GRANT MARQUART MD
NPI 1730728361
Family Medicine in Portland, OR
About Grant Marquart Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
GRANT MARQUART MD (NPI 1730728361) is an individual family medicine provider in Portland, Oregon, licensed in Oregon (MD224178) and active in the NPI registry since December 2019. He is enrolled in Medicare PECOS and is a graduate of Oregon Health Sciences University School Of Medicine (2021).
NPPES Registry Identity
Specialties & Licenses
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
Grant Marquart Md 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 Grant Marquart reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Gresham, OR 97030
- Reassigned Medicare billing, Oregon and Washington enrollments
- Medicare enrollment name: Kaiser Foundation Health Plan Of The Northwest
- Also billed through NPI 1871848457 (Washington)
- 3,207 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 97233 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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.
PORTLAND, OR 97233
PORTLAND, OR 97233
PORTLAND, OR 97233
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 Grant Marquart's NPI number?
The NPI number for Grant Marquart is 1730728361. It was assigned to this individual provider in the NPPES registry on December 30, 2019.
Where is Grant Marquart located?
Grant Marquart practices at 19500 SE Stark St, Portland, OR 97233. The listed phone number is (800) 813-2000.
What is Grant Marquart's specialty?
The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.
Is Grant Marquart enrolled in Medicare?
Yes. Grant Marquart 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 Grant Marquart's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Grant Marquart reassigns Medicare benefits to Sapphire At Gresham Rehab, LLC (Gresham, OR). 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 Grant Marquart's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Grant Marquart was last updated on August 29, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 months 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.
# Grant Marquart, MD · NPI 1730728361
Family Medicine physician in Portland, Oregon. Individual provider, active in the CMS NPPES registry since December 30, 2019.
## Identity
- **NPI:** 1730728361 (Entity type: Individual)
- **Enumerated:** December 30, 2019
- **Primary specialty:** Family Medicine · taxonomy 207Q00000X
- **State license:** MD224178 (Oregon)
- **Sole proprietor:** No
## Practice location
- **Address:** 19500 SE STARK ST, Portland, OR 97233-5757
- **Phone:** (800) 813-2000
## 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:** Sapphire At Gresham Rehab, LLC (NPI 1033740899, Gresham, OR), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Oregon Health Sciences University School Of Medicine, class of 2021
## Record status
- **NPPES last updated:** August 29, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1730728361) · Data from the CMS NPPES public registry.