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

Mr. April John Tambaoan Mercado, NP

Individual provider Nurse Practitioner · NPI 1497409452

Mr. April John Tambaoan Mercado, NP is a Nurse Practitioner in Frederick, Maryland. Qualified in 2021, 5 years ago. Practices with Washington Nephrology Associates LLP, a 31-clinician group and accepts Medicare assignment. Licensed in Maryland.

Years since qualifying
5
Licensed in
MD
In the registry since
2022
What do these letters mean?
NP — Nurse Practitioner
An advanced practice nurse who can diagnose, treat and in most states prescribe.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

1562 Opossumtown Pike
Frederick, MD 21702-4337
Phone: (240) 215-6310
Fax: (240) 566-7754
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Nurse Practitioner (primary) Taxonomy 363L00000X · Licence R213903 (MD)

Record details

NPI number1497409452
Entity typeIndividual (Type 1)
GenderMale
Credentials NP
Sole proprietorNo
NPI enumeratedFebruary 9, 2022
Last updated in NPPESJuly 14, 2026
Certification dateJuly 14, 2026

Medicare enrollment

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

Medicare specialtyNURSE PRACTITIONER
Medical schoolOTHER
Graduated 2021 (5 years in practice)
Group practice Washington Nephrology Associates Llp — 31 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Other providers in Frederick