Dr. Christina Ann Ryan, DO
- Industry payments
- $542
- State license
- 1
- Year NPI issued
- 2019
- 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. Ryan'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. Christina Ann Ryan is a hematologist and oncologist in Bethesda, Maryland
Dr. Ryan practices at Walter Reed National Military Medical Center in Bethesda, Maryland.
Dr. Ryan's NPI, 1083271456, was assigned on May 21, 2019. Dr. Ryan holds Missouri license 2023003810.
- NPI
- 1083271456NPI Registry (opens in a new tab)
- NPI enumeration date
- May 21, 2019
- NPI status
- Active
- Practice phone
- (301) 295-4934
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. Christina Ann Ryan practices at Walter Reed National Military Medical Center in Bethesda, Maryland
Dr. Ryan'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. Christina Ann Ryan is affiliated with 1 site of care
Dr. Ryan's primary practice is Walter Reed National Military Medical Center in Bethesda, Maryland.
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dmand AI tracks the EHR system at Dr. Christina Ann Ryan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Ryan practices. 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 |
Source: Dmand AI Technology Install Data
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Dr. Christina Ann Ryan is one of 245 hematologists and oncologists in Maryland
Hematology and oncology is Dr. Ryan's primary specialty in the NPI Registry, under taxonomy code 207RH0003X. Dr. Ryan is licensed in Missouri.
Specialties and state licenses
- Hematology and oncology, MissouriPrimary
Hematologists and oncologists near Dr. Ryan
Counts of hematologists and oncologists 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. Christina Ann Ryan's patients have a median age of 68
Across all payers, Dmand AI patient panel data puts Dr. Ryan's median patient age at 68, with 38% women.
Dr. Ryan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 68
Patient panel by sex, all payers
- Women38%
- Men62%
Source: Dmand AI Patient Panel Data
Dr. Christina Ann Ryan received $542 in industry payments from 2024 to 2025
CMS Open Payments shows 20 general payments to Dr. Ryan from 13 drug and device companies from 2024 to 2025. Food and beverage make up the largest share, 100% of the total. Gilead Sciences, Inc. paid the most, $97.
General payments to Dr. Ryan by program year, 2024 to 2025
Companies that paid Dr. Ryan the most, 2024 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Christina Ann Ryan'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 Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| 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. Christina Ann Ryan
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. Christina Ann Ryan's NPI number?
Dr. Christina Ann Ryan's NPI number is 1083271456. It was assigned on May 21, 2019, and it is active in the NPI Registry.
What kind of doctor is Dr. Christina Ann Ryan?
Dr. Christina Ann Ryan is a hematologist and oncologist in Bethesda, Maryland. The primary specialty in the NPI Registry is Hematology & Oncology Physician (taxonomy code 207RH0003X).
Where does Dr. Christina Ann Ryan practice?
Dr. Ryan practices at 8901 Rockville Pike, Bethesda, MD 20889. Dr. Ryan's primary practice is Walter Reed National Military Medical Center in Bethesda, Maryland.
What is Dr. Christina Ann Ryan's office phone number?
The practice phone on file for Dr. Ryan is (301) 295-4934.
What is Dr. Christina Ann Ryan's medical license number?
Dr. Ryan holds Missouri license 2023003810.
Has Dr. Christina Ann Ryan received payments from drug or device companies?
CMS Open Payments shows $542 in general payments to Dr. Ryan from 13 companies from 2024 to 2025. The largest total came from Gilead Sciences, Inc.
How long has Dr. Christina Ann Ryan been practicing?
Dr. Ryan's NPI was assigned in 2019.
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