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DR. MARC ADDISON CALLENDER M.D.
NPI 1578736682
Pediatrics in Annapolis, MD

Active since April 09, 2008PECOS Enrolled
2001 MEDICAL PKWY, ANNAPOLIS, MD 21401(443) 481-6968(443) 481-6322 Get Directions Write a Review

NPPES record last updated: December 8, 2013. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Dr. Marc Addison Callender M.d. NPPES

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

DR. MARC ADDISON CALLENDER M.D. (NPI 1578736682) is an individual pediatrics provider in Annapolis, Maryland, licensed in Maryland (21906) and active in the NPI registry since April 2008. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1578736682
Entity TypeIndividualMale
Primary Taxonomy208000000X
Provider Legal NameDR. MARC ADDISON CALLENDERCredential: M.D.
Location Address2001 MEDICAL PKWYAnnapolis, MD 21401-3280
Mailing AddressPo Box 12622Belfast, ME 04915-4017 · (443) 481-6482 · Fax (443) 481-6515
Phone(443) 481-6968
Fax(443) 481-6322
Sole ProprietorNo
Enumeration DateApril 9, 2008
Last NPPES UpdateDecember 8, 2013
✔ NPI 1578736682 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatricsAllopathic & Osteopathic Physicians
Taxonomy Code208000000X
License✔ Licensed in MD · 21906
Definition
A pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectrum of health services ranging from preventive healthcare to the diagnosis and treatment of acute and chronic diseases. A pediatrician deals with biological, social and environmental influences on the developing child, and with the impact of disease and dysfunction on development.
2001 MEDICAL PKWY, Annapolis, MD 21401
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Other Identifiers 1

OtherY1220012Carefirst

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Oscar Health.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Marc Addison Callender M.d. 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.

Medicare Billing Reassignment

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

University Of Maryland St. Joseph Medical Group, LLC
28 mi
Surgical Assistant
7601 OSLER DR
Towson, MD 21204
  • Reassigned Medicare billing, Maryland enrollment
  • 501 clinicians in this Medicare group
NPI 1053816074 (410) 337-1379

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 21401 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
$94.08 typical visit price
range $60.73 – $183.44
Typical copayment $23.52 (range $15.18 – $45.86)
Most-billed visit code 99203
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.

GASHAW ADUGNA M.D
Internal Medicine
2001 MEDICAL PKWY
ANNAPOLIS, MD 21401
Anne Arundel County (240) 495-4189
DR. VANESSA MONSALVE-GOMEZ MD
Student in an Organized Health Care Education/Training Program
2001 MEDICAL PKWY
ANNAPOLIS, MD 21401
Anne Arundel County (443) 481-5543
HEATHER ZACK
General Acute Care Hospital
2001 MEDICAL PKWY
ANNAPOLIS, MD 21401
Anne Arundel County (443) 927-6383
SARAH LYNN HERN LCSW-C
Counselor (Mental Health)
2001 MEDICAL PKWY
ANNAPOLIS, MD 21401
Anne Arundel County (443) 481-1272
RIYO RAJAN PHARMD
Pharmacist (Oncology)
2001 MEDICAL PKWY
ANNAPOLIS, MD 21401
Anne Arundel County (443) 481-4157
DIMENSIONS HEALTHCARE ASSOCIATES INC
Obstetrics & Gynecology
2001 MEDICAL PKWY
ANNAPOLIS, MD 21401
Anne Arundel County (443) 481-1000
ERIC HADHAZY
Student in an Organized Health Care Education/Training Program
2001 MEDICAL PKWY
ANNAPOLIS, MD 21401
Anne Arundel County (443) 481-4142
ANNE ARUNDEL MEDICAL CENTER
General Acute Care Hospital
2001 MEDICAL PKWY
ANNAPOLIS, MD 21401
Anne Arundel County (443) 481-1000

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 Marc Callender's NPI number?

The NPI number for Marc Callender is 1578736682. It was assigned to this individual provider in the NPPES registry on April 9, 2008.

Where is Marc Callender located?

Marc Callender practices at 2001 Medical Pkwy, Annapolis, MD 21401. The listed phone number is (443) 481-6968.

What is Marc Callender's specialty?

The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.

Is Marc Callender enrolled in Medicare?

Yes. Marc Callender is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Marc Callender's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Marc Callender reassigns Medicare benefits to University Of Maryland St. Joseph Medical Group, LLC (Towson, 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 Marc Callender's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Marc Callender accept?

Health plans from Oscar Health list Marc Callender as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Marc Callender was last updated on December 8, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.