Mary Schaefer, ANP-C
NPI 1558649244 · Adult Health Nurse Practitioner · Southampton, NY
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mary Schaefer, ANP-C is a Adult Health Nurse Practitioner provider in Southampton, NY (NPI 1558649244).
Provider details
- NPI number
- 1558649244
- Entity type
- Individual
- Primary specialty
- Adult Health Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- ANP-C
- Sex
- Female
- Sole proprietor
- No
- License
- 305771 (NY)
Specialties & taxonomies
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
14 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
2,064 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 Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99309 | 1,662 | $102 |
| Subsequent Nursing Facility Care With Straightforward Level of Medical Decision Making, Per Day, If Using Time, 20 Minutes Or More99308 | 280 | $71 |
| Advance Care Planning, First 30 Minutes99497 | 59 | $71 |
| Nursing Facility Discharge Management, More Than 30 Minutes99316 | 45 | $124 |
| Subsequent Nursing Facility Care With Straightforward Level of Medical Decision Making, Per Day, If Using Time, at Least 10 Minutes99307 | 18 | $38 |
Typical Medicare-allowed amounts for these services range $38–$124 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, 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 · 110 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Apixabanbrand: Eliquis | 316 | 32 |
| Levothyroxine Sodium | 181 | 33 |
| Amlodipine Besylate | 161 | 31 |
| Trazodone Hcl | 160 | 25 |
| Furosemide | 150 | 31 |
| Metoprolol Succinate | 130 | 23 |
| Quetiapine Fumarate |
Practice location
Mailing address
Registry dates
- Enumerated
- 2011-07-28
- Last updated
- 2011-07-28
Frequently asked questions
- What is Mary Schaefer's NPI number?
- Mary Schaefer's National Provider Identifier (NPI) is 1558649244, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Schaefer's specialty?
- Mary Schaefer is listed in the NPPES registry with a primary specialty of Adult Health Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Mary Schaefer located?
- Mary Schaefer's practice location on file with NPPES is 4 Millstone Dr, Southampton, NY 11968-5613.
- What is Mary Schaefer's phone number?
- The practice phone number listed in the NPPES registry for Mary Schaefer is (631) 374-0534.
- Does Mary Schaefer accept Medicare?
- Mary Schaefer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mary Schaefer's NPI active?
- Yes — Mary Schaefer's NPI (1558649244) is active in the NPPES registry as of the last update on 2011-07-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.