Dr. John Christopher Graybill, MD
- Hospital affiliations
- 2
- Industry payments
- $216
- Medical groups
- 4
- State license
- 1
- Year NPI issued
- 2007
- Practice address
- 8901 Rockville Pike, Bethesda, MD 20889
- Practice phone
- Call (301) 295-4934
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Walter Reed National Military Medical Center
Bethesda, Maryland
Find Dr. Graybill's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. John Christopher Graybill is a trauma surgery physician in Bethesda, Maryland
Dr. Graybill practices at Walter Reed National Military Medical Center in Bethesda, Maryland.
Dr. Graybill's NPI, 1033312863, was assigned on June 8, 2007. Dr. Graybill holds Virginia license 0101240898.
- NPI
- 1033312863NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8325385479
- NPI enumeration date
- June 8, 2007
- NPI status
- Active
- Practice phone
- (301) 295-4934
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 47
- Medical school graduation
- 2005
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. John Christopher Graybill practices at Walter Reed National Military Medical Center in Bethesda, Maryland
Dr. Graybill's primary practice is Walter Reed National Military Medical Center, at 8901 Rockville Pike, Bethesda, MD 20889 in Montgomery County. The practice phone is (301) 295-4934.
- Walter Reed National Military Medical Center8901 Rockville Pike, Bethesda, MD 20889 · Montgomery CountyPhone(301) 295-4934
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. John Christopher Graybill is affiliated with 5 sites of care and 4 medical groups
Dr. Graybill's primary practice is Walter Reed National Military Medical Center in Bethesda, Maryland. Dr. Graybill is also affiliated with Johns Hopkins Bayview Medical Center. The medical group on file is Johns Hopkins University. Dmand AI also links Dr. Graybill to 1 more hospital, 3 medical groups and 2 group practices and clinics, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. John Christopher Graybill's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Graybill practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Walter Reed National Military Medical Center | Available with a free account |
| +4 more sites and 3 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. John Christopher Graybill is one of 30 trauma surgery physicians in Maryland
Trauma surgery is Dr. Graybill's primary specialty in the NPI Registry, under taxonomy code 2086S0127X. Dr. Graybill is licensed in Virginia.
Specialties and state licenses
- Trauma surgery, VirginiaPrimary
Trauma surgery physicians near Dr. Graybill
Counts of trauma surgery physicians with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. John Christopher Graybill's patients have a median age of 75
Across all payers, Dmand AI patient panel data puts Dr. Graybill's median patient age at 75, with 44% women.
Dr. Graybill's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 75
Patient panel by sex, all payers
- Women44%
- Men56%
Source: Dmand AI Patient Panel Data
How Dr. John Christopher Graybill takes part in Medicare
Colonoscopy: 1 to 10 procedures (CMS shows small counts as a range)
Removal of tissue: 1 to 10 procedures (CMS shows small counts as a range)
Source: Doctors and Clinicians Utilization Data (CMS)
Dr. John Christopher Graybill received $216 in industry payments from 2019 to 2022
CMS Open Payments shows 2 general payments to Dr. Graybill from 2 drug and device companies from 2019 to 2022. Food and beverage make up the largest share, 100% of the total. Acell, Inc. paid the most, $109.
General payments to Dr. Graybill by program year, 2019 to 2022
Companies that paid Dr. Graybill the most, 2019 to 2022
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. John Christopher Graybill's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. John Christopher Graybill
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. John Christopher Graybill's NPI number?
Dr. John Christopher Graybill's NPI number is 1033312863. It was assigned on June 8, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. John Christopher Graybill?
Dr. John Christopher Graybill is a trauma surgery physician in Bethesda, Maryland. The primary specialty in the NPI Registry is Trauma Surgery Physician (taxonomy code 2086S0127X).
Where does Dr. John Christopher Graybill practice?
Dr. Graybill practices at 8901 Rockville Pike, Bethesda, MD 20889. Dr. Graybill's primary practice is Walter Reed National Military Medical Center in Bethesda, Maryland. Dmand AI also links Dr. Graybill to 1 hospital, 3 medical groups and 2 group practices and clinics.
What is Dr. John Christopher Graybill's office phone number?
The practice phone on file for Dr. Graybill is (301) 295-4934.
What is Dr. John Christopher Graybill's medical license number?
Dr. Graybill holds Virginia license 0101240898.
Which hospitals is Dr. John Christopher Graybill affiliated with?
Dr. Graybill is affiliated with Johns Hopkins Bayview Medical Center. Dmand AI links Dr. Graybill to 1 more hospital.
What medical group is Dr. John Christopher Graybill part of?
Dr. Graybill is linked to Johns Hopkins University. Dmand AI links Dr. Graybill to 3 more medical groups.
Has Dr. John Christopher Graybill received payments from drug or device companies?
CMS Open Payments shows $216 in general payments to Dr. Graybill from 2 companies from 2019 to 2022. The largest total came from Acell, Inc.
How long has Dr. John Christopher Graybill been practicing?
Dr. Graybill graduated from medical school in 2005, 21 years ago.
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