DR. GRAHAM THOMAS MCMAHON M.D., M.M.SC.
NPI 1275512477
Internal Medicine - Endocrinology, Diabetes & Metabolism in Chicago, IL

Q: What is Graham Mcmahon's NPI number?

The NPI number for Graham Mcmahon is 1275512477. It was assigned to this individual provider in the NPPES registry on January 16, 2006.

Q: What is Graham Mcmahon's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Endocrinology, Diabetes & Metabolism, with taxonomy code 207RE0101X.

Q: When was this NPI record last updated?

The NPPES record for Graham Mcmahon was last updated on July 23, 2021. NPI Profile syncs with the weekly NPPES data releases published by CMS.

Active since January 16, 2006PECOS Enrolled

4025 N SHERIDAN RD, CHICAGO, IL 60613(773) 388-1600(773) 388-1602 Get Directions Write a Review

NPPES record last updated: July 23, 2021. Verified against the NPPES registry weekly; last sync: July 19, 2026.

Record update history: Jul 23, 2021, Aug 9, 2018 (2 updates tracked since 2018).

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About Dr. Graham Thomas Mcmahon M.d., M.m.sc. NPPES

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

DR. GRAHAM THOMAS MCMAHON M.D., M.M.SC. (NPI 1275512477) is an individual endocrinology, diabetes & metabolism provider in Chicago, Illinois, licensed in Illinois (036.139549) and active in the NPI registry since January 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1275512477

Entity TypeIndividualMale

Primary Taxonomy207RE0101X

Provider Legal NameDR. GRAHAM THOMAS MCMAHONCredential: M.D., M.M.SC.

Location Address4025 N SHERIDAN RDChicago, IL 60613

Mailing Address4025 N Sheridan RdChicago, IL 60613-2010 · (773) 388-1600 · Fax (773) 961-7308

Phone(773) 388-1600

Fax(773) 388-1602

Sole ProprietorYes

Enumeration DateJanuary 16, 2006

Last NPPES UpdateJuly 23, 20212 updates tracked since enumeration

NPPES CertifiedJuly 23, 2021

✔ NPI 1275512477 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Endocrinology, Diabetes & MetabolismAllopathic & Osteopathic Physicians

Taxonomy Code207RE0101X

Licenses✔ Licensed in IL · 036.139549✔ Licensed in MA · 205297

Definition

An internist who concentrates on disorders of the internal (endocrine) glands such as the thyroid and adrenal glands. This specialist also deals with disorders such as diabetes, metabolic and nutritional disorders, obesity, pituitary diseases and menstrual and sexual problems.

4025 N SHERIDAN RD, Chicago, IL 60613

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Other Identifiers 1

Medicaid036.139549IL

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 (PECOS)

Dr. Graham Thomas Mcmahon M.d., M.m.sc. 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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60613 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.

Supply allowance for therapeutic continuous glucose monitor (cgm), includes all supplies and accessories, 1 month supply = 1 unit of service K0553

DME-Other DME · category DE017N

1 supplier12 claims12 services$183.77 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.

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