DR. MARY THERESA HARRIS DDS
NPI 1417471327
Dentist in Crystal Lake, IL

Active since August 01, 2017Opted out of Medicare · through Jul 20, 2027
1500 CARLEMONT DR, CRYSTAL LAKE, IL 60014(815) 477-2273 Get Directions Write a Review

NPPES record last updated: December 28, 2020. Verified against the NPPES registry weekly; last sync: September 27, 2026.

Record update history: Dec 28, 2020, Aug 1, 2017 (2 updates tracked since 2017).

About Dr. Mary Theresa Harris Dds NPPES

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

DR. MARY THERESA HARRIS DDS (NPI 1417471327) is an individual dentist in Crystal Lake, Illinois, licensed in Illinois (019031314) and active in the NPI registry since August 2017. She has opted out of Medicare through July 20, 2027 and remains eligible to order and refer.

NPPES Registry Identity

NPI1417471327
Entity TypeIndividualFemale
Primary Taxonomy122300000X
Provider Legal NameDR. MARY THERESA HARRISCredential: DDS
Location Address1500 CARLEMONT DRCrystal Lake, IL 60014-1833
Mailing Address101 S Hale StPalatine, IL 60067-6211
Sole ProprietorNo
Enumeration DateAugust 1, 2017
Last NPPES UpdateDecember 28, 20202 updates tracked since enumeration
NPPES CertifiedDecember 28, 2020
✔ NPI 1417471327 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyDentistDental Providers
Taxonomy Code122300000X
License✔ Licensed in IL · 019031314
Definition
A dentist is a person qualified by a doctorate in dental surgery (D.D.S.) or dental medicine (D.M.D.), licensed by the state to practice dentistry, and practicing within the scope of that license. There is no difference between the two degrees: dentists who have a DMD or DDS have the same education. Universities have the prerogative to determine what degree is awarded. Both degrees use the same curriculum requirements set by the American Dental Association's Commission on Dental Accreditation. Generally, three or more years of undergraduate education plus four years of dental school is required to graduate and become a general dentist. State licensing boards accept either degree as equivalent, and both degrees allow licensed individuals to practice the same scope of general dentistry. Additional post-graduate training is required to become a dental specialist.
1500 CARLEMONT DR, Crystal Lake, IL 60014

Accepted Insurance

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

ⓘ

Opted out of Medicare

Dr. Mary Theresa Harris Dds has filed a Medicare opt-out affidavit. Services are provided under private contract between the provider and the patient, and are not billed to or reimbursed by Medicare. The opt-out is on file from July 20, 2023 through July 20, 2027.

Opt-Out Effective DateJuly 20, 2023
Opt-Out In Effect ThroughJuly 20, 2027Opt-out affidavits renew automatically every two years unless cancelled
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency– Power Mobility DevicesAn opted-out provider can still order and refer for Medicare patients in the categories marked above, even though their own services are not covered.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60014 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
$85.71 typical visit price
range $54.80 – $168.44
Typical copayment $21.42 (range $13.70 – $42.11)
Most-billed visit code 99203
Established Patient
$68.64 typical visit price
range $17.16 – $136.56
Typical copayment $17.16 (range $4.29 – $34.14)
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 5

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

Dentist (Oral and Maxillofacial Surgery)
1500 CARLEMONT DR, SUITE #F
CRYSTAL LAKE, IL 60014
Dentist (General Practice)
1500 CARLEMONT DR, SUITE C
CRYSTAL LAKE, IL 60014
Dentist (Oral and Maxillofacial Surgery)
1500 CARLEMONT DR, SUITE #F
CRYSTAL LAKE, IL 60014
Chiropractor
1500 CARLEMONT DR, SUITE M
CRYSTAL LAKE, IL 60014
Chiropractor
1500 CARLEMONT DR, SUITE M
CRYSTAL LAKE, IL 60014

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 Mary Harris's NPI number?

The NPI number for Mary Harris is 1417471327. It was assigned to this individual provider in the NPPES registry on August 1, 2017.

Where is Mary Harris located?

Mary Harris practices at 1500 Carlemont Dr, Crystal Lake, IL 60014. The listed phone number is (815) 477-2273.

What is Mary Harris's specialty?

The primary specialty registered for this NPI is Dentist with taxonomy code 122300000X.

Is Mary Harris enrolled in Medicare?

No. Mary Harris has opted out of Medicare through July 20, 2027. Care is provided under private contracts, and Medicare does not pay for services furnished by providers who have opted out. The provider remains eligible to order and refer services for Medicare patients.

What insurance does Mary Harris accept?

Health plans from Blue Cross and Blue Shield of Montana, Blue Cross and Blue Shield of Oklahoma and Blue Cross and Blue Shield of Texas list Mary Harris 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 Mary Harris was last updated on December 28, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.