CATHERINE M OBERHOLZER MD
NPI 1326052549
Anesthesiology in Honolulu, HI
About Catherine M Oberholzer Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
CATHERINE M OBERHOLZER MD (NPI 1326052549) is an individual anesthesiology provider in Honolulu, Hawaii, licensed in Hawaii (MD-15981) and active in the NPI registry since July 2006. She is enrolled in Medicare PECOS, is affiliated with Adventist Health Castle, and is a graduate of Jefferson Medical College Of Thomas Jefferson University (2003).
NPPES Registry Identity
Specialties & Licenses
Other Names 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
Catherine M Oberholzer 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 Reassignments
3Medicare enrollment records show Catherine Oberholzer reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Honolulu, HI 96813
- Reassigned Medicare billing, Hawaii enrollment
Kaneohe, HI 96744
- Reassigned Medicare billing, Hawaii enrollment
- 23 clinicians in this Medicare group
Lihue, HI 96766
- Reassigned Medicare billing, Hawaii enrollment
- 298 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 3
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.
Adventist Health Castle
Acute Care Hospitals · Kailua, HIKuakini Medical Center
Acute Care Hospitals · Honolulu, HIOther Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
HONOLULU, HI 96813
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 Catherine Oberholzer's NPI number?
The NPI number for Catherine Oberholzer is 1326052549. It was assigned to this individual provider in the NPPES registry on July 27, 2006. The provider is also known as Catherine M.W.Y. Marn MD.
Where is Catherine Oberholzer located?
Catherine Oberholzer practices at 1301 Punchbowl St, Honolulu, HI 96813. The listed phone number is (808) 971-1085.
What is Catherine Oberholzer's specialty?
The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.
Is Catherine Oberholzer enrolled in Medicare?
Yes. Catherine Oberholzer 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 Catherine Oberholzer's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Catherine Oberholzer reassigns Medicare benefits to 3 organizations: Catherine Oberholzer, MD Inc. (Honolulu, HI), Koolau Anesthesia Group, LLC (Kaneohe, HI) and Kauai Medical Clinic (Lihue, HI). 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 Catherine Oberholzer's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Catherine Oberholzer affiliated with any hospitals?
According to CMS data, Catherine Oberholzer is affiliated with Adventist Health Castle and Kuakini Medical Center.
When was this NPI record last updated?
The NPPES record for Catherine Oberholzer was last updated on January 9, 2012. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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.
# Catherine M Oberholzer, MD · NPI 1326052549
Anesthesiology physician in Honolulu, Hawaii. Individual provider, active in the CMS NPPES registry since July 27, 2006.
## Identity
- **NPI:** 1326052549 (Entity type: Individual)
- **Enumerated:** July 27, 2006
- **Primary specialty:** Anesthesiology · taxonomy 207L00000X
- **State license:** MD-15981 (Hawaii)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 1301 PUNCHBOWL ST, Honolulu, HI 96813-2402
- **Phone:** (808) 971-1085
## 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): Catherine Oberholzer, MD Inc. (NPI 1467796722, Honolulu, HI); Koolau Anesthesia Group, LLC (NPI 1265184352, Kaneohe, HI); Kauai Medical Clinic (NPI 1376596643, Lihue, HI) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Jefferson Medical College Of Thomas Jefferson University, class of 2003
## Record status
- **NPPES last updated:** January 9, 2012
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Source: [NPI Profile](https://npiprofile.com/npi/1326052549) · Data from the CMS NPPES public registry.