1. Home
  2. Directory
  3. Washington
  4. Seattle
  5. Anesthesiology
  6. NPI Profile

DR. CAIN WILLIAM STARK MD
NPI 1245817857
Anesthesiology in Seattle, WA

Active since March 28, 2021PECOS EnrolledAccepts Medicare Assignment
600 BROADWAY STE 270, SEATTLE, WA 98122(206) 625-0578 Get Directions Write a Review

NPPES record last updated: June 30, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jun 30, 2025, Jun 10, 2025, Mar 28, 2021 (3 updates tracked since 2021).

About Dr. Cain William Stark Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. CAIN WILLIAM STARK MD (NPI 1245817857) is an individual anesthesiology provider in Seattle, Washington, licensed in Washington (MD61678578) and active in the NPI registry since March 2021. He is enrolled in Medicare PECOS, is affiliated with Swedish Medical Center / Cherry Hill, and is a graduate of Medical College Of Wisconsin (2021).

NPPES Registry Identity

NPI1245817857
Entity TypeIndividualMale
Primary Taxonomy207L00000X
Provider Legal NameDR. CAIN WILLIAM STARKCredential: MD
Location Address600 BROADWAY STE 270Seattle, WA 98122-5392
Mailing AddressPo Box 840842Dallas, TX 75284-0842 · (206) 625-0578 · Fax (206) 625-9184
Phone(206) 625-0578
Sole ProprietorNo
Medical School CMSMedical College Of WisconsinGraduated 2021
Enumeration DateMarch 28, 2021
Last NPPES UpdateJune 30, 20253 updates tracked since enumeration
NPPES CertifiedJune 30, 2025
✔ NPI 1245817857 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAnesthesiologyAllopathic & Osteopathic Physicians
Taxonomy Code207L00000X
Licenses✔ Licensed in WA · MD61678578✔ Licensed in WA · 61678578
Definition
An anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an operation or an obstetric or diagnostic procedure. The anesthesiologist assesses the risk of the patient undergoing surgery and optimizes the patient's condition prior to, during and after surgery. In addition to these management responsibilities, the anesthesiologist provides medical management and consultation in pain management and critical care medicine. Anesthesiologists diagnose and treat acute, long-standing and cancer pain problems; diagnose and treat patients with critical illnesses or severe injuries; direct resuscitation in the care of patients with cardiac or respiratory emergencies, including the need for artificial ventilation; and supervise post-anesthesia recovery.
600 BROADWAY STE 270, Seattle, WA 98122
Open in Google Maps ↗

Other Names 1

Former Name (1)Cain William Johnson

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. Cain William Stark 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.

PECOS PAC ID7214335199
PECOS Enrollment IDI20250716002755
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Cain Stark reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Physicians Anesthesia Service PLLC
Same address
Anesthesiology
600 BROADWAY STE 270
Seattle, WA 98122
  • Reassigned Medicare billing, Washington enrollment
  • 233 clinicians in this Medicare group
NPI 1417962200 (206) 381-0269

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

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 / Cherry Hill

Acute Care Hospitals · Seattle, WA
3/5 CMS rating
OwnershipVoluntary non-profit - Church
CMS Certification Number500025
Location500 17th AvenueSeattle, WA 98122 · King County
Emergency services

Swedish Medical Center

Acute Care Hospitals · Seattle, WA
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number500027
Location747 BroadwaySeattle, WA 98122 · King County
Emergency services Birthing friendly

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.

LUCAS MICHAEL SMITH MD
Anesthesiology
600 BROADWAY STE 270
SEATTLE, WA 98122
King County (206) 625-0578
DAVID ROBERT ENG MD
Anesthesiology
600 BROADWAY STE 270
SEATTLE, WA 98122
King County (206) 625-0578
KRISTA DUBIN MD
Anesthesiology
600 BROADWAY STE 270
SEATTLE, WA 98122
King County (206) 625-0578
ASHLEA THOMAS CRNA
Nurse Anesthetist, Certified Registered
600 BROADWAY STE 270
SEATTLE, WA 98122
King County (206) 625-0578
KIM THANH HUYNH CRNA
Nurse Anesthetist, Certified Registered
600 BROADWAY STE 270
SEATTLE, WA 98122
King County (206) 625-0578
MARK MCDADE ABELLERA MD
Anesthesiology
600 BROADWAY STE 270
SEATTLE, WA 98122
King County (206) 625-0578
MIA MCKINSTRY MD
Anesthesiology
600 BROADWAY STE 270
SEATTLE, WA 98122
King County (206) 625-0578
WILLIAM M HARBOUR MD
Anesthesiology
600 BROADWAY STE 270
SEATTLE, WA 98122
King County (206) 625-0578

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 Cain Stark's NPI number?

The NPI number for Cain Stark is 1245817857. It was assigned to this individual provider in the NPPES registry on March 28, 2021. The provider is also known as Cain William Johnson.

Where is Cain Stark located?

Cain Stark practices at 600 Broadway Ste 270, Seattle, WA 98122. The listed phone number is (206) 625-0578.

What is Cain Stark's specialty?

The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.

Is Cain Stark enrolled in Medicare?

Yes. Cain Stark 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 Cain Stark's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Cain Stark reassigns Medicare benefits to Physicians Anesthesia Service PLLC (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 Cain Stark's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Cain Stark affiliated with any hospitals?

According to CMS data, Cain Stark is affiliated with Swedish Medical Center / Cherry Hill and Swedish Medical Center.

When was this NPI record last updated?

The NPPES record for Cain Stark was last updated on June 30, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 months 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.