Natalie Opanasets, M.D.
NPI 1366615833 · Family Medicine Physician · Michigan City, IN
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Natalie Opanasets, M.D. is a Family Medicine Physician provider in Michigan City, IN (NPI 1366615833).
Provider details
- NPI number
- 1366615833
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 01069068A (IN)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
18 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
8 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
455 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 187 | $84 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 47 | $118 |
| Amplifed Dna Or Rna Probe Detection of Severe Acute Respiratory Syndrome Coronavirus 2 (covid-19) Antigen87635 | 46 | $50 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 41 | $104 |
| X-Ray of Chest, 2 Views71046 | 38 | $31 |
| Urinalysis, Manual Test81002 | 32 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 19 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Prednisone | 191 | 185 |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 71 | 70 |
| Cephalexin | 52 | 51 |
| Doxycycline Monohydrate | 47 | 47 |
| Azithromycin | 36 | 36 |
| Tizanidine Hcl | 27 | 26 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 27 | 27 |
Practice location
Mailing address
Additional practice locations (7)
- 5841 S Maryland AveChicago, IL 60637-1443Phone: (888) 824-0200
- 47 W Polk St Ste G1Chicago, IL 60605-2083Phone: (888) 824-0200
- 650 Dickinson RdChesterton, IN 46304-3387Phone: (219) 926-7755Fax: (219) 929-1885
- 401 Newporte BlvdLa Porte, IN 46350-4099Phone: (219) 575-6244
- 3777 N Frontage Rd Ste 500Michigan City, IN 46360-7697Phone: (219) 809-2889
- 3630 Willowcreek RdPortage, IN 46368-5075Phone: (219) 364-3900Fax: (219) 364-3595
- 809 Laporte Ave Ste BValparaiso, IN 46383-5801Phone: (219) 263-4977Fax: (219) 263-4979
Registry dates
- Enumerated
- 2008-04-07
- Last updated
- 2025-03-14
- Certified
- 2025-03-14
Frequently asked questions
- What is Natalie Opanasets's NPI number?
- Natalie Opanasets's National Provider Identifier (NPI) is 1366615833, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Natalie Opanasets's specialty?
- Natalie Opanasets is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Natalie Opanasets located?
- Natalie Opanasets's practice location on file with NPPES is 4111 Franklin St, Michigan City, IN 46360-7803.
- What is Natalie Opanasets's phone number?
- The practice phone number listed in the NPPES registry for Natalie Opanasets is (219) 873-2919.
- Does Natalie Opanasets accept Medicare?
- Natalie Opanasets is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Natalie Opanasets's NPI active?
- Yes — Natalie Opanasets's NPI (1366615833) is active in the NPPES registry as of the last update on 2025-03-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.