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ASHWIN JACOB MATHAI M.D.
NPI 1467898817
Psychiatry & Neurology - Addiction Psychiatry in Washington, DC

Active since May 13, 2013Opted out of Medicare · through Dec 2, 2026
35 K ST NE, WASHINGTON, DC 20002(204) 442-4187 Get Directions Write a Review

NPPES record last updated: December 1, 2022. Verified against the NPPES registry weekly; last sync: August 30, 2026.

Record update history: Dec 1, 2022, Mar 31, 2017 (2 updates tracked since 2017).

About Ashwin Jacob Mathai M.d. NPPES

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

ASHWIN JACOB MATHAI M.D. (NPI 1467898817) is an individual addiction psychiatry provider in Washington, District Of Columbia, licensed in New York (284554) and active in the NPI registry since May 2013. He has opted out of Medicare through December 2, 2026 and remains eligible to order and refer.

NPPES Registry Identity

NPI1467898817
Entity TypeIndividualMale
Primary Taxonomy2084P0802X
Provider Legal NameASHWIN JACOB MATHAICredential: M.D.
Location Address35 K ST NEWashington, DC 20002-4216
Mailing Address1100 Alabama Ave Se Rm 238Washington, DC 20032-4542 · (202) 255-8422
Phone(204) 442-4187
Sole ProprietorNo
Enumeration DateMay 13, 2013
Last NPPES UpdateDecember 1, 20222 updates tracked since enumeration
NPPES CertifiedJune 15, 2022
✔ NPI 1467898817 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychiatry & Neurology · Addiction PsychiatryAllopathic & Osteopathic Physicians
Taxonomy Code2084P0802X
License✔ Licensed in NY · 284554
Definition
Addiction Psychiatry is a subspecialty of psychiatry that focuses on evaluation and treatment of individuals with alcohol, drug, or other substance-related disorders, and of individuals with dual diagnosis of substance-related and other psychiatric disorders.
35 K ST NE, Washington, DC 20002
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Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

ⓘ

Opted out of Medicare

Ashwin Jacob Mathai M.d. has filed a Medicare opt-out affidavit. Services are provided under private contract between the provider and the patient, and are not billed to or reimbursed by Medicare. The opt-out is on file from December 2, 2022 through December 2, 2026.

Opt-Out Effective DateDecember 2, 2022
Opt-Out In Effect ThroughDecember 2, 2026Opt-out affidavits renew automatically every two years unless cancelled
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesAn opted-out provider can still order and refer for Medicare patients in the categories marked above, even though their own services are not covered.

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.

ETHEL NGOMBA
Registered Nurse
35 K ST NE
WASHINGTON, DC 20002
District of Columbia (202) 839-3500
TOSHA ADRIAN CORNISH RN
Registered Nurse (General Practice)
35 K ST NE
WASHINGTON, DC 20002
District of Columbia (202) 375-4440
ANGELA SYDNOR
Case Manager/Care Coordinator
35 K ST NE
WASHINGTON, DC 20002
District of Columbia (301) 792-8935
HECTOR EDUARDO OBREGON
Counselor (Mental Health)
35 K ST NE
WASHINGTON, DC 20002
District of Columbia (202) 673-6495
MR. ANTONIO J FREEMAN JR.
Case Manager/Care Coordinator
35 K ST NE
WASHINGTON, DC 20002
District of Columbia (202) 839-3500
KARON EUBANKS
Case Manager/Care Coordinator
35 K ST NE
WASHINGTON, DC 20002
District of Columbia (202) 839-3500
MICHAEL CHINYEAKA NWACHUKWU
Case Manager/Care Coordinator
35 K ST NE
WASHINGTON, DC 20002
District of Columbia (202) 839-3500
SYLVIA E JEFFERSON LICSW
Social Worker (Clinical)
35 K ST NE
WASHINGTON, DC 20002
District of Columbia (202) 442-4190

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 Ashwin Jacob Mathai's NPI number?

The NPI number for Ashwin Jacob Mathai is 1467898817. It was assigned to this individual provider in the NPPES registry on May 13, 2013.

Where is Ashwin Jacob Mathai located?

Ashwin Jacob Mathai practices at 35 K St NE, Washington, DC 20002. The listed phone number is (204) 442-4187.

What is Ashwin Jacob Mathai's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Addiction Psychiatry, with taxonomy code 2084P0802X.

Is Ashwin Jacob Mathai enrolled in Medicare?

No. Ashwin Jacob Mathai has opted out of Medicare through December 2, 2026. Care is provided under private contracts, and Medicare does not pay for services furnished by providers who have opted out. The provider remains eligible to order and refer services for Medicare patients.

When was this NPI record last updated?

The NPPES record for Ashwin Jacob Mathai was last updated on December 1, 2022. 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.