Margaret Korzewski, NP
Nurse Practitioner · Sacramento, CA
Margaret Korzewski, NP is a nurse practitioner with a practice address in Sacramento, California, and NPI 1699956359, issued on Nov 21, 2007. Check the license (California 18712, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Margaret Korzewski
- Credential
- NP
- Primary taxonomy
- Nurse Practitioner 363L00000X
- License number
- 18712 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2335 Stockton Blvd, Sacramento, CA 95817
- Phone
- (916) 734-3800
- Enumerated
- Nov 21, 2007
- Record last updated
- Dec 7, 2025
- Fax
- (916) 734-3801
- Medicaid ID
- 363L00000X-NP CA
- Medicare enrollment
- Enrolled (PECOS I20171206003319); 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 2335 Stockton Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Margaret Korzewski in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 18712Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
59% fewer Medicare Part D claims than the average nurse practitioner in 2024
454 Medicare Part D claims for 113 beneficiaries, against an average of 1,109 among the 54,319 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 27 claims were for opioids.
Most prescribed
- Atorvastatin Calcium127 claims
- Clopidogrel90 claims
- Rosuvastatin Calcium47 claims
- Gabapentin23 claims
- Oxycodone Hcl23 claims
- Xarelto23 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
- Regents OF The Univ OF CASacramento, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Margaret Korzewski among 8,223 nurse practitioner records in California
Margaret Korzewski, NP 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 2007, is newer than 18% of them.
- NPI issued2007 · 18% of these records are older, 73% newer
- In a Medicare fileYes · 65% of these records are
- In the CMS Doctors and Clinicians fileYes · 42% of these records are
- Graduated2007 · median 2017 among the 3,425 with a school on file
- Record last updated2025 · 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 Sacramento → Nurse Practitioner nationwide →
The 8 nurse practitioner records with the nearest ZIP codes
- Lisa Ashley, RN, PNPSacramento, CA 958171689656928
- Stephanie Bianchi, FNPSacramento, CA 958171851374821
- Rhonda Garcia, NPSacramento, CA 958171922083757
- Abigail Inkster, RN, FNPSacramento, CA 958171104809474
- Karen Latimer, N.P.Sacramento, CA 958171992788590
- Barbra Lord, RN, MSN, CNS, NPSacramento, CA 958171962486407
- Bonnie McCracken, NURSE PRACTITIONERSacramento, CA 958171699757104
- Janice Noort, NPSacramento, CA 958171700862372
Common questions
What is Margaret Korzewski, NP's NPI number?
Margaret Korzewski, NP's National Provider Identifier (NPI) is 1699956359, issued on Nov 21, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Margaret Korzewski, NP located?
The NPPES record lists a practice address at 2335 Stockton Blvd, Sacramento, CA, 95817. Phone: (916) 734-3800. Providers update this record themselves, so call before visiting.
How can I verify Margaret Korzewski, NP's license?
NPPES lists California license number 18712, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Margaret Korzewski, NP prescribe under Medicare Part D?
In 2024, Margaret Korzewski, NP had 454 Medicare Part D claims for 113 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.