Adrienne Fregia, MD
NPI 1477653111 · Gastroenterology Physician · Olympia Fields, IL
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Adrienne Fregia, MD is a Gastroenterology Physician provider in Olympia Fields, IL (NPI 1477653111).
Provider details
- NPI number
- 1477653111
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- Yes
- License
- 036081708 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Other Service Providers
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
486 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 180 | $132 |
| Biopsy of Large Bowel Using a Flexible Endoscope45380 | 96 | $162 |
| New Patient Office Or Other Outpatient Visit With Straightforward Medical Decision Making, If Using Time, 15 Minutes Or More99202 | 55 | $74 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 38 | $100 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 32 | $114 |
| Diagnostic Exam of Large Bowel Using a Flexible Endoscope |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 9 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Pantoprazole Sodium | 218 | 65 |
| Famotidine | 160 | 52 |
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Gavilyte-G | 105 | 101 |
| Omeprazole | 72 | 23 |
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Peg-3350 and Electrolytes | 58 | 54 |
| Rabeprazole Sodium | 19 | — |
| Mesalamine | 18 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$370 across 9 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (2)
- 4647 Lincoln HwyMatteson, IL 60443-2319Phone: (708) 481-9912Fax: (708) 481-9914
- 4647 Lincoln HwyMatteson, IL 60443-2319Phone: (708) 481-9912Fax: (708) 481-9914
Registry dates
- Enumerated
- 2006-09-23
- Last updated
- 2022-07-18
- Certified
- 2022-07-18
Frequently asked questions
- What is Adrienne Fregia's NPI number?
- Adrienne Fregia's National Provider Identifier (NPI) is 1477653111, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Adrienne Fregia's specialty?
- Adrienne Fregia is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Adrienne Fregia located?
- Adrienne Fregia's practice location on file with NPPES is 3700 W 203rd St Ste 201, Olympia Fields, IL 60461-1182.
- What is Adrienne Fregia's phone number?
- The practice phone number listed in the NPPES registry for Adrienne Fregia is (708) 679-2380.
- Does Adrienne Fregia accept Medicare?
- Adrienne Fregia is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Adrienne Fregia's NPI active?
- Yes — Adrienne Fregia's NPI (1477653111) is active in the NPPES registry as of the last update on 2022-07-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.