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JOSEPH T FLYNN JR. MD
NPI 1164508438
Pediatrics - Pediatric Nephrology in Seattle, WA

Active since October 30, 2006PECOS EnrolledAccepts Medicare Assignment
4800 SAND POINT WAY NE, M/S A-7931, SEATTLE, WA 98105(206) 987-2524 Get Directions Write a Review

NPPES record last updated: February 13, 2012. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Joseph T Flynn Jr. Md NPPES

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

JOSEPH T FLYNN JR. MD (NPI 1164508438) is an individual pediatric nephrology provider in Seattle, Washington, licensed in Washington (47970) and active in the NPI registry since October 2006. He is enrolled in Medicare PECOS, is affiliated with Seattle Children's Hospital, and is a graduate of Other (1987).

NPPES Registry Identity

NPI1164508438
Entity TypeIndividualMale
Primary Taxonomy2080P0210X
Provider Legal NameJOSEPH T FLYNN JR.Credential: MD
Location Address4800 SAND POINT WAY NE, M/S A-7931Seattle, WA 98105-3901
Mailing Address926 Federal Ave ESeattle, WA 98102-4531 · (206) 987-2524 · Fax (206) 987-2636
Phone(206) 987-2524
Sole ProprietorNo
Medical School CMSOtherGraduated 1987
Enumeration DateOctober 30, 2006
Last NPPES UpdateFebruary 13, 2012
✔ NPI 1164508438 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatrics · Pediatric NephrologyAllopathic & Osteopathic Physicians
Taxonomy Code2080P0210X
License✔ Licensed in WA · 47970
Definition
A pediatrician who deals with the normal and abnormal development and maturation of the kidney and urinary tract, the mechanisms by which the kidney can be damaged, the evaluation and treatment of renal diseases, fluid and electrolyte abnormalities, hypertension and renal replacement therapy.
4800 SAND POINT WAY NE, Seattle, WA 98105
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross and Blue Shield of Montana, Mountain Health CO-OP, PacificSource Health Plans and more.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

Joseph T Flynn Jr. 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 ID7517067234
PECOS Enrollment IDI20070711000180
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 Reassignments

3

Medicare enrollment records show Joseph Flynn reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Seattle Children's Hospital
Same address
Specialist
4800 SAND POINT WAY NE
Seattle, WA 98105
  • Reassigned Medicare billing, Washington enrollment
  • Medicare enrollment name: Seattle Childrens Hospital
  • 912 clinicians in this Medicare group
NPI 1003319500 (206) 987-2000
Association Of Chmc And University Physicians
Same address
Trauma Surgery
4800 SAND POINT WAY NE
Seattle, WA 98105
  • Reassigned Medicare billing, Washington enrollment
  • Medicare enrollment name: The Association Of Chrmc And University Physicians
  • 1,443 clinicians in this Medicare group
NPI 1649497827 (206) 987-2000
Rchp Billings - Missoula LLC
391 mi
Specialist
2827 FORT MISSOULA RD
Missoula, MT 59804
  • Reassigned Medicare billing, Montana enrollment
  • 192 clinicians in this Medicare group
NPI 1376946913 (406) 327-4620

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

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

Seattle Children's Hospital

Childrens · Seattle, WA
OwnershipVoluntary non-profit - Private
CMS Certification Number503300
Location4800 Sand Point Way NE, PO Box C-5371Seattle, WA 98105 · King County
Emergency services

Referred Medical Equipment & Supplies CMS DME claims 4

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Tacrolimus, immediate release, oral, 1 mg J7507
Treatment-Treatment - Miscellaneous · category RX029N
5 suppliers36 claims1,906 services$0.30 avg. paid by Medicare
Prednisone, immediate release or delayed release, oral, 1 mg J7512
Treatment-Treatment - Miscellaneous · category RX029N
2 suppliers11 claims1,350 services$0.01 avg. paid by Medicare
Pharmacy supply fee for oral anti-cancer, oral anti-emetic or immunosuppressive drug(s); for the first prescription in a 30-day period Q0511
Treatment-Chemotherapy · category RH012N
5 suppliers14 claims14 services$16.20 avg. paid by Medicare
Pharmacy supply fee for oral anti-cancer, oral anti-emetic or immunosuppressive drug(s); for a subsequent prescription in a 30-day period Q0512
Treatment-Chemotherapy · category RH012N
4 suppliers44 claims53 services$12.15 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

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 Joseph Flynn's NPI number?

The NPI number for Joseph Flynn is 1164508438. It was assigned to this individual provider in the NPPES registry on October 30, 2006.

Where is Joseph Flynn located?

Joseph Flynn practices at 4800 Sand Point Way NE M/S A-7931, Seattle, WA 98105. The listed phone number is (206) 987-2524.

What is Joseph Flynn's specialty?

The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Nephrology, with taxonomy code 2080P0210X.

Is Joseph Flynn enrolled in Medicare?

Yes. Joseph Flynn 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 Joseph Flynn's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Joseph Flynn reassigns Medicare benefits to 3 organizations: Seattle Children's Hospital (Seattle, WA), Association Of Chmc And University Physicians (Seattle, WA) and Rchp Billings - Missoula LLC (Missoula, MT). 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 Joseph Flynn's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Joseph Flynn accept?

Health plans from Blue Cross and Blue Shield of Montana, Mountain Health CO-OP, PacificSource Health Plans, Premera Blue Cross Blue Shield of Alaska and Providence Health Plan list Joseph Flynn 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 Joseph Flynn affiliated with any hospitals?

According to CMS data, Joseph Flynn is affiliated with Seattle Children's Hospital.

When was this NPI record last updated?

The NPPES record for Joseph Flynn was last updated on February 13, 2012. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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.