MARY ANN FIEFFER APRN, RN
NPI 1932147675
Nurse Practitioner - Family in New Haven, CT

Q: What is Mary Ann Fieffer's NPI number?

The NPI number for Mary Ann Fieffer is 1932147675. It was assigned to this individual provider in the NPPES registry on June 3, 2006.

Q: What is Mary Ann Fieffer's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.

Q: When was this NPI record last updated?

The NPPES record for Mary Ann Fieffer was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 months 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.

Active since June 03, 2006PECOS Enrolled

800 HOWARD AVE, YALE PHYSICIANS BLDG, NEW HAVEN, CT 06519(203) 785-2140(203) 785-6414 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

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About Mary Ann Fieffer Aprn, Rn NPPES

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

MARY ANN FIEFFER APRN, RN (NPI 1932147675) is an individual family provider in New Haven, Connecticut, licensed in Connecticut (003167) and active in the NPI registry since June 2006. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1932147675

Entity TypeIndividualFemale

Primary Taxonomy363LF0000X

Provider Legal NameMARY ANN FIEFFERCredential: APRN, RN

Location Address800 HOWARD AVE, YALE PHYSICIANS BLDGNew Haven, CT 06519-1369

Mailing Address300 George St, Po Box 9805New Haven, CT 06511-6624 · (203) 785-7998 · Fax (203) 785-6414

Phone(203) 785-2140

Fax(203) 785-6414

Sole ProprietorNo

Enumeration DateJune 3, 2006

Last NPPES UpdateJuly 13, 2026

✔ NPI 1932147675 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNurse Practitioner · FamilyPhysician Assistants & Advanced Practice Nursing Providers

Taxonomy Code363LF0000X

License✔ Licensed in CT · 003167

800 HOWARD AVE, New Haven, CT 06519

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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 Ann Fieffer Aprn, Rn 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

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

Superior Health Care Of Ct, LLC

20 mi

Critical Care Medicine

444 WOLCOTT RD
Wolcott, CT 06716

Reassigned Medicare billing, Connecticut enrollment
4 clinicians in this Medicare group

NPI 1366981128 (203) 879-4695

Step Up Care PC LLC

65 mi

Counselor

111 WESTCOTT RD
Danielson, CT 06239

Reassigned Medicare billing, Connecticut enrollment
390 clinicians in this Medicare group

NPI 1154884740 (718) 298-4375

Matrix Medical Plus

826 mi

Nurse Practitioner

424 CHURCH ST STE 2600
Nashville, TN 37219

Reassigned Medicare billing, Connecticut enrollment
79 clinicians in this Medicare group

NPI 1376973461 (877) 564-3627

Signify Health Medical Associates, PLLC

1,435 mi

General Practice

4055 VALLEY VIEW LN STE 700
Dallas, TX 75244

Reassigned Medicare billing, Connecticut enrollment
167 clinicians in this Medicare group

NPI 1750845863 (972) 715-3800

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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 06519 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

$93.86 typical visit price

range $60.82 – $183.10

Typical copayment $23.46 (range $15.20 – $45.77)

Most-billed visit code 99203

Established Patient

$106.68 typical visit price

range $19.76 – $149.26

Typical copayment $26.67 (range $4.94 – $37.31)

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.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MS. PAULA M. TORTORICI-SCHEFF FNP

Nurse Practitioner (Family)

800 HOWARD AVE
NEW HAVEN, CT 06519

South Central Connecticut Planning Region (203) 688-4242

GERARD ANDREW BETRO MD

Surgery

800 HOWARD AVE, YALE PHYSICIANS BLDG
NEW HAVEN, CT 06519

South Central Connecticut Planning Region (203) 785-2140

ALEXA BLOOD APRN

Nurse Practitioner

800 HOWARD AVE
NEW HAVEN, CT 06519

South Central Connecticut Planning Region (203) 785-2565

MICHAEL DIGIOVANNA MD

Internal Medicine (Medical Oncology)

800 HOWARD AVE, YALE PHYSICIANS BUILDING - 2ND FLOOR
NEW HAVEN, CT 06519

South Central Connecticut Planning Region (203) 688-4191

HELENA TERESA CHMIELOWICZ APRN

Clinical Nurse Specialist (Gerontology)

