DR. WILLIAM WARREN PHILLIPS M.D.
NPI 1609260793
Thoracic Surgery (Cardiothoracic Vascular Surgery) in Worcester, MA

Q: What is William Phillips's NPI number?

The NPI number for William Phillips is 1609260793. It was assigned to this individual provider in the NPPES registry on March 26, 2015.

Q: What is William Phillips's specialty?

The primary specialty registered for this NPI is Thoracic Surgery (Cardiothoracic Vascular Surgery) with taxonomy code 208G00000X.

Q: When was this NPI record last updated?

The NPPES record for William Phillips was last updated on July 2, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.

Active since March 26, 2015PECOS EnrolledAccepts Medicare Assignment

67 BELMONT ST, WORCESTER, MA 01605(508) 334-8996(508) 334-6296 Get Directions Write a Review

NPPES record last updated: July 2, 2024. Verified against the NPPES registry weekly; last sync: November 01, 2026.

On this page

About Dr. William Warren Phillips M.d. NPPES

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

DR. WILLIAM WARREN PHILLIPS M.D. (NPI 1609260793) is an individual thoracic surgery (cardiothoracic vascular surgery) provider in Worcester, Massachusetts, licensed in Massachusetts (275008) and active in the NPI registry since March 2015. He is enrolled in Medicare PECOS, is affiliated with Umass Memorial Healthalliance Hospitals, and maintains a secondary practice location in Oak Park.

NPPES Registry Identity

NPI1609260793

Entity TypeIndividualMale

Primary Taxonomy208G00000X

Provider Legal NameDR. WILLIAM WARREN PHILLIPSCredential: M.D.

Location Address67 BELMONT STWorcester, MA 01605-2657

Mailing AddressPo Box 415348Boston, MA 02241-5348

Phone(508) 334-8996

Fax(508) 334-6296

Sole ProprietorNo

Medical School CMSRush Medical College Of Rush UniversityGraduated 2015

Enumeration DateMarch 26, 2015

Last NPPES UpdateJuly 2, 2024

NPPES CertifiedJuly 2, 2024

✔ NPI 1609260793 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyThoracic Surgery (Cardiothoracic Vascular Surgery)Allopathic & Osteopathic Physicians

Taxonomy Code208G00000X

License✔ Licensed in MA · 275008

Definition

A thoracic surgeon provides the operative, perioperative and critical care of patients with pathologic conditions within the chest. Included is the surgical care of coronary artery disease, cancers of the lung, esophagus and chest wall, abnormalities of the trachea, abnormalities of the great vessels and heart valves, congenital anomalies, tumors of the mediastinum and diseases of the diaphragm. The management of the airway and injuries of the chest is within the scope of the specialty.

Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X

67 BELMONT ST, Worcester, MA 01605

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Secondary Practice Location 1

Location 1351 S Harvey Ave, Apartment 2Oak Park, IL 60302-3584 · Phone (708) 305-0292

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield, Taro Health.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

Dr. William Warren Phillips M.d. 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 ID648556548

PECOS Enrollment IDI20240712002936

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 Reassignment

Medicare enrollment records show William Phillips reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Umass Memorial Medical Group Inc

1.8 mi

Internal Medicine

55 LAKE AVE N
Worcester, MA 01655

Reassigned Medicare billing, Massachusetts enrollment
2,902 clinicians in this Medicare group

NPI 1760445373 (508) 334-1000

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims

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 straightforward or low level of medical decision making, per day, if using time, at least 25 minutes 99231

Follow-up hospital inpatient care is a daily service where a healthcare professional checks on your health progress during your hospital stay. Each session typically lasts 15 minutes, involving updates on your condition and adjustments to your treatment plan, if necessary.

