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STEVEN FLAMM MD
NPI 1912937244
Internal Medicine - Gastroenterology in Chicago, IL

Active since July 03, 2006PECOS EnrolledAccepts Medicare Assignment
675 N SAINT CLAIR ST, GALTER 17-200, CHICAGO, IL 60611(312) 695-4837(312) 695-5998 Get Directions Write a Review

NPPES record last updated: July 6, 2009. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Steven Flamm Md NPPES

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

STEVEN FLAMM MD (NPI 1912937244) is an individual gastroenterology provider in Chicago, Illinois, licensed in Illinois (036092931) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS, is affiliated with Advocate Sherman Hospital, and is a graduate of Perelman School Of Med At The University Of Pennsylvania (1989).

NPPES Registry Identity

NPI1912937244
Entity TypeIndividualMale
Primary Taxonomy207RG0100X
Provider Legal NameSTEVEN FLAMMCredential: MD
Location Address675 N SAINT CLAIR ST, GALTER 17-200Chicago, IL 60611-5975
Mailing Address680 N Lake Shore Dr, Suite 1000Chicago, IL 60611-4546 · (312) 695-4837 · Fax (312) 695-5998
Phone(312) 695-4837
Fax(312) 695-5998
Sole ProprietorNo
Medical School CMSPerelman School Of Med At The University Of PennsylvaniaGraduated 1989
Enumeration DateJuly 3, 2006
Last NPPES UpdateJuly 6, 2009
✔ NPI 1912937244 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians
Taxonomy Code207RG0100X
License✔ Licensed in IL · 036092931
Definition
An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.
675 N SAINT CLAIR ST, Chicago, IL 60611
Open in Google Maps ↗

Other Identifiers 1

Medicare UPING23094

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

Steven Flamm Md 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 ID3173586534
PECOS Enrollment IDI20041105000994, I20221205000890
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

3

Medicare enrollment records show Steven Flamm reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Rush University Medical Center
2.3 mi
Internal Medicine
1411 S MICHIGAN AVE
Chicago, IL 60605
  • Reassigned Medicare billing, Illinois and Indiana enrollments
  • Medicare enrollment name: Rush University Medical Group
  • Also billed through NPI 1093819542 (Indiana)
  • 2,169 clinicians in this Medicare group
NPI 1689165540 (312) 563-0654
Rush Medical Group
3.1 mi
Internal Medicine
1620 W HARRISON ST
Chicago, IL 60612
  • Reassigned Medicare billing, Illinois and Indiana enrollments
  • 548 clinicians in this Medicare group
NPI 1467312850 (312) 942-5000
Illinois Gastroenterology Group, LLC
39 mi
Gastroenterology
745 FLETCHER DRIVE
Elgin, IL 60123
  • Reassigned Medicare billing, Illinois enrollment
  • 235 clinicians in this Medicare group
NPI 1316277817 (847) 888-1300

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

Areas of Expertise CMS Part B claims 4

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
80 services64 patients
New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205
This is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.
56 services56 patients
New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205
This is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.
21 services21 patients
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
18 services17 patients

Hospital Affiliations CMS Care Compare 5

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

Advocate Sherman Hospital

Acute Care Hospitals · Elgin, IL
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number140030
Location1425 North Randall RoadElgin, IL 60123 · Kane County
Emergency services Birthing friendly

Rush University Medical Center

Acute Care Hospitals · Chicago, IL
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number140119
Location1653 West Congress ParkwayChicago, IL 60612 · Cook County
Emergency services Birthing friendly

Northwestern Medicine Central Dupage Hospital

Acute Care Hospitals · Winfield, IL
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number140242
Location25 North Winfield RoadWinfield, IL 60190 · Du Page County
Emergency services Birthing friendly

Northwest Community Hospital 1

Acute Care Hospitals · Arlington Heights, IL
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number140252
Location800 W Central RoadArlington Heights, IL 60005 · Cook County
Emergency services Birthing friendly

Community Hospital

Acute Care Hospitals · Munster, IN
2/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number150125
Location901 Macarthur BlvdMunster, IN 46321 · Lake County
Emergency services Birthing friendly

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.

TAYLOR MARIE HOGAN WINTERHALER AGACNP-BC
Nurse Practitioner (Acute Care)
675 N SAINT CLAIR ST
CHICAGO, IL 60611
Cook County (206) 883-7722
SHARON A ALLEN APRN
Nurse Practitioner (Adult Health)
675 N SAINT CLAIR ST, 21-100
CHICAGO, IL 60611
Cook County (312) 695-0316
HERON RODRIGUEZ MD
Surgery (Vascular Surgery)
675 N SAINT CLAIR ST, NORTHWESTERN MEMORIAL HOSPIALT GALTER 19-100
CHICAGO, IL 60611
Cook County (312) 695-2714
DR. DARREN MICHAEL BRENNER M.D.
Internal Medicine (Gastroenterology)
675 N SAINT CLAIR ST, SUITE 17-250
CHICAGO, IL 60611
Cook County (312) 695-5620
DR. ABDUL AZIZ AADAM M.D.
Internal Medicine (Gastroenterology)
675 N SAINT CLAIR ST, GASTROENTEROLOGY - SUITE 1400
CHICAGO, IL 60611
Cook County (312) 926-2000
JAN ELMAN STOUT PSYD
Psychologist (Clinical)
675 N SAINT CLAIR ST, SUITE 14-200
CHICAGO, IL 60611
Cook County (312) 695-7269
EMILY ELIZABETH HANDLEY OTD, OTR/L
Occupational Therapist
675 N SAINT CLAIR ST
CHICAGO, IL 60611
Cook County (815) 919-1791
SEEMA SINGHAL MD
Internal Medicine (Hematology)
675 N SAINT CLAIR ST, GALTER 21-100
CHICAGO, IL 60611
Cook County (312) 695-0990

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 Steven Flamm's NPI number?

The NPI number for Steven Flamm is 1912937244. It was assigned to this individual provider in the NPPES registry on July 3, 2006.

Where is Steven Flamm located?

Steven Flamm practices at 675 N Saint Clair St Galter 17-200, Chicago, IL 60611. The listed phone number is (312) 695-4837.

What is Steven Flamm's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Is Steven Flamm enrolled in Medicare?

Yes. Steven Flamm 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 Steven Flamm's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Steven Flamm reassigns Medicare benefits to 3 organizations: Rush University Medical Center (Chicago, IL), Rush Medical Group (Chicago, IL) and Illinois Gastroenterology Group, LLC (Elgin, 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 Steven Flamm's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Steven Flamm accept?

Health plans from Ambetter Health and Ambetter Health of Delaware list Steven Flamm 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.

Is Steven Flamm affiliated with any hospitals?

According to CMS data, Steven Flamm is affiliated with Advocate Sherman Hospital, Rush University Medical Center, Northwestern Medicine Central Dupage Hospital, Northwest Community Hospital 1 and Community Hospital.

When was this NPI record last updated?

The NPPES record for Steven Flamm was last updated on July 6, 2009. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 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.