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DR. PETER PAUL MAYOCK M.D.
NPI 1285735142
Internal Medicine in Chicago, IL

Active since September 25, 2006PECOS Enrolled
845 W WILSON AVE, CHICAGO, IL 60640(773) 506-4283(773) 989-5986 Get Directions Write a Review

NPPES record last updated: February 23, 2022. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Dr. Peter Paul Mayock M.d. NPPES

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

DR. PETER PAUL MAYOCK M.D. (NPI 1285735142) is an individual internal medicine provider in Chicago, Illinois, licensed in Illinois (036084492) and active in the NPI registry since September 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1285735142
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. PETER PAUL MAYOCKCredential: M.D.
Location Address845 W WILSON AVEChicago, IL 60640-8090
Mailing Address845 W Wilson AveChicago, IL 60640-8090 · (773) 506-4283
Phone(773) 506-4283
Fax(773) 989-5986
Sole ProprietorNo
Enumeration DateSeptember 25, 2006
Last NPPES UpdateFebruary 23, 2022
NPPES CertifiedFebruary 23, 2022
✔ NPI 1285735142 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 · 036084492
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.
845 W WILSON AVE, Chicago, IL 60640
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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 (PECOS)

Dr. Peter Paul Mayock M.d. 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.

Medicare Billing Reassignment

Medicare enrollment records show Peter Mayock reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Erie Family Health Center Inc.
1.1 mi
Federally Qualified Health Center (FQHC)
4015 N ASHLAND AVE
Chicago, IL 60613
  • Reassigned Medicare billing, Illinois enrollment
  • 383 clinicians in this Medicare group
NPI 1215228192 (312) 666-3494

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 60640 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.

Referred Medical Equipment & Supplies CMS DME claims

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips A4253
DME-Other DME · category DE017N
9 suppliers21 claims51 services$3.78 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

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.

MICHELLE NUCUP LCPC, CADC
Counselor (Professional)
845 W WILSON AVE
CHICAGO, IL 60640
Cook County (773) 506-4283
SOPHIE KERN
Family Medicine
845 W WILSON AVE
CHICAGO, IL 60640
Cook County (773) 506-4283
NANA TSULADZE
Social Worker (Clinical)
845 W WILSON AVE
CHICAGO, IL 60640
Cook County (872) 268-7617
CHICAGO DEPARTMENT OF PUBLIC HEALTH
Clinic/Center (Community Health)
845 W WILSON AVE
CHICAGO, IL 60640
Cook County (312) 744-1938
DRUG CENTER PHARMACY, INC
Pharmacy (Community/Retail Pharmacy)
845 W WILSON AVE
CHICAGO, IL 60640
Cook County (773) 681-0080
OLGA LUGO-TORRES MD
Internal Medicine
845 W WILSON AVE
CHICAGO, IL 60640
Cook County (312) 744-1935
KRISTIN L ALLEN FNP, RN
Nurse Practitioner (Family)
845 W WILSON AVE
CHICAGO, IL 60640
Cook County (773) 506-4283
DR. TALIA HORWITZ EISENSTEIN MD
Family Medicine
845 W WILSON AVE
CHICAGO, IL 60640
Cook County (773) 506-4283

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 Peter Mayock's NPI number?

The NPI number for Peter Mayock is 1285735142. It was assigned to this individual provider in the NPPES registry on September 25, 2006.

Where is Peter Mayock located?

Peter Mayock practices at 845 W Wilson Ave, Chicago, IL 60640. The listed phone number is (773) 506-4283.

What is Peter Mayock's specialty?

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

Is Peter Mayock enrolled in Medicare?

Yes. Peter Mayock is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Peter Mayock's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Peter Mayock reassigns Medicare benefits to Erie Family Health Center Inc. (Chicago, IL). The 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 Peter Mayock's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Peter Mayock accept?

Health plans from Ambetter Health and Ambetter Health of Delaware list Peter Mayock 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 Peter Mayock was last updated on February 23, 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.