DR. WILLIAM JEFFREY BAKER (M.D.) – Hematology & Oncology Physician, NPI 1710923073

DR. WILLIAM JEFFREY BAKER (M.D.) is a healthcare provider. based in Hartford, Connecticut. specializing in Hematology & Oncology Physician. They hold the professional credentials M.D.. They hold a License No. 033608 (CT). The NPI Number for DR. WILLIAM JEFFREY BAKER (M.D.) is 1710923073

Main info

Male
42 Years Of Experience
Accepts Medicare Assignment
Name
DR. WILLIAM JEFFREY BAKER (M.D.)
NPI
1710923073
Phone
(860) 249-6291
Address
85 Retreat Ave
Enumeration Date
22 June 2006
Last Update Date
29 September 2022

Doctor Profile

Medical School Name
TUFTS UNIVERSITY SCHOOL OF MEDICINE
Secondary Phone
8606797503
Graduation Year
1984 (42 years ago)
PAC ID
6002990058
Group Practice PAC ID
3678472016
Professional Enrollment ID
I20101006000301

Contacts

Secure Messaging
wbaker35660@direct.med.uchc.edu
Data current as of
19 May 2026

Profile Insights

NPPES metrics only — not quality of care.

Methodology
Experience62
Completeness85
Years active:19State licenses:1Other namesUpdated within 12 months

Provider Addresses for DR. WILLIAM JEFFREY BAKER (M.D.)

  • 85 Retreat Ave

    Hartford, CT 061062555

    Phone: (860) 249-6291

    Fax: (860) 728-0151

    Type: Location

  • 85, Retreat Avenue, Hartford, Hartford County, Connecticut, 06106, United States

    HARTFORD, CT 061062555

    Phone: (860) 679-2100

    Fax: (860) 728-0151

    Type: Mailing

  • University of Connecticut Health Center, 263, Farmington Avenue, Farmington, Hartford County, Connecticut, 06030, United States

    UCONN MEDICAL GROUP

    FARMINGTON, CT 060300001

    Phone: (860) 679-2100

    Fax: (860) 679-4815

    Type: Location

NPPES updates history

No NPPES updates recorded for this provider.

Prescription Activity

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Open Payments (CMS)

No Open Payments data available for this provider.

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Medicare Enrollment & Revalidation

Source: CMS public data · Not endorsed by CMS ·

Educational use only—not medical, billing, or legal advice.

No Medicare enrollment or revalidation data available for this provider in our database.

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Medicare Utilization (FFS)

Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·

Educational use only—not medical, billing, or legal advice.

No Medicare fee-for-service utilization data available for this provider in our database.

Insurance plans in this area (ZIP 06106)

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Provider's Procedures

DR. WILLIAM JEFFREY BAKER (M.D.) performs procedures in Hematology & Oncology Physician. See the list of HCPCS codes below.
SpecialtyPractice State
HCPCS Code
Description
Service Count
Beneficiary Count
HEMATOLOGY/ONCOLOGYCT85610Blood test, clotting time8825
HEMATOLOGY/ONCOLOGYCT96367Infusion into a vein for therapy prevention or diagnosis additional sequential infusion up to 1 hour68291
HEMATOLOGY/ONCOLOGYCT96415Infusion of chemotherapy into a vein3314

Group practice members

Group practice members are other physicians who share the same Group Practice PAC ID with this doctor. When doctors form a group practice and register in PECOS as a single entity, they receive a shared identification number. This table lists all providers in the same group practice.
PAC ID: 3678472016View full group profile
NameSpecialtyState
N E U R O S U R G E R YNY
E N D O C R I N O L O G YVA
Orthopedic SurgeryCT
Orthopedic SurgeryCT
Endocrinology, Internal MedicineCT
Critical Care (Intensivists)CT
Hospitalist, Internal MedicineCT
Gynecological OncologyNY
Physician AssistantCT
Hand Surgery, Orthopedic SurgeryCT

Reviews

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Frequently asked questions

What is the registry number for DR. WILLIAM JEFFREY BAKER (M.D.)?
The registry entry for DR. WILLIAM JEFFREY BAKER (M.D.) shows NPI 1710923073.
Should I treat DR. WILLIAM JEFFREY BAKER (M.D.) as an active provider?
Patients and plans typically see DR. WILLIAM JEFFREY BAKER (M.D.) as active in the national extract.
Which specialty label fits DR. WILLIAM JEFFREY BAKER (M.D.)?
NPPES ties DR. WILLIAM JEFFREY BAKER (M.D.) to Hematology & Oncology Physician in the taxonomy section. Clinical services aligned with this taxonomy classification.
Which community is linked to DR. WILLIAM JEFFREY BAKER (M.D.)?
DR. WILLIAM JEFFREY BAKER (M.D.) shows a connection to Hartford, Connecticut in registry-derived data.
What is the difference between NPI and a medical license?
An NPI is a federal identifier; a medical license is issued by a state and governs where someone may practice.

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