Dr Mary Tilak PC
Dr Mary Tilak PC is a healthcare organization registered as Obesity Medicine (Internal Medicine) Physician in Munster, IN, holding Type 2 (organization) NPI 1003096900 since 2007. The authorized official on file is Mary Tilak, President.
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1003096900 |
|---|---|
| Entity type | Organization (Type 2) |
| Legal business name | Dr Mary Tilak PC |
| Practice address | 9410 CALUMET AVE STE 101, Munster, IN, 46321 |
| Phone | 2199228051 |
| Fax | 2199228608 |
| Enumeration date | 2007-11-07 |
| Last updated in NPPES | 2026-04-24 |
Authorized official
| Name | Mary Tilak |
|---|---|
| Title | President |
| Phone | 2199228051 |
Taxonomy & classification
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 207RB0002X | Obesity Medicine (Internal Medicine) Physician | Primary | — | — |
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 000000541656 | Other | IN | ANTHEM |
| 90001352 | Other | IL | BC/BS |
Copy-ready billing details
Provider: Dr Mary Tilak PC NPI: 1003096900 Taxonomy: 207RB0002X (Obesity Medicine (Internal Medicine) Physician) Address: 9410 CALUMET AVE STE 101, Munster, IN, 46321
Providers at this address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1942908223 | Lorrie Ozinga | Individual | Gerontology Nurse Practitioner | Munster, IN |
| 1013765056 | Konstantina Gardikiotes | Individual | Family Nurse Practitioner | Munster, IN |
| 1285461822 | Stephanie Penacho | Individual | Psychiatric/Mental Health Nurse Practitioner | Munster, IN |
| 1437943388 | Emily Hensley | Individual | Physician Assistant | Munster, IN |
| 1659261279 | Melyn Mabunay | Individual | Family Nurse Practitioner | Munster, IN |
Verify this record
Cross-check NPI 1003096900 against the authoritative CMS record: view Dr Mary Tilak PC on the official NPPES registry .
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. Read the full guide or validate an NPI number.
Frequently asked questions
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Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2026-04-24.