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DR. GREGORY S. RAUCH M.D.
NPI 1912921297
Internal Medicine in Chicago, IL

Active since July 27, 2006PECOS EnrolledAccepts Medicare Assignment
6500 N CLARK ST, CHICAGO, IL 60626(773) 388-1600(708) 364-7080 Get Directions Write a Review

NPPES record last updated: June 28, 2022. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Dr. Gregory S. Rauch M.d. NPPES

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

DR. GREGORY S. RAUCH M.D. (NPI 1912921297) is an individual internal medicine provider in Chicago, Illinois, licensed in Illinois (036.113393) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS, maintains a secondary practice location in Orland Park, and is a graduate of Baylor College Of Medicine (2002).

NPPES Registry Identity

NPI1912921297
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. GREGORY S. RAUCHCredential: M.D.
Location Address6500 N CLARK STChicago, IL 60626-4097
Mailing Address6500 N Clark StChicago, IL 60626-4097 · (773) 388-1600 · Fax (708) 364-7080
Phone(773) 388-1600
Fax(708) 364-7080
Sole ProprietorNo
Medical School CMSBaylor College Of MedicineGraduated 2002
Enumeration DateJuly 27, 2006
Last NPPES UpdateJune 28, 2022
NPPES CertifiedJune 28, 2022
✔ NPI 1912921297 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in IL · 036.113393
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.
6500 N CLARK ST, Chicago, IL 60626
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Secondary Practice Location 1

Location 116660 S. 107th Ave.Orland Park, IL 60467-8898 · Phone (708) 403-8500 · Fax (708) 364-7080

Other Identifiers 5

Other705600IL · Medicare Group #
Other7400752IL · Aetna Provider Id#
Other01630151IL · Bcbs Provider Group #
Medicaid036113393IL
Other14D0991123IL · Clia #

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter Health, Ambetter Health of Delaware.Insurance ›

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

Dr. Gregory S. Rauch M.d. 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 ID345285292
PECOS Enrollment IDI20050622000470
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 Gregory Rauch reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Howard Brown Health Center
Same address
Federally Qualified Health Center (FQHC)
6500 N CLARK ST
Chicago, IL 60626
  • Reassigned Medicare billing, Illinois enrollment
  • 143 clinicians in this Medicare group
NPI 1912382227 (773) 388-1600
Rush University Medical Center
8.6 mi
Diagnostic Radiology
1620 W HARRISON ST
Chicago, IL 60612
  • Reassigned Medicare billing, Illinois enrollment
  • Medicare enrollment name: Rush University Medical Group
  • 2,169 clinicians in this Medicare group
NPI 1184269425 (312) 563-4270

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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60626 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 17

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

ERIKA JEANNE BIELENSTEIN LCPC
Counselor (Professional)
6500 N CLARK ST
CHICAGO, IL 60626
Cook County (773) 388-1600
DR. ERIC CHRISTOFF M.D.
Internal Medicine
6500 N CLARK ST
CHICAGO, IL 60626
Cook County (773) 388-1600
CALEB MANUEL REYES PSYCHIATRIST
Psychiatry & Neurology (Psychiatry)
6500 N CLARK ST
CHICAGO, IL 60626
Cook County (773) 388-1600
DR. ONEL MARTINEZ
Family Medicine
6500 N CLARK ST
CHICAGO, IL 60626
Cook County (773) 388-1600
MAGDA MARIE HOULBERG M.D.
Internal Medicine
6500 N CLARK ST
CHICAGO, IL 60626
Cook County (773) 388-1600
ENA KOVAC
Pharmacist
6500 N CLARK ST
CHICAGO, IL 60626
Cook County (773) 681-5033
WALGREEN CO
Pharmacy
6500 N CLARK ST, STE 101
CHICAGO, IL 60626
Cook County (773) 681-5033
MR. PATRICK BRIAN GIBBONS D.O.
Family Medicine
6500 N CLARK ST
CHICAGO, IL 60626
Cook County (773) 388-1600

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 Gregory Rauch's NPI number?

The NPI number for Gregory Rauch is 1912921297. It was assigned to this individual provider in the NPPES registry on July 27, 2006.

Where is Gregory Rauch located?

Gregory Rauch practices at 6500 N Clark St, Chicago, IL 60626. The listed phone number is (773) 388-1600.

What is Gregory Rauch's specialty?

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

Is Gregory Rauch enrolled in Medicare?

Yes. Gregory Rauch 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 Gregory Rauch's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Gregory Rauch reassigns Medicare benefits to 2 organizations: Howard Brown Health Center (Chicago, IL) and Rush University Medical Center (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 Gregory Rauch's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Gregory Rauch accept?

Health plans from Ambetter Health and Ambetter Health of Delaware list Gregory Rauch as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Gregory Rauch was last updated on June 28, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 years 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.