Quick answers
- Does Catherine G. Njiru Sewer accept Medicare assignment?
- Yes. Medicare's clinician data says Catherine G. Njiru Sewer 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 Catherine G. Njiru Sewer see?
- In 2024, CMS data shows 26 Original Medicare patients and 52 services for Catherine G. Njiru Sewer. This counts Original Medicare only and measures volume, not quality.
- What is Catherine G. Njiru Sewer's NPI number?
- 1063914836. 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 Catherine G. Njiru Sewer, 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 | 26 |
|---|---|
| Services billed to Medicare | 52 |
| Different services or procedures | 5 |
| Participating Medicare provider | Yes |
| Average age of these patients | 70 |
Most frequent services
- Blood glucose (sugar) test performed by hand-held instrument (82962)33 services
- Hemoglobin a1c level (83036)16 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%
- Diabetes75%
- High cholesterol62%
- Arthritis46%
Practice locations
Addresses where Catherine G. Njiru Sewer is enrolled with Medicare (CMS data updated October 2, 2026).
- 11915 Georgia AveWheaton, MD 20902 (301) 942‑4505
- 134 Owensville RdWest River, MD 20778 (410) 867‑4700
- 18045 Georgia AveOlney, MD 20832 (301) 774‑8026
- 4507 Stanford StBethesda, MD 20815 (443) 302‑9258
Group practices
Medicare enrollment lists Catherine G. Njiru Sewer as a member of these groups (CMS data updated October 2, 2026).
- MedStar Urgent Care LLC300 clinicians in the group
- Owensville Primary Care, Inc4 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in Wheaton
Clinicians with the same Medicare primary specialty in Wheaton, MD — not a recommendation.
Other clinicians in MedStar Urgent Care LLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | Edward Via Col Of Osteo Medicine-Virginia Campus |
| Graduation year | 2018 (8 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1063914836 |
| 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