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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 30 days.

THERESA MAYHARTLE DO
NPI 1679553952
Obstetrics & Gynecology in Dewitt, MI

Active since January 20, 2006Opted out of Medicare · through Oct 27, 2027
12805 ESCANABA DR, SUITE 2, DEWITT, MI 48820(517) 367-5520(517) 367-5521 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Theresa Mayhartle Do NPPES

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

THERESA MAYHARTLE DO (NPI 1679553952) is an individual obstetrics & gynecology provider in Dewitt, Michigan, licensed in Michigan (5101011364) and active in the NPI registry since January 2006. She has opted out of Medicare through October 27, 2027 and remains eligible to order and refer.

NPPES Registry Identity

NPI1679553952
Entity TypeIndividualFemale
Primary Taxonomy207V00000X
Provider Legal NameTHERESA MAYHARTLECredential: DO
Location Address12805 ESCANABA DR, SUITE 2Dewitt, MI 48820-8628
Mailing Address401 S Ballenger HwyFlint, MI 48532-3638 · (810) 342-1000 · Fax (810) 342-1590
Phone(517) 367-5520
Fax(517) 367-5521
Sole ProprietorNo
Enumeration DateJanuary 20, 2006
Last NPPES UpdateJuly 13, 2026
✔ NPI 1679553952 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyObstetrics & GynecologyAllopathic & Osteopathic Physicians
Taxonomy Code207V00000X
License✔ Licensed in MI · 5101011364
Definition
An obstetrician/gynecologist possesses special knowledge, skills and professional capability in the medical and surgical care of the female reproductive system and associated disorders. This physician serves as a consultant to other physicians and as a primary physician for women.
12805 ESCANABA DR, Dewitt, MI 48820
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Other Identifiers 7

Other252503MI · Health Advantage Network
Other01795MI · Aetna
Other0700186MI · Physicians Health Plan
Other252503MI · Mclaren Health Plan
Other1651913484MI · Blue Cross Blue Shield
Medicaid4154702MI
OtherG10710MI · Health Net Federal Servic

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Care Network of Michigan, Blue Cross Blue Shield of Michigan Mutual Insurance Company.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

Theresa Mayhartle Do 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 October 27, 2025 through October 27, 2027.

Opt-Out Effective DateOctober 27, 2025
Opt-Out In Effect ThroughOctober 27, 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 48820 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
$126.15 typical visit price
range $54.34 – $166.68
Typical copayment $31.53 (range $13.58 – $41.67)
Most-billed visit code 99204
Established Patient
$68.07 typical visit price
range $17.09 – $135.40
Typical copayment $17.01 (range $4.27 – $33.85)
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 4

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

UPENDRA SHAH MD
Obstetrics & Gynecology
12805 ESCANABA DR
DEWITT, MI 48820
Clinton County (517) 367-5520
JAY THOMAS HOFFMAN DO
Family Medicine
12805 ESCANABA DR, SUITE 1
DEWITT, MI 48820
Clinton County (517) 975-9700
MS. LINDA SUE BOWERS C.F.N.P.
Nurse Practitioner (Family)
12805 ESCANABA DR, SUITE 2
DEWITT, MI 48820
Clinton County (517) 975-9750
STACIE BRIGGS PA-C
Physician Assistant
12805 ESCANABA DR
DEWITT, MI 48820
Clinton County (517) 913-3930

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 Theresa Mayhartle's NPI number?

The NPI number for Theresa Mayhartle is 1679553952. It was assigned to this individual provider in the NPPES registry on January 20, 2006.

Where is Theresa Mayhartle located?

Theresa Mayhartle practices at 12805 Escanaba Dr Suite 2, Dewitt, MI 48820. The listed phone number is (517) 367-5520.

What is Theresa Mayhartle's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.

Is Theresa Mayhartle enrolled in Medicare?

No. Theresa Mayhartle has opted out of Medicare through October 27, 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 Theresa Mayhartle accept?

Health plans from Blue Care Network of Michigan and Blue Cross Blue Shield of Michigan Mutual Insurance Company list Theresa Mayhartle 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 Theresa Mayhartle was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 22 days 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.