Simon Ka Chun So, M.D.
Internal Medicine Physician · Irvine, CA
Simon Ka Chun So, M.D. is an internal medicine physician with a practice address in Irvine, California, and NPI 1336646132, issued on Apr 9, 2018. Check the license (California A166329, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Simon Ka Chun So
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A166329 CA
Self-reported in NPPES; status is on the state search - Practice location
- 4330 Barranca Pkwy Ste 245, Irvine, CA 92604
- Phone
- (949) 273-2888
- Enumerated
- Apr 9, 2018
- Record last updated
- Mar 18, 2022
- Fax
- (949) 273-2801
- Medicare enrollment
- Enrolled (PECOS I20211204000094); accepts Medicare assignment
- Medical or professional school
- Univ Of Central Florida, College Of Medicine, 2018
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 4330 Barranca Pkwy Ste 245
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Kenny Huang, D.C.Chiropractor1306021811
- Nima Kianfard, DCChiropractor1962900530
- Sabrina LiaoPhysician Assistant1518828292
- Sima Soltani, DPMPodiatrist1528147105
Verify Simon Ka Chun So in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A166329Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
66% fewer Medicare Part D claims than the average internal medicine physician in 2024
1,065 Medicare Part D claims for 127 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 14 claims were for opioids.
Most prescribed
- Atorvastatin Calcium124 claims
- Amlodipine Besylate71 claims
- Losartan Potassium67 claims
- Alendronate Sodium47 claims
- Levothyroxine Sodium42 claims
- Metformin Hcl42 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: $376.88
12 payments; by number, the most common kind was food and beverage; the largest payer was Novo Nordisk Inc. The 50,334 providers of this specialty with any payment received $1,303.06 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.
Simon Ka Chun So among 17,696 internal medicine physician records in California
Simon Ka Chun So, 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 2018, is newer than 84% of them.
- NPI issued2018 · 84% of these records are older, 14% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2018 · median 2004 among the 11,065 with a school on file
- Record last updated2022 · 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).
155 internal medicine physician records list a practice address in Irvine
They are 155 of the 7,778 NPPES records with a practice address in Irvine, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Irvine → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Adeela Ahsan, MDIrvine, CA 926041932103595
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- Chienwei Chen, MDIrvine, CA 926041992795256
- Mahdieh Fallahtafti, D.O.Irvine, CA 926041700802998
- Kalena Hwang, M.D.Irvine, CA 926041225088164
- Keith Lee, MDIrvine, CA 926041699766188
- Grace Lozinski, M.D.Irvine, CA 926041659399582
Common questions
What is Simon Ka Chun So, M.D.'s NPI number?
Simon Ka Chun So, M.D.'s National Provider Identifier (NPI) is 1336646132, issued on Apr 9, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Simon Ka Chun So, M.D. located?
The NPPES record lists a practice address at 4330 Barranca Pkwy Ste 245, Irvine, CA, 92604. Phone: (949) 273-2888. Providers update this record themselves, so call before visiting.
How can I verify Simon Ka Chun So, M.D.'s license?
NPPES lists California license number A166329, 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 Simon Ka Chun So, M.D. prescribe under Medicare Part D?
In 2024, Simon Ka Chun So, M.D. had 1,065 Medicare Part D claims for 127 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.