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

DANIEL SEAMUS PEIFFER MD, PHD
NPI 1912588328
Internal Medicine - Medical Oncology in Chicago, IL

Q: What is Daniel Peiffer's NPI number?

The NPI number for Daniel Peiffer is 1912588328. It was assigned to this individual provider in the NPPES registry on April 16, 2021.

Q: What is Daniel Peiffer's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Medical Oncology, with taxonomy code 207RX0202X.

Q: When was this NPI record last updated?

The NPPES record for Daniel Peiffer was last updated on July 22, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 20 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.

Active since April 16, 2021PECOS Enrolled

5841 S MARYLAND AVE STE MC7082, CHICAGO, IL 60637(773) 702-6840(773) 834-3950 Get Directions Write a Review

NPPES record last updated: July 22, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Jul 22, 2026, Apr 16, 2021 (2 updates tracked since 2021).

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About Daniel Seamus Peiffer Md, Phd NPPES

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

DANIEL SEAMUS PEIFFER MD, PHD (NPI 1912588328) is an individual medical oncology provider in Chicago, Illinois, licensed in Illinois (036178820) and active in the NPI registry since April 2021. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1912588328

Entity TypeIndividualMale

Primary Taxonomy207RX0202X

Provider Legal NameDANIEL SEAMUS PEIFFERCredential: MD, PHD

Location Address5841 S MARYLAND AVE STE MC7082Chicago, IL 60637-1465

Mailing Address150 Harvester Dr Ste 300Burr Ridge, IL 60527-5965

Phone(773) 702-6840

Fax(773) 834-3950

Sole ProprietorNo

Enumeration DateApril 16, 2021

Last NPPES UpdateJuly 22, 20262 updates tracked since enumeration

NPPES CertifiedJuly 22, 2026

✔ NPI 1912588328 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Medical OncologyAllopathic & Osteopathic Physicians

Taxonomy Code207RX0202X

License✔ Licensed in IL · 036178820

Definition

An internist who specializes in the diagnosis and treatment of all types of cancer and other benign and malignant tumors. This specialist decides on and administers therapy for these malignancies as well as consults with surgeons and radiotherapists on other treatments for cancer.

5841 S MARYLAND AVE STE MC7082, Chicago, IL 60637

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Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Daniel Seamus Peiffer Md, Phd is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60637 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

$183.39 typical visit price

range $60.08 – $183.39

Typical copayment $45.84 (range $15.02 – $45.84)

Most-billed visit code 99205

Established Patient

$105.70 typical visit price

range $18.97 – $148.12

Typical copayment $26.42 (range $4.74 – $37.03)

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.

SARAH JARJOUR

Internal Medicine