Dr. Gilbert Raymond Irwin, MD, PC
- Medicare services, 2017
- 265
- Part D claims, 2017
- 562
- Industry payments
- $17
- Affiliated sites
- 2
- Medical groups
- 2
- Practice address
- 10945 George Mason Cir Suite 105 Suite 105, Manassas, VA 20110-2233
- Practice phone
- Call (703) 361-5116
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Uva Health Internal Medicine Manassas
Multi-specialty group site · Manassas, Virginia
Find Dr. Irwin'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. Gilbert Raymond Irwin is an internist in Manassas, Virginia
Dr. Irwin practices at Uva Health Internal Medicine Manassas in Manassas, Virginia.
Dr. Irwin's NPI, 1588649990, was assigned on December 8, 2005. Dr. Irwin holds Virginia license 0101023931.
- NPI
- 1588649990NPI Registry (opens in a new tab)
- NPI enumeration date
- December 8, 2005
- NPI status
- Active
- Practice phone
- (703) 361-5116
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Gilbert Raymond Irwin practices at 2 locations in Manassas, Virginia
Dr. Irwin's primary practice is Uva Health Internal Medicine Manassas, at 10945 George Mason Cir Suite 105 Suite 105, Manassas, VA 20110-2233. The practice phone is (703) 361-5116. The NPI Registry lists Dr. Irwin's practice address as 9590 Surveyor Ct, Manassas, VA 20110-4406.
- Uva Health Internal Medicine ManassasPrimary10945 George Mason Cir Suite 105 Suite 105, Manassas, VA 20110-2233Phone(703) 361-5116
- NPI Registry address9590 Surveyor Ct, Manassas, VA 20110-4406Phone(703) 361-5116
Sources: NPPES NPI Registry (CMS); Dmand AI Affiliation Data; Doctors and Clinicians National Downloadable File (CMS); and Dmand AI Practice Data
Dr. Gilbert Raymond Irwin is affiliated with 2 sites of care and 2 medical groups
Dr. Irwin's primary practice is Uva Health Internal Medicine Manassas in Manassas, Virginia. The medical group on file is UVA Community Health Medical Group. Dmand AI also links Dr. Irwin to 1 more group practice or clinic and 1 medical group, each named with a free account.
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dmand AI tracks the EHR system at Dr. Gilbert Raymond Irwin's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Irwin practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Uva Health Internal Medicine Manassas | Available with a free account |
| +1 more site and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Gilbert Raymond Irwin is one of 3,339 internists in Virginia
Internal medicine is Dr. Irwin's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Irwin is licensed in Virginia.
Specialties and state licenses
- Internal medicine, VirginiaPrimary
Internists near Dr. Irwin
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. Gilbert Raymond Irwin billed Medicare for 265 services in 2017
CMS data shows 265 Medicare services from Dr. Irwin across 2 procedure codes in 2017, all of them office visits. Medicare paid $10,568 for them. Every service was in an office.
Dr. Irwin's Medicare services by type, 2016 to 2017
- 2016
- 2017
- Office and hospital visits
- 2016: 5672017: 26553%
- Lab and pathology
- 2016: 152017: 0100%
- Tests and treatments
- 2016: 542017: 0100%
- Other services
- 2016: 142017: 0100%
- Surgery
- 2016: 1262017: 0100%
Dr. Irwin compared with the Virginia median for internists, 2017
- Dr. Irwin
- Virginia median
- Medicare services
- 265vs 60756% below
- Part D claims
- 562vs 2242.5 times
Medians across 3,182 internists in Virginia with Dmand AI profiles that report each measure.
Dr. Irwin's most billed Medicare procedure codes, 2017
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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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Gilbert Raymond Irwin's patients have a median age of 68
Across all payers, Dmand AI patient panel data puts Dr. Irwin's median patient age at 68, with 60% women.
Dr. Irwin'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
- Women60%
- Men40%
Source: Dmand AI Patient Panel Data
Dr. Gilbert Raymond Irwin wrote 562 Medicare Part D claims in 2017
In 2017, Dr. Irwin wrote 562 Medicare Part D claims. They cover 23 drugs, with $13,036 in total drug cost. In 2016, CMS named 809 claims across 33 drugs.
Dr. Irwin's most prescribed drugs by claims, 2017
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, 2016 to 2017
- 2016
- 2017
- Claims for drugs CMS names
- 2016: 8092017: 56231%
Drugs named by CMS: 23 in 2017, 33 in 2016.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. Gilbert Raymond Irwin received $17 in industry payments in 2017
CMS Open Payments shows 1 general payment to Dr. Irwin from 1 drug or device company in 2017. Food and beverage make up the largest share, 100% of the total. Merck Sharp & Dohme Corporation paid the most, $17.
Companies that paid Dr. Irwin the most, 2017 to 2017
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Gilbert Raymond Irwin'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 Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| 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) |
| 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. Gilbert Raymond Irwin
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. Gilbert Raymond Irwin's NPI number?
Dr. Gilbert Raymond Irwin's NPI number is 1588649990. It was assigned on December 8, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Gilbert Raymond Irwin?
Dr. Gilbert Raymond Irwin is an internist in Manassas, Virginia. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Gilbert Raymond Irwin practice?
Dr. Irwin practices at 10945 George Mason Cir Suite 105 Suite 105, Manassas, VA 20110-2233. Dr. Irwin also practices at 9590 Surveyor Ct, Manassas, VA 20110-4406. Dr. Irwin's primary practice is Uva Health Internal Medicine Manassas in Manassas, Virginia. Dmand AI also links Dr. Irwin to 1 group practice or clinic and 1 medical group.
What is Dr. Gilbert Raymond Irwin's office phone number?
The practice phone on file for Dr. Irwin is (703) 361-5116.
What is Dr. Gilbert Raymond Irwin's medical license number?
Dr. Irwin holds Virginia license 0101023931.
What medical group is Dr. Gilbert Raymond Irwin part of?
Dr. Irwin is linked to UVA Community Health Medical Group. Dmand AI links Dr. Irwin to 1 more medical group.
Does Dr. Gilbert Raymond Irwin accept Medicare?
Yes. CMS data shows Dr. Irwin billed Medicare for 265 services in 2017.
What services does Dr. Gilbert Raymond Irwin bill to Medicare?
In 2017, Dr. Irwin's most billed Medicare services were office visit, established patient (99213) and office visit, established patient (99212).
What drugs does Dr. Gilbert Raymond Irwin prescribe most?
In 2017 Medicare Part D data, Dr. Irwin's most prescribed drugs by claims were Lorazepam, Levothyroxine Sodium and Atorvastatin Calcium.
Has Dr. Gilbert Raymond Irwin received payments from drug or device companies?
CMS Open Payments shows $17 in general payments to Dr. Irwin from 1 company from 2017 to 2017. The largest total came from Merck Sharp & Dohme Corporation.
How long has Dr. Gilbert Raymond Irwin been practicing?
Dr. Irwin's NPI was assigned in 2005.
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