MR. APRIL JOHN TAMBAOAN MERCADO NP
NPI 1497409452
Nurse Practitioner in Frederick, MD
About Mr. April John Tambaoan Mercado Np NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MR. APRIL JOHN TAMBAOAN MERCADO NP (NPI 1497409452) is an individual nurse practitioner in Frederick, Maryland, licensed in Maryland (R213903) and active in the NPI registry since February 2022. He is enrolled in Medicare PECOS and is a graduate of Other (2021).
NPPES Registry Identity
Specialties & Licenses
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Mr. April John Tambaoan Mercado Np is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
3Medicare enrollment records show April John Mercado reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Frederick, MD 21702
- Reassigned Medicare billing, Maryland enrollment
- 245 clinicians in this Medicare group
Frederick, MD 21704
- Reassigned Medicare billing, Maryland enrollment
- 3 clinicians in this Medicare group
Rockville, MD 20854
- Reassigned Medicare billing, District of Columbia enrollment
- Medicare enrollment name: Washington Nephrology Associates LLP
- 41 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 21702 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
FREDERICK, MD 21702
FREDERICK, MD 21702
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is April John Mercado's NPI number?
The NPI number for April John Mercado is 1497409452. It was assigned to this individual provider in the NPPES registry on February 9, 2022.
Where is April John Mercado located?
April John Mercado practices at 1562 Opossumtown Pike, Frederick, MD 21702. The listed phone number is (240) 215-6310.
What is April John Mercado's specialty?
The primary specialty registered for this NPI is Nurse Practitioner with taxonomy code 363L00000X.
Is April John Mercado enrolled in Medicare?
Yes. April John Mercado is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for April John Mercado's services?
According to the CMS Revalidation Reassignment List (October 2026 release), April John Mercado reassigns Medicare benefits to 3 organizations: Frederick Health Medical Group LLC (Frederick, MD), Branislav S Romanic MD LLC (Frederick, MD) and Washington Nephrology Associates, L.L.P. (Rockville, MD). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for April John Mercado's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for April John Mercado was last updated on July 14, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Mr. April John Tambaoan Mercado, NP · NPI 1497409452
Nurse Practitioner physician in Frederick, Maryland. Individual provider, active in the CMS NPPES registry since February 9, 2022.
## Identity
- **NPI:** 1497409452 (Entity type: Individual)
- **Enumerated:** February 9, 2022
- **Primary specialty:** Nurse Practitioner · taxonomy 363L00000X
- **State license:** R213903 (Maryland)
- **Sole proprietor:** No
## Practice location
- **Address:** 1562 OPOSSUMTOWN PIKE, Frederick, MD 21702-4337
- **Phone:** (240) 215-6310 · **Fax:** (240) 566-7754
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 3 organizations under Medicare reassignment (form CMS-855R): Frederick Health Medical Group LLC (NPI 1619258225, Frederick, MD); Branislav S Romanic MD LLC (NPI 1033383666, Frederick, MD); Washington Nephrology Associates, L.L.P. (NPI 1124193479, Rockville, MD) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2021
## Record status
- **NPPES last updated:** July 14, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1497409452) · Data from the CMS NPPES public registry.