Philip Seungwoo Yang, MD
Nephrology Physician · Fountain Valley, CA
Philip Seungwoo Yang, MD is a nephrology physician with a practice address in Fountain Valley, California, and NPI 1821157553, issued on Dec 8, 2006. Check the license (California A84891, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Philip Seungwoo Yang
- Credential
- MD
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License number
- A84891 CA
Self-reported in NPPES; status is on the state search - Practice location
- 11100 Warner Ave Ste 158, Fountain Valley, CA 92708
- Phone
- (714) 486-2586
- Enumerated
- Dec 8, 2006
- Record last updated
- Sep 16, 2019 (not updated in 7 years: call before relying on the address or phone)
- Fax
- (714) 432-8885
- Medicaid ID
- A84891 CA
- Medicare enrollment
- Enrolled (PECOS I20050603000729); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest nephrology physician records → All 1,468 in California → Look up another NPI →
Also registered at 11100 Warner Ave Ste 158
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Son Dinh, M.D.Nephrology Physician1174564256
- Essam Mostafa, M.D.Nephrology Physician1316932270
Verify Philip Seungwoo Yang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A84891Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
5.0 times the Medicare Part D claims of the average nephrology physician in 2024
7,381 Medicare Part D claims for 635 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D. Brand-name drugs were 24% of claims. 26 claims were for opioids.
Most prescribed
- Hydralazine Hcl627 claims
- Amlodipine Besylate615 claims
- Calcitriol595 claims
- Metoprolol Succinate565 claims
- Jardiance506 claims
- Farxiga376 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: $697.96
26 payments; by number, the most common kind was food and beverage; the largest payer was Boehringer Ingelheim Pharmaceuticals, Inc. 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
- Premier Nephrology OF Orange County IncFountain Valley, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Philip Seungwoo Yang among 1,468 nephrology physician records in California
Philip Seungwoo Yang, MD 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 2006, is newer than 10% of them.
- NPI issued2006 · 10% of these records are older, 48% newer
- In a Medicare fileYes · 88% of these records are
- In the CMS Doctors and Clinicians fileYes · 77% of these records are
- Graduated2002 · median 2001 among the 1,128 with a school on file
- Record last updated2019 · 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 Fountain Valley → Nephrology Physician nationwide →
The 8 nephrology physician records with the nearest ZIP codes
- Zavier Ahmed, M.D.Fountain Valley, CA 927081255677134
- Sandeep Dang, M.D.Fountain Valley, CA 927081730146937
- Son Dinh, M.D.Fountain Valley, CA 927081174564256
- Lalitha Durairaj, MDFountain Valley, CA 927081306894548
- Afsaneh Haftbaradaran Mohammadi, M.D.Fountain Valley, CA 927081902040009
- Joginder Jodhka, MDFountain Valley, CA 927081558379503
- Gaytri Manek, MDFountain Valley, CA 927081124298237
- Tarun Marwaha, M.D.Fountain Valley, CA 927081407964976
Common questions
What is Philip Seungwoo Yang, MD's NPI number?
Philip Seungwoo Yang, MD's National Provider Identifier (NPI) is 1821157553, issued on Dec 8, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Philip Seungwoo Yang, MD located?
The NPPES record lists a practice address at 11100 Warner Ave Ste 158, Fountain Valley, CA, 92708. Phone: (714) 486-2586. Providers update this record themselves, so call before visiting.
How can I verify Philip Seungwoo Yang, MD's license?
NPPES lists California license number A84891, 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 Philip Seungwoo Yang, MD prescribe under Medicare Part D?
In 2024, Philip Seungwoo Yang, MD had 7,381 Medicare Part D claims for 635 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.