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DICKERMAN HOLLISTER MD
NPI 1063420669
Internal Medicine - Medical Oncology in Greenwich, CT

Active since August 03, 2006PECOS Enrolled
77 LAFAYETTE PL, GREENWICH, CT 06830(203) 863-3737(203) 863-3741 Get Directions Write a Review

NPPES record last updated: July 8, 2007. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Dickerman Hollister Md NPPES

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

DICKERMAN HOLLISTER MD (NPI 1063420669) is an individual medical oncology provider in Greenwich, Connecticut, licensed in Connecticut (022791) and active in the NPI registry since August 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1063420669
Entity TypeIndividualMale
Primary Taxonomy207RX0202X
Provider Legal NameDICKERMAN HOLLISTERCredential: MD
Location Address77 LAFAYETTE PLGreenwich, CT 06830-5426
Mailing Address77 Lafayette PlGreenwich, CT 06830-5426 · (203) 863-3737 · Fax (203) 863-3741
Phone(203) 863-3737
Fax(203) 863-3741
Sole ProprietorNo
Enumeration DateAugust 3, 2006
Last NPPES UpdateJuly 8, 2007
✔ NPI 1063420669 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Medical OncologyAllopathic & Osteopathic Physicians
Taxonomy Code207RX0202X
License✔ Licensed in CT · 022791
Definition
An internist who specializes in the diagnosis and treatment of all types of cancer and other benign and malignant tumors. This specialist decides on and administers therapy for these malignancies as well as consults with surgeons and radiotherapists on other treatments for cancer.
77 LAFAYETTE PL, Greenwich, CT 06830
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Other Identifiers 1

Medicare UPINC59736

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dickerman Hollister Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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 Reassignments

2

Medicare enrollment records show Dickerman Hollister reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Mill Hill Medical Consultants Inc
Same address
Surgical Oncology
77 LAFAYETTE PL, SUITE 302
Greenwich, CT 06830
  • Reassigned Medicare billing, Connecticut enrollment
  • Medicare enrollment name: Northeast Medical Group Inc
  • 1,824 clinicians in this Medicare group
NPI 1245249549 (203) 863-4250
Yale University
41 mi
Advanced Practice Midwife
100 CHURCH ST S STE 200, YALE SCHOOL OF NURSING
New Haven, CT 06519
  • Reassigned Medicare billing, Connecticut enrollment
  • 3,728 clinicians in this Medicare group
NPI 1124148887 (203) 737-5432

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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 06830 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
$183.10 typical visit price
range $60.82 – $183.10
Typical copayment $45.77 (range $15.20 – $45.77)
Most-billed visit code 99205
Established Patient
$106.68 typical visit price
range $19.76 – $149.26
Typical copayment $26.67 (range $4.94 – $37.31)
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 19

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. CHRISTINA A DELPIN MD
Surgery
77 LAFAYETTE PL
GREENWICH, CT 06830
Western Connecticut Planning Region (203) 869-1045
SUMA GUPTA APRN
Nurse Practitioner
77 LAFAYETTE PL
GREENWICH, CT 06830
Western Connecticut Planning Region (203) 863-3031
BEVERLY J DRUCKER MD
Internal Medicine (Medical Oncology)
77 LAFAYETTE PL
GREENWICH, CT 06830
Western Connecticut Planning Region (203) 863-3737
MARY BETH DOWNER P.A.
Physician Assistant
77 LAFAYETTE PL, RADIATION ONCOLOGY-2ND FLOOR
GREENWICH, CT 06830
Western Connecticut Planning Region (203) 863-3773
WILLIAM K OH M.D.
Internal Medicine (Medical Oncology)
77 LAFAYETTE PL
GREENWICH, CT 06830
Western Connecticut Planning Region (203) 863-3700
MILL HILL MEDICAL CONSULTANTS INC
Surgery (Surgical Oncology)
77 LAFAYETTE PL, SUITE 302
GREENWICH, CT 06830
Western Connecticut Planning Region (203) 863-4250
DR. BARBARA A WARD MD
Surgery (Surgical Oncology)
77 LAFAYETTE PL, SUITE 302
GREENWICH, CT 06830
Western Connecticut Planning Region (203) 863-4250
SURGICAL SPECIALISTS OF GREENWICH
Surgery
77 LAFAYETTE PL
GREENWICH, CT 06830
Western Connecticut Planning Region (203) 863-4300

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 Dickerman Hollister's NPI number?

The NPI number for Dickerman Hollister is 1063420669. It was assigned to this individual provider in the NPPES registry on August 3, 2006.

Where is Dickerman Hollister located?

Dickerman Hollister practices at 77 Lafayette Pl, Greenwich, CT 06830. The listed phone number is (203) 863-3737.

What is Dickerman Hollister's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Medical Oncology, with taxonomy code 207RX0202X.

Is Dickerman Hollister enrolled in Medicare?

Yes. Dickerman Hollister is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Dickerman Hollister's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Dickerman Hollister reassigns Medicare benefits to 2 organizations: Mill Hill Medical Consultants Inc (Greenwich, CT) and Yale University (New Haven, CT). Each 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 Dickerman Hollister's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Dickerman Hollister was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.