James Mersey, M.D.
NPI 1669477683 · Endocrinology, Diabetes & Metabolism Physician · The Villages, FL
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
James Mersey, M.D. is a Endocrinology, Diabetes & Metabolism Physician provider in The Villages, FL (NPI 1669477683).
Provider details
- NPI number
- 1669477683
- Entity type
- Individual
- Primary specialty
- Endocrinology, Diabetes & Metabolism PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- D19329 (MD)
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
21 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
584 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) |
|---|---|---|
| Ultrasound Scan of Head and Neck Soft Tissue76536 | 238 | $109 |
| Dxa Bone Density Measurement of Hip, Pelvis, Spine77080 | 133 | $39 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 83 | $131 |
| Dxa Bone Density Measurement of Hip, Pelvis, Spine Including Spine Fracture Assessment77085 | 55 | $54 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 29 | $8 |
| Hemoglobin A1c Level83036 | 19 | $10 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 17 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 112 | 50 |
| Levothyroxine Sodiumbrand: Synthroid | 62 | 21 |
| Semaglutidebrand: Ozempic | 42 | 20 |
| Metformin Hcl | 32 | 20 |
| Insulin Glargine,hum.rec.anlogbrand: Toujeo Solostar | 25 | 17 |
| Insulin Lisprobrand: Humalog Kwikpen U-100 | 22 | 11 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,527 across 28 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)
- 1400 N US Highway 441Suite 810The Villages, FL 32159-8975Phone: (352) 674-8700Fax: (352) 674-8714
- 1451 El Camino RealThe Villages, FL 32159-0041Phone: (352) 751-8000
Registry dates
- Enumerated
- 2005-06-16
- Last updated
- 2025-08-18
- Certified
- 2025-08-18
Frequently asked questions
- What is James Mersey's NPI number?
- James Mersey's National Provider Identifier (NPI) is 1669477683, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is James Mersey's specialty?
- James Mersey is listed in the NPPES registry with a primary specialty of Endocrinology, Diabetes & Metabolism Physician (Allopathic & Osteopathic Physicians).
- Where is James Mersey located?
- James Mersey's practice location on file with NPPES is 2955 Brownwood Blvd, The Villages, FL 32163-2039.
- What is James Mersey's phone number?
- The practice phone number listed in the NPPES registry for James Mersey is (352) 674-8700.
- Does James Mersey accept Medicare?
- James Mersey is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is James Mersey's NPI active?
- Yes — James Mersey's NPI (1669477683) is active in the NPPES registry as of the last update on 2025-08-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.