Mary K. Williams-Feldman, C.R.N.P.
Nurse Practitioner · Easton, MD
Mary K. Williams-Feldman, C.R.N.P. is a nurse practitioner with a practice address in Easton, Maryland, and NPI 1194117895, issued on Mar 4, 2015. Check the license (Maryland R178258, as entered in NPPES) with the Maryland board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Mary K. Williams-Feldman
- Credential
- C.R.N.P.
- Primary taxonomy
- Nurse Practitioner 363L00000X
- License number
- R178258 MD
Self-reported in NPPES; status is on the state search - Practice location
- 5 Martin Court, Easton, MD 21601
- Phone
- (410) 820-9823
- Enumerated
- Mar 4, 2015
- Record last updated
- Feb 18, 2016 (not updated in 10 years: call before relying on the address or phone)
- Fax
- (866) 606-6428
- Medicaid ID
- 651019100 MD
- Medicare enrollment
- Enrolled (PECOS I20230331001271); 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 5 Martin Court
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Anish Hinduja, M.D.Nephrology Physician1023115508
- Christina Turner, M.D.Nephrology Physician1437284056
- Adam Weinstein, M.D.Nephrology Physician1396842878
Verify Mary K. Williams-Feldman in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Maryland board licenses this profession
Search for license R178258Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
84% fewer Medicare Part D claims than the average nurse practitioner in 2024
178 Medicare Part D claims for 38 beneficiaries, against an average of 1,109 among the 54,319 providers of this specialty who prescribed in Part D. Brand-name drugs were 83% of claims.
Most prescribed
- Mounjaro48 claims
- Wegovy43 claims
- Ozempic39 claims
- Rybelsus14 claims
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 one group practice
- Tidalhealth Physician Network, Inc.Seaford, DE
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mary K. Williams-Feldman among 1,248 nurse practitioner records in Maryland
Mary K. Williams-Feldman, C.R.N.P. 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 2015, is newer than 46% of them.
- NPI issued2015 · 46% of these records are older, 52% newer
- In a Medicare fileYes · 68% of these records are
- In the CMS Doctors and Clinicians fileYes · 52% of these records are
- Graduated2012 · median 2018 among the 655 with a school on file
- Record last updated2016 · 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).
21 nurse practitioner records list a practice address in Easton
They are 21 of the 928 NPPES records with a practice address in Easton, and 1,248 nurse practitioner records in Maryland.
All 1,248 in Maryland → Every provider in Easton → Nurse Practitioner nationwide →
The 8 nurse practitioner records with the nearest ZIP codes
- Mary Bishop, CRNPEaston, MD 216011497768790
- Kimberly Fitzgerald, CRNPEaston, MD 216011336553247
- Marilyn Gall, CRNPEaston, MD 216011508825019
- Mary Horseman, CRNPEaston, MD 216011598778680
- Katherine Macdonald, FNP-BCEaston, MD 216011538660527
- Jordan McAllister, NP-CEaston, MD 216011205226305
- Glenda McCarter, CRNPEaston, MD 216011982771119
- Renee Reisinger, MS CRNPEaston, MD 216011184736894
Common questions
What is Mary K. Williams-Feldman, C.R.N.P.'s NPI number?
Mary K. Williams-Feldman, C.R.N.P.'s National Provider Identifier (NPI) is 1194117895, issued on Mar 4, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Mary K. Williams-Feldman, C.R.N.P. located?
The NPPES record lists a practice address at 5 Martin Court, Easton, MD, 21601. Phone: (410) 820-9823. Providers update this record themselves, so call before visiting.
How can I verify Mary K. Williams-Feldman, C.R.N.P.'s license?
NPPES lists Maryland license number R178258, as entered by the provider. Search the Maryland board that licenses this profession; the NPPES record confirms identity only.
How much does Mary K. Williams-Feldman, C.R.N.P. prescribe under Medicare Part D?
In 2024, Mary K. Williams-Feldman, C.R.N.P. had 178 Medicare Part D claims for 38 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.