1. Home
  2. Directory
  3. District Of Columbia
  4. Washington
  5. Internal Medicine
  6. NPI Profile

DR. MARY BARKER BARTON MD, MPP
NPI 1225971526
Internal Medicine in Washington, DC

Active since April 11, 2026PECOS Enrolled
2333 ONTARIO RD NW, WASHINGTON, DC 20009(844) 796-2797 Get Directions Write a Review

NPPES record last updated: April 11, 2026. Verified against the NPPES registry weekly; last sync: August 30, 2026.

About Dr. Mary Barker Barton Md, Mpp NPPES

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

DR. MARY BARKER BARTON MD, MPP (NPI 1225971526) is an individual internal medicine provider in Washington, District Of Columbia, licensed in District Of Columbia (MD500003440) and active in the NPI registry since April 2026. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1225971526
Entity TypeIndividualFemale
Primary Taxonomy207R00000X
Provider Legal NameDR. MARY BARKER BARTONCredential: MD, MPP
Location Address2333 ONTARIO RD NWWashington, DC 20009-2627
Mailing Address6306 Broad Branch RdChevy Chase, MD 20815-3342
Phone(844) 796-2797
Sole ProprietorNo
Enumeration DateApril 11, 2026
NPPES CertifiedApril 11, 2026
✔ NPI 1225971526 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 · MD500003440
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.
2333 ONTARIO RD NW, Washington, DC 20009
Open in Google Maps ↗

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Mary Barker Barton Md, Mpp is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 20009 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.

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.

JOANNA ESTHER RIVERA-SANTANA RN
Registered Nurse (Community Health)
2333 ONTARIO RD NW
WASHINGTON, DC 20009
District of Columbia (202) 483-8196
DR. ESTELA M. GONZALEZ MD
Psychiatry & Neurology (Child & Adolescent Psychiatry)
2333 ONTARIO RD NW
WASHINGTON, DC 20009
District of Columbia (202) 420-7121
MARY'S CENTER FOR MATERNAL & CHILD CARE, INC
Specialist
2333 ONTARIO RD NW
WASHINGTON, DC 20009
District of Columbia (202) 483-8196
CHRISTINA M HOEHNER
Social Worker
2333 ONTARIO RD NW
WASHINGTON, DC 20009
District of Columbia (202) 235-1900
MARY'S CENTER FOR MATERNAL & CHILD CARE, INC
Dentist (Dental Public Health)
2333 ONTARIO RD NW
WASHINGTON, DC 20009
District of Columbia (202) 483-8196
GABRIELA SANTAMARIA CPNP-PC, IBCLC
Nurse Practitioner (Pediatrics)
2333 ONTARIO RD NW
WASHINGTON, DC 20009
District of Columbia (202) 483-8196
ABIGAIL WILLIAMS LGSW
Social Worker
2333 ONTARIO RD NW
WASHINGTON, DC 20009
District of Columbia (202) 483-8196
MS. CARLA CECILIA CORNEJO RDH
Dental Hygienist
2333 ONTARIO RD NW
WASHINGTON, DC 20009
District of Columbia (202) 545-8023

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 Mary Barton's NPI number?

The NPI number for Mary Barton is 1225971526. It was assigned to this individual provider in the NPPES registry on April 11, 2026.

Where is Mary Barton located?

Mary Barton practices at 2333 Ontario Rd NW, Washington, DC 20009. The listed phone number is (844) 796-2797.

What is Mary Barton's specialty?

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

Is Mary Barton enrolled in Medicare?

Yes. Mary Barton is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Mary Barton was last updated on April 11, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.