Quick answers
- Does Joanna M. Barnett accept Medicare assignment?
- Medicare's clinician data says Joanna M. Barnett may accept Medicare assignment (as of October 2, 2026). Ask the office whether they accept it for your visit.
- How many Medicare patients does Joanna M. Barnett see?
- In 2024, CMS data shows 118 Original Medicare patients and 564 services for Joanna M. Barnett. This counts Original Medicare only and measures volume, not quality.
- What is Joanna M. Barnett's NPI number?
- 1215959663. 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 Joanna M. Barnett, 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 | 118 |
|---|---|
| Services billed to Medicare | 564 |
| Different services or procedures | 13 |
| Participating Medicare provider | Yes |
| Average age of these patients | 72 |
Most frequent services
- Photography of the retina (92250)143 services
- Exam of visual field with extended testing (92083)137 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)128 services
- Evaluation of eye adaptation to light and dark with interpretation and report (92284)31 services
- New patient complete exam of visual system (92004)30 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 cholesterol74%
- Diabetes32%
- Arthritis31%
- Ischemic heart disease16%
- Chronic kidney disease13%
Practice locations
Addresses where Joanna M. Barnett is enrolled with Medicare (CMS data updated October 2, 2026).
- 21100 Dulles Town Cir, Suite 297Sterling, VA 20166 (703) 421‑5333
Group practices
Medicare enrollment lists Joanna M. Barnett as a member of this group (CMS data updated October 2, 2026).
- Dr Joanna Barnett and Associates Inc2 clinicians in the group
Specialties
- Optometryprimary
Other optometrists in Sterling
Clinicians with the same Medicare primary specialty in Sterling, VA — not a recommendation.
Other clinicians in Dr Joanna Barnett and Associates Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | OD |
|---|---|
| Optometry school | Pacific Medical College |
| Graduation year | 2000 (26 years since optometry school) |
| Gender (as listed) | Female |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1215959663 |
| 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