1. Home
  2. Directory
  3. Massachusetts
  4. Boston
  5. Internal Medicine
  6. NPI Profile

DR. BRETT BRUNNER WILLIAMS MD
NPI 1447426606
Internal Medicine - Infectious Disease in Boston, MA

Active since May 07, 2008PECOS EnrolledAccepts Medicare Assignment
1 DEACONESS RD, DEACONESS 306, BOSTON, MA 02215(419) 902-6222 Get Directions Write a Review

NPPES record last updated: May 4, 2021. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: May 4, 2021, Sep 28, 2020 (2 updates tracked since 2020).

About Dr. Brett Brunner Williams Md NPPES

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

DR. BRETT BRUNNER WILLIAMS MD (NPI 1447426606) is an individual infectious disease provider in Boston, Massachusetts, licensed in Illinois (036-127789) and active in the NPI registry since May 2008. He is enrolled in Medicare PECOS, is affiliated with Rush University Medical Center, and is a graduate of Toledo Medical College (2008).

NPPES Registry Identity

NPI1447426606
Entity TypeIndividualMale
Primary Taxonomy207RI0200X
Provider Legal NameDR. BRETT BRUNNER WILLIAMSCredential: MD
Location Address1 DEACONESS RD, DEACONESS 306Boston, MA 02215-5321
Mailing Address1 Deaconess Rd, Deaconess 306Boston, MA 02215-5321 · (419) 902-6222
Phone(419) 902-6222
Sole ProprietorYes
Medical School CMSToledo Medical CollegeGraduated 2008
Enumeration DateMay 7, 2008
Last NPPES UpdateMay 4, 20212 updates tracked since enumeration
NPPES CertifiedMay 4, 2021
✔ NPI 1447426606 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · Infectious DiseaseAllopathic & Osteopathic Physicians
Taxonomy Code207RI0200X
License✔ Licensed in IL · 036-127789
Definition
An internist who deals with infectious diseases of all types and in all organ systems. Conditions requiring selective use of antibiotics call for this special skill. This physician often diagnoses and treats AIDS patients and patients with fevers which have not been explained. Infectious disease specialists may also have expertise in preventive medicine and travel medicine.
Also ListedInternal MedicineTaxonomy 207R00000X · License 036.127789 (IL)
1 DEACONESS RD, Boston, MA 02215
Open in Google Maps ↗

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Home State Health, Ambetter Health, Ambetter Health of Delaware.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

Dr. Brett Brunner Williams 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 ID5991976235
PECOS Enrollment IDI20110919000485
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.

Areas of Expertise CMS Part B claims 5

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232
Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.
99 services58 patients
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222
Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.
44 services44 patients
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
25 services22 patients
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223
Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.
21 services20 patients
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
14 services13 patients

Hospital Affiliations CMS Care Compare 2

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

Rush University Medical Center

Acute Care Hospitals · Chicago, IL
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number140119
Location1653 West Congress ParkwayChicago, IL 60612 · Cook County
Emergency services Birthing friendly

John H Stroger Jr Hospital

Acute Care Hospitals · Chicago, IL
2/5 CMS rating
OwnershipGovernment - Local
CMS Certification Number140124
Location1901 W Harrison StChicago, IL 60612 · Cook County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 02215 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$144.11 typical visit price
range $63.72 – $189.86
Typical copayment $36.02 (range $15.93 – $47.46)
Most-billed visit code 99204
Established Patient
$111.18 typical visit price
range $21.07 – $155.29
Typical copayment $27.79 (range $5.26 – $38.82)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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.

ERIC ANDREW WONG M.D.
Emergency Medicine
1 DEACONESS RD, WEST CC2
BOSTON, MA 02215
Suffolk County (617) 754-2339
ALON DAGAN M.D.
Emergency Medicine
1 DEACONESS RD, WEST CLINICAL CENTER 2
BOSTON, MA 02215
Suffolk County (617) 754-2339
DAVID WILLIAM SCHOENFELD M.D.
Student in an Organized Health Care Education/Training Program
1 DEACONESS RD, W-CC2 DEPARTMENT OF EMERGENCY MEDICINE
BOSTON, MA 02215
Suffolk County (617) 754-2339
DR. BRETT A SYLVIA M.D.
Emergency Medicine
1 DEACONESS RD, DEPT OF EMERGENCY MEDICINE, WEST-CC2
BOSTON, MA 02215
Suffolk County (617) 754-2339
ELLA AVEDIKIAN LCSW
Social Worker (Clinical)
1 DEACONESS RD
BOSTON, MA 02215
Suffolk County (617) 667-7000
LESLIE BILELLO
Emergency Medicine
1 DEACONESS RD
BOSTON, MA 02215
Suffolk County (617) 667-7000
DR. CHRISTIE FRITZ MD
Emergency Medicine
1 DEACONESS RD, W-CC2
BOSTON, MA 02215
Suffolk County (617) 667-7000
KATHRYN RODRIGUEZ LUPEZ M.D.
Emergency Medicine
1 DEACONESS RD
BOSTON, MA 02215
Suffolk County (617) 667-7000

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 Brett Williams's NPI number?

The NPI number for Brett Williams is 1447426606. It was assigned to this individual provider in the NPPES registry on May 7, 2008.

Where is Brett Williams located?

Brett Williams practices at 1 Deaconess Rd Deaconess 306, Boston, MA 02215. The listed phone number is (419) 902-6222.

What is Brett Williams's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Infectious Disease, with taxonomy code 207RI0200X.

Is Brett Williams enrolled in Medicare?

Yes. Brett Williams 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 Brett Williams accept?

Health plans from Ambetter Health, Ambetter Health of Delaware and Ambetter from Home State Health list Brett Williams 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 Brett Williams affiliated with any hospitals?

According to CMS data, Brett Williams is affiliated with Rush University Medical Center and John H Stroger Jr Hospital.

When was this NPI record last updated?

The NPPES record for Brett Williams was last updated on May 4, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.