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DR. WILLIAM FRANCIS SULLIVAN MD
NPI 1154147965
General Practice in Washington, DC

Active since November 26, 2024PECOS Enrolled
37TH & O STREETS NORTH WEST HEALY HALL ROOM 424, WASHINGTON, DC 20057(202) 784-2853(202) 687-8089 Get Directions Write a Review

NPPES record last updated: November 26, 2024. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Dr. William Francis Sullivan Md NPPES

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

DR. WILLIAM FRANCIS SULLIVAN MD (NPI 1154147965) is an individual general practice provider in Washington, District Of Columbia, licensed in Maryland (D0097553) and active in the NPI registry since November 2024. He is enrolled in Medicare PECOS and is a graduate of Other (1998).

NPPES Registry Identity

NPI1154147965
Entity TypeIndividualMale
Primary Taxonomy208D00000X
Provider Legal NameDR. WILLIAM FRANCIS SULLIVANCredential: MD
Location Address37TH & O STREETS NORTH WEST HEALY HALL ROOM 424Washington, DC 20057-0001
Mailing Address1200 N Garfield St Apt 1204Arlington, VA 22201-6830 · (703) 407-4193
Phone(202) 784-2853
Fax(202) 687-8089
Sole ProprietorNo
Medical School CMSOtherGraduated 1998
Enumeration DateNovember 26, 2024
NPPES CertifiedNovember 26, 2024
✔ NPI 1154147965 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyGeneral PracticeAllopathic & Osteopathic Physicians
Taxonomy Code208D00000X
Licenses✔ Licensed in MD · D0097553✔ Licensed in DC · MD210003174
Definition
A physician who specializes in the general practice of diagnosing, treating, and managing patients with a variety of illnesses and conditions. Source: National Uniform Claim Committee
37TH & O STREETS NORTH WEST HEALY HALL ROOM 424, Washington, DC 20057
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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)

Dr. William Francis Sullivan Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID6204325442
PECOS Enrollment IDI20251029000740
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 Reassignment

Medicare enrollment records show William Sullivan reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Medstar Medical Group II LLC
0.4 mi
Critical Care Medicine
3800 RESERVOIR RD NW
Washington, DC 20007
  • Reassigned Medicare billing, District of Columbia enrollment
  • 3,530 clinicians in this Medicare group
NPI 1205562816 (703) 558-1403

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

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 Sullivan's NPI number?

The NPI number for William Sullivan is 1154147965. It was assigned to this individual provider in the NPPES registry on November 26, 2024.

Where is William Sullivan located?

William Sullivan practices at 37th & O Streets North West Healy Hall Room 424, Washington, DC 20057. The listed phone number is (202) 784-2853.

What is William Sullivan's specialty?

The primary specialty registered for this NPI is General Practice with taxonomy code 208D00000X.

Is William Sullivan enrolled in Medicare?

Yes. William Sullivan is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for William Sullivan's services?

According to the CMS Revalidation Reassignment List (October 2026 release), William Sullivan reassigns Medicare benefits to Medstar Medical Group II LLC (Washington, DC). The 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 Sullivan'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 Sullivan was last updated on November 26, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 23 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.