DR. SIOBHAN HEIDI GRAY M.D.
NPI 1861506057
Internal Medicine in Clackamas, OR
About Dr. Siobhan Heidi Gray M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. SIOBHAN HEIDI GRAY M.D. (NPI 1861506057) is an individual internal medicine provider in Clackamas, Oregon, licensed in Oregon (MD21803) and active in the NPI registry since August 2006. She is enrolled in Medicare PECOS, is affiliated with Kaiser Sunnyside Medical Center, and maintains a secondary practice location in Estacada.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
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
Dr. Siobhan Heidi Gray 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 Reassignments
3Medicare enrollment records show Siobhan Gray reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Clackamas, OR 97015
- Reassigned Medicare billing, Oregon and Washington enrollments
- Also billed through NPI 1871848457 (Washington)
- 3,207 clinicians in this Medicare group
Portland, OR 97232
- Reassigned Medicare billing, Oregon enrollment
- 3 clinicians in this Medicare group
Sandy, OR 97055
- Reassigned Medicare billing, Oregon enrollment
- 28 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 2
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.
Kaiser Sunnyside Medical Center
Acute Care Hospitals · Clackamas, ORPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 97015 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.
CLACKAMAS, OR 97015
CLACKAMAS, OR 97015
CLACKAMAS, OR 97015
CLACKAMAS, OR 97015
CLACKAMAS, OR 97015
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 Siobhan Gray's NPI number?
The NPI number for Siobhan Gray is 1861506057. It was assigned to this individual provider in the NPPES registry on August 18, 2006.
Where is Siobhan Gray located?
Siobhan Gray practices at 10180 SE Sunnyside Rd, Clackamas, OR 97015. The listed phone number is (503) 652-2880.
What is Siobhan Gray's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Siobhan Gray enrolled in Medicare?
Yes. Siobhan Gray 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 organizations bill Medicare for Siobhan Gray's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Siobhan Gray reassigns Medicare benefits to 3 organizations: Kaiser Foundation Health Plan Of The Northwest (Clackamas, OR), Permanente Health Care Ventures, PC (Portland, OR) and Orchid Oakridge Clinic, PC (Sandy, OR). Each 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 Siobhan Gray's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Siobhan Gray accept?
Health plans from Kaiser Permanente and Providence Health Plan list Siobhan Gray 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 Siobhan Gray affiliated with any hospitals?
According to CMS data, Siobhan Gray is affiliated with Kaiser Sunnyside Medical Center.
When was this NPI record last updated?
The NPPES record for Siobhan Gray was last updated on April 23, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.
# Dr. Siobhan Heidi Gray, M.D. · NPI 1861506057
Internal Medicine physician in Clackamas, Oregon. Individual provider, active in the CMS NPPES registry since August 18, 2006.
## Identity
- **NPI:** 1861506057 (Entity type: Individual)
- **Enumerated:** August 18, 2006
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** MD21803 (Oregon)
- **Sole proprietor:** No
## Practice location
- **Address:** 10180 SE SUNNYSIDE RD, Clackamas, OR 97015-8970
- **Phone:** (503) 652-2880
## 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:** 3 organizations under Medicare reassignment (form CMS-855R): Kaiser Foundation Health Plan Of The Northwest (NPI 1174851505, Clackamas, OR); Permanente Health Care Ventures, PC (NPI 1851024954, Portland, OR); Orchid Oakridge Clinic, PC (NPI 1417098773, Sandy, OR) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Indiana University School Of Medicine, class of 1996
## Record status
- **NPPES last updated:** April 23, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1861506057) · Data from the CMS NPPES public registry.