Rockford Yapp, M.D., M.P.H.
NPI 1356327910 · Gastroenterology Physician · Downers Grove, IL
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Rockford Yapp, M.D., M.P.H. is a Gastroenterology Physician provider in Downers Grove, IL (NPI 1356327910).
Provider details
- NPI number
- 1356327910
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D., M.P.H.
- Sex
- Male
- Sole proprietor
- No
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
83% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
1,158 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 Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 323 | $92 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 141 | $90 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 138 | $130 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 126 | $80 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 72 | $116 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 25 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Omeprazole | 522 | 194 |
| Sodium, Potassium,mag Sulfatesbrand: Sod Sulf-Potass Sulf-Mag Sulf | 135 | 131 |
| Pantoprazole Sodium | 84 | 29 |
| Esomeprazole Magnesium | 78 | 34 |
| Linaclotidebrand: Linzess | 58 | 18 |
| Mesalamine | 50 | 12 |
| Lansoprazole | 45 | 15 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$85,174 across 233 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
Registry dates
- Enumerated
- 2005-12-15
- Last updated
- 2007-07-08
Frequently asked questions
- What is Rockford Yapp's NPI number?
- Rockford Yapp's National Provider Identifier (NPI) is 1356327910, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Rockford Yapp's specialty?
- Rockford Yapp is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Rockford Yapp located?
- Rockford Yapp's practice location on file with NPPES is 3825 Highland Ave, Downers Grove, IL 60515-1552.
- What is Rockford Yapp's phone number?
- The practice phone number listed in the NPPES registry for Rockford Yapp is (630) 434-9312.
- Does Rockford Yapp accept Medicare?
- Rockford Yapp is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Rockford Yapp's NPI active?
- Yes — Rockford Yapp's NPI (1356327910) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.