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SEAN JAMES DIKDAN M.D., M.P.H.
NPI 1770017121
Internal Medicine - Cardiovascular Disease in Newark, DE

Active since April 12, 2017PECOS EnrolledAccepts Medicare Assignment
200 HYGEIA DR STE 1360, NEWARK, DE 19713(302) 623-1929(302) 368-7943 Get Directions Write a Review

NPPES record last updated: September 2, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Sep 2, 2025, Apr 12, 2017 (2 updates tracked since 2017).

About Sean James Dikdan M.d., M.p.h. NPPES

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

SEAN JAMES DIKDAN M.D., M.P.H. (NPI 1770017121) is an individual cardiovascular disease provider in Newark, Delaware, licensed in Delaware (C1-0028078) and active in the NPI registry since April 2017. He is enrolled in Medicare PECOS, is affiliated with Union Hospital Of Cecil County, and is a graduate of Other (2017).

NPPES Registry Identity

NPI1770017121
Entity TypeIndividualMale
Primary Taxonomy207RC0000X
Provider Legal NameSEAN JAMES DIKDANCredential: M.D., M.P.H.
Location Address200 HYGEIA DR STE 1360Newark, DE 19713-2049
Mailing Address200 Hygeia Dr Ste 1360Newark, DE 19713-2049 · (302) 623-1929 · Fax (302) 368-7943
Phone(302) 623-1929
Fax(302) 368-7943
Sole ProprietorYes
Medical School CMSOtherGraduated 2017
Enumeration DateApril 12, 2017
Last NPPES UpdateSeptember 2, 20252 updates tracked since enumeration
NPPES CertifiedSeptember 2, 2025
✔ NPI 1770017121 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · Cardiovascular DiseaseAllopathic & Osteopathic Physicians
Taxonomy Code207RC0000X
Licenses✔ Licensed in DE · C1-0028078✔ Licensed in MD · D0104523
Definition
An internist who specializes in diseases of the heart and blood vessels and manages complex cardiac conditions such as heart attacks and life-threatening, abnormal heartbeat rhythms.
Also ListedInternal MedicineTaxonomy 207R00000X · License C1-0028078 (DE), D0104523 (MD)
200 HYGEIA DR STE 1360, Newark, DE 19713
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include AmeriHealth Caritas Next, Highmark Blue Cross Blue Shield Delaware.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

Sean James Dikdan M.d., M.p.h. 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 ID5799053203
PECOS Enrollment IDI20250910003233
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 Sean Dikdan reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Christiana Care Health Services, Inc
Same address
Cardiovascular Disease
200 HYGEIA DR STE 1360
Newark, DE 19713
  • Reassigned Medicare billing, Delaware enrollment
  • 1,531 clinicians in this Medicare group
NPI 1003850504 (302) 623-1929
Union Hospital Of Cecil County, Inc.
10.0 mi
Urology
137 W HIGH ST STE 2B
Elkton, MD 21921
  • Reassigned Medicare billing, Maryland enrollment
  • 512 clinicians in this Medicare group
NPI 1407607450 (410) 398-0451

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

Hospital Affiliations CMS Care Compare

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

Union Hospital Of Cecil County

Acute Care Hospitals · Elkton, MD
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number210032
Location106 Bow StreetElkton, MD 21921 · Cecil County
Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 19713 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
$131.15 typical visit price
range $57.12 – $173.08
Typical copayment $32.78 (range $14.28 – $43.27)
Most-billed visit code 99204
Established Patient
$71.19 typical visit price
range $18.36 – $141.05
Typical copayment $17.79 (range $4.59 – $35.26)
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 11

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

CHRISTIANA CARE HEALTH SERVICES, INC
Internal Medicine (Cardiovascular Disease)
200 HYGEIA DR STE 1360
NEWARK, DE 19713
New Castle County (302) 623-1929
BRIANNA NICOLE DIX AGNP
Nurse Practitioner (Adult Health)
200 HYGEIA DR STE 1360
NEWARK, DE 19713
New Castle County (302) 623-1929
ISATA SESAY DO
Internal Medicine (Advanced Heart Failure and Transplant Cardiology)
200 HYGEIA DR STE 1360
NEWARK, DE 19713
New Castle County (302) 623-1929
DR. DAVID KIM MD
Internal Medicine (Cardiovascular Disease)
200 HYGEIA DR STE 1360
NEWARK, DE 19713
New Castle County (302) 623-1929
ANDREW LORD VINCENT
Nurse Practitioner (Acute Care)
200 HYGEIA DR STE 1360
NEWARK, DE 19713
New Castle County (302) 623-1929
NATHANIEL FREEMAN TANNER PA-C
Physician Assistant
200 HYGEIA DR STE 1360
NEWARK, DE 19713
New Castle County (302) 623-1929
SIJAN BASNET M.D.
Internal Medicine
200 HYGEIA DR STE 1360
NEWARK, DE 19713
New Castle County (302) 623-1929
REBECCA BROWN
Nurse Practitioner (Family)
200 HYGEIA DR STE 1360
NEWARK, DE 19713
New Castle County (302) 623-1929

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 Sean Dikdan's NPI number?

The NPI number for Sean Dikdan is 1770017121. It was assigned to this individual provider in the NPPES registry on April 12, 2017.

Where is Sean Dikdan located?

Sean Dikdan practices at 200 Hygeia Dr Ste 1360, Newark, DE 19713. The listed phone number is (302) 623-1929.

What is Sean Dikdan's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Cardiovascular Disease, with taxonomy code 207RC0000X.

Is Sean Dikdan enrolled in Medicare?

Yes. Sean Dikdan 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 organizations bill Medicare for Sean Dikdan's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Sean Dikdan reassigns Medicare benefits to 2 organizations: Christiana Care Health Services, Inc (Newark, DE) and Union Hospital Of Cecil County, Inc. (Elkton, MD). 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 Sean Dikdan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Sean Dikdan accept?

Health plans from AmeriHealth Caritas Next and Highmark Blue Cross Blue Shield Delaware list Sean Dikdan 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 Sean Dikdan affiliated with any hospitals?

According to CMS data, Sean Dikdan is affiliated with Union Hospital Of Cecil County.

When was this NPI record last updated?

The NPPES record for Sean Dikdan was last updated on September 2, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 months 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.