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MASON LANE DUNHAM M.D.
NPI 1225485162
Anesthesiology in Columbia, MD

Active since May 20, 2016PECOS Enrolled
11085 LITTE PATUXENT PARKWAY, MEDICAL ARTS BLDG, 004, COLUMBIA, MD 21044(410) 730-0099(410) 964-1345 Get Directions Write a Review

NPPES record last updated: September 28, 2020. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Sep 28, 2020, May 20, 2016 (2 updates tracked since 2016).

About Mason Lane Dunham M.d. NPPES

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

MASON LANE DUNHAM M.D. (NPI 1225485162) is an individual anesthesiology provider in Columbia, Maryland, licensed in Maryland (D90023) and active in the NPI registry since May 2016. He is enrolled in Medicare PECOS, is affiliated with Johns Hopkins Howard County Medical Center, and is a graduate of University Of Maryland School Of Medicine (2016).

NPPES Registry Identity

NPI1225485162
Entity TypeIndividualMale
Primary Taxonomy207L00000X
Provider Legal NameMASON LANE DUNHAMCredential: M.D.
Location Address11085 LITTE PATUXENT PARKWAY, MEDICAL ARTS BLDG, 004Columbia, MD 21044
Mailing Address9910 Franklin Square Dr Ste 2110Baltimore, MD 21236-4902 · (410) 933-6423
Phone(410) 730-0099
Fax(410) 964-1345
Sole ProprietorNo
Medical School CMSUniversity Of Maryland School Of MedicineGraduated 2016
Enumeration DateMay 20, 2016
Last NPPES UpdateSeptember 28, 20202 updates tracked since enumeration
NPPES CertifiedSeptember 25, 2020
✔ NPI 1225485162 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAnesthesiologyAllopathic & Osteopathic Physicians
Taxonomy Code207L00000X
License✔ Licensed in MD · D90023
Definition
An anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an operation or an obstetric or diagnostic procedure. The anesthesiologist assesses the risk of the patient undergoing surgery and optimizes the patient's condition prior to, during and after surgery. In addition to these management responsibilities, the anesthesiologist provides medical management and consultation in pain management and critical care medicine. Anesthesiologists diagnose and treat acute, long-standing and cancer pain problems; diagnose and treat patients with critical illnesses or severe injuries; direct resuscitation in the care of patients with cardiac or respiratory emergencies, including the need for artificial ventilation; and supervise post-anesthesia recovery.
11085 LITTE PATUXENT PARKWAY, Columbia, MD 21044
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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)

Mason Lane Dunham M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID6507156478
PECOS Enrollment IDI20200826002654
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 Mason Dunham reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Johns Hopkins University
0.9 mi
Body Imaging
10840 LITTLE PATUXENT PKWY
Columbia, MD 21044
  • Reassigned Medicare billing, Maryland enrollment
  • 4,483 clinicians in this Medicare group
NPI 1285453795 (410) 933-0000

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 Howard County Medical Center

Acute Care Hospitals · Columbia, MD
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number210048
Location5755 Cedar LaneColumbia, MD 21044 · Howard County
Emergency services Birthing friendly

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 Mason Dunham's NPI number?

The NPI number for Mason Dunham is 1225485162. It was assigned to this individual provider in the NPPES registry on May 20, 2016.

Where is Mason Dunham located?

Mason Dunham practices at 11085 Litte Patuxent Parkway Medical Arts Bldg, 004, Columbia, MD 21044. The listed phone number is (410) 730-0099.

What is Mason Dunham's specialty?

The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.

Is Mason Dunham enrolled in Medicare?

Yes. Mason Dunham is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Mason Dunham's services?

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

Is Mason Dunham affiliated with any hospitals?

According to CMS data, Mason Dunham is affiliated with Johns Hopkins Howard County Medical Center.

When was this NPI record last updated?

The NPPES record for Mason Dunham was last updated on September 28, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.