Doctor profile · Federal record

Dr. Mark Sullivan, M.D.

Internal Medicine Physician (CMS: Critical Care (Intensivists)) · Emergency Medicine Physician · Seattle, WA

  • NPI 1952341869
  • Accepts Medicare
  • MIPS 82.8 / 100 · 2023
  • 23 yrs in practice
  • Male
  • Group practice
  • No sanctions

Practice & contact

NPPES Updated May 11, 2026
Primary practice
325 9Th Ave
Seattle, WA 981042420
(206) 731-3074
Mailing address
Po Box 50095
Seattle, WA 981455095

Credentials & registration

NPPES · NUCC
NPI registered
June 2006 — 20 yrs on file
Profile last updated
September 11, 2025
Year of graduation
2003 — 23 yrs since
Specialty taxonomy
207R00000X — NUCC code
State license (1)
Washington #MD00046141
Medicaid
WA #8454142

Federal sanctions & exclusions

OIG LEIE Updated May 11, 2026

No sanctions, exclusions or revocations on file

Checked against OIG LEIE on NPI 1952341869. Last verified May 11, 2026.

Medicare procedures · 2023

Top services delivered

CMS Provider Utilization
Total services
68
Distinct HCPCS
1
Medicare allowed
$15,354
HCPCS Description Services Patients Avg allowed
99291 Critical care, first 30-74 minutes 68 31 $226

In context: peer comparison

Among 174 peers in Seattle Internal Medicine Physician, average services per provider: 77. This provider delivers 0.9× the peer median.

Hospital affiliations

CMS Hospital Compare

Frequently asked questions

Auto-generated from federal data
What is Dr. Mark Sullivan's medical specialty?
Dr. Mark Sullivan practices Internal Medicine Physician in Seattle, WA.
Where does Dr. Mark Sullivan practice?
Dr. Mark Sullivan practices at 325 9Th Ave, Seattle, WA 981042420. Office phone: 2067313074.
What is Dr. Mark Sullivan's NPI?
Dr. Mark Sullivan's National Provider Identifier (NPI) is 1952341869, issued by NPPES.
Does Dr. Mark Sullivan accept Medicare assignment?
Yes. Dr. Mark Sullivan accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Mark Sullivan commonly perform?
Top Medicare-reported procedures in 2023: Critical care (HCPCS 99291). Source: CMS Medicare Physician & Other Practitioners file.

Methodology · sources used on this page

All figures on this page come from publicly available federal datasets. We do not edit, score, or summarise the underlying data. Profile generated Jun 17, 2026.

NPPES Provider identifiers and practice info May 11, 2026
Open Payments Industry payments to providers (Sunshine Act) May 11, 2026
Medicare Procedure Utilization Services and allowed amounts by HCPCS May 11, 2026
Medicare Part D Prescription drug claims May 11, 2026
CMS MIPS Quality performance scores May 11, 2026
OIG LEIE Federal exclusion / sanctions list May 11, 2026

Information based on publicly available federal data. Not medical advice. Report incorrect data ›