1. Home
  2. Directory
  3. Virginia
  4. Winchester
  5. Obstetrics Gynecology
  6. NPI Profile

DR. MASARU NEGI M.D.
NPI 1104185081
Obstetrics & Gynecology - Maternal & Fetal Medicine in Winchester, VA

Active since May 11, 2012PECOS EnrolledAccepts Medicare Assignment
77.78/100
CMS Quality Rating
1870 AMHERST ST STE 3A, WINCHESTER, VA 22601(540) 536-3228(540) 536-3227 Get Directions Write a Review

NPPES record last updated: October 5, 2023. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Oct 5, 2023, Oct 8, 2019, Mar 21, 2016 (3 updates tracked since 2016).

About Dr. Masaru Negi M.d. NPPES

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

DR. MASARU NEGI M.D. (NPI 1104185081) is an individual maternal & fetal medicine provider in Winchester, Virginia, licensed in Virginia (0101279019) and active in the NPI registry since May 2012. He is enrolled in Medicare PECOS, maintains a secondary practice location in Winchester, and is a graduate of Other (2012).

NPPES Registry Identity

NPI1104185081
Entity TypeIndividualMale
Primary Taxonomy207VM0101X
Provider Legal NameDR. MASARU NEGICredential: M.D.
Location Address1870 AMHERST ST STE 3AWinchester, VA 22601-2841
Mailing Address220 Campus Blvd Ste 210Winchester, VA 22601-2889 · (540) 536-5100 · Fax (540) 536-0235
Phone(540) 536-3228
Fax(540) 536-3227
Sole ProprietorYes
Medical School CMSOtherGraduated 2012
Enumeration DateMay 11, 2012
Last NPPES UpdateOctober 5, 20233 updates tracked since enumeration
NPPES CertifiedOctober 5, 2023
✔ NPI 1104185081 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyObstetrics & Gynecology · Maternal & Fetal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207VM0101X
License✔ Licensed in VA · 0101279019
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.
1870 AMHERST ST STE 3A, Winchester, VA 22601
Open in Google Maps ↗

Secondary Practice Location 1

Location 11840 Amherst StWinchester, VA 22601-2808 · Phone (540) 536-8000 · Fax (540) 536-7780

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include CareSource.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

Dr. Masaru Negi M.d. 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 ID4981923331
PECOS Enrollment IDI20230801003576
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 Masaru Negi reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Winchester Medical Center
Same address
Obstetrics & Gynecology
1870 AMHERST ST STE 2E
Winchester, VA 22601
  • Reassigned Medicare billing, Virginia enrollment
  • 756 clinicians in this Medicare group
NPI 1467218909 (540) 667-4546
Shenandoah Memorial Hospital, Inc.
15 mi
Family Medicine
33699 OLD VALLEY PIKE STE D
Strasburg, VA 22657
  • Reassigned Medicare billing, Virginia enrollment
  • 416 clinicians in this Medicare group
NPI 1710494331 (540) 459-1410
Warren Memorial Hospital, Inc.
16 mi
Rural Health
67 RIVERTON COMMONS DR
Front Royal, VA 22630
  • Reassigned Medicare billing, Virginia enrollment
  • 367 clinicians in this Medicare group
NPI 1417447871 (540) 635-0848
County Of Los Angeles
2,199 mi
Clinic/Center
335 E AVENUE I
Lancaster, CA 93535
  • Reassigned Medicare billing, California enrollment
  • 1,939 clinicians in this Medicare group
NPI 1205354370 (661) 471-4232

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 22601 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
$129.04 typical visit price
range $56.19 – $170.30
Typical copayment $32.26 (range $14.04 – $42.57)
Most-billed visit code 99204
Established Patient
$70.08 typical visit price
range $18.07 – $138.91
Typical copayment $17.52 (range $4.51 – $34.72)
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.

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.

77.78/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality73.47
Promoting Interoperability84
Improvement Activities40
Cost65.8

Other Providers at the Same Location NPPES 5

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

DR. VIVEK KUMAR GUPTA MD
Obstetrics & Gynecology (Maternal & Fetal Medicine)
1870 AMHERST ST STE 3A
WINCHESTER, VA 22601
Winchester City (540) 536-3228
M CATHLEEN MCCOY MD
Obstetrics & Gynecology (Maternal & Fetal Medicine)
1870 AMHERST ST STE 3A
WINCHESTER, VA 22601
Winchester City (540) 536-3228
GABRIELA SLIZEWSKA LCGC
Genetic Counselor, MS
1870 AMHERST ST STE 3A
WINCHESTER, VA 22601
Winchester City (540) 536-3228
KAITLIN MADELINE SULLIVAN CGC
Genetic Counselor, MS
1870 AMHERST ST STE 3A
WINCHESTER, VA 22601
Winchester City (540) 536-3228
DR. ALEX SHERWOOD MILLER M.D.
Obstetrics & Gynecology (Maternal & Fetal Medicine)
1870 AMHERST ST STE 3A
WINCHESTER, VA 22601
Winchester City (540) 536-3228

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 Masaru Negi's NPI number?

The NPI number for Masaru Negi is 1104185081. It was assigned to this individual provider in the NPPES registry on May 11, 2012.

Where is Masaru Negi located?

Masaru Negi practices at 1870 Amherst St Ste 3A, Winchester, VA 22601. The listed phone number is (540) 536-3228.

What is Masaru Negi's specialty?

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

Is Masaru Negi enrolled in Medicare?

Yes. Masaru Negi 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 Masaru Negi's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Masaru Negi reassigns Medicare benefits to 4 organizations: Winchester Medical Center (Winchester, VA), Shenandoah Memorial Hospital, Inc. (Strasburg, VA), Warren Memorial Hospital, Inc. (Front Royal, VA) and County Of Los Angeles (Lancaster, CA). 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 Masaru Negi's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Masaru Negi accept?

Health plans from CareSource list Masaru Negi 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.

When was this NPI record last updated?

The NPPES record for Masaru Negi was last updated on October 5, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.