John Chia, MD
NPI 1801876412 · Infectious Disease Physician · Torrance, CA
Enrolled with Medicare as Practitioner - Infectious Disease · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Chia, MD is a Infectious Disease Physician provider in Torrance, CA (NPI 1801876412).
Provider details
- NPI number
- 1801876412
- Entity type
- Individual
- Primary specialty
- Infectious Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- G43168 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
553 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 227 | $190 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 187 | $138 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 44 | $8 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 40 | $81 |
| Prolonged Office Or Other Outpatient Evaluation and Management Service(s) Beyond the Maximum Required Time of the Primary Procedure Which Has Been Selected Using Total Time on the Date of the Primary Service; Each Additional 15 Minutes By the Physician OrG2212 | 36 | $34 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 54 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Fluvoxamine Maleate | 113 | 34 |
| Acyclovir | 109 | 31 |
| Nirmatrelvir/Ritonavirbrand: Paxlovid | 99 | 75 |
| Aripiprazole | 55 | 12 |
| Lamivudine | 54 | 13 |
| Valacyclovir Hclbrand: Valacyclovir | 51 | 20 |
| Gabapentin | 46 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$329 across 8 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-01-19
- Last updated
- 2018-04-11
Frequently asked questions
- What is John Chia's NPI number?
- John Chia's National Provider Identifier (NPI) is 1801876412, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Chia's specialty?
- John Chia is listed in the NPPES registry with a primary specialty of Infectious Disease Physician (Allopathic & Osteopathic Physicians).
- Where is John Chia located?
- John Chia's practice location on file with NPPES is 23430 Hawthorne Blvd Ste 200, Torrance, CA 90505-4730.
- What is John Chia's phone number?
- The practice phone number listed in the NPPES registry for John Chia is (310) 784-5880.
- Does John Chia accept Medicare?
- John Chia is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Chia's NPI active?
- Yes — John Chia's NPI (1801876412) is active in the NPPES registry as of the last update on 2018-04-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.