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DR. AARON WATKINS JAMES M.D.
NPI 1326304056
Pathology - Anatomic Pathology in Baltimore, MD

Active since April 06, 2012PECOS Enrolled
4940 EASTERN AVE, A BLDG, 1ST FLOOR, RM AA154, BALTIMORE, MD 21224(410) 550-4841 Get Directions Write a Review

NPPES record last updated: August 8, 2016. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Dr. Aaron Watkins James M.d. NPPES

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

DR. AARON WATKINS JAMES M.D. (NPI 1326304056) is an individual anatomic pathology provider in Baltimore, Maryland, licensed in Maryland (D82031) and active in the NPI registry since April 2012. He is enrolled in Medicare PECOS, is affiliated with Johns Hopkins Hospital, The, and is a graduate of University Of California, San Francisco School Of Medicine (2010).

NPPES Registry Identity

NPI1326304056
Entity TypeIndividualMale
Primary Taxonomy207ZP0101X
Provider Legal NameDR. AARON WATKINS JAMESCredential: M.D.
Location Address4940 EASTERN AVE, A BLDG, 1ST FLOOR, RM AA154Baltimore, MD 21224-2735
Mailing AddressPo Box 64478Baltimore, MD 21264-4478
Phone(410) 550-4841
Sole ProprietorNo
Medical School CMSUniversity Of California, San Francisco School Of MedicineGraduated 2010
Enumeration DateApril 6, 2012
Last NPPES UpdateAugust 8, 2016
✔ NPI 1326304056 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPathology · Anatomic PathologyAllopathic & Osteopathic Physicians
Taxonomy Code207ZP0101X
License✔ Licensed in MD · D82031
Definition
A pathologist deals with the causes and nature of disease and contributes to diagnosis, prognosis and treatment through knowledge gained by the laboratory application of the biologic, chemical and physical sciences. A pathologist uses information gathered from the microscopic examination of tissue specimens, cells and body fluids, and from clinical laboratory tests on body fluids and secretions for the diagnosis, exclusion and monitoring of disease.
4940 EASTERN AVE, Baltimore, MD 21224
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Aaron Watkins James M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID2163700998
PECOS Enrollment IDI20161031000676
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.

Medicare Billing Reassignment

Medicare enrollment records show Aaron James reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Johns Hopkins University
0.4 mi
Clinical Medical Laboratory
5501 HOPKINS BAYVIEW CIR, ROOM 1A20
Baltimore, MD 21224
  • Reassigned Medicare billing, Maryland enrollment
  • 4,483 clinicians in this Medicare group
NPI 1306810619 (410) 550-3362

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Johns Hopkins Hospital, The

Acute Care Hospitals · Baltimore, MD
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number210009
Location600 North Wolfe StreetBaltimore, MD 21287 · Baltimore City County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 21224 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
$139.05 typical visit price
range $60.73 – $183.44
Typical copayment $34.76 (range $15.18 – $45.86)
Most-billed visit code 99204
Established Patient
$106.59 typical visit price
range $19.60 – $149.17
Typical copayment $26.64 (range $4.90 – $37.29)
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.

DR. SUSRUTHA KOTWAL MD
Internal Medicine
4940 EASTERN AVE, MFL BLDG, WEST TOWER, 6TH FLOOR
BALTIMORE, MD 21224
Baltimore City (410) 550-5018
DR. SAMANTHA A WOLFE MD
Otolaryngology
4940 EASTERN AVE
BALTIMORE, MD 21224
Baltimore City (410) 550-2370
MARK MILEY PA-C
Physician Assistant
4940 EASTERN AVE
BALTIMORE, MD 21224
Baltimore City (410) 550-9227
REID C. WILKINS MD
Pathology (Anatomic Pathology & Clinical Pathology)
4940 EASTERN AVE
BALTIMORE, MD 21224
Baltimore City (410) 550-5568
DEREK MASON MD, MPH
Student in an Organized Health Care Education/Training Program
4940 EASTERN AVE
BALTIMORE, MD 21224
Baltimore City (410) 550-0100
RUCHITA SUDHIR PENDSE MD
Obstetrics & Gynecology
4940 EASTERN AVE
BALTIMORE, MD 21224
Baltimore City (410) 550-5568
VIVIANA KATHERINE PEARSON NEONATAL NURSE PRACT
Registered Nurse (Neonatal Intensive Care)
4940 EASTERN AVE
BALTIMORE, MD 21224
Baltimore City (443) 297-7701
BRUCE ROBERT GIBSON M.D.
Surgery
4940 EASTERN AVE
BALTIMORE, MD 21224
Baltimore City (410) 550-0100

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 Aaron James's NPI number?

The NPI number for Aaron James is 1326304056. It was assigned to this individual provider in the NPPES registry on April 6, 2012.

Where is Aaron James located?

Aaron James practices at 4940 Eastern Ave A Bldg, 1st Floor, Rm Aa154, Baltimore, MD 21224. The listed phone number is (410) 550-4841.

What is Aaron James's specialty?

The primary specialty registered for this NPI is Pathology, specializing in Anatomic Pathology, with taxonomy code 207ZP0101X.

Is Aaron James enrolled in Medicare?

Yes. Aaron James is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Aaron James's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Aaron James reassigns Medicare benefits to Johns Hopkins University (Baltimore, MD). The 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 Aaron James's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Aaron James affiliated with any hospitals?

According to CMS data, Aaron James is affiliated with Johns Hopkins Hospital, The.

When was this NPI record last updated?

The NPPES record for Aaron James was last updated on August 8, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 years 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.