DR. THEODORE E EISENSTAT M.D.
NPI 1619948536
Colon & Rectal Surgery in Edison, NJ

Q: What is Theodore Eisenstat's NPI number?

The NPI number for Theodore Eisenstat is 1619948536. It was assigned to this individual provider in the NPPES registry on January 30, 2006.

Q: What is Theodore Eisenstat's specialty?

The primary specialty registered for this NPI is Colon & Rectal Surgery with taxonomy code 208C00000X.

Active since January 30, 2006PECOS Enrolled

3900 PARK AVE, SUITE 101, EDISON, NJ 08820(732) 494-6640(732) 549-8204 Get Directions Write a Review

NPPES record last updated: April 11, 2024. Verified against the NPPES registry weekly; last sync: October 18, 2026.

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About Dr. Theodore E Eisenstat M.d. NPPES

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

DR. THEODORE E EISENSTAT M.D. (NPI 1619948536) is an individual colon & rectal surgery provider in Edison, New Jersey, licensed in New Jersey (25MA024994100) and active in the NPI registry since January 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1619948536

Entity TypeIndividualMale

Primary Taxonomy208C00000X

Provider Legal NameDR. THEODORE E EISENSTATCredential: M.D.

Location Address3900 PARK AVE, SUITE 101Edison, NJ 08820-3032

Mailing Address3900 Park Ave, Suite 101Edison, NJ 08820-3032 · (732) 494-6640 · Fax (732) 549-8204

Phone(732) 494-6640

Fax(732) 549-8204

Sole ProprietorYes

Enumeration DateJanuary 30, 2006

Last NPPES UpdateApril 11, 2024

NPPES CertifiedApril 11, 2024

✔ NPI 1619948536 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyColon & Rectal SurgeryAllopathic & Osteopathic Physicians

Taxonomy Code208C00000X

License✔ Licensed in NJ · 25MA024994100

Definition

A colon and rectal surgeon is trained to diagnose and treat various diseases of the intestinal tract, colon, rectum, anal canal and perianal area by medical and surgical means. This specialist also deals with other organs and tissues (such as the liver, urinary and female reproductive system) involved with primary intestinal disease.

Also ListedSurgeryTaxonomy 208600000X · License 25MA02494100 (NJ)

3900 PARK AVE, Edison, NJ 08820

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Other Identifiers 1

Medicaid1595008NJ

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter Health, Ambetter Health of Delaware, Oscar Health.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Theodore E Eisenstat M.d. 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

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

Rutgers Health-Rwj Neurosurgery Faculty

5.7 mi

Urology

195 LITTLE ALBANY ST
New Brunswick, NJ 08901

Reassigned Medicare billing, New Jersey enrollment
259 clinicians in this Medicare group

NPI 1710012604 (732) 235-2465

Rutgers Health-Rwj Neurosurgery Faculty

11 mi

Surgery

110 REHILL AVE
Somerville, NJ 08876

Reassigned Medicare billing, New Jersey enrollment
28 clinicians in this Medicare group

NPI 1548356926 (908) 685-2856

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 08820 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

$98.09 typical visit price

range $63.84 – $190.92

Typical copayment $24.52 (range $15.96 – $47.73)

Most-billed visit code 99203

Established Patient

$79.09 typical visit price

range $20.97 – $155.92

Typical copayment $19.77 (range $5.24 – $38.98)

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 12

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

ASSOCIATED COLON & RECTAL SURGEONS, P.A.

Specialist

3900 PARK AVE, SUITE 101
EDISON, NJ 08820

Middlesex County (732) 494-6640

BERNARD TERRY MD

Specialist

3900 PARK AVE, STE 107
EDISON, NJ 08820

Middlesex County (732) 548-6800

ROBERT M JAFFE MD

Nuclear Medicine

3900 PARK AVE, STE 107
EDISON, NJ 08820

Middlesex County (732) 546-6800

LING L LAM MD

Radiology (Neuroradiology)

3900 PARK AVE
EDISON, NJ 08820

Middlesex County (732) 548-6800

JONATHAN ISSEROW

Radiology (Diagnostic Radiology)

3900 PARK AVE, STE 107
EDISON, NJ 08820

Middlesex County (732) 548-6800

DR. JOSEPH R NOTARO M.D.

Colon & Rectal Surgery

3900 PARK AVE, SUITE 101
EDISON, NJ 08820

Middlesex County (732) 494-6640

GORDON E MELVILLE MD

Radiology (Diagnostic Radiology)

3900 PARK AVE, STE 107
EDISON, NJ 08820

Middlesex County (732) 548-6800

DR. GREGORY C OLIVER M.D.

Colon & Rectal Surgery

3900 PARK AVE, SUITE 101
EDISON, NJ 08820

Middlesex County (732) 494-6640

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 Theodore Eisenstat's NPI number?

The NPI number for Theodore Eisenstat is 1619948536. It was assigned to this individual provider in the NPPES registry on January 30, 2006.

Where is Theodore Eisenstat located?

Theodore Eisenstat practices at 3900 Park Ave Suite 101, Edison, NJ 08820. The listed phone number is (732) 494-6640.

What is Theodore Eisenstat's specialty?

The primary specialty registered for this NPI is Colon & Rectal Surgery with taxonomy code 208C00000X.

Is Theodore Eisenstat enrolled in Medicare?

Yes. Theodore Eisenstat is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Theodore Eisenstat's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Theodore Eisenstat reassigns Medicare benefits to 2 organizations: Rutgers Health-Rwj Neurosurgery Faculty (New Brunswick, NJ) and Rutgers Health-Rwj Neurosurgery Faculty (Somerville, NJ). 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 Theodore Eisenstat's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Theodore Eisenstat accept?

Health plans from Ambetter Health, Ambetter Health of Delaware and Oscar Health list Theodore Eisenstat 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.

When was this NPI record last updated?

The NPPES record for Theodore Eisenstat was last updated on April 11, 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.