Mark St John, FNP
NPI 1295999266 · Nurse Practitioner · Baldwinsville, NY
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark St John, FNP is a Nurse Practitioner provider in Baldwinsville, NY (NPI 1295999266).
Provider details
- NPI number
- 1295999266
- Entity type
- Individual
- Primary specialty
- Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- FNP
- Sex
- Male
- Sole proprietor
- No
- License
- F335622 (NY)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
17 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
529 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) |
|---|---|---|
| Subsequent Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99309 | 413 | $86 |
| Subsequent Nursing Facility Care With Straightforward Level of Medical Decision Making, Per Day, If Using Time, 20 Minutes Or More99308 | 60 | $60 |
| Nursing Facility Discharge Management, More Than 30 Minutes99316 | 56 | $105 |
Typical Medicare-allowed amounts for these services range $60–$105 (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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 104 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Sertraline Hcl | 382 | 46 |
| Levothyroxine Sodium | 263 | 48 |
| Amlodipine Besylate | 246 | 30 |
| Atorvastatin Calcium | 222 | 59 |
| Gabapentin | 222 | 42 |
| Furosemide | 200 | 41 |
| Apixabanbrand: Eliquis |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$14 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
- 2008-07-17
- Last updated
- 2020-09-04
- Certified
- 2020-09-04
Frequently asked questions
- What is Mark St John's NPI number?
- Mark St John's National Provider Identifier (NPI) is 1295999266, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark St John's specialty?
- Mark St John is listed in the NPPES registry with a primary specialty of Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Mark St John located?
- Mark St John's practice location on file with NPPES is 7740 Meigs Rd, Baldwinsville, NY 13027-9757.
- What is Mark St John's phone number?
- The practice phone number listed in the NPPES registry for Mark St John is (315) 638-2521.
- Does Mark St John accept Medicare?
- Mark St John is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark St John's NPI active?
- Yes — Mark St John's NPI (1295999266) is active in the NPPES registry as of the last update on 2020-09-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.