1. Home
  2. Directory
  3. Connecticut
  4. New Haven
  5. Obstetrics Gynecology
  6. NPI Profile

HILLARY ELSPETH WYATT HOSIER MD
NPI 1407384522
Obstetrics & Gynecology - Maternal & Fetal Medicine in New Haven, CT

Active since June 02, 2017PECOS EnrolledAccepts Medicare Assignment
20 YORK STREET, YNHH OBSTETRICS & GYNECOLOGY, NEW HAVEN, CT 06510(203) 688-4242 Get Directions Write a Review

NPPES record last updated: May 14, 2024. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: May 14, 2024, Apr 7, 2021, Jun 2, 2017 (3 updates tracked since 2017).

About Hillary Elspeth Wyatt Hosier Md NPPES

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

HILLARY ELSPETH WYATT HOSIER MD (NPI 1407384522) is an individual maternal & fetal medicine provider in New Haven, Connecticut, licensed in Georgia (99193) and active in the NPI registry since June 2017. She is enrolled in Medicare PECOS, is affiliated with Grady Memorial Hospital, and is a graduate of University Of Maryland School Of Medicine (2017).

NPPES Registry Identity

NPI1407384522
Entity TypeIndividualFemale
Primary Taxonomy207VM0101X
Provider Legal NameHILLARY ELSPETH WYATT HOSIERCredential: MD
Location Address20 YORK STREET, YNHH OBSTETRICS & GYNECOLOGYNew Haven, CT 06510-3220
Mailing Address20 York Street, Ynhh Obstetrics & GynecologyNew Haven, CT 06510-3220 · (203) 688-4242
Phone(203) 688-4242
Sole ProprietorYes
Medical School CMSUniversity Of Maryland School Of MedicineGraduated 2017
Enumeration DateJune 2, 2017
Last NPPES UpdateMay 14, 20243 updates tracked since enumeration
NPPES CertifiedMay 14, 2024
✔ NPI 1407384522 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyObstetrics & Gynecology · Maternal & Fetal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207VM0101X
License✔ Licensed in GA · 99193
Definition
An obstetrician/gynecologist who cares for, or provides consultation on, patients with complications of pregnancy. This specialist has advanced knowledge of the obstetrical, medical and surgical complications of pregnancy and their effect on both the mother and the fetus. The specialist also possesses expertise in the most current diagnostic and treatment modalities used in the care of patients with complicated pregnancies.
Also ListedObstetrics & GynecologyTaxonomy 207V00000X · License 67560 (CT)
Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X
20 YORK STREET, New Haven, CT 06510
Open in Google Maps ↗

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Oscar Health.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Hillary Elspeth Wyatt Hosier Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID5799054979
PECOS Enrollment IDI20240716002788
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

2

Medicare enrollment records show Hillary Hosier reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

The Emory Clinic Inc
811 mi
Internal Medicine
1365 CLIFTON RD NE
Atlanta, GA 30322
  • Reassigned Medicare billing, Georgia enrollment
  • 4,840 clinicians in this Medicare group
NPI 1396798229 (404) 778-2144
Emory Medical Care Foundation Inc
815 mi
Internal Medicine
80 JESSE HILL JR DRIVE, EMCF
Atlanta, GA 30303
  • Reassigned Medicare billing, Georgia enrollment
  • 2,681 clinicians in this Medicare group
NPI 1063452381 (404) 778-7717

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

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Grady Memorial Hospital

Acute Care Hospitals · Atlanta, GA
1/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number110079
Location80 Jesse Hill, Jr Drive SEAtlanta, GA 30303 · Fulton County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 06510 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
$138.84 typical visit price
range $60.82 – $183.10
Typical copayment $34.71 (range $15.20 – $45.77)
Most-billed visit code 99204
Established Patient
$75.55 typical visit price
range $19.76 – $149.26
Typical copayment $18.88 (range $4.94 – $37.31)
Most-billed visit code 99213
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.

SARAH HILL LCSW
Social Worker (Clinical)
20 YORK STREET, YALE-NEW HAVEN PSYCHIATRIC HOSPITAL
NEW HAVEN, CT 06510
South Central Connecticut Planning Region (203) 688-9907
JENNIFER PALERMO MD
Student in an Organized Health Care Education/Training Program
20 YORK STREET, YNHH TOMPKINS 226
NEW HAVEN, CT 06510
South Central Connecticut Planning Region (203) 688-9503
TASHA LEE CUVI APRN
Nurse Practitioner (Gerontology)
20 YORK STREET, YALE-NEW HAVEN HOSPITAL
NEW HAVEN, CT 06510
South Central Connecticut Planning Region (203) 688-4748
NIKHIL SEVAL M.D.
Internal Medicine
20 YORK STREET, YNHH - IM INFECTIOUS DISEASES
NEW HAVEN, CT 06510
South Central Connecticut Planning Region (203) 688-4242
JESSICA LAUREN DOLMAN MD
Hospitalist
20 YORK STREET, YNHH DEPT OF INTERNAL MEDICINE
NEW HAVEN, CT 06510
South Central Connecticut Planning Region (203) 688-4242
EESHA VIJAYKUMAR NATARAJAN MBBS
Student in an Organized Health Care Education/Training Program
20 YORK STREET, YNHH TOMPKINS 226
NEW HAVEN, CT 06510
South Central Connecticut Planning Region (203) 688-9503
NIRANJANA RAMANI MBBS
Student in an Organized Health Care Education/Training Program
20 YORK STREET, YALE NEW HAVEN HOSPITAL
NEW HAVEN, CT 06510
South Central Connecticut Planning Region (203) 688-4242
MRS. SHARON MOALES LCSW
Social Worker (Clinical)
20 YORK STREET, YALE NEW HAVEN HOSPITAL
NEW HAVEN, CT 06510
South Central Connecticut Planning Region (203) 688-5193

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 Hillary Hosier's NPI number?

The NPI number for Hillary Hosier is 1407384522. It was assigned to this individual provider in the NPPES registry on June 2, 2017.

Where is Hillary Hosier located?

Hillary Hosier practices at 20 York Street Ynhh Obstetrics & Gynecology, New Haven, CT 06510. The listed phone number is (203) 688-4242.

What is Hillary Hosier's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology, specializing in Maternal & Fetal Medicine, with taxonomy code 207VM0101X.

Is Hillary Hosier enrolled in Medicare?

Yes. Hillary Hosier is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Hillary Hosier's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Hillary Hosier reassigns Medicare benefits to 2 organizations: The Emory Clinic Inc (Atlanta, GA) and Emory Medical Care Foundation Inc (Atlanta, GA). 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 Hillary Hosier's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Hillary Hosier accept?

Health plans from Oscar Health list Hillary Hosier as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Hillary Hosier affiliated with any hospitals?

According to CMS data, Hillary Hosier is affiliated with Grady Memorial Hospital.

When was this NPI record last updated?

The NPPES record for Hillary Hosier was last updated on May 14, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.