Mary Darden Mason, DNP, FNP-BC
Nurse Practitioner · Berlin, MD
Mary Darden Mason, DNP, FNP-BC is a nurse practitioner with a practice address in Berlin, Maryland, and NPI 1407685829, issued on Aug 1, 2024. Check the license (Maryland R266414, as entered in NPPES) with the Maryland board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Mary Darden Mason
- Credential
- DNP, FNP-BC
- Primary taxonomy
- Nurse Practitioner 363L00000X
- License number
- R266414 MD
Self-reported in NPPES; status is on the state search - Practice location
- 10324 Old Ocean City Blvd, Berlin, MD 21811
- Phone
- (410) 629-0041
- Enumerated
- Aug 1, 2024
- Record last updated
- Feb 10, 2025
- Fax
- (410) 629-0544
- Medicare enrollment
- Enrolled (PECOS I20241119000521); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest nurse practitioner records → All 1,248 in Maryland → Look up another NPI →
Also registered at 10324 Old Ocean City Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Edwin Castaneda, M.D.Internal Medicine Physician1063412385
Verify Mary Darden Mason in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Maryland board licenses this profession
Search for license R266414Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
96% fewer Medicare Part D claims than the average nurse practitioner in 2024
40 Medicare Part D claims for 30 beneficiaries, against an average of 1,109 among the 54,319 providers of this specialty who prescribed in Part D.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through 2 group practices
- Tidalhealth Atlantic IncBerlin, MD
- Tidalhealth Primary Care LLCSalisbury, MD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mary Darden Mason among 1,248 nurse practitioner records in Maryland
Mary Darden Mason, DNP, FNP-BC is one of 1,248 nurse practitioner records with a practice address in Maryland. 68% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2024, is newer than 87% of them.
- NPI issued2024 · 87% of these records are older, 8% newer
- In a Medicare fileYes · 68% of these records are
- In the CMS Doctors and Clinicians fileYes · 52% of these records are
- Graduated2024 · median 2018 among the 655 with a school on file
- Record last updated2025 · 48% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363L00000X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
7 nurse practitioner records list a practice address in Berlin
They are 7 of the 659 NPPES records with a practice address in Berlin, and 1,248 nurse practitioner records in Maryland.
All 1,248 in Maryland → Every provider in Berlin → Nurse Practitioner nationwide →
The 8 nurse practitioner records with the nearest ZIP codes
- Nicki Akstinas, CRNPBerlin, MD 218111447339957
- Kathryn Bradshaw, CRNPBerlin, MD 218111760410989
- Leslie Lake, FNP-BCBerlin, MD 218111134877525
- Allison PuseyBerlin, MD 218111366163172
- Nettie Widgeon, MSN, FNP, FNE A/PBerlin, MD 218111801595848
- Ginger Wille, CRNPBerlin, MD 218111396508990
- Tania Bellia-Weiss, NPSalisbury, MD 218041851633499
- Sarah Bowden, DNP CRNP FNP-CSalisbury, MD 218041962033548
Common questions
What is Mary Darden Mason, DNP, FNP-BC's NPI number?
Mary Darden Mason, DNP, FNP-BC's National Provider Identifier (NPI) is 1407685829, issued on Aug 1, 2024. An NPI identifies a provider in billing; it is not a license.
Where is Mary Darden Mason, DNP, FNP-BC located?
The NPPES record lists a practice address at 10324 Old Ocean City Blvd, Berlin, MD, 21811. Phone: (410) 629-0041. Providers update this record themselves, so call before visiting.
How can I verify Mary Darden Mason, DNP, FNP-BC's license?
NPPES lists Maryland license number R266414, as entered by the provider. Search the Maryland board that licenses this profession; the NPPES record confirms identity only.
How much does Mary Darden Mason, DNP, FNP-BC prescribe under Medicare Part D?
In 2024, Mary Darden Mason, DNP, FNP-BC had 40 Medicare Part D claims for 30 beneficiaries; the average among nurse practitioner prescribers was 1,109. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.