Quick answers
- Which hospitals does John Lynes work at?
- Medicare's official clinician data lists John Lynes at 4 hospitals: Calverthealth Medical Center, MedStar Georgetown University Hospital, MedStar Saint Mary's Hospital and Sentara Northern Virginia Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does John Lynes see patients?
- Medicare's clinician data lists 3 practice locations, including Lake Ridge, VA, Charlotte Hall, MD and Washington, DC. Call before your visit to confirm the address.
- What is John Lynes's specialty?
- Medicare lists Neurosurgery as the primary specialty.
- Does John Lynes accept Medicare assignment?
- Yes. Medicare's clinician data says John Lynes accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- Does John Lynes offer telehealth?
- Medicare's clinician data says John Lynes offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for John Lynes?
- (703) 523-9870, as listed in official Medicare / NPI Registry data.
- What is John Lynes's NPI number?
- 1225456403. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where John Lynes works
Medicare's Facility Affiliation Data lists John Lynes at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Calverthealth Medical CenterPrince Frederick, MD · Acute Care Hospital · CCN 210039
- MedStar Georgetown University HospitalWashington, DC · Acute Care Hospital · CCN 090004
- MedStar Saint Mary's HospitalLeonardtown, MD · Acute Care Hospital · CCN 210028
- Sentara Northern Virginia Medical CenterWoodbridge, VA · Acute Care Hospital · CCN 490113
Practice locations
Addresses where John Lynes is enrolled with Medicare (CMS data updated 2026-10-02).
- 12825 Minnieville Rd, Suite 202Lake Ridge, VA 22192 (703) 523‑9870
- 29955 Three Notch Rd, 100 Mmg at Charlotte HallCharlotte Hall, MD 20622 (301) 290‑5300
- 3800 Reservoir Rd NWWashington, DC 20007 (202) 444‑2000
Group practices
Medicare enrollment lists John Lynes as a member of these groups (CMS data updated 2026-10-02).
- MedStar Medical Group II LLC3,767 clinicians in the group
- Sentara Medical Group1,408 clinicians in the group
Specialties
- Neurosurgeryprimary
Other neurosurgeons in Virginia
Clinicians with the same Medicare primary specialty in Virginia — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2014 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1225456403 |
| 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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- 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