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WILLIAM MILLAR MD
NPI 1013945914
Radiology - Neuroradiology in Southampton, NY

Active since June 29, 2006PECOS EnrolledAccepts Medicare Assignment
570 HAMPTON RD APT 25, SOUTHAMPTON, NY 11968(631) 644-7244 Get Directions Write a Review

NPPES record last updated: June 23, 2023. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About William Millar Md NPPES

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

WILLIAM MILLAR MD (NPI 1013945914) is an individual neuroradiology provider in Southampton, New York, licensed in New York (199311-1) and active in the NPI registry since June 2006. He is enrolled in Medicare PECOS and is a graduate of Other (1987).

NPPES Registry Identity

NPI1013945914
Entity TypeIndividualMale
Primary Taxonomy2085N0700X
Provider Legal NameWILLIAM MILLARCredential: MD
Location Address570 HAMPTON RD APT 25Southampton, NY 11968-3019
Mailing Address570 Hampton Rd Apt 25Southampton, NY 11968-3019 · (631) 644-7244
Phone(631) 644-7244
Sole ProprietorYes
Medical School CMSOtherGraduated 1987
Enumeration DateJune 29, 2006
Last NPPES UpdateJune 23, 2023
NPPES CertifiedJune 23, 2023
✔ NPI 1013945914 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyRadiology · NeuroradiologyAllopathic & Osteopathic Physicians
Taxonomy Code2085N0700X
License✔ Licensed in NY · 199311-1
Definition
A radiologist who diagnoses and treats diseases utilizing imaging procedures as they relate to the brain, spine and spinal cord, head, neck and organs of special sense in adults and children.
Also ListedRadiology · Diagnostic RadiologyTaxonomy 2085R0202X · License 199311-1 (NY)
570 HAMPTON RD APT 25, Southampton, NY 11968
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Other Identifiers 1

Medicaid01598769NY

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

William Millar 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 ID4880675289
PECOS Enrollment IDI20040529000121, I20140721000583
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

6

Medicare enrollment records show William Millar reassigns Medicare billing to 6 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Southside Faculty Medical Affiliates University Faculty Practice Corp
60 mi
Body Imaging
1220 HICKSVILLE RD
Seaford, NY 11783
  • Reassigned Medicare billing, New York enrollment
  • 391 clinicians in this Medicare group
NPI 1033791058 (516) 266-3456
North Shore-Lij Medical PC
70 mi
Urology
1010 NORTHERN BLVD STE 110
Great Neck, NY 11021
  • Reassigned Medicare billing, New York enrollment
  • 9,353 clinicians in this Medicare group
NPI 1053688572 (516) 321-7400
Jefferson University Radiology Associates, LLC
150 mi
Radiology
10160 BUSTLETON AVE STE E
Philadelphia, PA 19116
  • Reassigned Medicare billing, New York and Pennsylvania enrollments
NPI 1992307979 (215) 503-4900
Methodist Associates In Health Care, Inc
155 mi
Diagnostic Radiology
4900 FRANKFORD AVE
Philadelphia, PA 19124
  • Reassigned Medicare billing, Pennsylvania enrollment
  • Medicare enrollment name: Methodist Associates In Healthcare, Inc
  • 600 clinicians in this Medicare group
NPI 1609417872 (215) 831-2063
Geisinger Clinic
156 mi
Family Medicine
3306 LAKE ARIEL HWY
Honesdale, PA 18431
  • Reassigned Medicare billing, Pennsylvania enrollment
  • 4,429 clinicians in this Medicare group
NPI 1720495393 (570) 253-0148
Geisinger-Hm Joint Venture LLC
233 mi
Internal Medicine
255 ROUTE 220 HIGHWAY
Muncy, PA 17756
  • Reassigned Medicare billing, Pennsylvania enrollment
  • 1,405 clinicians in this Medicare group
NPI 1952076119 (570) 308-2600

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 7

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.

Injection, gadobutrol, 0.1 ml A9585
Gadobutrol is a contrast agent used during MRI scans to help provide clearer images. It's injected into your vein before the scan. This helps doctors to see certain areas more clearly for better diagnosis. It's generally safe with few side effects.
2,255 services31 patients
Mri scan of brain before and after contrast 70553
An MRI scan of the brain, both before and after contrast, helps visualize different brain structures. Initially, images are taken without a contrast agent. Then, a safe dye is injected which helps highlight certain areas, providing clearer, more detailed images.
34 services32 patients
Mri scan of brain before and after contrast 70553
An MRI scan of the brain, both before and after contrast, helps visualize different brain structures. Initially, images are taken without a contrast agent. Then, a safe dye is injected which helps highlight certain areas, providing clearer, more detailed images.
23 services23 patients
Mri scan of lower spinal canal without contrast 72148
An MRI scan of the lower spinal canal without contrast is a non-invasive imaging test. It uses a magnetic field and radio waves to produce detailed images of your lower spine. This helps identify issues like disc problems, tumors, or nerve conditions. No dye is used.
13 services12 patients
Ct scan head or brain without contrast 70450
A CT scan of the head or brain without contrast is a non-invasive imaging procedure. It uses X-rays to create detailed pictures of your brain, skull, and other structures inside your head. It helps to detect conditions like strokes, tumors, or injuries. No dye (contrast) is used in this test.
12 services11 patients
Mri scan of lower spinal canal without contrast 72148
An MRI scan of the lower spinal canal without contrast is a non-invasive imaging test. It uses a magnetic field and radio waves to produce detailed images of your lower spine. This helps identify issues like disc problems, tumors, or nerve conditions. No dye is used.
12 services12 patients

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 William Millar's NPI number?

The NPI number for William Millar is 1013945914. It was assigned to this individual provider in the NPPES registry on June 29, 2006.

Where is William Millar located?

William Millar practices at 570 Hampton Rd Apt 25, Southampton, NY 11968. The listed phone number is (631) 644-7244.

What is William Millar's specialty?

The primary specialty registered for this NPI is Radiology, specializing in Neuroradiology, with taxonomy code 2085N0700X.

Is William Millar enrolled in Medicare?

Yes. William Millar 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 William Millar's services?

According to the CMS Revalidation Reassignment List (October 2026 release), William Millar reassigns Medicare benefits to 6 organizations: Southside Faculty Medical Affiliates University Faculty Practice Corp (Seaford, NY), North Shore-Lij Medical PC (Great Neck, NY), Jefferson University Radiology Associates, LLC (Philadelphia, PA), Methodist Associates In Health Care, Inc (Philadelphia, PA), Geisinger Clinic (Honesdale, PA) and 1 more organization, listed in the Medicare section above. 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 William Millar'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 William Millar was last updated on June 23, 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.