Quick answers
- Does Stephanie L. Koontz accept Medicare assignment?
- Yes. Medicare's clinician data says Stephanie L. Koontz 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.
- What is Stephanie L. Koontz's NPI number?
- 1225108160. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Stephanie L. Koontz works
Medicare's Facility Affiliation Data lists Stephanie L. Koontz 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.
- Mount Auburn HospitalCambridge, MA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 220002
Practice locations
Addresses where Stephanie L. Koontz is enrolled with Medicare (CMS data updated October 2, 2026).
- 330 Mount Auburn StCambridge, MA 02138
- 57 Bedford St, Suite 130Lexington, MA 02420 (781) 862‑7500
Group practices
Medicare enrollment lists Stephanie L. Koontz as a member of this group (CMS data updated October 2, 2026).
- Mount Auburn Professional Services Inc231 clinicians in the group
Specialties
- Obstetrics/Gynecologyprimary
Other OB-GYNs in Cambridge
Clinicians with the same Medicare primary specialty in Cambridge, MA — not a recommendation.
Other clinicians in Mount Auburn Professional Services Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2000 (26 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1225108160 |
| 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
- 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