GREGORY ROBERT TRIMBLE M.D.
NPI 1306064498
Hospitalist in Falls Church, VA
About Gregory Robert Trimble M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
GREGORY ROBERT TRIMBLE M.D. (NPI 1306064498) is an individual hospitalist provider in Falls Church, Virginia, licensed in Virginia (0101243239) and active in the NPI registry since April 2007. He is enrolled in Medicare PECOS, is affiliated with Inova Fairfax Hospital, and is a graduate of Other (2003).
NPPES Registry Identity
Specialties & Licenses
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Gregory Robert Trimble M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignment
Medicare enrollment records show Gregory Trimble reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Falls Church, VA 22042
- Reassigned Medicare billing, District of Columbia and Virginia enrollments
- Also billed through NPI 1588717755 (Virginia)
- 2,618 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 3
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Inova Fairfax Hospital
Acute Care Hospitals · Falls Church, VAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 22042 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
FALLS CHURCH, VA 22042
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Gregory Trimble's NPI number?
The NPI number for Gregory Trimble is 1306064498. It was assigned to this individual provider in the NPPES registry on April 23, 2007.
Where is Gregory Trimble located?
Gregory Trimble practices at 3300 Gallows Rd, Falls Church, VA 22042. The listed phone number is (703) 776-3582.
What is Gregory Trimble's specialty?
The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.
Is Gregory Trimble enrolled in Medicare?
Yes. Gregory Trimble is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organization bills Medicare for Gregory Trimble's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Gregory Trimble reassigns Medicare benefits to Inova Health Care Services (Falls Church, VA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Gregory Trimble's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Gregory Trimble accept?
Health plans from Oscar Health list Gregory Trimble as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Gregory Trimble affiliated with any hospitals?
According to CMS data, Gregory Trimble is affiliated with Inova Fairfax Hospital.
When was this NPI record last updated?
The NPPES record for Gregory Trimble was last updated on February 1, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Gregory Robert Trimble, M.D. · NPI 1306064498
Hospitalist physician in Falls Church, Virginia. Individual provider, active in the CMS NPPES registry since April 23, 2007.
## Identity
- **NPI:** 1306064498 (Entity type: Individual)
- **Enumerated:** April 23, 2007
- **Primary specialty:** Hospitalist · taxonomy 208M00000X
- **State license:** 0101243239 (Virginia)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 3300 GALLOWS RD, Falls Church, VA 22042-3307
- **Phone:** (703) 776-3582
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Inova Health Care Services (NPI 1952320061, Falls Church, VA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2003
## Record status
- **NPPES last updated:** February 1, 2021
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Source: [NPI Profile](https://npiprofile.com/npi/1306064498) · Data from the CMS NPPES public registry.