Katherine Ko, NP
Family Nurse Practitioner · Diamond Bar, CA
Katherine Ko, NP is a family nurse practitioner with a practice address in Diamond Bar, California, and NPI 1679038103, issued on Feb 8, 2019. Check the license (California 95009181, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Katherine Ko
- Credential
- NP
- Primary taxonomy
- Family Nurse Practitioner 363LF0000X
- License number
- 95009181 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2705 S Diamond Bar Blvd Ste 100, Diamond Bar, CA 91765
- Phone
- (626) 965-1988
- Enumerated
- Feb 8, 2019
- Record last updated
- Feb 8, 2019 (not updated in 7 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest family nurse practitioner records → All 16,966 in California → Look up another NPI →
Also registered at 2705 S Diamond Bar Blvd Ste 100
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Lisa Huang, NPAdult Health Nurse Practitioner1629634852
- Crystal HuongFamily Nurse Practitioner1992376636
Verify Katherine Ko in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 95009181Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
96% fewer Medicare Part D claims than the average family nurse practitioner in 2024
48 Medicare Part D claims for 20 beneficiaries, against an average of 1,305 among the 140,557 providers of this specialty who prescribed in Part D.
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: $26.10
1 payment: food and beverage; the largest payer was GlaxoSmithKline, LLC. The 99,489 providers of this specialty with any payment received $650.95 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.
Katherine Ko among 16,966 family nurse practitioner records in California
Katherine Ko, NP is one of 16,966 family nurse practitioner records with a practice address in California. 67% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2019, is newer than 50% of them.
- NPI issued2019 · 50% of these records are older, 44% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileNo · 40% of these records are
- Record last updated2019 · 42% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LF0000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
21 family nurse practitioner records list a practice address in Diamond Bar
They are 21 of the 598 NPPES records with a practice address in Diamond Bar, and 16,966 family nurse practitioner records in California.
All 16,966 in California → Every provider in Diamond Bar → Family Nurse Practitioner nationwide →
The 8 family nurse practitioner records with the nearest ZIP codes
- Lizbeth BarraganDiamond Bar, CA 917651730549445
- Connie ChaoDiamond Bar, CA 917651225537061
- Rachel Doronio, NP-CDiamond Bar, CA 917651780299289
- Brandi Funk, FNP-CDiamond Bar, CA 917651679753354
- Crystal HuongDiamond Bar, CA 917651992376636
- Rachael Maldonado, NPDiamond Bar, CA 917651609450253
- Teresita Nadres, NPDiamond Bar, CA 917651801597398
- Nikolas Nemeth, NPDiamond Bar, CA 917651538869946
Common questions
What is Katherine Ko, NP's NPI number?
Katherine Ko, NP's National Provider Identifier (NPI) is 1679038103, issued on Feb 8, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Katherine Ko, NP located?
The NPPES record lists a practice address at 2705 S Diamond Bar Blvd Ste 100, Diamond Bar, CA, 91765. Phone: (626) 965-1988. Providers update this record themselves, so call before visiting.
How can I verify Katherine Ko, NP's license?
NPPES lists California license number 95009181, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Katherine Ko, NP prescribe under Medicare Part D?
In 2024, Katherine Ko, NP had 48 Medicare Part D claims for 20 beneficiaries; the average among family nurse practitioner prescribers was 1,305. 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.