Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Mary Beth Alder, RN, BSN, NP, DNSC

Individual provider Infectious Disease Physician · NPI 1548450463

Mary Beth Alder, RN, BSN, NP, DNSC is a Nurse Practitioner in Washington, District of Columbia. Qualified in 1990, 36 years ago. Practices with Washington Health Institute, an 18-clinician group and accepts Medicare assignment. Licensed in District of Columbia and Virginia.

Years since qualifying
36
Licensed in
DC, VA
In the registry since
2007
Specialties on file
2
What do these letters mean?
RN — Registered Nurse
A licensed nurse who completed a nursing degree and passed the NCLEX-RN examination.
BSN — Bachelor of Science in Nursing
A four-year nursing degree.
NP — Nurse Practitioner
An advanced practice nurse who can diagnose, treat and in most states prescribe.

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Practice location Address checks out

1140 Varnum St NE Ste 203
Washington, DC 20017-2153
Phone: (202) 525-5175
Fax: (202) 450-6088
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Nurse Practitioner (primary) Taxonomy 363L00000X · Licence RN1015562 (DC)
Infectious Disease Physician Taxonomy 207RI0200X · Licence 0001096719 (VA)

Record details

NPI number1548450463
Entity typeIndividual (Type 1)
GenderFemale
Credentials RN , BSN , NP , DNSC
Sole proprietorNo
NPI enumeratedJuly 26, 2007
Last updated in NPPESMarch 25, 2022
Certification dateMarch 25, 2022

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyNURSE PRACTITIONER
Medical schoolOTHER
Graduated 1990 (36 years in practice)
Group practice Washington Health Institute — 18 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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