Quick answers
- Does Gwendoline Z. Songwe accept Medicare assignment?
- Yes. Medicare's clinician data says Gwendoline Z. Songwe 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 Gwendoline Z. Songwe see?
- In 2024, CMS data shows 553 Original Medicare patients and 4,411 services for Gwendoline Z. Songwe. This counts Original Medicare only and measures volume, not quality.
- What is Gwendoline Z. Songwe's NPI number?
- 1720429368. 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 Gwendoline Z. Songwe, 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 | 553 |
|---|---|
| Services billed to Medicare | 4,411 |
| Different services or procedures | 22 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Microfluid analysis of tears (83861)1,500 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)649 services
- Exam of visual field with extended testing (92083)456 services
- Imaging of retina (92134)377 services
- Photography of the retina (92250)317 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%
- Arthritis40%
- Diabetes39%
- Chronic kidney disease23%
- Ischemic heart disease22%
Practice locations
Addresses where Gwendoline Z. Songwe is enrolled with Medicare (CMS data updated October 2, 2026).
- 14201 Laurel Park Dr, Suite 208Laurel, MD 20707 (301) 498‑6616
Group practices
Medicare enrollment lists Gwendoline Z. Songwe as a member of this group (CMS data updated October 2, 2026).
- Ronald S. Oser, MD, PA2 clinicians in the group
Specialties
- Optometryprimary
Other optometrists in Laurel
Clinicians with the same Medicare primary specialty in Laurel, MD — not a recommendation.
Other clinicians in Ronald S. Oser, MD, PA
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | OD |
|---|---|
| Graduation year | 2012 (14 years since optometry school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1720429368 |
| 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