Quick answers
- Does Cristina B. Sanger accept Medicare assignment?
- Yes. Medicare's clinician data says Cristina B. Sanger 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 Cristina B. Sanger see?
- In 2024, CMS data shows 76 Original Medicare patients and 258 services for Cristina B. Sanger. This counts Original Medicare only and measures volume, not quality.
- What is Cristina B. Sanger's NPI number?
- 1851617617. 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 Cristina B. Sanger, 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 | 76 |
|---|---|
| Services billed to Medicare | 258 |
| Different services or procedures | 68 |
| Participating Medicare provider | Yes |
| Average age of these patients | 72 |
Most frequent services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)24 services
- Diagnostic exam of anus using an endoscope (46600)18 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)15 services
- Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)14 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 pressure71%
- High cholesterol67%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)58%
- Anxiety34%
- Arthritis32%
- Depression30%
Hospitals where Cristina B. Sanger works
Medicare's Facility Affiliation Data lists Cristina B. Sanger 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.
- University of WI Hospitals & Clinics AuthorityMadison, WI · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 520098
Practice locations
Addresses where Cristina B. Sanger is enrolled with Medicare (CMS data updated October 2, 2026).
- 600 Highland AveMadison, WI 53792 (608) 263‑6400
- 750 University RowMadison, WI 53705 (608) 890‑5000
Group practices
Medicare enrollment lists Cristina B. Sanger as a member of this group (CMS data updated October 2, 2026).
- University of Wisconsin Medical Foundation Inc2,553 clinicians in the group
Specialties
Find other Colorectal Surgery (Proctology) doctors in Wisconsin →
Other colorectal surgeons in Madison
Clinicians with the same Medicare primary specialty in Madison, WI — not a recommendation.
Other clinicians in University of Wisconsin Medical Foundation Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Medical University Of South Carolina College Of Medicine |
| Graduation year | 2010 (16 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1851617617 |
| 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