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DR. WILLIAM JOSEPH MULLER MD, PHD
NPI 1790896041
Pediatrics - Pediatric Infectious Diseases in Chicago, IL

Active since August 31, 2006PECOS EnrolledAccepts Medicare Assignment
225 E CHICAGO AVE, BOX 20, CHICAGO, IL 60611(312) 227-4080(312) 227-9709 Get Directions Write a Review

NPPES record last updated: November 7, 2022. Verified against the NPPES registry weekly; last sync: August 30, 2026.

Record update history: Nov 7, 2022, Nov 8, 2016 (2 updates tracked since 2016).

About Dr. William Joseph Muller Md, Phd NPPES

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

DR. WILLIAM JOSEPH MULLER MD, PHD (NPI 1790896041) is an individual pediatric infectious diseases provider in Chicago, Illinois, licensed in Illinois (036119141) and active in the NPI registry since August 2006. He is enrolled in Medicare PECOS and is a graduate of Other (2001).

NPPES Registry Identity

NPI1790896041
Entity TypeIndividualMale
Primary Taxonomy2080P0208X
Provider Legal NameDR. WILLIAM JOSEPH MULLERCredential: MD, PHD
Location Address225 E CHICAGO AVE, BOX 20Chicago, IL 60611-2991
Mailing Address225 E Chicago Ave, Box 20Chicago, IL 60611-2991 · (312) 227-4080 · Fax (312) 227-9709
Phone(312) 227-4080
Fax(312) 227-9709
Sole ProprietorNo
Medical School CMSOtherGraduated 2001
Enumeration DateAugust 31, 2006
Last NPPES UpdateNovember 7, 20222 updates tracked since enumeration
NPPES CertifiedNovember 7, 2022
✔ NPI 1790896041 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 IL · 036119141
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.
225 E CHICAGO AVE, Chicago, IL 60611
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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. William Joseph Muller 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 ID5294886008
PECOS Enrollment IDI20090707000463
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.

BESSEY ELIZABETH JOSE GEEVARGHESE DO
Pediatrics
225 E CHICAGO AVE
CHICAGO, IL 60611
Cook County (630) 933-6631
CHRISTINA SOOJIN KIM M.D.
Pediatrics
225 E CHICAGO AVE
CHICAGO, IL 60611
Cook County (443) 928-7458
JESSICA LAUREN OFFENBACH APN
Nurse Practitioner (Pediatrics)
225 E CHICAGO AVE
CHICAGO, IL 60611
Cook County (312) 227-4000
MS. JENNY KO LEE APN
Nurse Practitioner (Neonatal)
225 E CHICAGO AVE
CHICAGO, IL 60611
Cook County (847) 962-6268
ERIN COHEN MD
Pediatrics (Hospice and Palliative Medicine)
225 E CHICAGO AVE
CHICAGO, IL 60611
Cook County (312) 227-4000
DR. JOSEPH HART COLLINS MD
Psychiatry & Neurology (Neurology with Special Qualifications in Child Neurology)
225 E CHICAGO AVE
CHICAGO, IL 60611
Cook County (312) 227-3550
ALEXIS LYN HARMON
Student in an Organized Health Care Education/Training Program
225 E CHICAGO AVE
CHICAGO, IL 60611
Cook County (312) 227-4000
SHANNON JULIA CONWAY MD
Student in an Organized Health Care Education/Training Program
225 E CHICAGO AVE
CHICAGO, IL 60611
Cook County (312) 227-4000

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 Muller's NPI number?

The NPI number for William Muller is 1790896041. It was assigned to this individual provider in the NPPES registry on August 31, 2006.

Where is William Muller located?

William Muller practices at 225 E Chicago Ave Box 20, Chicago, IL 60611. The listed phone number is (312) 227-4080.

What is William Muller's specialty?

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

Is William Muller enrolled in Medicare?

Yes. William Muller 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 William Muller was last updated on November 7, 2022. 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.