Gregory Mackay, M.D.
NPI 1346277613 · Gastroenterology Physician · Vero Beach, FL
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gregory Mackay, M.D. is a Gastroenterology Physician provider in Vero Beach, FL (NPI 1346277613).
Provider details
- NPI number
- 1346277613
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- ME 60347 (FL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
22 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 22 | $81 |
Typical Medicare-allowed amounts for these services range $81–$81 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-06-26
- Last updated
- 2018-01-22
Frequently asked questions
- What is Gregory Mackay's NPI number?
- Gregory Mackay's National Provider Identifier (NPI) is 1346277613, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregory Mackay's specialty?
- Gregory Mackay is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Gregory Mackay located?
- Gregory Mackay's practice location on file with NPPES is 3745 11th Cir, Vero Beach, FL 32960-4837.
- What is Gregory Mackay's phone number?
- The practice phone number listed in the NPPES registry for Gregory Mackay is (772) 299-3211.
- Does Gregory Mackay accept Medicare?
- Gregory Mackay is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gregory Mackay's NPI active?
- Yes — Gregory Mackay's NPI (1346277613) is active in the NPPES registry as of the last update on 2018-01-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.