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

Active since April 16, 2021PECOS EnrolledAccepts Medicare Assignment
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: November 08, 2026.

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

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, is affiliated with The University Of Chicago Medical Center, and is a graduate of Loyola University Of Chicago, Stritch School Of Medicine (2021).

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
Medical School CMSLoyola University Of Chicago, Stritch School Of MedicineGraduated 2021
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, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Daniel Seamus Peiffer Md, Phd 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 ID6406258920
PECOS Enrollment IDI20260803003323
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 Reassignments

2

Medicare enrollment records show Daniel Peiffer reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

The University Of Chicago Medical Center
Same address
General Acute Care Hospital
5841 S MARYLAND AVE
Chicago, IL 60637
  • Reassigned Medicare billing, Illinois enrollment
  • 1,905 clinicians in this Medicare group
NPI 1033218128 (773) 702-1530
University Of Chicago
Same address
Multi-Specialty
5841 S MARYLAND AVE, UCPG/MC 1099
Chicago, IL 60637
  • Reassigned Medicare billing, Illinois enrollment
  • 2,237 clinicians in this Medicare group
NPI 1821048786 (773) 702-9200

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

Hospital Affiliations CMS Care Compare

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

The University Of Chicago Medical Center

Acute Care Hospitals · Chicago, IL
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number140088
Location5841 South MarylandChicago, IL 60637 · Cook County
Emergency services Birthing friendly

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
5841 S MARYLAND AVE STE MC7082
CHICAGO, IL 60637
Cook County (773) 795-0232
ABSON MADOLA JR. MD
Internal Medicine
5841 S MARYLAND AVE STE MC7082
CHICAGO, IL 60637
Cook County (773) 702-6840
DR. SHREE BOSE MD, PHD
Internal Medicine
5841 S MARYLAND AVE STE MC7082
CHICAGO, IL 60637
Cook County (773) 702-6840
YASMEEN ALEXANDER MURTAZA MD
Internal Medicine
5841 S MARYLAND AVE STE MC7082
CHICAGO, IL 60637
Cook County (773) 702-6840
DR. ANKUR SRIVASTAVA
Internal Medicine
5841 S MARYLAND AVE STE MC7082
CHICAGO, IL 60637
Cook County (773) 702-6840
MEAGAN MATUSKA
Student in an Organized Health Care Education/Training Program
5841 S MARYLAND AVE STE MC7082
CHICAGO, IL 60637
Cook County (773) 702-6840
DANIELA ROSE ANDERSON M.D.
Internal Medicine
5841 S MARYLAND AVE STE MC7082
CHICAGO, IL 60637
Cook County (773) 702-0309
BRIANNA LAMBERT MD
Internal Medicine
5841 S MARYLAND AVE STE MC7082
CHICAGO, IL 60637
Cook County (773) 702-6840

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 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.

Where is Daniel Peiffer located?

Daniel Peiffer practices at 5841 S Maryland Ave Ste Mc7082, Chicago, IL 60637. The listed phone number is (773) 702-6840.

What is Daniel Peiffer's specialty?

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

Is Daniel Peiffer enrolled in Medicare?

Yes. Daniel Peiffer 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.

Which organizations bill Medicare for Daniel Peiffer's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Daniel Peiffer reassigns Medicare benefits to 2 organizations: The University Of Chicago Medical Center (Chicago, IL) and University Of Chicago (Chicago, IL). Each 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 Daniel Peiffer's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Daniel Peiffer affiliated with any hospitals?

According to CMS data, Daniel Peiffer is affiliated with The University Of Chicago Medical Center.

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 3 months 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.