Dr. Walter M. O'Brien, MD
- Medicare services, 2022
- 1,507
- Part D claims, 2023
- 191
- MIPS score, 2024
- 56
- Hospital affiliations
- 1
- Industry payments
- $20,349
- Practice address
- 4320 Seminary Rd, Alexandria, VA 22304
- Practice phone
- Call (703) 504-3167
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. O'Brien'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. Walter M. O'Brien is a urologist in Alexandria, Virginia
Dr. O'Brien practices at Inova Alexandria Hospital in Alexandria, Virginia, part of Inova Health Care Services.
Dr. O'Brien's NPI, 1730173360, was assigned on September 9, 2005. Dr. O'Brien graduated from Jefferson Medical College of Thomas Jefferson University in 1983. Dr. O'Brien holds Virginia license 0101038671.
- NPI
- 1730173360NPI Registry (opens in a new tab)
- NPI enumeration date
- September 9, 2005
- NPI status
- Active
- Practice phone
- (703) 504-3167
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 69
- Medical school graduation
- 1983
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Walter M. O'Brien practices at Inova Alexandria Hospital in Alexandria, Virginia
Dr. O'Brien's primary practice is Inova Alexandria Hospital, at 4320 Seminary Rd, Alexandria, VA 22304 in Alexandria City. The practice phone is (703) 504-3167.
- Inova Alexandria Hospital4320 Seminary Rd, Alexandria, VA 22304 · Alexandria CityPhone(703) 504-3167
Source: Dmand AI Affiliation Data
Dr. Walter M. O'Brien is affiliated with 2 sites of care and 1 medical group
Dr. O'Brien's primary practice is Inova Alexandria Hospital in Alexandria, Virginia, part of Inova Health Care Services. The medical group on file is Loudoun Medical Group. Dmand AI also links Dr. O'Brien to 1 more group practice or clinic, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Walter M. O'Brien's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. O'Brien practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Inova Alexandria Hospital | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dmand AI maps EHR vendors, IT decision makers and buying committees across Inova Health Care Services and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Walter M. O'Brien is one of 326 urologists in Virginia
Urology is Dr. O'Brien's primary specialty in the NPI Registry, under taxonomy code 208800000X. Dr. O'Brien is licensed in Virginia.
Specialties and state licenses
- Urology, VirginiaPrimary
Urologists near Dr. O'Brien
Counts of urologists 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. Walter M. O'Brien billed Medicare for 1,507 services in 2022
CMS data shows 1,507 Medicare services from Dr. O'Brien across 12 procedure codes in 2022. Medicare paid $65,027 for them.
Dr. O'Brien's Medicare services by type, 2021 to 2022
- 2021
- 2022
- Surgery
- 2021: 1,1572022: 61147%
- Office and hospital visits
- 2021: 7492022: 42244%
- Lab and pathology
- 2021: 7492022: 41045%
- Imaging
- 2021: 1052022: 6439%
Where Dr. O'Brien's Medicare services took place, 2022
- In an office1,40393%
- In a facility1047%
Dr. O'Brien compared with the Virginia median for urologists, 2022
- Dr. O'Brien
- Virginia median
- Medicare services
- 1,507vs 1,574Close to median
- Part D claims
- 191vs 61769% below
Medians across 313 urologists in Virginia with Dmand AI profiles that report each measure.
Dr. O'Brien's most billed Medicare procedure codes, 2022
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. O'Brien and other urologists in Virginia.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Walter M. O'Brien's patients have a median age of 72
Across all payers, Dmand AI patient panel data puts Dr. O'Brien's median patient age at 72, with 3% women.
Dr. O'Brien's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 72
Patient panel by sex, all payers
- Women3%
- Men93%
Source: Dmand AI Patient Panel Data
Dr. Walter M. O'Brien wrote 191 Medicare Part D claims in 2023
In 2023, Dr. O'Brien wrote 191 Medicare Part D claims. Every claim was for a generic drug. They cover 2 drugs, with $3,415 in total drug cost. In 2022, CMS named 1,091 claims across 12 drugs.
