Sara Elizabeth Yap, MD
NPI 1225514334 · Endocrinology, Diabetes & Metabolism Physician · Bourbonnais, IL
Enrolled with Medicare as Practitioner - Endocrinology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Sara Elizabeth Yap, MD is a Endocrinology, Diabetes & Metabolism Physician provider in Bourbonnais, IL (NPI 1225514334).
Provider details
- NPI number
- 1225514334
- Entity type
- Individual
- Primary specialty
- Endocrinology, Diabetes & Metabolism PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 036162611 (IL)
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 tenure25% of score
7 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
676 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 | 312 | $93 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 125 | $16 |
| Continuous Monitoring of Blood Sugar Level in Tissue Fluid Using Sensor Under Skin With Interpretation and Report95251 | 120 | $33 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 62 | $130 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 34 | $64 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 27 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 119 | 35 |
| Insulin Glargine,hum.rec.anlogbrand: Lantus Solostar | 99 | 39 |
| Dulaglutidebrand: Trulicity | 80 | 22 |
| Pen Needle, Diabeticbrand: Nano 2nd Gen Pen Needle | 57 | 27 |
| Empagliflozinbrand: Jardiance | 54 | 20 |
| Insulin Lisprobrand: Humalog Kwikpen U-100 | 52 | 23 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$141 across 6 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
- 2018-07-12
- Last updated
- 2023-09-08
- Certified
- 2023-09-08
Frequently asked questions
- What is Sara Elizabeth Yap's NPI number?
- Sara Elizabeth Yap's National Provider Identifier (NPI) is 1225514334, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Sara Elizabeth Yap's specialty?
- Sara Elizabeth Yap is listed in the NPPES registry with a primary specialty of Endocrinology, Diabetes & Metabolism Physician (Allopathic & Osteopathic Physicians).
- Where is Sara Elizabeth Yap located?
- Sara Elizabeth Yap's practice location on file with NPPES is 100 Fitness Dr, Bourbonnais, IL 60914-9584.
- What is Sara Elizabeth Yap's phone number?
- The practice phone number listed in the NPPES registry for Sara Elizabeth Yap is (815) 936-8909.
- Does Sara Elizabeth Yap accept Medicare?
- Sara Elizabeth Yap is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Sara Elizabeth Yap's NPI active?
- Yes — Sara Elizabeth Yap's NPI (1225514334) is active in the NPPES registry as of the last update on 2023-09-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.