Quick answers
- Does Rebecca A. Haefner accept Medicare assignment?
- Yes. Medicare's clinician data says Rebecca A. Haefner 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 Rebecca A. Haefner see?
- In 2024, CMS data shows 190 Original Medicare patients and 205 services for Rebecca A. Haefner. This counts Original Medicare only and measures volume, not quality.
- What is Rebecca A. Haefner's NPI number?
- 1538109467. 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 Rebecca A. Haefner, 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 | 190 |
|---|---|
| Services billed to Medicare | 205 |
| Different services or procedures | 54 |
| Participating Medicare provider | Yes |
| Average age of these patients | 70 |
Most frequent services
- Anesthesia for other procedure on urinary system through urethra (00910)21 services
- Anesthesia for other procedure on upper abdomen (00790)15 services
- Anesthesia for x-ray or radiation therapy (01922)13 services
- Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope (00731)12 services
- Anesthesia for other procedure on large bowel using an endoscope (00811)11 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%
- Arthritis46%
- Chronic kidney disease35%
- Diabetes33%
- Anxiety32%
Practice locations
Addresses where Rebecca A. Haefner is enrolled with Medicare (CMS data updated October 2, 2026).
- 1201 S Grand BlvdSaint Louis, MO 63104 (314) 257‑8000
- 1225 S Grand BlvdSaint Louis, MO 63104 (314) 257‑8000
Group practices
Medicare enrollment lists Rebecca A. Haefner as a member of this group (CMS data updated October 2, 2026).
- SSM Health Slu Hospital Anesthesia Physician Billing LLC102 clinicians in the group
Specialties
- Anesthesiologyprimary
Other anesthesiologists in Saint Louis
Clinicians with the same Medicare primary specialty in Saint Louis, MO — not a recommendation.
Other clinicians in SSM Health Slu Hospital Anesthesia Physician Billing LLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Missouri, Columbia School Of Medicine |
| Graduation year | 1988 (38 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1538109467 |
| 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