Quick answers
- Does Claiborne Callahan accept Medicare assignment?
- Yes. Medicare's clinician data says Claiborne Callahan 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 Claiborne Callahan see?
- In 2024, CMS data shows 939 Original Medicare patients and 2,230 services for Claiborne Callahan. This counts Original Medicare only and measures volume, not quality.
- What is Claiborne Callahan's NPI number?
- 1033117981. 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 Claiborne Callahan, 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 | 939 |
|---|---|
| Services billed to Medicare | 2,230 |
| Different services or procedures | 29 |
| Participating Medicare provider | Yes |
| Average age of these patients | 77 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)752 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)463 services
- Imaging of optic nerve (92133)240 services
- Measurement of corneal curvature and depth of eye (92136)141 services
- Imaging of retina (92134)116 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 cholesterol75%
- High blood pressure69%
- Arthritis48%
- Diabetes23%
- Ischemic heart disease21%
- Anxiety17%
Practice locations
Addresses where Claiborne Callahan is enrolled with Medicare (CMS data updated October 2, 2026).
- 12110 Sunset Hills Rd, Suite C50Reston, VA 20190 (703) 834‑9777
- 20 Davis Ave SWLeesburg, VA 20175 (703) 349‑4599
Group practices
Medicare enrollment lists Claiborne Callahan as a member of this group (CMS data updated October 2, 2026).
- Jacqueline D Griffiths MD PC3 clinicians in the group
Specialties
- Ophthalmologyprimary
Other ophthalmologists in Reston
Clinicians with the same Medicare primary specialty in Reston, VA — not a recommendation.
Other clinicians in Jacqueline D Griffiths MD PC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Virginia School Of Medicine |
| Graduation year | 2000 (26 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1033117981 |
| 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