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

DR. CASSANDRA SIMONICH MD, PHD
NPI 1508494329
Pediatrics - Pediatric Infectious Diseases in Seattle, WA

Active since March 28, 2020PECOS EnrolledAccepts Medicare Assignment
4800 SAND POINT WAY NE, SEATTLE, WA 98105(206) 987-2525 Get Directions Write a Review

NPPES record last updated: March 25, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Mar 25, 2026, Nov 28, 2022, Jun 24, 2020 and 1 more (4 updates tracked since 2020).

About Dr. Cassandra Simonich Md, Phd NPPES

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

DR. CASSANDRA SIMONICH MD, PHD (NPI 1508494329) is an individual pediatric infectious diseases provider in Seattle, Washington, licensed in Washington (MD61655335) and active in the NPI registry since March 2020. She is enrolled in Medicare PECOS and is a graduate of University Of Washington School Of Medicine (2020).

NPPES Registry Identity

NPI1508494329
Entity TypeIndividualFemale
Primary Taxonomy2080P0208X
Provider Legal NameDR. CASSANDRA SIMONICHCredential: MD, PHD
Location Address4800 SAND POINT WAY NESeattle, WA 98105-3901
Mailing Address4800 Sand Point Way Ne, M/s Ma.7.226Seattle, WA 98105 · (206) 987-2525
Phone(206) 987-2525
Sole ProprietorNo
Medical School CMSUniversity Of Washington School Of MedicineGraduated 2020
Enumeration DateMarch 28, 2020
Last NPPES UpdateMarch 25, 20264 updates tracked since enumeration
NPPES CertifiedMarch 25, 2026
✔ NPI 1508494329 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatrics · Pediatric Infectious DiseasesAllopathic & Osteopathic Physicians
Taxonomy Code2080P0208X
License✔ Licensed in WA · MD61655335
Definition
A pediatrician trained to care for children in the diagnosis, treatment and prevention of infectious diseases. This specialist can apply specific knowledge to affect a better outcome for pediatric infections with complicated courses, underlying diseases that predispose to unusual or severe infections, unclear diagnoses, uncommon diseases and complex or investigational treatments.
4800 SAND POINT WAY NE, Seattle, WA 98105
Open in Google Maps ↗

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

Dr. Cassandra Simonich Md, Phd 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 ID9335561893
PECOS Enrollment IDI20260601001681
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.

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.

NALINI MALARKKAN MD
Anesthesiology
4800 SAND POINT WAY NE
SEATTLE, WA 98105
King County (206) 987-2728
MS. LINDA E EBLEN MA
Speech-Language Pathologist
4800 SAND POINT WAY NE, MAIL STOP W-6839
SEATTLE, WA 98105
King County (206) 987-6164
DR. JAMES TOLIVER BENNETT JR. M.D., PH.D.
Medical Genetics (Clinical Molecular Genetics)
4800 SAND POINT WAY NE, GENETIC MEDICINE
SEATTLE, WA 98105
King County (206) 987-2056
DR. LESLIE ANN DERVAN MD
Pediatrics (Pediatric Critical Care Medicine)
4800 SAND POINT WAY NE, MB.10.620
SEATTLE, WA 98105
King County (206) 987-0293
DR. INDI TREHAN MD
Pediatrics (Pediatric Infectious Diseases)
4800 SAND POINT WAY NE
SEATTLE, WA 98105
King County (206) 987-2000
MS. JENNIFER PATANO CNP
Nurse Practitioner (Pediatrics)
4800 SAND POINT WAY NE, MS O.7.720
SEATTLE, WA 98105
King County (206) 987-8949
MRS. SUSAN L HOLTZCLAW ARNP
Nurse Practitioner (Family)
4800 SAND POINT WAY NE, MAILSTOP T-2108
SEATTLE, WA 98105
King County (206) 987-5691
SHENG ZHOU MD
Otolaryngology (Pediatric Otolaryngology)
4800 SAND POINT WAY NE
SEATTLE, WA 98105
King County (206) 987-2105

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 Cassandra Simonich's NPI number?

The NPI number for Cassandra Simonich is 1508494329. It was assigned to this individual provider in the NPPES registry on March 28, 2020.

Where is Cassandra Simonich located?

Cassandra Simonich practices at 4800 Sand Point Way NE, Seattle, WA 98105. The listed phone number is (206) 987-2525.

What is Cassandra Simonich's specialty?

The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Infectious Diseases, with taxonomy code 2080P0208X.

Is Cassandra Simonich enrolled in Medicare?

Yes. Cassandra Simonich 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.

When was this NPI record last updated?

The NPPES record for Cassandra Simonich was last updated on March 25, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.