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DR. MARY KATHLEEN KEOWN M.D.
NPI 1437470531
Pediatrics in New York, NY

Active since June 13, 2010PECOS Enrolled
534 W 135TH ST, NEW YORK, NY 10031(212) 491-2300(212) 491-2323 Get Directions Write a Review

NPPES record last updated: October 27, 2022. Verified against the NPPES registry weekly; last sync: November 08, 2026.

About Dr. Mary Kathleen Keown M.d. NPPES

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

DR. MARY KATHLEEN KEOWN M.D. (NPI 1437470531) is an individual pediatrics provider in New York, New York, licensed in New York (271462) and active in the NPI registry since June 2010. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1437470531
Entity TypeIndividualFemale
Primary Taxonomy208000000X
Provider Legal NameDR. MARY KATHLEEN KEOWNCredential: M.D.
Location Address534 W 135TH STNew York, NY 10031-8644
Mailing Address622 W 168th St # Vc417New York, NY 10032-3720 · (212) 305-6227 · Fax (212) 305-8819
Phone(212) 491-2300
Fax(212) 491-2323
Sole ProprietorNo
Enumeration DateJune 13, 2010
Last NPPES UpdateOctober 27, 2022
NPPES CertifiedOctober 27, 2022
✔ NPI 1437470531 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatricsAllopathic & Osteopathic Physicians
Taxonomy Code208000000X
License✔ Licensed in NY · 271462
Definition
A pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectrum of health services ranging from preventive healthcare to the diagnosis and treatment of acute and chronic diseases. A pediatrician deals with biological, social and environmental influences on the developing child, and with the impact of disease and dysfunction on development.
534 W 135TH ST, New York, NY 10031
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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. Mary Kathleen Keown M.d. 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.

Medicare Billing Reassignments

2

Medicare enrollment records show Mary Keown reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Trustees Of Columbia University In The City Of New York
1.7 mi
Anesthesiology
622 W 168TH ST
New York, NY 10032
  • Reassigned Medicare billing, New York enrollment
  • Also billed through NPI 1982993184 (New York)
  • 3,922 clinicians in this Medicare group
NPI 1477068971 (212) 305-9876
Weill Medical College Of Cornell
2.9 mi
Internal Medicine
215 EAST 85TH STREET
New York, NY 10028
  • Reassigned Medicare billing, New York enrollment
  • Also billed through NPI 1245355270 (New York)
  • 980 clinicians in this Medicare group
NPI 1417990649 (646) 962-7300

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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 10031 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
$102.04 typical visit price
range $65.69 – $198.19
Typical copayment $25.51 (range $16.42 – $49.54)
Most-billed visit code 99203
Established Patient
$114.88 typical visit price
range $21.20 – $160.66
Typical copayment $28.72 (range $5.30 – $40.16)
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 16

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

PAMELA VALDEZ LMSW
Social Worker
534 W 135TH ST
NEW YORK, NY 10031
New York County (212) 491-2300
CYNTHIA ARREOLA LMSW
Social Worker (Clinical)
534 W 135TH ST
NEW YORK, NY 10031
New York County (212) 491-2326
JOELY F FERNANDEZ
Nurse Practitioner (Family)
534 W 135TH ST
NEW YORK, NY 10031
New York County (212) 491-9300
DR. ATHINA VASSILAKIS MD
Internal Medicine
534 W 135TH ST
NEW YORK, NY 10031
New York County (866) 463-2778
KIM K CARAWAY CNM
Nurse Practitioner (Obstetrics & Gynecology)
534 W 135TH ST, CHARLES B RANGEL COMMUNITY CENTER -DEPT OB/GYN
NEW YORK, NY 10031
New York County (212) 491-2300
DR. CHANELLE MONIQUE DIAZ MD, MPH
Internal Medicine
534 W 135TH ST
NEW YORK, NY 10031
New York County (212) 491-2300
QI SUN MD
Psychiatry & Neurology (Psychiatry)
534 W 135TH ST
NEW YORK, NY 10031
New York County (646) 689-3983
GISELLE ROSADO
Social Worker (Clinical)
534 W 135TH ST
NEW YORK, NY 10031
New York County (212) 491-2335

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 Keown's NPI number?

The NPI number for Mary Keown is 1437470531. It was assigned to this individual provider in the NPPES registry on June 13, 2010.

Where is Mary Keown located?

Mary Keown practices at 534 W 135th St, New York, NY 10031. The listed phone number is (212) 491-2300.

What is Mary Keown's specialty?

The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.

Is Mary Keown enrolled in Medicare?

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

Which organizations bill Medicare for Mary Keown's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mary Keown reassigns Medicare benefits to 2 organizations: Trustees Of Columbia University In The City Of New York (New York, NY) and Weill Medical College Of Cornell (New York, NY). Each 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 Mary Keown'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 Mary Keown was last updated on October 27, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.