Quick answers
- Does Christina Sivak accept Medicare assignment?
- Yes. Medicare's clinician data says Christina Sivak 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 Christina Sivak see?
- In 2024, CMS data shows 96 Original Medicare patients and 111 services for Christina Sivak. This counts Original Medicare only and measures volume, not quality.
- What is Christina Sivak's NPI number?
- 1497013916. 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 Christina Sivak, 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 | 96 |
|---|---|
| Services billed to Medicare | 111 |
| Different services or procedures | 43 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Anesthesia for nerve block and injection procedure, prone position (01992)17 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 cholesterol75%
- Arthritis72%
- Diabetes47%
- Ischemic heart disease42%
- Chronic kidney disease36%
Hospitals where Christina Sivak works
Medicare's Facility Affiliation Data lists Christina Sivak 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.
- The Corpus Christi Medical CenterCorpus Christi, TX · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 450788
Practice locations
Addresses where Christina Sivak is enrolled with Medicare (CMS data updated October 2, 2026).
- 3315 S Alameda StCorpus Christi, TX 78411 (214) 687‑0001
- 7101 S Padre Island DrCorpus Christi, TX 78412 (214) 687‑0001
Group practices
Medicare enrollment lists Christina Sivak as a member of this group (CMS data updated October 2, 2026).
- Northstar Anesthesia III PA373 clinicians in the group
Specialties
Find other clinicians: Certified Registered Nurse Anesthetist (CRNA), Texas →
Other nurse anesthetists in Corpus Christi
Clinicians with the same Medicare primary specialty in Corpus Christi, TX — not a recommendation.
Other clinicians in Northstar Anesthesia III PA
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | CNA |
|---|---|
| Graduation year | 2012 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1497013916 |
| 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