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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

WILLIAM C KWASNY MD
NPI 1962452532
Anesthesiology in Appleton, WI

Active since May 12, 2006PECOS EnrolledAccepts Medicare Assignment
1506 S ONEIDA ST, APPLETON, WI 54915(920) 738-2000 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

About William C Kwasny Md NPPES

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

WILLIAM C KWASNY MD (NPI 1962452532) is an individual anesthesiology provider in Appleton, Wisconsin, licensed in Wisconsin (47809) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS, is affiliated with Thedacare Regional Med Ctr - Neenah, and is a graduate of Medical College Of Wisconsin (1999).

NPPES Registry Identity

NPI1962452532
Entity TypeIndividualMale
Primary Taxonomy207L00000X
Provider Legal NameWILLIAM C KWASNYCredential: MD
Location Address1506 S ONEIDA STAppleton, WI 54915-1305
Mailing Address3420 Jackson St, Suite EOshkosh, WI 54901-8144
Phone(920) 738-2000
Sole ProprietorNo
Medical School CMSMedical College Of WisconsinGraduated 1999
Enumeration DateMay 12, 2006
Last NPPES UpdateJuly 13, 2026
✔ NPI 1962452532 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAnesthesiologyAllopathic & Osteopathic Physicians
Taxonomy Code207L00000X
License✔ Licensed in WI · 47809
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.
1506 S ONEIDA ST, Appleton, WI 54915
Open in Google Maps ↗

Other Identifiers 1

Medicaid34643200WI

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include CareSource (Common Ground Healthcare).Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

William C Kwasny 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 ID2163310020
PECOS Enrollment IDI20050614000424
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.

Hospital Affiliations CMS Care Compare 2

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Thedacare Regional Med Ctr - Neenah

Acute Care Hospitals · Neenah, WI
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number520045
Location130 2nd StNeenah, WI 54956 · Winnebago County
Emergency services Birthing friendly

Thedacare Regional Medical Center - Appleton Inc

Acute Care Hospitals · Appleton, WI
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number520160
Location1818 N Meade StAppleton, WI 54911 · Outagamie 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.

FOX VALLEY NEONATOLOGY SC
Pediatrics (Neonatal-Perinatal Medicine)
1506 S ONEIDA ST
APPLETON, WI 54915
Calumet County (920) 738-2000
ANNA QUELLA RD, LD, MS
Dietitian, Registered
1506 S ONEIDA ST
APPLETON, WI 54915
Calumet County (920) 831-1602
ASCENSION NE WISCONSIN, INC
Skilled Nursing Facility
1506 S ONEIDA ST
APPLETON, WI 54915
Calumet County (920) 720-1464
KAYLA MARIE LETTERMAN DPT
Physical Therapist
1506 S ONEIDA ST
APPLETON, WI 54915
Calumet County (920) 738-2681
BESSANT A PARKER MD
Hospitalist
1506 S ONEIDA ST, HOSPITAL SERVICE DEPARTMENT
APPLETON, WI 54915
Calumet County (920) 738-2000
DR. JOSEPH DOMINIC CHABOT D.O.
Neurological Surgery
1506 S ONEIDA ST
APPLETON, WI 54915
Calumet County (920) 738-2000
PANKAJ JAIN
Pediatrics (Neonatal-Perinatal Medicine)
1506 S ONEIDA ST
APPLETON, WI 54915
Calumet County (920) 730-7670
SAMUEL A. SOUTHARD CRNA
Nurse Anesthetist, Certified Registered
1506 S ONEIDA ST
APPLETON, WI 54915
Calumet County (920) 738-2000

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 William Kwasny's NPI number?

The NPI number for William Kwasny is 1962452532. It was assigned to this individual provider in the NPPES registry on May 12, 2006.

Where is William Kwasny located?

William Kwasny practices at 1506 S Oneida St, Appleton, WI 54915. The listed phone number is (920) 738-2000.

What is William Kwasny's specialty?

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

Is William Kwasny enrolled in Medicare?

Yes. William Kwasny 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.

What insurance does William Kwasny accept?

Health plans from CareSource (Common Ground Healthcare) list William Kwasny 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 William Kwasny affiliated with any hospitals?

According to CMS data, William Kwasny is affiliated with Thedacare Regional Med Ctr - Neenah and Thedacare Regional Medical Center - Appleton Inc.

When was this NPI record last updated?

The NPPES record for William Kwasny was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 36 days 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.