Dr. O'Brien's most prescribed drugs by claims, 2023
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, 2022 to 2023
- 2022
- 2023
- Claims for drugs CMS names
- 2022: 1,0912023: 19182%
Drugs named by CMS: 2 in 2023, 12 in 2022.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
Dr. Walter M. O'Brien scored 56 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 56 out of 100 for Dr. O'Brien for performance year 2024, reported as part of a group.
Dr. O'Brien's MIPS scores, performance year 2024
- 56of 100Final score
- 26of 100Quality
- 100of 100Promoting Interoperability
- 0of 100Improvement Activities
- 76of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Source: Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Walter M. O'Brien received $20,349 in industry payments from 2016 to 2023
CMS Open Payments shows 65 general payments to Dr. O'Brien from 17 drug and device companies from 2016 to 2023. Royalties and licenses make up the largest share, 93% of the total. Cook Medical LLC paid the most, $18,895.
General payments to Dr. O'Brien by program year, 2016 to 2023
General payments to Dr. O'Brien by kind, 2016 to 2023
- Royalties and licenses$18,89593%
- Food and beverage$1,4047%
- Education$500%
Companies that paid Dr. O'Brien the most, 2016 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Walter M. O'Brien graduated from Jefferson Medical College of Thomas Jefferson University
Dr. O'Brien graduated from Jefferson Medical College of Thomas Jefferson University in 1983.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Walter M. O'Brien'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) |
| MIPS scores, telehealth, assignment and procedure percentiles | Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| 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. Walter M. O'Brien
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. Walter M. O'Brien's NPI number?
Dr. Walter M. O'Brien's NPI number is 1730173360. It was assigned on September 9, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Walter M. O'Brien?
Dr. Walter M. O'Brien is a urologist in Alexandria, Virginia. The primary specialty in the NPI Registry is Urology Physician (taxonomy code 208800000X).
Where does Dr. Walter M. O'Brien practice?
Dr. O'Brien practices at 4320 Seminary Rd, Alexandria, VA 22304. Dr. O'Brien's primary practice is Inova Alexandria Hospital in Alexandria, Virginia, part of Inova Health Care Services. Dmand AI also links Dr. O'Brien to 1 group practice or clinic.
What is Dr. Walter M. O'Brien's office phone number?
The practice phone on file for Dr. O'Brien is (703) 504-3167.
What is Dr. Walter M. O'Brien's medical license number?
Dr. O'Brien holds Virginia license 0101038671.
Which hospitals is Dr. Walter M. O'Brien affiliated with?
Dr. O'Brien practices at Inova Alexandria Hospital in Alexandria, Virginia.
What medical group is Dr. Walter M. O'Brien part of?
Dr. O'Brien is linked to Loudoun Medical Group.
Does Dr. Walter M. O'Brien accept Medicare?
Yes. CMS data shows Dr. O'Brien billed Medicare for 1,507 services in 2022.
What is Dr. Walter M. O'Brien's MIPS score?
Dr. O'Brien's MIPS final score for performance year 2024 is 56 out of 100, reported as part of a group.
What services does Dr. Walter M. O'Brien bill to Medicare?
In 2022, Dr. O'Brien's most billed Medicare services were lab and pathology test (81002), surgery: urinary system (51798) and office visit, established patient (99214).
Show 4 more questionsShow fewer questions
Where did Dr. Walter M. O'Brien go to medical school?
Dr. O'Brien graduated from Jefferson Medical College of Thomas Jefferson University in 1983.
What drugs does Dr. Walter M. O'Brien prescribe most?
In 2023 Medicare Part D data, Dr. O'Brien's most prescribed drugs by claims were Tamsulosin HCl and Finasteride.
Has Dr. Walter M. O'Brien received payments from drug or device companies?
CMS Open Payments shows $20,349 in general payments to Dr. O'Brien from 17 companies from 2016 to 2023. The largest total came from Cook Medical LLC.
How long has Dr. Walter M. O'Brien been practicing?
Dr. O'Brien graduated from medical school in 1983, 43 years ago.
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