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MARY ELLEN SCHAEFER ANP-C
NPI 1558649244
Nurse Practitioner - Adult Health in Southampton, NY

Active since July 28, 2011PECOS Enrolled
4 MILLSTONE DR, SOUTHAMPTON, NY 11968(631) 374-0534 Get Directions Write a Review

NPPES record last updated: July 28, 2011. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Mary Ellen Schaefer Anp-c NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MARY ELLEN SCHAEFER ANP-C (NPI 1558649244) is an individual adult health provider in Southampton, New York, licensed in New York (305771) and active in the NPI registry since July 2011. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1558649244
Entity TypeIndividualFemale
Primary Taxonomy363LA2200X
Provider Legal NameMARY ELLEN SCHAEFERCredential: ANP-C
Location Address4 MILLSTONE DRSouthampton, NY 11968-5613
Mailing Address4 Millstone DrSouthampton, NY 11968-5613 · (631) 374-0534
Phone(631) 374-0534
Sole ProprietorNo
Enumeration DateJuly 28, 2011
✔ NPI 1558649244 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNurse Practitioner · Adult HealthPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363LA2200X
License✔ Licensed in NY · 305771
4 MILLSTONE DR, Southampton, NY 11968
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Mary Ellen Schaefer Anp-c is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

4

Medicare enrollment records show Mary Schaefer reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Hospitalist Healthcare Services PLLC
71 mi
Internal Medicine
3 BARKER AVE
White Plains, NY 10601
  • Reassigned Medicare billing, New York enrollment
  • 167 clinicians in this Medicare group
NPI 1275962011 (914) 949-1199
New York General Medical Services PC
82 mi
Hospitalist
1060 AMSTERDAM AVE
New York, NY 10025
  • Reassigned Medicare billing, New York enrollment
  • 179 clinicians in this Medicare group
NPI 1700315538 (865) 693-1000
Cs Pacs 3 Northeast, LLC
285 mi
Hospitalist
30 NORTH PL
Frederick, MD 21701
  • Reassigned Medicare billing, New York enrollment
  • 158 clinicians in this Medicare group
NPI 1093598898 (301) 695-6618
Nv Pacs 2 LLC
2,324 mi
Hospitalist
10550 PARK RUN DR
Las Vegas, NV 89144
  • Reassigned Medicare billing, New York enrollment
  • 178 clinicians in this Medicare group
NPI 1427534809 (865) 693-1000

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 5

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes 99309
A follow-up nursing facility visit per day is a daily check-in by a healthcare professional. This 25-minute visit typically involves monitoring your health progress, addressing any concerns, and adjusting treatment plans as necessary. It's a vital part of ensuring your ongoing wellbeing.
1,662 services202 patients
Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, 20 minutes or more 99308
A follow-up nursing facility visit per day is a daily check-up service provided by healthcare professionals. It lasts around 15 minutes and involves assessing your health status, monitoring your recovery progress, and addressing any concerns you may have about your health or treatment.
280 services111 patients
Advance care planning, first 30 minutes 99497
Advance care planning is a process where you discuss your healthcare preferences with your doctor. This conversation, lasting up to 30 minutes, helps ensure your wishes are respected if you're unable to communicate them in the future. It's about your care, your way.
59 services47 patients
Nursing facility discharge management, more than 30 minutes 99316
Nursing facility discharge management over 30 minutes is a comprehensive process where a healthcare team prepares you for leaving the facility. It involves creating a tailored plan, coordinating care, and ensuring a smooth transition to your next care setting.
45 services43 patients
Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least 10 minutes 99307
A follow-up nursing facility visit per day typically lasts about 10 minutes. This service involves a healthcare professional checking on your health status, answering any questions you may have, and monitoring your progress. This routine check ensures your recovery is on track and any concerns are addressed promptly.
18 services18 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 11968 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$105.06 typical visit price
range $67.40 – $203.53
Typical copayment $26.26 (range $16.85 – $50.88)
Most-billed visit code 99203
Established Patient
$117.62 typical visit price
range $21.66 – $164.45
Typical copayment $29.40 (range $5.41 – $41.11)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

Reported Quality Measures

Care Plan
Percentage of patients aged 65 years and older who have an advance care plan or surrogate decision maker documented in the medical record that an advance care plan was discussed but the patient did not wish or was not able to name a surrogate decision maker…
100%177 patients5/55-star benchmark: 100%
Providers report different measures because they deliver different services; reporting more or less information is not a reflection of quality. Star ratings appear only where CMS assigned them.

Referred Medical Equipment & Supplies CMS DME claims 5

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Insertion tray with drainage bag with indwelling catheter, foley type, two-way latex with coating (teflon, silicone, silicone elastomer or hydrophilic, etc.) A4314
DME-Orthotic Devices · category DF000N
1 supplier69 claims69 services$23.48 avg. paid by Medicare
Bedside drainage bag, day or night, with or without anti-reflux device, with or without tube, each A4357
DME-Orthotic Devices · category DF000N
1 supplier74 claims74 services$9.25 avg. paid by Medicare
Enteral feeding supply kit; pump fed, per day, includes but not limited to feeding/flushing syringe, administration set tubing, dressings, tape B4035
Other-Enteral and Parenteral · category OB006N
1 supplier18 claims504 services$4.24 avg. paid by Medicare
Enteral formula, nutritionally complete, calorically dense (equal to or greater than 1.5 kcal/ml) with intact nutrients, includes proteins, fats, carbohydrates, vitamins and minerals, may include fiber, administered through an enteral feeding tube, 100 calories = 1 unit B4152
Other-Enteral and Parenteral · category OB006N
2 suppliers19 claims11,874 services$0.27 avg. paid by Medicare
Enteral nutrition infusion pump, any type B9002
Other-Enteral and Parenteral · category OB005N
1 supplier14 claims14 services$52.19 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Mary Schaefer's NPI number?

The NPI number for Mary Schaefer is 1558649244. It was assigned to this individual provider in the NPPES registry on July 28, 2011.

Where is Mary Schaefer located?

Mary Schaefer practices at 4 Millstone Dr, Southampton, NY 11968. The listed phone number is (631) 374-0534.

What is Mary Schaefer's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Adult Health, with taxonomy code 363LA2200X.

Is Mary Schaefer enrolled in Medicare?

Yes. Mary Schaefer is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Mary Schaefer's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mary Schaefer reassigns Medicare benefits to 4 organizations: Hospitalist Healthcare Services PLLC (White Plains, NY), New York General Medical Services PC (New York, NY), Cs Pacs 3 Northeast, LLC (Frederick, MD) and Nv Pacs 2 LLC (Las Vegas, NV). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Mary Schaefer's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Mary Schaefer was last updated on July 28, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.