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DR. VASSOS B. HAJIHARIS DDS, MD
NPI 1891916003
Dentist - Oral and Maxillofacial Surgery in Oaklawn, IL

Active since May 02, 2007PECOS Enrolled
4435 W 95TH STREET, OAKLAWN, IL 60453(313) 499-4775(708) 423-8552 Get Directions Write a Review

NPPES record last updated: November 18, 2011. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Dr. Vassos B. Hajiharis Dds, Md NPPES

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

DR. VASSOS B. HAJIHARIS DDS, MD (NPI 1891916003) is an individual oral and maxillofacial surgery provider in Oaklawn, Illinois, licensed in Illinois (019013377) and active in the NPI registry since May 2007. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1891916003
Entity TypeIndividualMale
Primary Taxonomy1223S0112X
Provider Legal NameDR. VASSOS B. HAJIHARISCredential: DDS, MD
Location Address4435 W 95TH STREETOaklawn, IL 60453
Mailing Address7625 W 15th StreetTinley Park, FL 60477 · (708) 429-4770 · Fax (708) 429-9685
Phone(313) 499-4775
Fax(708) 423-8552
Sole ProprietorYes
Enumeration DateMay 2, 2007
Last NPPES UpdateNovember 18, 2011
✔ NPI 1891916003 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyDentist · Oral and Maxillofacial SurgeryDental Providers
Taxonomy Code1223S0112X
Licenses✔ Licensed in IL · 019013377✔ Licensed in MI · 2901018486✔ Licensed in MI · 4301086539
Definition
An oral and maxillofacial surgery dentist specialized in the diagnosis, surgical and adjunctive treatment of diseases, injuries and defects involving both the functional and esthetic aspects of the hard and soft tissues of the oral and maxillofacial region.
4435 W 95TH STREET, Oaklawn, IL 60453
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield, Blue Cross and Blue Shield of Montana, Blue Cross and Blue Shield of Oklahoma and more.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. Vassos B. Hajiharis Dds, 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 Reassignment

Medicare enrollment records show Vassos Hajiharis reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Midland Oral Surgery And Implant Centers, Ltd
Same address
Oral and Maxillofacial Surgery
4435 W. 95TH STREET
Oak Lawn, IL 60453
  • Reassigned Medicare billing, Illinois enrollment
  • 2 clinicians in this Medicare group
NPI 1669480851 (708) 423-5990

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

Areas of Expertise CMS Part B claims

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.

New patient office or other outpatient visit with straightforward medical decision making, if using time, 15 minutes or more 99202
This service involves an initial visit to the doctor's office or other outpatient setting. It typically lasts between 15-29 minutes. The doctor will review your medical history, conduct a physical examination, and discuss your health concerns. It's a chance to establish your health baseline and address any immediate medical issues.
16 services16 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60453 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
$94.06 typical visit price
range $60.08 – $183.39
Typical copayment $23.51 (range $15.02 – $45.84)
Most-billed visit code 99203
Established Patient
$74.80 typical visit price
range $18.97 – $148.12
Typical copayment $18.70 (range $4.74 – $37.03)
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.

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 Vassos Hajiharis's NPI number?

The NPI number for Vassos Hajiharis is 1891916003. It was assigned to this individual provider in the NPPES registry on May 2, 2007.

Where is Vassos Hajiharis located?

Vassos Hajiharis practices at 4435 W 95th Street, Oaklawn, IL 60453. The listed phone number is (313) 499-4775.

What is Vassos Hajiharis's specialty?

The primary specialty registered for this NPI is Dentist, specializing in Oral and Maxillofacial Surgery, with taxonomy code 1223S0112X.

Is Vassos Hajiharis enrolled in Medicare?

Yes. Vassos Hajiharis is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Vassos Hajiharis's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Vassos Hajiharis reassigns Medicare benefits to Midland Oral Surgery And Implant Centers, Ltd (Oak Lawn, IL). The 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 Vassos Hajiharis's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Vassos Hajiharis accept?

Health plans from Anthem Blue Cross and Blue Shield, Blue Cross and Blue Shield of Montana, Blue Cross and Blue Shield of Oklahoma, Blue Cross and Blue Shield of Texas and Humana and 1 other insurer list Vassos Hajiharis 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 Vassos Hajiharis was last updated on November 18, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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.