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DR. STEPHEN ANDREW SEBASTIAN MD
NPI 1386206449
Internal Medicine in Washington, DC

Active since June 28, 2019PECOS EnrolledAccepts Medicare Assignment
94.07/100
CMS Quality Rating
110 IRVING STREET NW, DEPARTMENT OF MEDICINE, WASHINGTON, DC 20010(202) 877-8278 Get Directions Write a Review

NPPES record last updated: September 2, 2025. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Dr. Stephen Andrew Sebastian Md NPPES

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

DR. STEPHEN ANDREW SEBASTIAN MD (NPI 1386206449) is an individual internal medicine provider in Washington, District Of Columbia, licensed in District Of Columbia (MD60004641) and active in the NPI registry since June 2019. He is enrolled in Medicare PECOS, is affiliated with Riverside Shore Memorial Hospital, and is a graduate of Other (2018).

NPPES Registry Identity

NPI1386206449
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. STEPHEN ANDREW SEBASTIANCredential: MD
Location Address110 IRVING STREET NW, DEPARTMENT OF MEDICINEWashington, DC 20010
Mailing Address3114 Sherman Ave NwWashington, DC 20010-1533 · (267) 330-9439
Phone(202) 877-8278
Sole ProprietorNo
Medical School CMSOtherGraduated 2018
Enumeration DateJune 28, 2019
Last NPPES UpdateSeptember 2, 2025
NPPES CertifiedSeptember 2, 2025
✔ NPI 1386206449 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in DC · MD60004641
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
110 IRVING STREET NW, Washington, DC 20010
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Stephen Andrew Sebastian 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 ID840674289
PECOS Enrollment IDI20220901003629, I20251125003868
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.

Areas of Expertise CMS Part B claims 5

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.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232
Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.
269 services139 patients
Hospital discharge day management, more than 30 minutes 99239
Hospital discharge day management over 30 minutes involves a detailed process to ensure a smooth transition from hospital to home. It includes final examinations, discussion of your hospital stay, post-discharge instructions, and coordinating follow-up care.
239 services212 patients
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223
Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.
128 services121 patients
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233
Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.
82 services54 patients
Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes 99231
Follow-up hospital inpatient care is a daily service where a healthcare professional checks on your health progress during your hospital stay. Each session typically lasts 15 minutes, involving updates on your condition and adjustments to your treatment plan, if necessary.
17 services15 patients

Hospital Affiliations CMS Care Compare

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

Riverside Shore Memorial Hospital

Acute Care Hospitals · Onancock, VA
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number490037
Location20480 Market StreetOnancock, VA 23417 · Accomack County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 20010 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
$147.85 typical visit price
range $65.18 – $194.86
Typical copayment $36.96 (range $16.29 – $48.71)
Most-billed visit code 99204
Established Patient
$113.72 typical visit price
range $21.40 – $158.88
Typical copayment $28.43 (range $5.35 – $39.72)
Most-billed visit code 99214
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.

94.07/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored through an Alternative Payment Model
Quality90.65
Promoting Interoperability95.83
Improvement Activities40

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.

MR. HAMZA EMAD MTEIR ALHAWAMLEH M.D.
Student in an Organized Health Care Education/Training Program
110 IRVING STREET NW
WASHINGTON, DC 20010
District of Columbia (202) 877-2835
IMAD ABDULAHAD ISAAC M.D
Student in an Organized Health Care Education/Training Program
110 IRVING STREET NW, ROOM 6A-126
WASHINGTON, DC 20010
District of Columbia (202) 877-2835
DR. BRETT BELL MD, PHD
Student in an Organized Health Care Education/Training Program
110 IRVING STREET NW, DEPARTMENT OF INTERNAL MEDICINE
WASHINGTON, DC 20010
District of Columbia (202) 877-2835
MR. AHMED DANIYAAL RASHEED M.D.
Student in an Organized Health Care Education/Training Program
110 IRVING STREET NW, MEDSTAR WASHINGTON HOSPITAL CENTER
WASHINGTON, DC 20010
District of Columbia (202) 877-2835
NOHA TASNIA AHMED DO
Student in an Organized Health Care Education/Training Program
110 IRVING STREET NW, DEPARTMENT OF OBSTETRICS AND GYNECOLOGY
WASHINGTON, DC 20010
District of Columbia (202) 877-8035
MISS ELIZABETH LEANNE KENEZ M.D.
Emergency Medicine
110 IRVING STREET NW, SUITE NA 1177
WASHINGTON, DC 20010
District of Columbia (202) 877-8080
MR. NAZIH W.N. ALHIRTANI M.D
Student in an Organized Health Care Education/Training Program
110 IRVING STREET NW, DEPARTMENT OF INTERNAL MEDICINE
WASHINGTON, DC 20010
District of Columbia (202) 877-2835
BARA' HISHAM MOH'D AKRAM DWEIK M.D.
Student in an Organized Health Care Education/Training Program
110 IRVING STREET NW
WASHINGTON, DC 20010
District of Columbia (202) 877-8271

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 Stephen Sebastian's NPI number?

The NPI number for Stephen Sebastian is 1386206449. It was assigned to this individual provider in the NPPES registry on June 28, 2019.

Where is Stephen Sebastian located?

Stephen Sebastian practices at 110 Irving Street NW Department Of Medicine, Washington, DC 20010. The listed phone number is (202) 877-8278.

What is Stephen Sebastian's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Stephen Sebastian enrolled in Medicare?

Yes. Stephen Sebastian 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.

Is Stephen Sebastian affiliated with any hospitals?

According to CMS data, Stephen Sebastian is affiliated with Riverside Shore Memorial Hospital.

When was this NPI record last updated?

The NPPES record for Stephen Sebastian was last updated on September 2, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.