Cortney Essak, MD
Hematology & Oncology Physician · Livonia, MI
Cortney Essak, MD is a hematology & oncology physician with a practice address in Livonia, Michigan, and NPI 1437778446, issued on Apr 9, 2020. Check the license (Michigan 4301518446, as entered in NPPES) on the Michigan Board of Medicine (LARA); the Medicare figures below come from public CMS files.
- Name
- Cortney Essak
- Credential
- MD
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- 4301518446 MI
Self-reported in NPPES; status is on the state search - Practice location
- 36475 Five Mile RD, Livonia, MI 48154
- Phone
- (734) 655-4800
- Enumerated
- Apr 9, 2020
- Record last updated
- Jul 6, 2026
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 340 in Michigan → Look up another NPI →
Also registered at 36475 Five Mile RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Melissa ArpasiStudent in an Organized Health Care Education/Training Program1083551071
- Macy Au Fliegner, M.D.Surgery Physician1952795411
- Dawn Aubuchon, CRNACertified Registered Nurse Anesthetist1477738730
- Mohamed Awadalla, MDStudent in an Organized Health Care Education/Training Program1730020777
Verify Cortney Essak in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)
Search for license 4301518446Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
60% fewer Medicare Part D claims than the average hematology & oncology physician in 2024
352 Medicare Part D claims for 106 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. Brand-name drugs were 26% of claims.
Most prescribed
- Revlimid26 claims
- Ondansetron Odt17 claims
- Dexamethasone16 claims
- Hydroxyurea16 claims
- Olanzapine15 claims
- Prochlorperazine Maleate13 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Cortney Essak among 340 hematology & oncology physician records in Michigan
Cortney Essak, MD is one of 340 hematology & oncology physician records with a practice address in Michigan. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2020, is newer than 88% of them.
- NPI issued2020 · 88% of these records are older, 8% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileNo · 61% of these records are
- Record last updated2026 · 52% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RH0003X and a Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hematology & Oncology Physician providers in Michigan
There are 340 hematology & oncology physician records in Michigan.
All 340 in Michigan → Every provider in Livonia → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Ambujam Krishnan, MDLivonia, MI 481541548231749
- Elaine Chottiner, M.D.Plymouth, MI 481701992705701
- Stephen Goldfarb, D.O.Garden City, MI 481351497755177
- Hussein Gharib, MDDearborn, MI 481261790305399
- Ruby GuptaDearborn, MI 481261669707402
- Faisal Musa, MDDearborn, MI 481261811138787
- Renu Pandit, M.D.Dearborn, MI 481261558324129
- Oscar Signori, MDDearborn, MI 481261285601435
Common questions
What is Cortney Essak, MD's NPI number?
Cortney Essak, MD's National Provider Identifier (NPI) is 1437778446, issued on Apr 9, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Cortney Essak, MD located?
The NPPES record lists a practice address at 36475 Five Mile RD, Livonia, MI, 48154. Phone: (734) 655-4800. Providers update this record themselves, so call before visiting.
How can I verify Cortney Essak, MD's license?
NPPES lists Michigan license number 4301518446, as entered by the provider. Search the Michigan Board of Medicine (LARA) at https://aca-prod.accela.com/MILARA/GeneralProperty/PropertyLookUp.aspx?isLicensee=Y&TabName=APO. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Cortney Essak, MD prescribe under Medicare Part D?
In 2024, Cortney Essak, MD had 352 Medicare Part D claims for 106 beneficiaries; the average among hematology & oncology physician prescribers was 877. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.