DR. DENNIS ALAN PEACOCK MD
Accepted Insurance for NPI 1023223021
Internal Medicine in Chicago, IL

Active since May 11, 2007PECOS EnrolledAccepts Medicare Assignment

1333 W BELMONT AVE STE 100, CHICAGO, IL 60657(312) 694-2273(312) 694-1875 Get Directions

NPPES record last updated: May 27, 2022. Verified against the NPPES registry weekly; last sync: November 08, 2026.

Record update history: May 27, 2022, Jun 30, 2018, Feb 13, 2017 (3 updates tracked since 2017).

Does Dr. Peacock take my insurance?

Oscar Health includes Dr. Peacock in 8 Illinois plans sold on Get Covered Illinois for 2026.

InsurerOscar Health 8 plans

Call before you book: insurer directories can be out of date, so call the office at (312) 694-2273 to confirm your plan is accepted. These are Marketplace (ACA) plans only; employer, Medicare Advantage and Medicaid plans are not listed. The NPPES record lists a Mississippi Medicaid ID; ask the office which Medicaid plans it takes.

8 plans · 2026 plan year

Illinois plans 8 plans

Plans sold to Illinois residents. Costs are for the standard version of each plan.

Oscar Health

8 plans · HMO

Accepting new patients

Individual Illinois Choice network · 7 plans · Preferred tier

Gold Classic Standard (Choice)Network tier: PreferredHMOGold$2,00011574IL0010053View details

Gold Simple (Choice)Network tier: PreferredHMOGold$3,30011574IL0010057View details

Silver Classic Standard (Choice)Network tier: PreferredHMOSilver$6,00011574IL0010052View details

Silver Simple Diabetes (Choice)Network tier: PreferredHMOSilver$6,50011574IL0010045View details

Bronze Elite + PCP Saver Plus Rx (Choice)Network tier: PreferredHMOExpanded Bronze$011574IL0010055View details

Bronze Classic Standard (Choice)Network tier: PreferredHMOExpanded Bronze$7,50011574IL0010050View details

Bronze Simple (Choice)Network tier: PreferredHMOExpanded Bronze$9,00011574IL0010056View details

Individual Illinois Select network · 1 plan · Preferred tier

Silver Classic Standard (Select)Network tier: PreferredHMOSilver$6,00011574IL0020052View details

Questions about Dr. Peacock’s insurance

Does Dr. Peacock take Oscar Health?

For Illinois Marketplace plans, yes: Oscar Health includes Dr. Peacock in 8 plans for 2026. Call the office at (312) 694-2273 to confirm your plan before booking.

Is Dr. Peacock accepting new patients?

The insurers that list Dr. Peacock report that Dr. Peacock is accepting new patients. Call the office at (312) 694-2273 to confirm your plan before booking.

Do I need a referral to see Dr. Peacock?

Yes, the Illinois plans that list Dr. Peacock require a specialist referral.

Does Dr. Peacock accept Medicare?

Yes. CMS files show Dr. Peacock accepts Medicare assignment and is enrolled in PECOS, which allows ordering and referring for Medicare patients.

Important notice

NPI Profile is not an insurance company, agent or broker. We do not sell insurance, enroll anyone in a plan, or give tax, legal, financial or insurance advice. This free tool organizes public files from CMS and insurers so you can compare Marketplace plans and check whether your current or future doctor is in a plan’s network. It is not affiliated with CMS, HealthCare.gov, any state exchange or any insurer.

Premiums, costs, coverage, provider networks and plan availability can change and may differ from what is shown here. Premiums are full prices before subsidies (premium tax credits), and your actual cost depends on your household and income. Before you enroll, confirm the details with the insurer and the doctor’s office, and enroll through Get Covered Illinois. For help choosing a plan, HealthCare.gov lists free local assisters and licensed agents.

About this data

This page combines public files from insurers and from CMS. NPI Profile does not contract with insurers and does not decide who is in network.

Source	What it provides here	Source date
Insurer provider directory files	Which plans list this provider, network tier, accepting new patients, years listed. Insurers selling on HealthCare.gov must publish these files under CMS rules.	Oscar Health: Nov 5, 2026
CMS state-based exchange public use files	Plan details for states that run their own exchange, here Illinois. No document links.	Plan year 2026, Jun 3, 2026

Only Marketplace (ACA) plans are covered. Employer, Medicare Advantage and Medicaid managed care networks are not in these files.
Costs are for the standard version of each plan. People who qualify for cost-sharing reductions pay less on Silver plans.
Accepting new patients and network tier are reported by each insurer, and can differ from what the practice tells you.
Networks change during the year. Confirm with your insurer or the practice before booking.