Quick answers
- Which hospitals does John Graybill work at?
- Medicare's official clinician data lists John Graybill at 2 hospitals: Johns Hopkins Bayview Medical Center and Meritus Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does John Graybill see patients?
- Medicare's clinician data lists 5 practice locations, including Hagerstown, MD and Baltimore, MD. Call before your visit to confirm the address.
- What is John Graybill's specialty?
- Medicare lists General Surgery as the primary specialty.
- Does John Graybill accept Medicare assignment?
- Medicare's clinician data says John Graybill may accept Medicare assignment (as of 2026-10-02). Ask the office whether they accept it for your visit.
- What is the phone number for John Graybill?
- (301) 704-4350, as listed in official Medicare / NPI Registry data.
- What is John Graybill's NPI number?
- 1033312863. 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 Graybill works
Medicare's Facility Affiliation Data lists John Graybill at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Johns Hopkins Bayview Medical CenterBaltimore, MD · Acute Care Hospital · CCN 210029
- Meritus Medical CenterHagerstown, MD · Acute Care Hospital · CCN 210001
Practice locations
Addresses where John Graybill is enrolled with Medicare (CMS data updated 2026-10-02).
- 11110 Medical Campus Rd, Suite 143Hagerstown, MD 21742 (301) 704‑4350
- 11116 Medical Campus RdHagerstown, MD 21742 (301) 790‑8000
- 4940 Eastern AveBaltimore, MD 21224
- 600 N Wolf StBaltimore, MD 21287
- 600 N Wolfe St, Blalock 266Baltimore, MD 21287 (410) 502‑4340
Group practices
Medicare enrollment lists John Graybill as a member of these groups (CMS data updated 2026-10-02).
- Johns Hopkins University2,909 clinicians in the group
- Meritus Medical Center Inc743 clinicians in the group
- Medical Practices of Antietam, LLC234 clinicians in the group
Specialties
- General Surgeryprimary
Other general surgeons in Hagerstown
Clinicians with the same Medicare primary specialty in Hagerstown, MD — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2005 |
| Gender (as listed) | Male |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1033312863 |
| 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