800 HOWARD AVE
NEW HAVEN, CT 06519

South Central Connecticut Planning Region (203) 785-2140

DR. MARC LEWIS ROSEN MD

Physical Medicine & Rehabilitation

800 HOWARD AVE
NEW HAVEN, CT 06519

South Central Connecticut Planning Region (203) 785-2579

MICHELE ANNE GOYETTE -EWING PHD

Psychologist (Clinical Child & Adolescent)

800 HOWARD AVE, YALE PHYSICIANS BLDG
NEW HAVEN, CT 06519

South Central Connecticut Planning Region (203) 785-2140

UZMA USMAN MD

Psychiatry & Neurology (Neuromuscular Medicine)

800 HOWARD AVE
NEW HAVEN, CT 06519

South Central Connecticut Planning Region (999) 999-9999

DR. NISHANT KUMAR MISHRA MBBS PHD

Psychiatry & Neurology (Vascular Neurology)

800 HOWARD AVE
NEW HAVEN, CT 06519

South Central Connecticut Planning Region (203) 737-1057

DR. BRIAN SHINDER

Urology

800 HOWARD AVE
NEW HAVEN, CT 06519

South Central Connecticut Planning Region (203) 785-2815

SARAH ELIZABETH FITZPATRICK LCSW

Social Worker

800 HOWARD AVE, YALE PHYSICIANS BLDG
NEW HAVEN, CT 06519

South Central Connecticut Planning Region (203) 785-2140

DR. JAMES VAN RENSSELAER HUNT FREEMAN M.D.

Internal Medicine (Clinical Cardiac Electrophysiology)

800 HOWARD AVE
NEW HAVEN, CT 06519

South Central Connecticut Planning Region (203) 785-4191

MARTINA SERAINA BURN MD

Obstetrics & Gynecology

800 HOWARD AVE, YNHH-OBSTETRICS, GYNECOLOGY & REPRODUCTIVE SCIENCES
NEW HAVEN, CT 06519

South Central Connecticut Planning Region (203) 785-4004

ERKUT BAHCECI MD

Internal Medicine (Hematology)

800 HOWARD AVE, YALE PHYSICIANS BUILDING
NEW HAVEN, CT 06519

South Central Connecticut Planning Region (203) 785-2140

DR. FRANCIS Y LEE MD

Orthopaedic Surgery

800 HOWARD AVE, YALE PHYSICIAN BUILDING, FIRST FLOOR
NEW HAVEN, CT 06519

South Central Connecticut Planning Region (203) 785-2579

MR. WILLIAM WYSKIEL

Pharmacist

800 HOWARD AVE
NEW HAVEN, CT 06519

South Central Connecticut Planning Region (203) 688-6816

MARY S BOGUCKI MD

Emergency Medicine

800 HOWARD AVE, YALE PHYSICIANS BLDG
NEW HAVEN, CT 06519

South Central Connecticut Planning Region (203) 785-2140

JILL LACY MD

Internal Medicine (Medical Oncology)

800 HOWARD AVE, YALE PHYSICIANS BLDG-2ND FLOOR
NEW HAVEN, CT 06519

South Central Connecticut Planning Region (203) 737-1600

JOHN W COLBERG MD

Urology

800 HOWARD AVE, YALE PHYSICIANS BUILDING 3RD FLOOR
NEW HAVEN, CT 06519

South Central Connecticut Planning Region (203) 785-2815

DR. LINDA LEE HUH M.D.

Psychiatry & Neurology (Neurology with Special Qualifications in Child Neurology)

800 HOWARD AVE
NEW HAVEN, CT 06519

South Central Connecticut Planning Region (203) 843-3102

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 Ann Fieffer's NPI number?

The NPI number for Mary Ann Fieffer is 1932147675. It was assigned to this individual provider in the NPPES registry on June 3, 2006.

Where is Mary Ann Fieffer located?

Mary Ann Fieffer practices at 800 Howard Ave Yale Physicians Bldg, New Haven, CT 06519. The listed phone number is (203) 785-2140.

What is Mary Ann Fieffer's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.

Is Mary Ann Fieffer enrolled in Medicare?

Yes. Mary Ann Fieffer is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Mary Ann Fieffer's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mary Ann Fieffer reassigns Medicare benefits to 4 organizations: Superior Health Care Of Ct, LLC (Wolcott, CT), Step Up Care PC LLC (Danielson, CT), Matrix Medical Plus (Nashville, TN) and Signify Health Medical Associates, PLLC (Dallas, TX). 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 Ann Fieffer'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 Ann Fieffer was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 months 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.