Mary C. Onderdonk, CRNP, DNP
- Part D claims, 2024
- 141
- Hospital affiliations
- 1
- Medical group
- 1
- State license
- 1
- Year NPI issued
- 2021
- Practice address
- 6701 North Charles Street, Baltimore, MD 21204
- Practice phone
- Call (443) 849-2000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Mary Onderdonk's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Mary C. Onderdonk is a gerontology nurse practitioner in Hunt Valley, Maryland
Mary Onderdonk practices at Greater Baltimore Medical Center in Baltimore, Maryland, part of GBMC HealthCare.
Mary Onderdonk's NPI, 1245802156, was assigned on July 12, 2021. Mary Onderdonk holds Maryland license R234428.
- NPI
- 1245802156NPI Registry (opens in a new tab)
- NPI enumeration date
- July 12, 2021
- NPI status
- Active
- Practice phone
- (443) 849-2000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 31
- Medical school graduation
- 2021
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Mary C. Onderdonk practices in Baltimore and Hunt Valley
Mary Onderdonk's primary practice is Greater Baltimore Medical Center, at 6701 North Charles Street, Baltimore, MD 21204 in Baltimore County. The practice phone is (443) 849-2000. The NPI Registry lists Mary Onderdonk's practice address as 11311 McCormick Rd, Hunt Valley, MD 21031.
- Greater Baltimore Medical CenterPrimary6701 North Charles Street, Baltimore, MD 21204 · Baltimore CountyPhone(443) 849-2000
- NPI Registry address11311 McCormick Rd, Hunt Valley, MD 21031 · Baltimore County
Sources: NPPES NPI Registry (CMS); Dmand AI Affiliation Data; Doctors and Clinicians National Downloadable File (CMS); and Dmand AI Practice Data
Mary C. Onderdonk is affiliated with 1 site of care and 1 medical group
Mary Onderdonk's primary practice is Greater Baltimore Medical Center in Baltimore, Maryland, part of GBMC HealthCare. The medical group on file is Greater Baltimore Medical Center (GBMC).
Sources: Dmand AI Affiliation Data; Doctors and Clinicians National Downloadable File (CMS); and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Mary C. Onderdonk's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Mary Onderdonk practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Greater Baltimore Medical Center | Available with a free account |
Source: Dmand AI Technology Install Data
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Mary C. Onderdonk is one of 171 gerontology nurse practitioners in Maryland
Gerontology is Mary Onderdonk's primary specialty in the NPI Registry, under taxonomy code 363LG0600X. Mary Onderdonk is licensed in Maryland.
Specialties and state licenses
- Gerontology nurse practitioner, MarylandPrimary
Gerontology nurse practitioners near Mary Onderdonk
Counts of gerontology nurse practitioners with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Mary C. Onderdonk's patients have a median age of 90
Across all payers, Dmand AI patient panel data puts Mary Onderdonk's median patient age at 90, with 0% women.
Mary Onderdonk's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 90
Patient panel by sex, all payers
- Women0%
- Men100%
Source: Dmand AI Patient Panel Data
Mary C. Onderdonk wrote 141 Medicare Part D claims in 2024
In 2024, Mary Onderdonk wrote 141 Medicare Part D claims for 75 patients. 95% of them were for generic drugs.
Mary Onderdonk's Part D claims by kind of drug, 2024
- Generic134 claims95%
- Brand-name and other7 claims5%
Drug classes CMS tracks in Mary Onderdonk's Part D claims, 2024
- Opioids10%14 of 141 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
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Sources for Mary C. Onderdonk's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Dmand AI Org Hierarchy Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Mary C. Onderdonk
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Mary C. Onderdonk's NPI number?
Mary C. Onderdonk's NPI number is 1245802156. It was assigned on July 12, 2021, and it is active in the NPI Registry.
What does Mary C. Onderdonk specialize in?
Mary C. Onderdonk is a gerontology nurse practitioner in Hunt Valley, Maryland. The primary specialty in the NPI Registry is Gerontology Nurse Practitioner (taxonomy code 363LG0600X).
Where does Mary C. Onderdonk practice?
Mary Onderdonk practices at 6701 North Charles Street, Baltimore, MD 21204. Mary Onderdonk also practices at 11311 McCormick Rd, Hunt Valley, MD 21031. Mary Onderdonk's primary practice is Greater Baltimore Medical Center in Baltimore, Maryland, part of GBMC HealthCare.
What is Mary C. Onderdonk's office phone number?
The practice phone on file for Mary Onderdonk is (443) 849-2000.
What is Mary C. Onderdonk's medical license number?
Mary Onderdonk holds Maryland license R234428.
Which hospitals is Mary C. Onderdonk affiliated with?
Mary Onderdonk practices at Greater Baltimore Medical Center in Baltimore, Maryland.
What medical group is Mary C. Onderdonk part of?
Mary Onderdonk is linked to Greater Baltimore Medical Center (GBMC).
How long has Mary C. Onderdonk been practicing?
Mary Onderdonk graduated from medical school in 2021, 5 years ago.
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