Sumi Wong-Yap, R.N., N.P.
Adult Health Nurse Practitioner · Oakland, CA
Sumi Wong-Yap, R.N., N.P. is an adult health nurse practitioner with a practice address in Oakland, California, and NPI 1457696312, issued on Dec 4, 2012. Check the license (California 21015, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Sumi Wong-Yap
- Credential
- R.N., N.P.
- Primary taxonomy
- Adult Health Nurse Practitioner 363LA2200X
- License number
- 21015 CA
Self-reported in NPPES; status is on the state search - Practice location
- 818 Webster St., Oakland, CA 94607
- Phone
- (510) 986-6800
- Enumerated
- Dec 4, 2012
- Record last updated
- Dec 4, 2012 (not updated in 14 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20130513000300); accepts Medicare assignment
- Medical or professional school
- University Of California, San Francisco School Of Medicine, 2011
- Entity
- Type 1 · individual
8 nearest adult health nurse practitioner records → All 1,405 in California → Look up another NPI →
Verify Sumi Wong-Yap in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 21015Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.6 times the Medicare Part D claims of the average adult health nurse practitioner in 2024
4,641 Medicare Part D claims for 1,035 beneficiaries, against an average of 1,280 among the 16,937 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 15 claims were for opioids.
Most prescribed
- Atorvastatin Calcium565 claims
- Amlodipine Besylate388 claims
- Metformin Hcl251 claims
- Losartan Potassium237 claims
- Lisinopril209 claims
- Alendronate Sodium182 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.
Bills Medicare through one group practice
- Asian Health ServicesOakland, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Sumi Wong-Yap among 1,405 adult health nurse practitioner records in California
Sumi Wong-Yap, R.N., N.P. is one of 1,405 adult health nurse practitioner records with a practice address in California. 56% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2012, is newer than 47% of them.
- NPI issued2012 · 47% of these records are older, 48% newer
- In a Medicare fileYes · 56% of these records are
- In the CMS Doctors and Clinicians fileYes · 31% of these records are
- Graduated2011 · median 2013 among the 441 with a school on file
- Record last updated2012 · 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 363LA2200X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Adult Health Nurse Practitioner providers in California
There are 1,405 adult health nurse practitioner records in California.
All 1,405 in California → Every provider in Oakland → Adult Health Nurse Practitioner nationwide →
The 8 adult health nurse practitioner records with the nearest ZIP codes
- Tarquin Alwattar, NP-COakland, CA 946071619242393
- Laurel Barber, RN, NPOakland, CA 946071790031946
- Victoria Becker, NPOakland, CA 946071265415202
- Alice Kahn, RN, NPOakland, CA 946071639289887
- Deborah Schwab, MSN, ANP-BC, RNOakland, CA 946071144373127
- Aminah Al-Saeedi, NP-COakland, CA 946081699016030
- Leah Bushman, NPOakland, CA 946061871873869
- Hannah Cifuentes, NPOakland, CA 946081245015601
Common questions
What is Sumi Wong-Yap, R.N., N.P.'s NPI number?
Sumi Wong-Yap, R.N., N.P.'s National Provider Identifier (NPI) is 1457696312, issued on Dec 4, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Sumi Wong-Yap, R.N., N.P. located?
The NPPES record lists a practice address at 818 Webster St., Oakland, CA, 94607. Phone: (510) 986-6800. Providers update this record themselves, so call before visiting.
How can I verify Sumi Wong-Yap, R.N., N.P.'s license?
NPPES lists California license number 21015, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Sumi Wong-Yap, R.N., N.P. prescribe under Medicare Part D?
In 2024, Sumi Wong-Yap, R.N., N.P. had 4,641 Medicare Part D claims for 1,035 beneficiaries; the average among adult health nurse practitioner prescribers was 1,280. 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.