Steven Mackay, PA-C
NPI 1508300187 · Physician Assistant · Jacksonville, FL
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Steven Mackay, PA-C is a Physician Assistant provider in Jacksonville, FL (NPI 1508300187).
Provider details
- NPI number
- 1508300187
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PA-C
- Sex
- Male
- Sole proprietor
- No
- License
- MA058623 (PA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Physician Assistants & Advanced Practice Nursing Providers
- Medical Physician Assistant363AM0700X
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
9 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
57 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) |
|---|---|---|
| Critical Care, First 30-74 Minutes99291 | 37 | $178 |
| Insertion of Artery Tube for Blood Sampling Or Infusion Through Skin36620 | 20 | $37 |
Typical Medicare-allowed amounts for these services range $37–$178 (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
- 2016-12-15
- Last updated
- 2022-04-08
- Certified
- 2022-04-08
Frequently asked questions
- What is Steven Mackay's NPI number?
- Steven Mackay's National Provider Identifier (NPI) is 1508300187, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Steven Mackay's specialty?
- Steven Mackay is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Steven Mackay located?
- Steven Mackay's practice location on file with NPPES is 4500 San Pablo Rd S, Jacksonville, FL 32224-1865.
- What is Steven Mackay's phone number?
- The practice phone number listed in the NPPES registry for Steven Mackay is (904) 953-2000.
- Does Steven Mackay accept Medicare?
- Steven Mackay is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Steven Mackay's NPI active?
- Yes — Steven Mackay's NPI (1508300187) is active in the NPPES registry as of the last update on 2022-04-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.