DR. WALTER BRENNAN IGAWA-SILVA M.D.
NPI 1437593688
Internal Medicine in Honolulu, HI
About Dr. Walter Brennan Igawa-silva M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. WALTER BRENNAN IGAWA-SILVA M.D. (NPI 1437593688) is an individual internal medicine provider in Honolulu, Hawaii, licensed in Hawaii (MD-18785) and active in the NPI registry since April 2013. He is enrolled in Medicare PECOS, is affiliated with Straub Clinic And Hospital, and maintains 2 additional practice locations.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Locations 2
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. Walter Brennan Igawa-silva 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 Reassignment
Medicare enrollment records show Walter Igawa-silva reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Honolulu, HI 96813
- Reassigned Medicare billing, Hawaii enrollment
- 664 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 4
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.
Straub Clinic And Hospital
Acute Care Hospitals · Honolulu, HIPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 96819 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Referred Medical Equipment & Supplies CMS DME claims 2
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
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.
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 Walter Igawa-silva's NPI number?
The NPI number for Walter Igawa-silva is 1437593688. It was assigned to this individual provider in the NPPES registry on April 18, 2013.
Where is Walter Igawa-silva located?
Walter Igawa-silva practices at 459 Patterson Rd, Honolulu, HI 96819. The listed phone number is (808) 433-0360.
What is Walter Igawa-silva's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Walter Igawa-silva enrolled in Medicare?
Yes. Walter Igawa-silva 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 organization bills Medicare for Walter Igawa-silva's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Walter Igawa-silva reassigns Medicare benefits to Straub Clinic & Hospital (Honolulu, HI). The 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 Walter Igawa-silva's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Walter Igawa-silva accept?
Health plans from HMSA list Walter Igawa-silva 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 Walter Igawa-silva affiliated with any hospitals?
According to CMS data, Walter Igawa-silva is affiliated with Straub Clinic And Hospital.
When was this NPI record last updated?
The NPPES record for Walter Igawa-silva was last updated on July 27, 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. Walter Brennan Igawa-Silva, M.D. · NPI 1437593688
Internal Medicine physician in Honolulu, Hawaii. Individual provider, active in the CMS NPPES registry since April 18, 2013.
## Identity
- **NPI:** 1437593688 (Entity type: Individual)
- **Enumerated:** April 18, 2013
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** MD-18785 (Hawaii)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 459 PATTERSON RD, Honolulu, HI 96819
- **Phone:** (808) 433-0360 · **Fax:** (808) 433-0327
## 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:** Straub Clinic & Hospital (NPI 1457306508, Honolulu, HI), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Stanford University School Of Medicine, class of 2013
## Record status
- **NPPES last updated:** July 27, 2019
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Source: [NPI Profile](https://npiprofile.com/npi/1437593688) · Data from the CMS NPPES public registry.