BOB ALLEN LY D.O.
NPI 1659781516
Internal Medicine - Endocrinology, Diabetes & Metabolism in Mount Vernon, WA
About Bob Allen Ly D.o. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
BOB ALLEN LY D.O. (NPI 1659781516) is an individual endocrinology, diabetes & metabolism provider in Mount Vernon, Washington, licensed in Washington (OP61288032) and active in the NPI registry since April 2014. He is enrolled in Medicare PECOS, is affiliated with Skagit Valley Hospital, and is a graduate of Arizona College Of Osteopathic Medicine Mid Western University (2014).
NPPES Registry Identity
Specialties & Licenses
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
Bob Allen Ly D.o. 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
2Medicare enrollment records show Bob Ly reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Mount Vernon, WA 98274
- Reassigned Medicare billing, Washington enrollment
- 463 clinicians in this Medicare group
Dallas, TX 75244
- Reassigned Medicare billing, Washington enrollment
- 317 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 5
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Skagit Valley Hospital
Acute Care Hospitals · Mount Vernon, WAIsland Hospital
Acute Care Hospitals · Anacortes, WACascade Valley Hospital
Acute Care Hospitals · Arlington, WAPeacehealth United General Medical Center
Critical Access Hospitals · Sedro Woolley, WAWhidbeyhealth Medical Center
Critical Access Hospitals · Coupeville, WAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 98274 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.
MOUNT VERNON, WA 98274
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 Bob Ly's NPI number?
The NPI number for Bob Ly is 1659781516. It was assigned to this individual provider in the NPPES registry on April 30, 2014.
Where is Bob Ly located?
Bob Ly practices at 1400 E Kincaid St, Mount Vernon, WA 98274. The listed phone number is (360) 814-6315.
What is Bob Ly's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Endocrinology, Diabetes & Metabolism, with taxonomy code 207RE0101X.
Is Bob Ly enrolled in Medicare?
Yes. Bob Ly 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 Bob Ly's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Bob Ly reassigns Medicare benefits to 2 organizations: Public Hospital Dist No 1 Skagit (Mount Vernon, WA) and Signify Health Medical Associates, PLLC (Dallas, TX). 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 Bob Ly's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Bob Ly accept?
Health plans from Premera Blue Cross Blue Shield of Alaska and Providence Health Plan list Bob Ly 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 Bob Ly affiliated with any hospitals?
According to CMS data, Bob Ly is affiliated with Skagit Valley Hospital, Island Hospital, Cascade Valley Hospital, Peacehealth United General Medical Center and Whidbeyhealth Medical Center.
When was this NPI record last updated?
The NPPES record for Bob Ly was last updated on August 2, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.
# Bob Allen Ly, D.O. · NPI 1659781516
Endocrinology, Diabetes & Metabolism physician in Mount Vernon, Washington. Individual provider, active in the CMS NPPES registry since April 30, 2014.
## Identity
- **NPI:** 1659781516 (Entity type: Individual)
- **Enumerated:** April 30, 2014
- **Primary specialty:** Internal Medicine - Endocrinology, Diabetes & Metabolism · taxonomy 207RE0101X
- **State license:** OP61288032 (Washington)
- **Sole proprietor:** No
## Practice location
- **Address:** 1400 E KINCAID ST, Mount Vernon, WA 98274-4127
- **Phone:** (360) 814-6315 · **Fax:** (360) 814-6261
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Public Hospital Dist No 1 Skagit (NPI 1023332749, Mount Vernon, WA); Signify Health Medical Associates, PLLC (NPI 1750845863, Dallas, TX) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Arizona College Of Osteopathic Medicine Mid Western University, class of 2014
## Record status
- **NPPES last updated:** August 2, 2022
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Source: [NPI Profile](https://npiprofile.com/npi/1659781516) · Data from the CMS NPPES public registry.