DR MARY TILAK PC
DR MARY TILAK PC is an organization registered with the National Plan and Provider Enumeration System (NPPES) under NPI 1003096900, based in Munster, IN. It is classified under Obesity Medicine (Internal Medicine) Physician.
Getting there
Here is what surrounds this office in Munster, based on OpenStreetMap data collected Sep 5, 2026. Parking is available about 0.52 mi away. A pharmacy sits 0.48 mi from the entrance (Walgreens), which helps if you leave with a prescription. If you arrive early, there is a coffee shop 739 ft away.
Getting here and what is nearby
Restaurant Red Lobster 241 ft ~1 min
Hotel Hyatt Place Munster 589 ft ~3 min
Convenience Marathon 699 ft ~3 min
9451 Calumet Avenue, Munster 46321
Coffee Starbucks 739 ft ~3 min
9150 Calumet Avenue, Munster 46321
Mo-Fr 04:30-21:00; Sa-Su 05:00-21:00
Gas station Marathon 731 ft ~3 min
9451 Calumet Avenue, Munster 46321
Restaurant Potbelly 854 ft ~4 min
9148 Calumet Avenue, Munster 46321
Mo-Fr 08:00-22:00; Sa-Su 09:00-22:00
Restaurant Noodles & Company 0.21 mi ~5 min
9140 Calumet Avenue, Munster 46321
Su-We 10:30-21:00; Th-Sa 10:30-22:00
Gas station Speedway 0.33 mi ~7 min
Convenience Speedway 0.35 mi ~7 min
Parking 0.39 mi ~8 min
Hotel SpringHill Suites Munster 0.44 mi ~9 min
Hotel Hampton Inn & Suites Munster 0.47 mi ~10 min
Pharmacy Walgreens 0.48 mi ~10 min
Parking 0.50 mi ~11 min
Parking 0.52 mi ~11 min
Distances are straight‑line estimates — walking routes may be longer. Hours and phone numbers can change; call ahead to confirm.
Credentials and Medicare
NPPES does not list a state licence number for this record. That is not unusual — organizations and some provider types are not required to file one. Verify current licensure with the relevant state board before care.
- Status
- Approved
- Provider type
- Part B Supplier - Clinic/group Practice
- PAC ID
- 1951490390
- Enrollment ID
- O20071207000544
Medicare enrolment is recorded as approved under the provider type Part B Supplier - Clinic/group Practice. Being enrolled means the provider can bill Medicare; it does not tell you whether they are currently accepting new Medicare patients. Call the office to confirm.
What Obesity Medicine covers
A physician who specializes in the treatment of obesity demonstrates competency in and a thorough understanding of the treatment of obesity and the genetic, biologic, environmental, social, and behavioral factors that contribute to obesity. The obesity medicine physician employs therapeutic interventions including diet, physical activity, behavioral change, and pharmacotherapy. The obesity medicine physician utilizes a comprehensive approach, and may include additional resources such as dietitians, exercise physiologists, mental health professionals and bariatric surgeons as indicated to achieve optimal results. Additionally, the obesity medicine physician maintains competency in providing pre- peri- and post-surgical care of bariatric surgery patients, promotes the prevention of obesity, and advocates for those who suffer from obesity. NUCC Health Care Provider Taxonomy, code 207RB0002X
The taxonomy records how the provider classifies their own practice. It does not confirm which conditions they currently treat, whether they are accepting new patients, or which insurance they take — call the office for that.
Full NPPES record
An NPI-2 identifies an organization — a clinic, hospital, group practice, laboratory, or supplier. Individual clinicians working there hold their own NPI-1 numbers separately, so a bill may reference both.
| NPI | 1003096900 valid check digit |
|---|---|
| Entity type | Organization (NPI-2) |
| Enumeration date | Nov 7, 2007 |
| Last updated | Apr 24, 2026 |
| Status | Active |
| Practice address |
9410 CALUMET AVE STE 101 Munster, IN 46321 (219) 922-8051 Fax (219) 922-8608 |
| Mailing address |
PO BOX 736895 Chicago, IL 60673 |
| Other identifiers |
000000541656
· Other (IN) 90001352 · Other (IL) |
Number check
How the check works, step by step
Every NPI carries a Luhn check digit — the same scheme used on credit cards. CMS prefixes the number with 80840 before computing it, which marks it as a US health identifier.
| Digit | 8 | 0 | 8 | 4 | 0 | 1 | 0 | 0 | 3 | 0 | 9 | 6 | 9 | 0 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 0 | 9 | 3 | 9 | 0 |
Sum = 50 · next multiple of 10 = 50 · check digit = 0 · actual last digit = 0
A valid check digit only means the number is well-formed. It does not mean the provider is licensed, active, or in good standing — those are separate questions answered by the sections above.