Dr. Mary Kathryn Hannan, MD
- Medicare services, 2020
- 93
- Part D claims, 2024
- 25
- Hospital affiliations
- 1
- State license
- 1
- Year NPI issued
- 2015
- Practice address
- 50 Irving Street N.W., Washington, DC 20422
- Practice phone
- Call (202) 745-8000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Hannan'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. Mary Kathryn Hannan is an internist in Washington, District of Columbia
Dr. Hannan practices at Washington DC VA Medical Center in Washington, District of Columbia, part of Veterans Health Administration.
Dr. Hannan's NPI, 1851787824, was assigned on April 7, 2015. Dr. Hannan holds Massachusetts license 276673.
- NPI
- 1851787824NPI Registry (opens in a new tab)
- NPI enumeration date
- April 7, 2015
- NPI status
- Active
- Practice phone
- (202) 745-8000
- 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 Affiliation Data
Dr. Mary Kathryn Hannan practices at Washington DC VA Medical Center in Washington, District of Columbia
Dr. Hannan's primary practice is Washington DC VA Medical Center, at 50 Irving Street N.W., Washington, DC 20422 in The District County. The practice phone is (202) 745-8000.
- Washington DC VA Medical Center50 Irving Street N.W., Washington, DC 20422 · The District CountyPhone(202) 745-8000
Source: Dmand AI Affiliation Data
Dr. Mary Kathryn Hannan is affiliated with 1 site of care
Dr. Hannan's primary practice is Washington DC VA Medical Center in Washington, District of Columbia, part of Veterans Health Administration. Dr. Hannan's employer is on file too: a hospital.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Mary Kathryn Hannan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Hannan practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Washington DC VA Medical Center | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Mary Kathryn Hannan is one of 660 internists in District of Columbia
Internal medicine is Dr. Hannan's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Hannan is licensed in Massachusetts.
Specialties and state licenses
- Internal medicine, MassachusettsPrimary
Internists near Dr. Hannan
Counts of internists 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. Mary Kathryn Hannan billed Medicare for 93 services in 2020
CMS data shows 93 Medicare services from Dr. Hannan across 3 procedure codes in 2020. Medicare paid $5,631 for them. Every service was in an office.
Dr. Hannan's Medicare services by type, 2019 to 2020
- 2019
- 2020
- Office and hospital visits
- 2019: 3692020: 4488%
- Other services
- 2019: 2882020: 2591%
- Surgery
- 2019: 632020: 2462%
- Tests and treatments
- 2019: 992020: 0100%
Dr. Hannan compared with the District of Columbia median for internists, 2020
- Dr. Hannan
- District of Columbia median
- Medicare services
- 93vs 35474% below
- Part D claims
- 1,022vs 1109.3 times
Medians across 591 internists in District of Columbia with Dmand AI profiles that report each measure.
Dr. Hannan's most billed Medicare procedure codes, 2020
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Hannan and other internists in District of Columbia.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Mary Kathryn Hannan's patients have a median age of 63
Across all payers, Dmand AI patient panel data puts Dr. Hannan's median patient age at 63, with 33% women.
Dr. Hannan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 63
Patient panel by sex, all payers
- Women33%
- Men63%
Source: Dmand AI Patient Panel Data
Dr. Mary Kathryn Hannan wrote 25 Medicare Part D claims in 2024
In 2024, Dr. Hannan wrote 25 Medicare Part D claims. 100% of them were for generic drugs. They cover 29 drugs, with $19,905 in total drug cost. In 2019, CMS named 2,106 claims across 58 drugs.
Dr. Hannan's most prescribed drugs by claims, 2020
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2019 to 2020
- 2019
- 2020
- Claims for drugs CMS names
- 2019: 2,1062020: 1,02251%
Drugs named by CMS: 29 in 2020, 58 in 2019.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
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Sources for Dr. Mary Kathryn Hannan'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 | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (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. Mary Kathryn Hannan
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. Mary Kathryn Hannan's NPI number?
Dr. Mary Kathryn Hannan's NPI number is 1851787824. It was assigned on April 7, 2015, and it is active in the NPI Registry.
What kind of doctor is Dr. Mary Kathryn Hannan?
Dr. Mary Kathryn Hannan is an internist in Washington, District of Columbia. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Mary Kathryn Hannan practice?
Dr. Hannan practices at 50 Irving Street N.W., Washington, DC 20422. Dr. Hannan's primary practice is Washington DC VA Medical Center in Washington, District of Columbia, part of Veterans Health Administration.
What is Dr. Mary Kathryn Hannan's office phone number?
The practice phone on file for Dr. Hannan is (202) 745-8000.
What is Dr. Mary Kathryn Hannan's medical license number?
Dr. Hannan holds Massachusetts license 276673.
Which hospitals is Dr. Mary Kathryn Hannan affiliated with?
Dr. Hannan practices at Washington DC VA Medical Center in Washington, District of Columbia.
Does Dr. Mary Kathryn Hannan accept Medicare?
Yes. CMS data shows Dr. Hannan billed Medicare for 93 services in 2020.
What services does Dr. Mary Kathryn Hannan bill to Medicare?
In 2020, Dr. Hannan's most billed Medicare services were office visit, established patient (99214), medicare service (G0439) and surgery: heart and blood vessels (36415).
What drugs does Dr. Mary Kathryn Hannan prescribe most?
In 2020 Medicare Part D data, Dr. Hannan's most prescribed drugs by claims were Atorvastatin Calcium, Lisinopril and Amlodipine Besylate.
How long has Dr. Mary Kathryn Hannan been practicing?
Dr. Hannan's NPI was assigned in 2015.
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