Ann Pediatr Endocrinol Metab
Dr. Simon Ka Chun So, MD
NPI1336646132PAC ID1658761770
- Medicare services, 2024
- 183
- Medicare patients, 2024
- 72
- Part D claims, 2024
- 1,065
- Publications
- 1
- Hospital affiliations
- 1
- Practice address
- 8403 N Fallbrook Ave, West Hills, CA 91304
- Practice phone
- Call (740) 289-3508
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Quest Diagnostics
West Hills, California
Find Dr. So's professional email, personal email and mobile number
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Dr. Simon Ka Chun So is an internist in West Hills, California
Dr. So practices at Quest Diagnostics in West Hills, California.
Dr. So's NPI, 1336646132, was assigned on April 9, 2018. Dr. So graduated from University of Central Florida College of Medicine in 2018. Dr. So's California license number on file is A166329.
NPI and contact details
- NPI
- 1336646132NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1658761770
- NPI enumeration date
- April 9, 2018
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (740) 289-3508
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 34
- Medical school graduation
- 2018
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Simon Ka Chun So practices at Quest Diagnostics in West Hills, California
Dr. So's primary practice is Quest Diagnostics, at 8403 N Fallbrook Ave, West Hills, CA 91304 in Los Angeles County. The practice phone is (740) 289-3508.
- Quest Diagnostics8403 N Fallbrook Ave, West Hills, CA 91304 · Los Angeles CountyPhone(740) 289-3508
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Simon Ka Chun So is affiliated with 3 sites of care
Dr. So's primary practice is Quest Diagnostics in West Hills, California. Dr. So is also affiliated with Hoag Hospital Newport Beach. Dmand AI also links Dr. So to 1 more physician office, named with a free account.
Quest DiagnosticsPrimary
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Simon Ka Chun So's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. So practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Quest Diagnostics | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Simon Ka Chun So is one of 16,751 internists in California
Internal medicine is Dr. So's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. So is board certified in internal medicine by the American Board of Internal Medicine. Dr. So has a license on file in California.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
Clinical focus
Dmand AI lists acute gastroduodenitis, chronic diabetes, chronic hypertension, chronic kidney disease, diabetic emergency, erectile dysfunction, hemorrhoids and high cholesterol among the conditions Dr. So treats.
Internists near Dr. So
Counts of internists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Simon Ka Chun So billed Medicare for 183 services in 2024
CMS data shows 183 Medicare services from Dr. So across 3 procedure codes in 2024, for 72 Medicare patients. Medicare paid $18,276 for them. Every service was in an office.
Medicare services, 2024183
Medicare patients72
Paid by Medicare$18,276
Procedure codes3
Dr. So's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1232024: 16736%
- Other services
- 2023: 122024: 1633%
Dr. So compared with the California median for internists, 2024
- Dr. So
- California median
- Medicare services
- 183vs 36149% below
- Medicare patients
- 72vs 15152% below
- Part D claims
- 716vs 42170% above
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. So's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. So and other internists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Simon Ka Chun So treated 72 Medicare patients in 2024, average age 72
CMS counts 72 Medicare patients who saw Dr. So in 2024. The largest group is 65 to 74, with 47 patients. 72% of them have high cholesterol, and 56% have high blood pressure. 50% are also on Medicaid. Their average risk score is 1.08, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. So's median patient age at 48, with 53% women.
Medicare patients, 202472
Average age72
Average risk score1.08
Also on Medicaid50%
Dr. So's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. So's Medicare patients by sex, 2024
- Women4563%
- Men2738%
Chronic conditions among Dr. So's Medicare patients, 2024
- High cholesterol72%
- High blood pressure56%
- Arthritis26%
- Diabetes25%
- Ischemic heart disease21%
- Osteoporosis19%
Share of Medicare patients with each condition. A patient can have several.
Dr. So's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 48
Patient panel by sex, all payers
- Women53%
- Men46%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Simon Ka Chun So wrote 1,065 Medicare Part D claims in 2024
In 2024, Dr. So wrote 1,065 Medicare Part D claims for 127 patients. 92% of them were for generic drugs. CMS names the drug for 716 of them, across 23 drugs with 11 or more claims each, at $23,310 in total drug cost. In 2023, CMS named 288 claims across 11 drugs.
Part D claims, 20241,065
Drugs named by CMS23
Total drug cost$23,310
Part D patients127
Dr. So's Part D claims by kind of drug, 2024
- Generic982 claims92%
- Brand-name and other83 claims8%
Dr. So's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. So's Part D claims, 2024
- Opioids1%14 of 1,065 claims
- Antibiotics1%13 of 1,065 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 2882024: 716149%
Drugs named by CMS: 23 in 2024, 11 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Simon Ka Chun So offers telehealth to Medicare patients
Dr. So accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. So as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Simon Ka Chun So has 1 publication on record
Dmand AI links 1 paper to Dr. So in 2022. Dr. So's most frequent co-author is Yu Miles Yu, MD.
