, MDTorrance, CA 905051427309285
- Vladimir Labalo, M.D.Torrance, CA 905051871880716
- Meena Lagnese, M.D.Torrance, CA 905051447465729
- Ruihong Luo, MDTorrance, CA 905051912267121
- Eric Milefchik, MDTorrance, CA 905051851362131
- Michael Nakata, MDTorrance, CA 905051609856210
- Behzad Noorian, MDTorrance, CA 905051467536128
Common questions
What is John Ks Chia, MD's NPI number?
John Ks Chia, MD's National Provider Identifier (NPI) is 1801876412, issued on Jan 19, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John Ks Chia, MD located?
The NPPES record lists a practice address at 23430 Hawthorne Blvd Ste 200, Torrance, CA, 90505. Phone: (310) 784-5880. Providers update this record themselves, so call before visiting.
How can I verify John Ks Chia, MD's license?
NPPES lists California license number G43168, 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 Ks Chia, MD prescribe under Medicare Part D?
In 2024, John Ks Chia, MD had 1,725 Medicare Part D claims for 216 beneficiaries; the average among infectious disease physician prescribers was 689. 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.