1. Home
  2. Directory
  3. Oregon
  4. Portland
  5. Anesthesiology
  6. NPI Profile
Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

OREGON OUTPATIENT ANESTHESIA ASSOCIATES LLC
NPI 1083499727
Anesthesiology in Portland, OR

Active since August 30, 2023
4409 SW CARL PL, PORTLAND, OR 97239(316) 685-2371 Get Directions Write a Review

NPPES record last updated: October 17, 2026. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Oct 17, 2026, Aug 30, 2023 (2 updates tracked since 2023).

About Oregon Outpatient Anesthesia Associates Llc NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

OREGON OUTPATIENT ANESTHESIA ASSOCIATES LLC (NPI 1083499727) is a healthcare organization registered as an anesthesiology in Portland, Oregon and active in the NPI registry since August 2023. The organization lists John Mccreary, Md, as its authorized official.

NPPES Registry Identity

NPI1083499727
Entity TypeOrganization
Primary Taxonomy207L00000X
Legal Business NameOREGON OUTPATIENT ANESTHESIA ASSOCIATES LLC
Location Address4409 SW CARL PLPortland, OR 97239-1518
Mailing Address4409 Sw Carl PlPortland, OR 97239-1518
Phone(316) 685-2371
Organization SubpartNo
Authorized OfficialJohn MccrearyMd · (971) 404-6824
Enumeration DateAugust 30, 2023
Last NPPES UpdateOctober 17, 20262 updates tracked since enumeration
NPPES CertifiedOctober 17, 2026
✔ NPI 1083499727 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAnesthesiologyAllopathic & Osteopathic Physicians
Taxonomy Code207L00000X
Definition
An anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an operation or an obstetric or diagnostic procedure. The anesthesiologist assesses the risk of the patient undergoing surgery and optimizes the patient's condition prior to, during and after surgery. In addition to these management responsibilities, the anesthesiologist provides medical management and consultation in pain management and critical care medicine. Anesthesiologists diagnose and treat acute, long-standing and cancer pain problems; diagnose and treat patients with critical illnesses or severe injuries; direct resuscitation in the care of patients with cardiac or respiratory emergencies, including the need for artificial ventilation; and supervise post-anesthesia recovery.
4409 SW CARL PL, Portland, OR 97239
Open in Google Maps ↗

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Oregon Outpatient Anesthesia Associates Llc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

2

Medicare enrollment records show 2 clinicians reassign Medicare billing to Oregon Outpatient Anesthesia Associates LLC, which bills Medicare for the services they deliver. Of these, 2 practice within 10 miles. They are listed nearest first.

Clinicians, nearest first (2)

Melissa Duan, MD
Anesthesiology
NPI 1528226230
707 SW WASHINGTON ST SUITE 700
Portland, OR 97205
(503) 299-9906
✔ PECOS✔ Accepts Medicare2.2 mi
John Mccreary, MD
Anesthesiology
NPI 1275556664
707 SW WASHINGTON ST STE 700
Portland, OR 97205
(503) 299-9906
✔ PECOS✔ Accepts Medicare2.2 mi

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

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 Oregon Outpatient Anesthesia Associates LLC's NPI number?

The NPI number for Oregon Outpatient Anesthesia Associates LLC is 1083499727. It was assigned to this organization in the NPPES registry on August 30, 2023.

Where is Oregon Outpatient Anesthesia Associates LLC located?

Oregon Outpatient Anesthesia Associates LLC is located at 4409 SW Carl Pl, Portland, OR 97239. The listed phone number is (316) 685-2371.

What is Oregon Outpatient Anesthesia Associates LLC's specialty?

The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.

Is Oregon Outpatient Anesthesia Associates LLC enrolled in Medicare?

Yes. Oregon Outpatient Anesthesia Associates LLC is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Oregon Outpatient Anesthesia Associates LLC?

According to the CMS Revalidation Reassignment List (October 2026 release), 2 clinicians, all in Anesthesiology, reassign their Medicare billing to Oregon Outpatient Anesthesia Associates LLC. A 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 the clinician's services. Of these, 2 practice within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Oregon Outpatient Anesthesia Associates LLC was last updated on October 17, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 22 days 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.