Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Martha Tobias-Contreras, RDH
Dental Hygienist in Chicago, IL · enumerated 2022.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1356061428
See something wrong? Report a correction
Registry record
Entity type Individual (Type 1)
Name Martha Tobias-Contreras
Credential RDH
Sex Female
Practice address 641 W 63rd St, Chicago, IL, 60621
Phone (773) 388-1600
Enumeration date Aug 30, 2022
Last updated in NPPES Aug 30, 2022
Taxonomy & licenses
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 020.012472 | Medicaid | IL | - |
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.
Frequently asked questions
What specialty is Martha Tobias-Contreras?
Martha Tobias-Contreras is registered in NPPES with the primary taxonomy of Dental Hygienist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
Other providers at this practice address
Browse all → City of Chicago Community Health Clinic/Center · Chicago, IL NPI 1871595256 Chicago Department of Public Health Mental Health Clinic/Center (Including Community Mental Health Center) · Chicago, IL NPI 1568454700 Marc Rosenthal General Practice Dentistry · Chicago, IL NPI 1992794598 David Maclin General Practice Dentistry · Chicago, IL NPI 1871711747 Jenine Chiles Clinical Psychologist · Chicago, IL NPI 1316168412 Carolyn Paige Adult Health Nurse Practitioner · Chicago, IL NPI 1942499983 Kinnari Patel General Practice Dentistry · Chicago, IL NPI 1912184664 Heartland Health Outreach General Practice Dentistry · Chicago, IL NPI 1720245491
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-08-30.