Quick answers
- Does Molly M. Rater accept Medicare assignment?
- Yes. Medicare's clinician data says Molly M. Rater 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 Molly M. Rater see?
- In 2024, CMS data shows 339 Original Medicare patients and 651 services for Molly M. Rater. This counts Original Medicare only and measures volume, not quality.
- What is Molly M. Rater's NPI number?
- 1821234519. 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 Molly M. Rater, 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 | 339 |
|---|---|
| Services billed to Medicare | 651 |
| Different services or procedures | 8 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)470 services
- Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report (93000)128 services
- Telephone medical discussion with physician, 21-30 minutes (99443)31 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%
- Ischemic heart disease54%
- Heart failure53%
- Arthritis50%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)44%
Practice locations
Addresses where Molly M. Rater is enrolled with Medicare (CMS data updated October 2, 2026).
- 1 Barnes Jew Hosp PlzSaint Louis, MO 63110 (314) 747‑3000
- 1020 N Mason RdSaint Louis, MO 63141
- 4500 Forest Park AveSaint Louis, MO 63108
- 4921 Parkview PlSaint Louis, MO 63110
Group practices
Medicare enrollment lists Molly M. Rater as a member of this group (CMS data updated October 2, 2026).
- Washington University3,029 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Saint Louis
Clinicians with the same Medicare primary specialty in Saint Louis, MO — not a recommendation.
Other clinicians in Washington University
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2008 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1821234519 |
| 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