DR. MARY ONDERDONK DNP, CRNP
NPI 1245802156
Nurse Practitioner - Gerontology in Towson, MD

Q: What is Mary Onderdonk's NPI number?

The NPI number for Mary Onderdonk is 1245802156. It was assigned to this individual provider in the NPPES registry on July 12, 2021.

Q: What is Mary Onderdonk's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Gerontology, with taxonomy code 363LG0600X.

Q: When was this NPI record last updated?

The NPPES record for Mary Onderdonk was last updated on August 30, 2021. 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.

Active since July 12, 2021PECOS Enrolled

6701 N CHARLES ST STE 4105, TOWSON, MD 21204(443) 849-6255 Get Directions Write a Review

NPPES record last updated: August 30, 2021. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Aug 23, 2021, Jul 12, 2021 (2 updates tracked since 2021).

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About Dr. Mary Onderdonk Dnp, Crnp NPPES

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

DR. MARY ONDERDONK DNP, CRNP (NPI 1245802156) is an individual gerontology provider in Towson, Maryland, licensed in Maryland (R234428) and active in the NPI registry since July 2021. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1245802156

Entity TypeIndividualFemale

Primary Taxonomy363LG0600X

Provider Legal NameDR. MARY ONDERDONKCredential: DNP, CRNP

Location Address6701 N CHARLES ST STE 4105Towson, MD 21204-6808

Mailing Address6701 N Charles St Ste 4105Towson, MD 21204-6881

Phone(443) 849-6255

Sole ProprietorNo

Enumeration DateJuly 12, 2021

Last NPPES UpdateAugust 30, 20212 updates tracked since enumeration

NPPES CertifiedAugust 30, 2021

✔ NPI 1245802156 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNurse Practitioner · GerontologyPhysician Assistants & Advanced Practice Nursing Providers

Taxonomy Code363LG0600X

License✔ Licensed in MD · R234428

6701 N CHARLES ST STE 4105, Towson, MD 21204

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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 (PECOS)

Dr. Mary Onderdonk Dnp, Crnp 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 21204 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

$94.08 typical visit price

range $60.73 – $183.44

Typical copayment $23.52 (range $15.18 – $45.86)

Most-billed visit code 99203

Established Patient

$106.59 typical visit price

range $19.60 – $149.17

Typical copayment $26.64 (range $4.90 – $37.29)

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.

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Other Providers at the Same Location NPPES 8

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

DR. MEL P DALY M.D.

Family Medicine (Geriatric Medicine)