Donald Messersmith, MD
NPI 1538235338 · Cardiovascular Disease Physician · Merritt Island, FL
Enrolled with Medicare as Practitioner - Cardiovascular Disease (cardiology) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Donald Messersmith, MD is a Cardiovascular Disease Physician provider in Merritt Island, FL (NPI 1538235338).
Provider details
- NPI number
- 1538235338
- Entity type
- Individual
- Primary specialty
- Cardiovascular Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- ME45550 (FL)
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
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
3,305 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 | 1,805 | $124 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 | 738 | $14 |
| Ultrasound of Heart With Color-Depicted Blood Flow, Rate, Direction and Valve Function93306 | 312 | $185 |
| Blood Test, Clotting Time85610 | 160 | $4 |
| Anticoagulant Management of Patient Taking Warfarin93793 | 155 | $11 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 64 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Metoprolol Succinate | 786 | 250 |
| Rosuvastatin Calcium | 780 | 251 |
| Amlodipine Besylate | 730 | 237 |
| Apixabanbrand: Eliquis | 635 | 169 |
| Atorvastatin Calcium | 502 | 157 |
| Carvedilol | 502 | 147 |
| Ezetimibe | 458 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$149 across 9 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
- 2006-11-27
- Last updated
- 2025-03-10
- Certified
- 2025-03-10
Frequently asked questions
- What is Donald Messersmith's NPI number?
- Donald Messersmith's National Provider Identifier (NPI) is 1538235338, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Donald Messersmith's specialty?
- Donald Messersmith is listed in the NPPES registry with a primary specialty of Cardiovascular Disease Physician (Allopathic & Osteopathic Physicians).
- Where is Donald Messersmith located?
- Donald Messersmith's practice location on file with NPPES is 150 N Sykes Creek Pkwy, Merritt Island, FL 32953-3488.
- What is Donald Messersmith's phone number?
- The practice phone number listed in the NPPES registry for Donald Messersmith is (321) 452-3811.
- Does Donald Messersmith accept Medicare?
- Donald Messersmith is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Donald Messersmith's NPI active?
- Yes — Donald Messersmith's NPI (1538235338) is active in the NPPES registry as of the last update on 2025-03-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.