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DR. GRANT ROBERT WHITMER MD
NPI 1225511678
Internal Medicine in Chicago, IL

Active since September 12, 2018PECOS Enrolled
251 E HURON ST, CHICAGO, IL 60611(312) 503-7975 Get Directions Write a Review

NPPES record last updated: January 30, 2025. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: May 25, 2022, Sep 12, 2018 (2 updates tracked since 2018).

About Dr. Grant Robert Whitmer Md NPPES

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

DR. GRANT ROBERT WHITMER MD (NPI 1225511678) is an individual internal medicine provider in Chicago, Illinois, licensed in Illinois (036172718) and active in the NPI registry since September 2018. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1225511678
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. GRANT ROBERT WHITMERCredential: MD
Location Address251 E HURON STChicago, IL 60611-2908
Mailing Address240 E Huron St Ste 1-200Chicago, IL 60611-2909 · (312) 503-7975
Phone(312) 503-7975
Sole ProprietorNo
Enumeration DateSeptember 12, 2018
Last NPPES UpdateJanuary 30, 20252 updates tracked since enumeration
NPPES CertifiedJanuary 30, 2025
✔ NPI 1225511678 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in IL · 036172718
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X
251 E HURON ST, Chicago, IL 60611
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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)

Dr. Grant Robert Whitmer Md 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 60611 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
$138.86 typical visit price
range $60.08 – $183.39
Typical copayment $34.71 (range $15.02 – $45.84)
Most-billed visit code 99204
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.

MARK WANG M.D.
Pathology (Anatomic Pathology & Clinical Pathology)
251 E HURON ST, FEINBERG PAVILION
CHICAGO, IL 60611
Cook County (312) 503-8144
DR. MARLEY ANN DOYLE M/D.
Psychiatry & Neurology (Psychiatry)
251 E HURON ST, GALTER 3-150, C
CHICAGO, IL 60611
Cook County (312) 926-6895
CASSIDY SCHWAB MD
Anesthesiology
251 E HURON ST
CHICAGO, IL 60611
Cook County (312) 695-0061
SEONG PARK
Internal Medicine
251 E HURON ST
CHICAGO, IL 60611
Cook County (312) 926-2000
EMMA WALLS GREEVER MD
Emergency Medicine
251 E HURON ST
CHICAGO, IL 60611
Cook County (312) 926-2000
NICOLE ELIZABETH TRUPIANO MD
Dermatology
251 E HURON ST
CHICAGO, IL 60611
Cook County (312) 926-2000
ASHRAF SAMHAN MD
Internal Medicine
251 E HURON ST
CHICAGO, IL 60611
Cook County (312) 926-2000
DR. SABINA SPIGNER MD, MS, MPH
Obstetrics & Gynecology
251 E HURON ST
CHICAGO, IL 60611
Cook County (312) 926-2000

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 Grant Whitmer's NPI number?

The NPI number for Grant Whitmer is 1225511678. It was assigned to this individual provider in the NPPES registry on September 12, 2018.

Where is Grant Whitmer located?

Grant Whitmer practices at 251 E Huron St, Chicago, IL 60611. The listed phone number is (312) 503-7975.

What is Grant Whitmer's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Grant Whitmer enrolled in Medicare?

Yes. Grant Whitmer is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Grant Whitmer was last updated on January 30, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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.