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THOMAS C GREENOUGH M.D.
NPI 1184607665
Internal Medicine - Infectious Disease in Worcester, MA

Active since November 29, 2005PECOS EnrolledAccepts Medicare Assignment
97.02/100
CMS Quality Rating
55 LAKE AVE N, DEPARTMENT OF INFECTIOUS DISEASE, WORCESTER, MA 01655(774) 441-8230(508) 334-3428 Get Directions Write a Review

NPPES record last updated: January 15, 2026. Verified against the NPPES registry weekly; last sync: July 26, 2026.

Record update history: Jan 15, 2026, Apr 3, 2025, Mar 3, 2021 and 1 more (4 updates tracked since 2020).

About Thomas C Greenough M.d. NPPES

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

THOMAS C GREENOUGH M.D. (NPI 1184607665) is an individual infectious disease provider in Worcester, Massachusetts, licensed in Massachusetts (77419) and active in the NPI registry since November 2005. He is enrolled in Medicare PECOS, is affiliated with Umass Memorial Healthalliance Hospitals, and maintains a secondary practice location in Worcester.

NPPES Registry Identity

NPI1184607665
Entity TypeIndividualMale
Primary Taxonomy207RI0200X
Provider Legal NameTHOMAS C GREENOUGHCredential: M.D.
Location Address55 LAKE AVE N, DEPARTMENT OF INFECTIOUS DISEASEWorcester, MA 01655-0002
Mailing AddressPo Box 415348Boston, MA 02241-5348
Phone(774) 441-8230
Fax(508) 334-3428
Sole ProprietorNo
Medical School CMSUniversity Of Rochester School Of Medicine And DentistryGraduated 1987
Enumeration DateNovember 29, 2005
Last NPPES UpdateJanuary 15, 20264 updates tracked since enumeration
NPPES CertifiedJanuary 15, 2026
✔ NPI 1184607665 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Infectious DiseaseAllopathic & Osteopathic Physicians
Taxonomy Code207RI0200X
License✔ Licensed in MA · 77419
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.
55 LAKE AVE N, Worcester, MA 01655
Open in Google Maps ↗

Secondary Practice Location 1

Location 1119 Belmont StWorcester, MA 01605-2903 · Phone (508) 334-1720

Other Identifiers 1

Medicaid110052966AMA

Accepted Insurance

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

Thomas C Greenough 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 ID8224071121
PECOS Enrollment IDI20050602000040
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 6

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 50 minutes 99233
Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.
80 services50 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.
76 services44 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.
58 services57 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.
51 services31 patients
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.
19 services19 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.
18 services18 patients

Hospital Affiliations CMS Care Compare 3

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

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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 01655 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
$134.47 typical visit price
range $58.86 – $177.36
Typical copayment $33.61 (range $14.71 – $44.34)
Most-billed visit code 99204
Established Patient
$103.48 typical visit price
range $19.11 – $144.84
Typical copayment $25.87 (range $4.77 – $36.21)
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.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

97.02/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored through an Alternative Payment Model
Quality78.09
Promoting Interoperability100
Improvement Activities40

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.

HILLARY R. IRONS MD
Emergency Medicine
55 LAKE AVE N
WORCESTER, MA 01655
Worcester County (508) 421-1400
MS. EILEEN A. DUHAMEL NP
Nurse Practitioner
55 LAKE AVE N, DEPARTMENT OF RADIOLOGY
WORCESTER, MA 01655
Worcester County (508) 334-2710
EWA HRYNISZYN CRNA
Nurse Anesthetist, Certified Registered
55 LAKE AVE N, DEPARTMENT OF ANESTHESIOLOGY
WORCESTER, MA 01655
Worcester County (508) 334-3271
HELEN COPSEY PA-C
Physician Assistant
55 LAKE AVE N
WORCESTER, MA 01655
Worcester County (508) 334-8585
DR. ADEPEJU GBADEBO CHAMPION M.D.
Internal Medicine
55 LAKE AVE N
WORCESTER, MA 01655
Worcester County (508) 334-2731
SOWMYA KORAPATI
Internal Medicine (Hematology & Oncology)
55 LAKE AVE N
WORCESTER, MA 01655
Worcester County (508) 334-3550
LAYLA FAKHRZADEH M.D.
Anesthesiology
55 LAKE AVE N, ANESTHESIOLOGY
WORCESTER, MA 01655
Worcester County (508) 334-3271
YOONYIE CHO M.D.
Anesthesiology
55 LAKE AVE N
WORCESTER, MA 01655
Worcester County (508) 334-1000

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 Thomas Greenough's NPI number?

The NPI number for Thomas Greenough is 1184607665. It was assigned to this individual provider in the NPPES registry on November 29, 2005.

Where is Thomas Greenough located?

Thomas Greenough practices at 55 Lake Ave N Department Of Infectious Disease, Worcester, MA 01655. The listed phone number is (774) 441-8230.

What is Thomas Greenough's specialty?

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

Is Thomas Greenough enrolled in Medicare?

Yes. Thomas Greenough 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 Thomas Greenough accept?

Health plans from Anthem Blue Cross and Blue Shield list Thomas Greenough 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 Thomas Greenough affiliated with any hospitals?

According to CMS data, Thomas Greenough is affiliated with Umass Memorial Healthalliance Hospitals, Umass Memorial Health - Harrington Hospital and Umass Memorial Medical Center/University Campus.

When was this NPI record last updated?

The NPPES record for Thomas Greenough was last updated on January 15, 2026. NPI Profile syncs with the weekly NPPES data releases published by CMS.