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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

MRS. ANASTASIA TERESCHUK-PHILLIPS
NPI 1720319940
Nurse Practitioner - Psychiatric/Mental Health in Sandusky, MI

Active since January 28, 2010PECOS EnrolledAccepts Medicare Assignment
425 W SANILAC RD, SANDUSKY, MI 48471(615) 509-2664 Get Directions Write a Review

NPPES record last updated: August 10, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Aug 10, 2026, Aug 13, 2024, Aug 1, 2024 and 1 more (4 updates tracked since 2018).

About Mrs. Anastasia Tereschuk-phillips NPPES

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

MRS. ANASTASIA TERESCHUK-PHILLIPS (NPI 1720319940) is an individual psychiatric/mental health provider in Sandusky, Michigan, licensed in Michigan (4704300715) and active in the NPI registry since January 2010. She is enrolled in Medicare PECOS, is affiliated with Upper Connecticut Valley Hospital, and maintains a secondary practice location in Berlin.

NPPES Registry Identity

NPI1720319940
Entity TypeIndividualFemale
Primary Taxonomy363LP0808X
Provider Legal NameMRS. ANASTASIA TERESCHUK-PHILLIPS
Location Address425 W SANILAC RDSandusky, MI 48471-1072
Mailing Address425 W Sanilac RdSandusky, MI 48471-1072 · (615) 509-2664
Phone(615) 509-2664
Sole ProprietorNo
Medical School CMSOtherGraduated 2009
Enumeration DateJanuary 28, 2010
Last NPPES UpdateAugust 10, 20264 updates tracked since enumeration
NPPES CertifiedAugust 10, 2026
✔ NPI 1720319940 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyNurse Practitioner · Psychiatric/Mental HealthPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363LP0808X
Licenses✔ Licensed in MI · 4704300715✔ Licensed in KY · 3014541✔ Licensed in NH · 087547-23✔ Licensed in ME · CNP191044✔ Licensed in FL · APRN11017928
Also ListedRegistered NurseTaxonomy 163W00000X · License 157417 (TN)
Also ListedNurse Practitioner · Acute CareTaxonomy 363LA2100X · License 087547-23 (NH), 14696 (TN)
425 W SANILAC RD, Sandusky, MI 48471
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Other Names 1

Professional Name (2)Mrs. Anastasia Mikel Tereschuk Msn Acnp-bc Pmhnp-bc

Secondary Practice Location 1

Location 159 Page Hill RdBerlin, NH 03570-3542 · Phone (603) 752-2300 · Fax (603) 752-6474

Other Identifiers 3

Medicaid3073139NH
Other1031505037TN · Medicare
Medicaid1518627TN

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Oscar Insurance Company, Providence Health Plan, UnitedHealthcare.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Mrs. Anastasia Tereschuk-phillips 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 ID5395875975
PECOS Enrollment IDI20260216001986
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.

Hospital Affiliations CMS Care Compare 2

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

Upper Connecticut Valley Hospital

Critical Access Hospitals · Colebrook, NH
OwnershipVoluntary non-profit - Private
CMS Certification Number301300
Location181 Corliss LaneColebrook, NH 03576 · Coos County
Emergency services

Androscoggin Valley Hospital

Critical Access Hospitals · Berlin, NH
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number301310
Location59 Page Hill RoadBerlin, NH 03570 · Coos County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 48471 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
$84.74 typical visit price
range $54.34 – $166.68
Typical copayment $21.18 (range $13.58 – $41.67)
Most-billed visit code 99203
Established Patient
$96.44 typical visit price
range $17.09 – $135.40
Typical copayment $24.11 (range $4.27 – $33.85)
Most-billed visit code 99214
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 Anastasia Tereschuk-phillips's NPI number?

The NPI number for Anastasia Tereschuk-phillips is 1720319940. It was assigned to this individual provider in the NPPES registry on January 28, 2010. The provider is also known as Mrs. Anastasia Mikel Tereschuk Msn Acnp-Bc Pmhnp-Bc.

Where is Anastasia Tereschuk-phillips located?

Anastasia Tereschuk-phillips practices at 425 W Sanilac Rd, Sandusky, MI 48471. The listed phone number is (615) 509-2664.

What is Anastasia Tereschuk-phillips's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Psychiatric/Mental Health, with taxonomy code 363LP0808X.

Is Anastasia Tereschuk-phillips enrolled in Medicare?

Yes. Anastasia Tereschuk-phillips 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.

What insurance does Anastasia Tereschuk-phillips accept?

Health plans from Oscar Insurance Company, Providence Health Plan and UnitedHealthcare list Anastasia Tereschuk-phillips 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 Anastasia Tereschuk-phillips affiliated with any hospitals?

According to CMS data, Anastasia Tereschuk-phillips is affiliated with Upper Connecticut Valley Hospital and Androscoggin Valley Hospital.

When was this NPI record last updated?

The NPPES record for Anastasia Tereschuk-phillips was last updated on August 10, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.