Lydia Sun, M.D.
NPI 1578744041 · Internal Medicine Physician · Lawrenceville, NJ
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Lydia Sun, M.D. is a Internal Medicine Physician provider in Lawrenceville, NJ (NPI 1578744041).
Provider details
- NPI number
- 1578744041
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- MA72880 (NJ)
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
18 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
1,116 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) |
|---|---|---|
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 64 | $9 |
| Cortisol (hormone) Measurement, Total82533 | 64 | $16 |
| Dehydroepiandrosterone (dhea-S) Hormone Level82627 | 64 | $22 |
| Measurement of Total Estradiol (hormone)82670 | 64 | $27 |
| Gonadotropin, Follicle Stimulating (reproductive Hormone) Level83001 | 64 | $18 |
| Gonadotropin, Luteinizing (reproductive Hormone) Level83002 | 64 | $18 |
| Insulin Measurement, Total |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 3 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Progesterone, Micronizedbrand: Progesterone | 19 |
| Levothyroxine Sodium | 15 |
| Liothyronine Sodium | 13 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$17 across 1 record (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
- 2007-11-26
- Last updated
- 2010-07-07
Frequently asked questions
- What is Lydia Sun's NPI number?
- Lydia Sun's National Provider Identifier (NPI) is 1578744041, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Lydia Sun's specialty?
- Lydia Sun is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Lydia Sun located?
- Lydia Sun's practice location on file with NPPES is 3131 Princeton Pike, Lawrenceville, NJ 08648-2201.
- What is Lydia Sun's phone number?
- The practice phone number listed in the NPPES registry for Lydia Sun is (609) 895-1230.
- Does Lydia Sun accept Medicare?
- Lydia Sun is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Lydia Sun's NPI active?
- Yes — Lydia Sun's NPI (1578744041) is active in the NPPES registry as of the last update on 2010-07-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.