Ari Seifter
Hematology (Internal Medicine) Physician · Orland Park, IL
Ari Seifter is a hematology (internal medicine) physician with a practice address in Orland Park, Illinois, and NPI 1851785091, issued on Mar 25, 2015. Check the license (Illinois 036-145267, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Ari Seifter
- Primary taxonomy
- Hematology (Internal Medicine) Physician 207RH0000X
- License numbers
- 036-145267 IL
036145267 IL
125066528 IL
Self-reported in NPPES; status is on the state search - Practice location
- 9550 W 167TH St, Orland Park, IL 60467
- Phone
- (708) 873-4500
- Enumerated
- Mar 25, 2015
- Record last updated
- May 4, 2022
- Medicare enrollment
- Enrolled (PECOS I20210608000440); accepts Medicare assignment
- Medical or professional school
- University Of Maryland School Of Medicine, 2015
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest hematology (internal medicine) physician records → All 47 in Illinois → Look up another NPI →
Also registered at 9550 W 167TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Tiffany Applewhite, WHNP-BCWomen's Health Nurse Practitioner1578092227
- Dolphine Coleman, APRNFamily Nurse Practitioner1588717201
- Devyn Collins, FNPNurse Practitioner1881114049
- Scott Donnelly, DOSurgery Physician1407992738
- Sylvia Falls, MDHematology & Oncology Physician1528231750
- Jessica Gonzales, FNP-BCFamily Nurse Practitioner1689036659
Verify Ari Seifter in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional Regulation
Search for license 036-145267Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.1 times the Medicare Part D claims of the average hematology (internal medicine) physician in 2024
1,032 Medicare Part D claims for 167 beneficiaries, against an average of 496 among the 1,036 providers of this specialty who prescribed in Part D. Brand-name drugs were 29% of claims. 102 claims were for opioids.
Most prescribed
- Eliquis149 claims
- Prochlorperazine Maleate80 claims
- Ondansetron Hcl55 claims
- Hydroxyurea39 claims
- Xarelto39 claims
- Mirtazapine34 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.
Industry payments in 2024: $180.81
6 payments; by number, the most common kind was food and beverage; the largest payer was Tempus AI, Inc. The 721 providers of this specialty with any payment received $13,778.35 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Advocate Health And Hospitals CorporationChicago, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ari Seifter among 47 hematology (internal medicine) physician records in Illinois
Ari Seifter is one of 47 hematology (internal medicine) physician records with a practice address in Illinois. 85% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2015, is newer than 81% of them.
- NPI issued2015 · 81% of these records are older, 15% newer
- In a Medicare fileYes · 85% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2015 · median 2003 among the 31 with a school on file
- Record last updated2022 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RH0000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hematology (Internal Medicine) Physician providers in Illinois
There are 47 hematology (internal medicine) physician records in Illinois.
All 47 in Illinois → Every provider in Orland Park → Hematology (Internal Medicine) Physician nationwide →
The 8 hematology (internal medicine) physician records with the nearest ZIP codes
- James Jordan, M.D.Downers Grove, IL 605151922430842
- Nadia Khan, MDChicago, IL 606071659531499
- Kathleen Phelan, M.D.Chicago, IL 606071932363447
- Rebecca Steuer, MDChicago, IL 606071912535238
- Helen Gue, MDChicago, IL 606091326151796
- Olga Frankfurt, MDChicago, IL 606111962492611
- David Green, MDChicago, IL 606111053340364
- Hau Kwaan, MDChicago, IL 606111164537825
Common questions
What is Ari Seifter's NPI number?
Ari Seifter's National Provider Identifier (NPI) is 1851785091, issued on Mar 25, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Ari Seifter located?
The NPPES record lists a practice address at 9550 W 167TH St, Orland Park, IL, 60467. Phone: (708) 873-4500. Providers update this record themselves, so call before visiting.
How can I verify Ari Seifter's license?
NPPES lists Illinois license number 036-145267, as entered by the provider. Search the Illinois Department of Financial and Professional Regulation at https://idfpr.illinois.gov/checklicense.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Ari Seifter prescribe under Medicare Part D?
In 2024, Ari Seifter had 1,032 Medicare Part D claims for 167 beneficiaries; the average among hematology (internal medicine) physician prescribers was 496. 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.