ZACHARY SINGER MD
NPI 1124524665
Anesthesiology in Seattle, WA
About Zachary Singer Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ZACHARY SINGER MD (NPI 1124524665) is an individual anesthesiology provider in Seattle, Washington, licensed in Washington (61241130) and active in the NPI registry since April 2018. He is enrolled in Medicare PECOS, is affiliated with Swedish Medical Center, and is a graduate of Other (2018).
NPPES Registry Identity
Specialties & Licenses 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
Zachary Singer 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 Reassignment
Medicare enrollment records show Zachary Singer reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Seattle, WA 98104
- Reassigned Medicare billing, Washington enrollment
- Medicare enrollment name: Physicians Anesthesia Service PLLC
- 233 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 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Swedish Medical Center
Acute Care Hospitals · Seattle, WASwedish Issaquah
Acute Care Hospitals · Issaquah, WAMedicare 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.
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 Zachary Singer's NPI number?
The NPI number for Zachary Singer is 1124524665. It was assigned to this individual provider in the NPPES registry on April 3, 2018.
Where is Zachary Singer located?
Zachary Singer practices at 4210 Fremont Ave N, Seattle, WA 98103. The listed phone number is (516) 458-1869.
What is Zachary Singer's specialty?
The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.
Is Zachary Singer enrolled in Medicare?
Yes. Zachary Singer 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 Zachary Singer's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Zachary Singer reassigns Medicare benefits to Proliance Surgeons, Inc., P.S. (Seattle, WA). 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 Zachary Singer's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Zachary Singer affiliated with any hospitals?
According to CMS data, Zachary Singer is affiliated with Swedish Medical Center and Swedish Issaquah.
When was this NPI record last updated?
The NPPES record for Zachary Singer was last updated on August 8, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.
# Zachary Singer, MD · NPI 1124524665
Anesthesiology physician in Seattle, Washington. Individual provider, active in the CMS NPPES registry since April 3, 2018.
## Identity
- **NPI:** 1124524665 (Entity type: Individual)
- **Enumerated:** April 3, 2018
- **Primary specialty:** Anesthesiology · taxonomy 207L00000X
- **State license:** 61241130 (Washington)
- **Sole proprietor:** No
## Practice location
- **Address:** 4210 FREMONT AVE N, Seattle, WA 98103-7222
- **Phone:** (516) 458-1869
## 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:** Proliance Surgeons, Inc., P.S. (NPI 1811936990, Seattle, WA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2018
## Record status
- **NPPES last updated:** August 8, 2023
---
Source: [NPI Profile](https://npiprofile.com/npi/1124524665) · Data from the CMS NPPES public registry.