Margaret Korzewski, NP
NPI 1699956359 · Nurse Practitioner · Sacramento, CA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Margaret Korzewski, NP is a Nurse Practitioner provider in Sacramento, CA (NPI 1699956359).
Provider details
- NPI number
- 1699956359
- Entity type
- Individual
- Primary specialty
- Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- NP
- Sex
- Female
- Sole proprietor
- No
- License
- 18712 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
18 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
380 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 222 | $84 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 90 | $14 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 27 | $68 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 24 | $124 |
| Smoking and Tobacco Use Intensive Counseling, 4-10 Minutes99406 | 17 | $10 |
Typical Medicare-allowed amounts for these services range $10–$124 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 9 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 127 | 36 |
| Clopidogrel Bisulfatebrand: Clopidogrel | 90 | 31 |
| Rosuvastatin Calcium | 47 | 20 |
| Rivaroxabanbrand: Xarelto | 23 | — |
| Gabapentin | 23 | — |
| Oxycodone Hcl | 23 | 23 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-11-21
- Last updated
- 2025-12-07
- Certified
- 2025-12-07
Frequently asked questions
- What is Margaret Korzewski's NPI number?
- Margaret Korzewski's National Provider Identifier (NPI) is 1699956359, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Margaret Korzewski's specialty?
- Margaret Korzewski is listed in the NPPES registry with a primary specialty of Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Margaret Korzewski located?
- Margaret Korzewski's practice location on file with NPPES is 2335 Stockton Blvd, Sacramento, CA 95817-2201.
- What is Margaret Korzewski's phone number?
- The practice phone number listed in the NPPES registry for Margaret Korzewski is (916) 734-3800.
- Does Margaret Korzewski accept Medicare?
- Margaret Korzewski is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Margaret Korzewski's NPI active?
- Yes — Margaret Korzewski's NPI (1699956359) is active in the NPPES registry as of the last update on 2025-12-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.