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MERRILL ZAHTZ M.D.
NPI 1225097819
Internal Medicine in Chicago, IL

Active since March 21, 2006PECOS EnrolledAccepts Medicare Assignment
6374 N LINCOLN AVE, CHICAGO, IL 60659(872) 270-5999 Get Directions Write a Review

NPPES record last updated: August 5, 2025. Verified against the NPPES registry weekly; last sync: July 26, 2026.

Record update history: Aug 5, 2025, Sep 1, 2017 (2 updates tracked since 2017).

About Merrill Zahtz M.d. NPPES

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

MERRILL ZAHTZ M.D. (NPI 1225097819) is an individual internal medicine provider in Chicago, Illinois, licensed in Illinois (036-056-363) and active in the NPI registry since March 2006. He is enrolled in Medicare PECOS and is a graduate of Other (1975).

NPPES Registry Identity

NPI1225097819
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameMERRILL ZAHTZCredential: M.D.
Location Address6374 N LINCOLN AVEChicago, IL 60659-1275
Mailing Address3525 W Granville AveChicago, IL 60659-2221
Phone(872) 270-5999
Sole ProprietorYes
Medical School CMSOtherGraduated 1975
Enumeration DateMarch 21, 2006
Last NPPES UpdateAugust 5, 20252 updates tracked since enumeration
NPPES CertifiedAugust 5, 2025
✔ NPI 1225097819 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 · 036-056-363
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.
6374 N LINCOLN AVE, Chicago, IL 60659
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Other Identifiers 1

Medicaid0360563631IL

Accepted Insurance

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

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Merrill Zahtz 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 ID9234164385
PECOS Enrollment IDI20050928000454
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.

Areas of Expertise CMS Part B claims 2

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.
38 services12 patients
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
34 services11 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60659 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.

DR. ALBAN GEORGE FISHER PHD
Counselor (Professional)
6374 N LINCOLN AVE
CHICAGO, IL 60659
Cook County (872) 270-5999
BARRY P ATLAS M.D.
Internal Medicine
6374 N LINCOLN AVE, SUITE 312
CHICAGO, IL 60659
Cook County (773) 588-7710
MARK MEER PSYD
Psychologist (Clinical)
6374 N LINCOLN AVE
CHICAGO, IL 60659
Cook County (872) 270-5999
INTERNAL MEDICINE AFFILIATES,S.C.
Internal Medicine
6374 N LINCOLN AVE, SUITE 303
CHICAGO, IL 60659
Cook County (773) 588-7733
NORTHSHORE PEDIATRICS ASSOCIATES,S.C.
Specialist
6374 N LINCOLN AVE, SUITE 203
CHICAGO, IL 60659
Cook County (773) 509-0023
ESTHER CHAYA PERMAN LMSW
Social Worker
6374 N LINCOLN AVE
CHICAGO, IL 60659
Cook County (872) 270-5999
SHAINA PEYSIN LSW
Social Worker
6374 N LINCOLN AVE
CHICAGO, IL 60659
Cook County (872) 270-5999
DERMATOLOGY CONSULTANTS LTD
Dermatology
6374 N LINCOLN AVE, SUITE 202
CHICAGO, IL 60659
Cook County (773) 267-8820

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 Merrill Zahtz's NPI number?

The NPI number for Merrill Zahtz is 1225097819. It was assigned to this individual provider in the NPPES registry on March 21, 2006.

Where is Merrill Zahtz located?

Merrill Zahtz practices at 6374 N Lincoln Ave, Chicago, IL 60659. The listed phone number is (872) 270-5999.

What is Merrill Zahtz's specialty?

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

Is Merrill Zahtz enrolled in Medicare?

Yes. Merrill Zahtz 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.

What insurance does Merrill Zahtz accept?

Health plans from Ambetter Health, Ambetter Health of Delaware and Ambetter from Home State Health list Merrill Zahtz 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 Merrill Zahtz was last updated on August 5, 2025. NPI Profile syncs with the weekly NPPES data releases published by CMS.