Maria Kristina Sia, NP, RN
Nurse Practitioner · La Puente, CA
Maria Kristina Sia, NP, RN is a nurse practitioner with a practice address in La Puente, California, and NPI 1043064975, issued on Apr 16, 2024. Check the license (California 95029660, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Maria Kristina Sia
- Credential
- NP, RN
- Primary taxonomy
- Nurse Practitioner 363L00000X
- License number
- 95029660 CA
Self-reported in NPPES; status is on the state search - Practice location
- 142 Ponderosa St, La Puente, CA 91744
- Phone
- (626) 475-7014
- Enumerated
- Apr 16, 2024
- Record last updated
- Apr 16, 2024
- Medicare enrollment
- Enrolled (PECOS I20250305000019); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest nurse practitioner records → All 8,223 in California → Look up another NPI →
Also registered at 142 Ponderosa St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Matthew Agustin SiaNurse Practitioner1598512279
Verify Maria Kristina Sia in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 95029660Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
89% fewer Medicare Part D claims than the average nurse practitioner in 2024
123 Medicare Part D claims for 73 beneficiaries, against an average of 1,109 among the 54,319 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims.
Most prescribed
- Amoxicillin-Clavulanate Potass11 claims
- Atorvastatin Calcium11 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: $41.93
2 payments; by number, the most common kind was food and beverage; the largest payer was Otsuka America Pharmaceutical, Inc. The 38,884 providers of this specialty with any payment received $791.64 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
- Foster City Medical CenterFoster City, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Maria Kristina Sia among 8,223 nurse practitioner records in California
Maria Kristina Sia, NP, RN is one of 8,223 nurse practitioner records with a practice address in California. 65% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2024, is newer than 87% of them.
- NPI issued2024 · 87% of these records are older, 7% newer
- In a Medicare fileYes · 65% of these records are
- In the CMS Doctors and Clinicians fileYes · 42% of these records are
- Graduated2017 · median 2017 among the 3,425 with a school on file
- Record last updated2024 · 45% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363L00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Nurse Practitioner providers in California
There are 8,223 nurse practitioner records in California.
All 8,223 in California → Every provider in La Puente → Nurse Practitioner nationwide →
The 8 nurse practitioner records with the nearest ZIP codes
- Matthew Agustin SiaLa Puente, CA 917441598512279
- Malea Fontanilla, NPCity Of Industry, CA 917451902741168
- Madelein Rae Lazaro, NPHacienda Heights, CA 917451730077280
- Catherine Wong, RN-NPHacienda Heights, CA 917451174656789
- Elizabeth CastroGlendora, CA 917411922505429
- Elisha Espino, FNPGlendora, CA 917411124832449
- Julia Fletcher, REGISTERED NURSE PRAGlendora, CA 917411922167675
- Hannah Hunter, AGACNPGlendora, CA 917411639090269
Common questions
What is Maria Kristina Sia, NP, RN's NPI number?
Maria Kristina Sia, NP, RN's National Provider Identifier (NPI) is 1043064975, issued on Apr 16, 2024. An NPI identifies a provider in billing; it is not a license.
Where is Maria Kristina Sia, NP, RN located?
The NPPES record lists a practice address at 142 Ponderosa St, La Puente, CA, 91744. Phone: (626) 475-7014. Providers update this record themselves, so call before visiting.
How can I verify Maria Kristina Sia, NP, RN's license?
NPPES lists California license number 95029660, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Maria Kristina Sia, NP, RN prescribe under Medicare Part D?
In 2024, Maria Kristina Sia, NP, RN had 123 Medicare Part D claims for 73 beneficiaries; the average among nurse practitioner prescribers was 1,109. 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.