DR. RONALD A STILLER MD
NPI 1154396109
Internal Medicine - Pulmonary Disease in Walla Walla, WA
About Dr. Ronald A Stiller Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. RONALD A STILLER MD (NPI 1154396109) is an individual pulmonary disease provider in Walla Walla, Washington, licensed in Washington (MD60720548) and active in the NPI registry since February 2006. He is enrolled in Medicare PECOS, is affiliated with Providence St Mary Medical Center, and maintains a secondary practice location in Pittsburgh.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Location 1
Other Identifiers 1
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. Ronald A Stiller 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
4Medicare enrollment records show Ronald Stiller reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Walla Walla, WA 99362
- Reassigned Medicare billing, Washington enrollment
- 276 clinicians in this Medicare group
Spokane, WA 99204
- Reassigned Medicare billing, Washington enrollment
- 46 clinicians in this Medicare group
Spokane, WA 99204
- Reassigned Medicare billing, Washington enrollment
- 915 clinicians in this Medicare group
Apple Valley, CA 92307
- Reassigned Medicare billing, California enrollment
- 914 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 5
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.
Providence St Mary Medical Center
Acute Care Hospitals · Walla Walla, WAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 99362 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Referred Medical Equipment & Supplies CMS DME claims 3
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.
WALLA WALLA, WA 99362
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 Ronald Stiller's NPI number?
The NPI number for Ronald Stiller is 1154396109. It was assigned to this individual provider in the NPPES registry on February 22, 2006.
Where is Ronald Stiller located?
Ronald Stiller practices at 401 W Poplar St, Walla Walla, WA 99362. The listed phone number is (095) 897-3320.
What is Ronald Stiller's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Pulmonary Disease, with taxonomy code 207RP1001X.
Is Ronald Stiller enrolled in Medicare?
Yes. Ronald Stiller 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 Ronald Stiller's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Ronald Stiller reassigns Medicare benefits to 4 organizations: Providence Health & Services - Washington (Walla Walla, WA), Sound Physicians Intensivists Of Washington PLLC (Spokane, WA), South Sound Inpatient Physicians PLLC (Spokane, WA) and Hospitalist Medicine Physicians Of California, Inc (Apple Valley, CA). 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 Ronald Stiller's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Ronald Stiller accept?
Health plans from Premera Blue Cross Blue Shield of Alaska and Providence Health Plan list Ronald Stiller 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 Ronald Stiller affiliated with any hospitals?
According to CMS data, Ronald Stiller is affiliated with Providence St Mary Medical Center.
When was this NPI record last updated?
The NPPES record for Ronald Stiller was last updated on May 31, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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. Ronald A Stiller, MD · NPI 1154396109
Pulmonary Disease physician in Walla Walla, Washington. Individual provider, active in the CMS NPPES registry since February 22, 2006.
## Identity
- **NPI:** 1154396109 (Entity type: Individual)
- **Enumerated:** February 22, 2006
- **Primary specialty:** Internal Medicine - Pulmonary Disease · taxonomy 207RP1001X
- **State license:** MD60720548 (Washington)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 401 W POPLAR ST, Walla Walla, WA 99362-2846
- **Phone:** (095) 897-3320
## 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:** 4 organizations under Medicare reassignment (form CMS-855R): Providence Health & Services - Washington (NPI 1306097126, Walla Walla, WA); Sound Physicians Intensivists Of Washington PLLC (NPI 1528582699, Spokane, WA); South Sound Inpatient Physicians PLLC (NPI 1275785107, Spokane, WA); Hospitalist Medicine Physicians Of California, Inc (NPI 1184663965, Apple Valley, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** George Washington University School Of Medicine, class of 1982
## Record status
- **NPPES last updated:** May 31, 2024
- **Other identifiers:** Medicaid 001118560 (PA)
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Source: [NPI Profile](https://npiprofile.com/npi/1154396109) · Data from the CMS NPPES public registry.