Quick answers
- Does Nicolas R. Lazarewicz accept Medicare assignment?
- Yes. Medicare's clinician data says Nicolas R. Lazarewicz accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Nicolas R. Lazarewicz see?
- In 2024, CMS data shows 448 Original Medicare patients and 740 services for Nicolas R. Lazarewicz. This counts Original Medicare only and measures volume, not quality.
- What is Nicolas R. Lazarewicz's NPI number?
- 1053540120. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Nicolas R. Lazarewicz, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 448 |
|---|---|
| Services billed to Medicare | 740 |
| Different services or procedures | 38 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)355 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)142 services
- New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)26 services
- Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)22 services
- Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)13 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure75%
- High cholesterol69%
- Arthritis50%
- Diabetes30%
- Depression26%
- Chronic kidney disease22%
Hospitals where Nicolas R. Lazarewicz works
Medicare's Facility Affiliation Data lists Nicolas R. Lazarewicz at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- NorthBay Medical CenterFairfield, CA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 050367
Practice locations
Addresses where Nicolas R. Lazarewicz is enrolled with Medicare (CMS data updated October 2, 2026).
- 1305 Stratford AveDixon, CA 95620 (707) 646‑5500
- 421 Nut Tree RdVacaville, CA 95687 (707) 624‑7500
- 4520 Business Ctr Dr, Suite 200Vacaville, CA 94534 (707) 646‑5500
Group practices
Medicare enrollment lists Nicolas R. Lazarewicz as a member of these groups (CMS data updated October 2, 2026).
- NorthBay Physicians Surgery Center, LLC324 clinicians in the group
- NorthBay Health Medical Foundation213 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Dixon
Clinicians with the same Medicare primary specialty in Dixon, CA — not a recommendation.
Other clinicians in NorthBay Physicians Surgery Center, LLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2009 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1053540120 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians