Quick answers
- Does Sarah J. Carstens accept Medicare assignment?
- Yes. Medicare's clinician data says Sarah J. Carstens 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 Sarah J. Carstens see?
- In 2024, CMS data shows 15 Original Medicare patients and 15 services for Sarah J. Carstens. This counts Original Medicare only and measures volume, not quality.
- What is Sarah J. Carstens's NPI number?
- 1952506867. 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 Sarah J. Carstens, 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 | 15 |
|---|---|
| Services billed to Medicare | 15 |
| Different services or procedures | 1 |
| Participating Medicare provider | Yes |
| Average age of these patients | 71 |
Most frequent services
- Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)15 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 cholesterol73%
Practice locations
Addresses where Sarah J. Carstens is enrolled with Medicare (CMS data updated October 2, 2026).
- 210 S 12th AvePhoenix, AZ 85007 (602) 254‑4282
- 220 S 12th AvePhoenix, AZ 85007 (602) 258‑8282
- 333 W Indian School RdPhoenix, AZ 85013 (602) 776‑9000
Group practices
Medicare enrollment lists Sarah J. Carstens as a member of this group (CMS data updated October 2, 2026).
- Circle the City64 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Phoenix
Clinicians with the same Medicare primary specialty in Phoenix, AZ — not a recommendation.
Other clinicians in Circle the City
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Arizona College Of Medicine |
| Graduation year | 2007 (19 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1952506867 |
| 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
- 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