64 services30 patients

Hospital Affiliations CMS Care Compare 5

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

Umass Memorial Healthalliance Hospitals

Acute Care Hospitals · Leominster, MA

2/5 CMS rating

OwnershipVoluntary non-profit - Other

CMS Certification Number220001

Location60 Hospital RoadLeominster, MA 01453 · Worcester County

Emergency services

Umass Memorial Health - Harrington Hospital

Acute Care Hospitals · Southbridge, MA

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number220019

Location100 South StreetSouthbridge, MA 01550 · Worcester County

Emergency services

Milford Regional Medical Center

Acute Care Hospitals · Milford, MA

4/5 CMS rating

OwnershipVoluntary non-profit - Other

CMS Certification Number220090

Location14 Prospect StreetMilford, MA 01757 · Worcester County

Emergency services Birthing friendly

Umass Memorial Medical Center/University Campus

Acute Care Hospitals · Worcester, MA

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number220163

Location55 Lake Avenue NorthWorcester, MA 01655 · Worcester County

Emergency services Birthing friendly

St Vincent Hospital

Acute Care Hospitals · Worcester, MA

2/5 CMS rating

OwnershipProprietary

CMS Certification Number220176

Location123 Summer StreetWorcester, MA 01608 · Worcester County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 01605 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

$177.36 typical visit price

range $58.86 – $177.36

Typical copayment $44.34 (range $14.71 – $44.34)

Most-billed visit code 99205

Established Patient

$73.22 typical visit price

range $19.11 – $144.84

Typical copayment $18.30 (range $4.77 – $36.21)

Most-billed visit code 99213

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.

KAITLYN OLDEWURTEL DO

Colon & Rectal Surgery

67 BELMONT ST
WORCESTER, MA 01605

Worcester County (508) 334-8195

MARK WEBSTER MAXFIELD M.D.

Thoracic Surgery (Cardiothoracic Vascular Surgery)

67 BELMONT ST
WORCESTER, MA 01605

Worcester County (508) 334-5826

MIRRET EL-HAGRASSY

Psychiatry & Neurology (Neurology)

67 BELMONT ST
WORCESTER, MA 01605

Worcester County (508) 334-6641

DR. GEOFFREY M GRAEBER M.D.

Thoracic Surgery (Cardiothoracic Vascular Surgery)

67 BELMONT ST, DIVISION OF THORACIC SURGERY
WORCESTER, MA 01605

Worcester County (508) 334-8996

DR. FRANCIS MICHAEL HUTTINGER MD

Psychiatry & Neurology (Neurology)

67 BELMONT ST
WORCESTER, MA 01605

Worcester County (508) 334-6641

MS. JANET A MCDADE NP

Nurse Practitioner

67 BELMONT ST
WORCESTER, MA 01605

Worcester County (508) 334-8195

MR. MIN SHICK AHN MD

Otolaryngology

67 BELMONT ST, STE 103
WORCESTER, MA 01605

Worcester County (508) 755-8623

DR. JOAN FRANCES PUGLIA M.D.

Psychiatry & Neurology (Neurology)

67 BELMONT ST, SUITE 301
WORCESTER, MA 01605

Worcester County (508) 334-6641

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 Phillips's NPI number?

The NPI number for William Phillips is 1609260793. It was assigned to this individual provider in the NPPES registry on March 26, 2015.

Where is William Phillips located?

William Phillips practices at 67 Belmont St, Worcester, MA 01605. The listed phone number is (508) 334-8996.

What is William Phillips's specialty?

The primary specialty registered for this NPI is Thoracic Surgery (Cardiothoracic Vascular Surgery) with taxonomy code 208G00000X.

Is William Phillips enrolled in Medicare?

Yes. William Phillips 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 organization bills Medicare for William Phillips's services?

According to the CMS Revalidation Reassignment List (October 2026 release), William Phillips reassigns Medicare benefits to Umass Memorial Medical Group Inc (Worcester, MA). The 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 William Phillips's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does William Phillips accept?

Health plans from Anthem Blue Cross and Blue Shield and Taro Health list William Phillips 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 Phillips affiliated with any hospitals?

According to CMS data, William Phillips is affiliated with Umass Memorial Healthalliance Hospitals, Umass Memorial Health - Harrington Hospital, Milford Regional Medical Center, Umass Memorial Medical Center/University Campus and St Vincent Hospital.

When was this NPI record last updated?

The NPPES record for William Phillips was last updated on July 2, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.