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DR. GABRIEL J MARTINEZ-DIAZ M.D.
NPI 1245556695
Dermatology in Chicago, IL

Active since April 09, 2010PECOS EnrolledAccepts Medicare Assignment
1021 W. ADAMS ST., L L # 1, CHICAGO, IL 60607(312) 579-0700(312) 579-0701 Get Directions Write a Review

NPPES record last updated: July 21, 2022. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jul 21, 2022, Dec 6, 2021, Mar 12, 2021 and 5 more (8 updates tracked since 2017).

About Dr. Gabriel J Martinez-diaz M.d. NPPES

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

DR. GABRIEL J MARTINEZ-DIAZ M.D. (NPI 1245556695) is an individual dermatology provider in Chicago, Illinois, licensed in Illinois (036138747) and active in the NPI registry since April 2010. He is enrolled in Medicare PECOS, maintains a secondary practice location in Hoffman Estates, and is a graduate of Stanford University School Of Medicine (2010).

NPPES Registry Identity

NPI1245556695
Entity TypeIndividualMale
Primary Taxonomy207N00000X
Provider Legal NameDR. GABRIEL J MARTINEZ-DIAZCredential: M.D.
Location Address1021 W. ADAMS ST., L L # 1Chicago, IL 60607
Mailing Address1021 W Adams St Ste LlChicago, IL 60607-2934 · (312) 579-0700 · Fax (312) 579-0701
Phone(312) 579-0700
Fax(312) 579-0701
Sole ProprietorYes
Medical School CMSStanford University School Of MedicineGraduated 2010
Enumeration DateApril 9, 2010
Last NPPES UpdateJuly 21, 20228 updates tracked since enumeration
NPPES CertifiedDecember 6, 2021
✔ NPI 1245556695 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyDermatologyAllopathic & Osteopathic Physicians
Taxonomy Code207N00000X
License✔ Licensed in IL · 036138747
Definition
A dermatologist is trained to diagnose and treat pediatric and adult patients with benign and malignant disorders of the skin, mouth, external genitalia, hair and nails, as well as a number of sexually transmitted diseases. The dermatologist has had additional training and experience in the diagnosis and treatment of skin cancers, melanomas, moles and other tumors of the skin, the management of contact dermatitis and other allergic and nonallergic skin disorders, and in the recognition of the skin manifestations of systemic (including internal malignancy) and infectious diseases. Dermatologists have special training in dermatopathology and in the surgical techniques used in dermatology. They also have expertise in the management of cosmetic disorders of the skin such as hair loss and scars and the skin changes associated with aging.
Also ListedDermatology · Procedural DermatologyTaxonomy 207NS0135X · License 036138747 (IL)
1021 W. ADAMS ST., Chicago, IL 60607
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Secondary Practice Location 1

Location 14885 Hoffman Blvd # 407Hoffman Estates, IL 60192-3726 · Phone (224) 484-0183 · Fax (224) 699-9301

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

Dr. Gabriel J Martinez-diaz 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 ID4789815952
PECOS Enrollment IDI20151007000497
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 Gabriel Martinez-diaz reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

M D Aesthetics And Dermatology LLC
Same address
Dermatology
1021 W ADAMS ST, LL # 1
Chicago, IL 60607
  • Reassigned Medicare billing, Illinois enrollment
NPI 1437678133 (312) 579-0700

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 60607 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
$94.06 typical visit price
range $60.08 – $183.39
Typical copayment $23.51 (range $15.02 – $45.84)
Most-billed visit code 99203
Established Patient
$74.80 typical visit price
range $18.97 – $148.12
Typical copayment $18.70 (range $4.74 – $37.03)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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 Gabriel Martinez-diaz's NPI number?

The NPI number for Gabriel Martinez-diaz is 1245556695. It was assigned to this individual provider in the NPPES registry on April 9, 2010.

Where is Gabriel Martinez-diaz located?

Gabriel Martinez-diaz practices at 1021 W. Adams St. L L # 1, Chicago, IL 60607. The listed phone number is (312) 579-0700.

What is Gabriel Martinez-diaz's specialty?

The primary specialty registered for this NPI is Dermatology with taxonomy code 207N00000X.

Is Gabriel Martinez-diaz enrolled in Medicare?

Yes. Gabriel Martinez-diaz 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 organization bills Medicare for Gabriel Martinez-diaz's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Gabriel Martinez-diaz reassigns Medicare benefits to M D Aesthetics And Dermatology LLC (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 Gabriel Martinez-diaz's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Gabriel Martinez-diaz was last updated on July 21, 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.