Papers1
Dr. So's most frequent co-authors
- Yu Miles Yu, MD1 shared paper
Recent publications by Dr. So
See who Dr. So researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. So works with, so you can find a warm path to the right internists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Simon Ka Chun So received $1,198 in industry payments from 2023 to 2025
CMS Open Payments shows 47 general payments to Dr. So from 13 drug and device companies from 2023 to 2025. Food and beverage make up the largest share, 100% of the total. Novo Nordisk Inc paid the most, $363.
General payments to Dr. So by program year, 2023 to 2025
Companies that paid Dr. So the most, 2023 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Simon Ka Chun So graduated from University of Central Florida College of Medicine
Dr. So graduated from University of Central Florida College of Medicine in 2018. Dr. So is a member of ACP.
- Medical school
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. Simon Ka Chun So accepts plans from 14 insurance carriers
Dr. So is in network with 14 carriers, including Aetna, Elevance and United Healthcare. PPO plans come from the most carriers, 8. Check the plan with the practice before a visit.
- Aetna
- Elevance
- United Healthcare
- Blue Cross Blue Shield of Michigan
- HCSC
- Blue Cross Blue Shield of Massachusetts
- Alliant Health Plans
- Aspirus Health Plan
- +6 more carriersWith a free account
Plan types Dr. So accepts, by number of carriers
- PPO8
- HMO7
- Medicare6
- POS5
- EPO4
Source: Dmand AI Insurance Network Data
Sources for Dr. Simon Ka Chun So's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Simon Ka Chun So
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Simon Ka Chun So's NPI number?
Dr. Simon Ka Chun So's NPI number is 1336646132. It was assigned on April 9, 2018, and it is active in the NPI Registry.
What kind of doctor is Dr. Simon Ka Chun So?
Dr. Simon Ka Chun So is an internist in West Hills, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Simon Ka Chun So practice?
Dr. So practices at 8403 N Fallbrook Ave, West Hills, CA 91304. Dr. So's primary practice is Quest Diagnostics in West Hills, California. Dmand AI also links Dr. So to 1 physician office.
What is Dr. Simon Ka Chun So's office phone number?
The practice phone on file for Dr. So is (740) 289-3508.
What is Dr. Simon Ka Chun So's medical license number?
Dr. So's California license number on file is A166329.
Which hospitals is Dr. Simon Ka Chun So affiliated with?
Dr. So is affiliated with Hoag Hospital Newport Beach.
Does Dr. Simon Ka Chun So accept Medicare?
Yes. CMS data shows Dr. So billed Medicare for 183 services in 2024, and Dr. So accepts Medicare assignment.
Does Dr. Simon Ka Chun So offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. So as offering telehealth services.
How many Medicare patients does Dr. Simon Ka Chun So see?
CMS counts 72 Medicare patients who saw Dr. So in 2024, with an average age of 72.
Is Dr. Simon Ka Chun So board certified?
Yes. Dr. So is board certified in internal medicine by the American Board of Internal Medicine.
Show 8 more questionsShow fewer questions
What services does Dr. Simon Ka Chun So bill to Medicare?
In 2024, Dr. So's most billed Medicare services were office visit, established patient (99214), office visit, new patient (99204) and medicare service (G0439).
Where did Dr. Simon Ka Chun So go to medical school?
Dr. So graduated from University of Central Florida College of Medicine in 2018.
What drugs does Dr. Simon Ka Chun So prescribe most?
In 2024 Medicare Part D data, Dr. So's most prescribed drugs by claims were Atorvastatin Calcium, Amlodipine Besylate and Losartan Potassium.
Has Dr. Simon Ka Chun So received payments from drug or device companies?
CMS Open Payments shows $1,198 in general payments to Dr. So from 13 companies from 2023 to 2025. The largest total came from Novo Nordisk Inc.
How long has Dr. Simon Ka Chun So been practicing?
Dr. So graduated from medical school in 2018, 8 years ago.
Does Dr. Simon Ka Chun So do research?
Dmand AI links 1 publication to Dr. So.
Who does Dr. Simon Ka Chun So publish with?
Dr. So's most frequent co-authors are Yu Miles Yu, MD (1 shared paper).
What insurance does Dr. Simon Ka Chun So accept?
Dr. So is in network with 14 carriers, including Aetna, Elevance and United Healthcare. PPO plans come from the most carriers, 8. Check the plan with the practice before a visit.
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