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DR. JAMES GAVIN WALLACE-MERCADO DNP, MSN, FNP-C
NPI 1023744406
Nurse Practitioner - Family in Washington, DC

Active since July 27, 2022PECOS Enrolled
1350 CONNECTICUT AVE NW STE 1250, WASHINGTON, DC 20036(888) 663-6331(415) 252-7176 Get Directions Write a Review

NPPES record last updated: May 25, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: May 25, 2026, May 12, 2026, Jan 26, 2026 and 5 more (8 updates tracked since 2022).

About Dr. James Gavin Wallace-mercado Dnp, Msn, Fnp-c NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. JAMES GAVIN WALLACE-MERCADO DNP, MSN, FNP-C (NPI 1023744406) is an individual family provider in Washington, District Of Columbia, licensed in District Of Columbia (NP200003078) and active in the NPI registry since July 2022. He is enrolled in Medicare PECOS and maintains 3 additional practice locations.

NPPES Registry Identity

NPI1023744406
Entity TypeIndividualMale
Primary Taxonomy363LF0000X
Provider Legal NameDR. JAMES GAVIN WALLACE-MERCADOCredential: DNP, MSN, FNP-C
Location Address1350 CONNECTICUT AVE NW STE 1250Washington, DC 20036-1728
Mailing Address1 Embarcadero Ctr Ste 1900San Francisco, CA 94111-3723 · (888) 663-6331
Phone(888) 663-6331
Fax(415) 252-7176
Sole ProprietorNo
Enumeration DateJuly 27, 2022
Last NPPES UpdateMay 25, 20268 updates tracked since enumeration
NPPES CertifiedMay 25, 2026
✔ NPI 1023744406 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNurse Practitioner · FamilyPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363LF0000X
Licenses✔ Licensed in DC · NP200003078✔ Licensed in NM · 76798✔ Licensed in VA · 0024185745✔ Licensed in MS · 908120✔ Licensed in AL · 3-002726✔ Licensed in FL · APRN11033095✔ Licensed in GA · GAA-NP004634✔ Licensed in MD · AC008761✔ Licensed in NY · 358275✔ Licensed in TX · 1168661
1350 CONNECTICUT AVE NW STE 1250, Washington, DC 20036
Open in Google Maps ↗

Secondary Practice Locations 3

Location 13001 Palm Way Ste D134Austin, TX 78758-7963 · Phone (415) 291-0480
Location 26677 Richmond HwyAlexandria, VA 22306-6647 · Phone (703) 535-5568
Location 34540B John Marr DrAnnandale, VA 22003-3308 · Phone (703) 941-6757

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. James Gavin Wallace-mercado Dnp, Msn, Fnp-c is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 20036 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$100.31 typical visit price
range $65.18 – $194.86
Typical copayment $25.07 (range $16.29 – $48.71)
Most-billed visit code 99203
Established Patient
$113.72 typical visit price
range $21.40 – $158.88
Typical copayment $28.43 (range $5.35 – $39.72)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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.

DANIELLE GOESSELE PA-C
Physician Assistant
1350 CONNECTICUT AVE NW STE 1250
WASHINGTON, DC 20036
District of Columbia (888) 663-6331
MRS. TERRI Y. MCGUIRE MPH, MHS, PA-C
Physician Assistant
1350 CONNECTICUT AVE NW STE 1250
WASHINGTON, DC 20036
District of Columbia (888) 663-6331
DR. BARBARA ANITA CLOREY PA-C
Physician Assistant
1350 CONNECTICUT AVE NW STE 1250
WASHINGTON, DC 20036
District of Columbia (202) 627-1901
CHRISTOPHER MAGLIULO
Internal Medicine
1350 CONNECTICUT AVE NW STE 1250
WASHINGTON, DC 20036
District of Columbia (202) 627-1901
KAILA ASHLI LINDO FNP-C
Nurse Practitioner (Family)
1350 CONNECTICUT AVE NW STE 1250
WASHINGTON, DC 20036
District of Columbia (202) 627-1901
MR. JUAN CARLOS FERNANDEZ APRN
Nurse Practitioner
1350 CONNECTICUT AVE NW STE 1250
WASHINGTON, DC 20036
District of Columbia (888) 663-6331
ASHLEY MYERS NP
Nurse Practitioner (Family)
1350 CONNECTICUT AVE NW STE 1250
WASHINGTON, DC 20036
District of Columbia (888) 663-6331
DR. LISA COLE OLIN M.D.
Internal Medicine
1350 CONNECTICUT AVE NW STE 1250
WASHINGTON, DC 20036
District of Columbia (202) 627-1901

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 James Wallace-mercado's NPI number?

The NPI number for James Wallace-mercado is 1023744406. It was assigned to this individual provider in the NPPES registry on July 27, 2022.

Where is James Wallace-mercado located?

James Wallace-mercado practices at 1350 Connecticut Ave NW Ste 1250, Washington, DC 20036. The listed phone number is (888) 663-6331.

What is James Wallace-mercado's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.

Is James Wallace-mercado enrolled in Medicare?

Yes. James Wallace-mercado is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for James Wallace-mercado was last updated on May 25, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.