Sophie Kwok, M.D.
Nephrology Physician · Los Angeles, CA
Sophie Kwok, M.D. is a nephrology physician with a practice address in Los Angeles, California, and NPI 1639370596, issued on May 29, 2007. Check the license (California A117636, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Sophie Kwok
- Credential
- M.D.
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License number
- A117636 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1245 Wilshire Blvd Ste 514, Los Angeles, CA 90017
- Phone
- (213) 482-5141
- Enumerated
- May 29, 2007
- Record last updated
- Nov 29, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20111028000021); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest nephrology physician records → All 1,468 in California → Look up another NPI →
Also registered at 1245 Wilshire Blvd Ste 514
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jorge Doria Medina Sanchez, MDNephrology Physician1770014110
Verify Sophie Kwok in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A117636Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
48% fewer Medicare Part D claims than the average nephrology physician in 2024
757 Medicare Part D claims for 192 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims.
Most prescribed
- Amlodipine Besylate89 claims
- Losartan Potassium82 claims
- Sevelamer Carbonate71 claims
- Furosemide61 claims
- Jardiance52 claims
- Calcitriol49 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: $120.85
1 payment: food and beverage; the largest payer was Genzyme Corporation. The 8,230 providers of this specialty with any payment received $3,091.37 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
- Southern California Permanente Medical GroupHarbor City, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Sophie Kwok among 1,468 nephrology physician records in California
Sophie Kwok, M.D. is one of 1,468 nephrology physician records with a practice address in California. 88% 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 52% of them.
- NPI issued2007 · 52% of these records are older, 35% newer
- In a Medicare fileYes · 88% of these records are
- In the CMS Doctors and Clinicians fileYes · 77% of these records are
- Graduated2005 · median 2001 among the 1,128 with a school on file
- Record last updated2021 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RN0300X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Nephrology Physician providers in California
There are 1,468 nephrology physician records in California.
All 1,468 in California → Every provider in Los Angeles → Nephrology Physician nationwide →
The 8 nephrology physician records with the nearest ZIP codes
- Farid Arman, M.D.Los Angeles, CA 900171861059263
- Jorge Doria Medina Sanchez, MDLos Angeles, CA 900171770014110
- Philip Hom, M.D.Los Angeles, CA 900171740379668
- Kamran Karimi, M.D.Los Angeles, CA 900171730470220
- Tariq Shah, M.D.Los Angeles, CA 900171750452116
- Jonathan Cheng, MDLos Angeles, CA 900151538600887
- Grace ChoiLos Angeles, CA 900151831585074
- Bruce Greenfield, M.D.Los Angeles, CA 900151043224686
Common questions
What is Sophie Kwok, M.D.'s NPI number?
Sophie Kwok, M.D.'s National Provider Identifier (NPI) is 1639370596, issued on May 29, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Sophie Kwok, M.D. located?
The NPPES record lists a practice address at 1245 Wilshire Blvd Ste 514, Los Angeles, CA, 90017. Phone: (213) 482-5141. Providers update this record themselves, so call before visiting.
How can I verify Sophie Kwok, M.D.'s license?
NPPES lists California license number A117636, 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 Sophie Kwok, M.D. prescribe under Medicare Part D?
In 2024, Sophie Kwok, M.D. had 757 Medicare Part D claims for 192 beneficiaries; the average among nephrology physician prescribers was 1,465. 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.