DR. NATHANIEL HOWARD GREENE M.D.
NPI 1477787018
Anesthesiology in Portland, OR
About Dr. Nathaniel Howard Greene M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. NATHANIEL HOWARD GREENE M.D. (NPI 1477787018) is an individual anesthesiology provider in Portland, Oregon, licensed in Oregon (MD190570) and active in the NPI registry since May 2009. He is enrolled in Medicare PECOS, is affiliated with Providence St Vincent Medical Center, and is a graduate of Duke University School Of Medicine (2009).
NPPES Registry Identity
Specialties & Licenses 2
Other Identifiers 1
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. Nathaniel Howard Greene 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
2Medicare enrollment records show Nathaniel Greene reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Portland, OR 97205
- Reassigned Medicare billing, Washington enrollment
- 180 clinicians in this Medicare group
Portland, OR 97213
- Reassigned Medicare billing, Oregon enrollment
- 419 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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Providence St Vincent Medical Center
Acute Care Hospitals · Portland, OROther Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Nathaniel Greene's NPI number?
The NPI number for Nathaniel Greene is 1477787018. It was assigned to this individual provider in the NPPES registry on May 12, 2009.
Where is Nathaniel Greene located?
Nathaniel Greene practices at 707 SW Washington St Ste 700, Portland, OR 97205. The listed phone number is (503) 299-9906.
What is Nathaniel Greene's specialty?
The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.
Is Nathaniel Greene enrolled in Medicare?
Yes. Nathaniel Greene 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 Nathaniel Greene's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Nathaniel Greene reassigns Medicare benefits to 2 organizations: Oregon Anesthesiology Group PC (Portland, OR) and Hospitalist Medicine Physicians Of Washington - Tcs (Portland, 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 Nathaniel Greene's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Nathaniel Greene affiliated with any hospitals?
According to CMS data, Nathaniel Greene is affiliated with Providence St Vincent Medical Center.
When was this NPI record last updated?
The NPPES record for Nathaniel Greene was last updated on August 2, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.
# Dr. Nathaniel Howard Greene, M.D. · NPI 1477787018
Anesthesiology physician in Portland, Oregon. Individual provider, active in the CMS NPPES registry since May 12, 2009.
## Identity
- **NPI:** 1477787018 (Entity type: Individual)
- **Enumerated:** May 12, 2009
- **Primary specialty:** Anesthesiology · taxonomy 207L00000X
- **State license:** MD190570 (Oregon)
- **Sole proprietor:** No
## Practice location
- **Address:** 707 SW WASHINGTON ST STE 700, Portland, OR 97205-3523
- **Phone:** (503) 299-9906 · **Fax:** (503) 225-9002
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Oregon Anesthesiology Group PC (NPI 1477527786, Portland, OR); Hospitalist Medicine Physicians Of Washington - Tcs (NPI 1649816380, Portland, OR) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Duke University School Of Medicine, class of 2009
## Record status
- **NPPES last updated:** August 2, 2019
- **Other identifiers:** Medicaid 500763144 (OR)
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Source: [NPI Profile](https://npiprofile.com/npi/1477787018) · Data from the CMS NPPES public registry.