Ya-Yu Lee, MD
NPI 1235271545 · Endocrinology, Diabetes & Metabolism Physician · Allentown, PA
Enrolled with Medicare as Practitioner - Endocrinology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ya-Yu Lee, MD is a Endocrinology, Diabetes & Metabolism Physician provider in Allentown, PA (NPI 1235271545).
Provider details
- NPI number
- 1235271545
- Entity type
- Individual
- Primary specialty
- Endocrinology, Diabetes & Metabolism PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- MD430220 (PA)
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
19 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
1,728 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 | 783 | $121 |
| Injection of Drug Or Substance Under Skin Or Into Muscle96372 | 630 | $13 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 116 | $73 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 61 | $159 |
| Infusion Into a Vein for Therapy, Prevention, Or Diagnosis, 1 Hour Or Less96365 | 57 | $58 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 39 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 523 | 150 |
| Alendronate Sodium | 256 | 89 |
| Levothyroxine Sodiumbrand: Synthroid | 144 | 46 |
| Metformin Hcl | 138 | 48 |
| Dulaglutidebrand: Trulicity | 101 | 17 |
| Semaglutidebrand: Ozempic | 96 | 25 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$232 across 2 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
- 2007-02-13
- Last updated
- 2015-11-18
Frequently asked questions
- What is Ya-Yu Lee's NPI number?
- Ya-Yu Lee's National Provider Identifier (NPI) is 1235271545, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ya-Yu Lee's specialty?
- Ya-Yu Lee is listed in the NPPES registry with a primary specialty of Endocrinology, Diabetes & Metabolism Physician (Allopathic & Osteopathic Physicians).
- Where is Ya-Yu Lee located?
- Ya-Yu Lee's practice location on file with NPPES is 1243 S Cedar Crest Blvd, Allentown, PA 18103-6268.
- What is Ya-Yu Lee's phone number?
- The practice phone number listed in the NPPES registry for Ya-Yu Lee is (610) 402-6790.
- Does Ya-Yu Lee accept Medicare?
- Ya-Yu Lee is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ya-Yu Lee's NPI active?
- Yes — Ya-Yu Lee's NPI (1235271545) is active in the NPPES registry as of the last update on 2015-11-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.