CHARLES COMSTOCK CHASE CAA
NPI 1417694381
Anesthesiologist Assistant in Portland, OR
About Charles Comstock Chase Caa NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
CHARLES COMSTOCK CHASE CAA (NPI 1417694381) is an individual anesthesiologist assistant in Portland, Oregon, licensed in Washington (AA70065105) and active in the NPI registry since May 2022. He is affiliated with Freeman Health System - Freeman West, maintains 2 additional practice locations, and is a graduate of University Of Missouri, Kansas City, School Of Medicine (2022).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 2
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
Charles Comstock Chase Caa 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 Charles Chase reassigns Medicare billing to 3 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
Joplin, MO 64804
- Reassigned Medicare billing, Missouri enrollment
- 427 clinicians in this Medicare group
Saint Louis, MO 63110
- Reassigned Medicare billing, Missouri enrollment
- 142 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 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Freeman Health System - Freeman West
Acute Care Hospitals · Joplin, MOLegacy Salmon Creek Medical Center
Acute Care Hospitals · Vancouver, WAOther 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 Charles Chase's NPI number?
The NPI number for Charles Chase is 1417694381. It was assigned to this individual provider in the NPPES registry on May 12, 2022.
Where is Charles Chase located?
Charles Chase practices at 707 SW Washington St Ste 700, Portland, OR 97205. The listed phone number is (503) 299-9906.
What is Charles Chase's specialty?
The primary specialty registered for this NPI is Anesthesiologist Assistant with taxonomy code 367H00000X.
Is Charles Chase enrolled in Medicare?
Yes. Charles Chase 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 Charles Chase's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Charles Chase reassigns Medicare benefits to 3 organizations: Oregon Anesthesiology Group PC (Portland, OR), Freeman-Oak Hill Health System (Joplin, MO) and Ssm Health Slu Hospital Anesthesia Physician Billing, LLC (Saint Louis, MO). 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 Charles Chase's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Charles Chase affiliated with any hospitals?
According to CMS data, Charles Chase is affiliated with Freeman Health System - Freeman West and Legacy Salmon Creek Medical Center.
When was this NPI record last updated?
The NPPES record for Charles Chase was last updated on September 10, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 59 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.
# Charles Comstock Chase, CAA · NPI 1417694381
Anesthesiologist Assistant physician in Portland, Oregon. Individual provider, active in the CMS NPPES registry since May 12, 2022.
## Identity
- **NPI:** 1417694381 (Entity type: Individual)
- **Enumerated:** May 12, 2022
- **Primary specialty:** Anesthesiologist Assistant · taxonomy 367H00000X
- **State license:** AA70065105 (Washington)
- **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
- **Bills Medicare through:** 3 organizations under Medicare reassignment (form CMS-855R): Oregon Anesthesiology Group PC (NPI 1477527786, Portland, OR); Freeman-Oak Hill Health System (NPI 1679517023, Joplin, MO); Ssm Health Slu Hospital Anesthesia Physician Billing, LLC (NPI 1407232804, Saint Louis, MO) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Missouri, Kansas City, School Of Medicine, class of 2022
## Record status
- **NPPES last updated:** September 10, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1417694381) · Data from the CMS NPPES public registry.