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CORTNEY ESSAK MD
NPI 1437778446
Internal Medicine - Hematology & Oncology in Livonia, MI

Active since April 09, 2020PECOS Enrolled
14555 LEVAN RD, LIVONIA, MI 48154(734) 655-4800 Get Directions Write a Review

NPPES record last updated: August 27, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Aug 27, 2026, Jul 6, 2026, Apr 9, 2020 (3 updates tracked since 2020).

About Cortney Essak Md NPPES

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

CORTNEY ESSAK MD (NPI 1437778446) is an individual hematology & oncology provider in Livonia, Michigan, licensed in Michigan (4301518446) and active in the NPI registry since April 2020. She is enrolled in Medicare PECOS and is a graduate of Other (2026).

NPPES Registry Identity

NPI1437778446
Entity TypeIndividualFemale
Primary Taxonomy207RH0003X
Provider Legal NameCORTNEY ESSAKCredential: MD
Location Address14555 LEVAN RDLivonia, MI 48154-5083
Mailing Address24 Frank Lloyd Wright Dr Ste J2000Ann Arbor, MI 48105-9484
Phone(734) 655-4800
Sole ProprietorNo
Medical School CMSOtherGraduated 2026
Enumeration DateApril 9, 2020
Last NPPES UpdateAugust 27, 20263 updates tracked since enumeration
NPPES CertifiedAugust 27, 2026
✔ NPI 1437778446 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Hematology & OncologyAllopathic & Osteopathic Physicians
Taxonomy Code207RH0003X
License✔ Licensed in MI · 4301518446
Definition
An internist doctor of osteopathy that specializes in the treatment of the combination of hematology and oncology disorders. A doctor of osteopathy that is board eligible/certified by the American Osteopathic Board of Internal Medicine WAS able to obtain a Certificate of Special Qualifications in the field of Hematology and Oncology. The Certificate is NO longer offered.
14555 LEVAN RD, Livonia, MI 48154
Open in Google Maps ↗

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Buckeye Health Plan, Ambetter from Meridian, Ambetter Health 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)

Cortney Essak Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID2264851252
PECOS Enrollment IDI20260721004046
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 Cortney Essak reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Iha Health Services Corporation
3.9 mi
Pediatrics
990 W ANN ARBOR TRL, SUITE 210
Plymouth, MI 48170
  • Reassigned Medicare billing, Michigan enrollment
  • 1,480 clinicians in this Medicare group
NPI 1124175724 (734) 455-4600

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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 48154 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
$177.36 typical visit price
range $58.04 – $177.36
Typical copayment $44.34 (range $14.51 – $44.34)
Most-billed visit code 99205
Established Patient
$102.35 typical visit price
range $18.32 – $143.49
Typical copayment $25.58 (range $4.58 – $35.87)
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.

Other Providers at the Same Location NPPES 20

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

KHALED H EL-HOSHY MD PC
Dermatology
14555 LEVAN RD, STE 410
LIVONIA, MI 48154
Wayne County (734) 462-9499
DR. MARK R. VILLENEUVE MD
Internal Medicine (Pulmonary Disease)
14555 LEVAN RD, SUITE 202
LIVONIA, MI 48154
Wayne County (734) 542-4470
MARK UZANSKY DO
Otolaryngology (Otolaryngology/Facial Plastic Surgery)
14555 LEVAN RD, SUITE 206
LIVONIA, MI 48154
Wayne County (734) 953-0990
DR. MOHAMMAD JAVAID YOUSUF MD
Internal Medicine (Pulmonary Disease)
14555 LEVAN RD, SUITE 404
LIVONIA, MI 48154
Wayne County (734) 462-1233
MR. JURGEN B JANSEN PT, MDT CERT, CLT
Physical Therapist
14555 LEVAN RD, SUITE 215B
LIVONIA, MI 48154
Wayne County (734) 542-9770
MRS. ERICA KARIM BLUM NP
Nurse Practitioner
14555 LEVAN RD, SUITE 311
LIVONIA, MI 48154
Wayne County (734) 655-2692
DR. MICHAEL NAGTALON GAMIAO MD
Internal Medicine (Pulmonary Disease)
14555 LEVAN RD, SUITE 404
LIVONIA, MI 48154
Wayne County (734) 462-1233
EAR, NOSE & THROAT INSTITUTE OF MICHIGAN, PLLC
Otolaryngology (Otolaryngology/Facial Plastic Surgery)
14555 LEVAN RD, SUITE 206
LIVONIA, MI 48154
Wayne County (734) 953-0990

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 Cortney Essak's NPI number?

The NPI number for Cortney Essak is 1437778446. It was assigned to this individual provider in the NPPES registry on April 9, 2020.

Where is Cortney Essak located?

Cortney Essak practices at 14555 Levan Rd, Livonia, MI 48154. The listed phone number is (734) 655-4800.

What is Cortney Essak's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.

Is Cortney Essak enrolled in Medicare?

Yes. Cortney Essak is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Cortney Essak's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Cortney Essak reassigns Medicare benefits to Iha Health Services Corporation (Plymouth, MI). 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 Cortney Essak's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Cortney Essak accept?

Health plans from Ambetter Health, Ambetter from Buckeye Health Plan, Ambetter from Meridian, Blue Care Network of Michigan and Blue Cross Blue Shield of Michigan Mutual Insurance Company and 1 other insurer list Cortney Essak 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 Cortney Essak was last updated on August 27, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 60 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.