Serena Mao, MD, PHD
Radiation Oncology (CMS) · Bethesda, MD
At a glance
6420 Rockledge Dr Ste 1200, Bethesda, MD 20817-7839
NPPES record updated Oct 12, 2026. Public records can lag behind changes at a practice.
Before you call: a quick checklist
- Are you accepting new patients?
- Do you accept my specific insurance plan?
- Do you provide the service I need at this address?
- Do I need a referral, and what is the earliest appointment?
Insurance participation and appointment availability are not established by these public records.
Medicare & insurance
Insurance participation is not established by these public records. Ask the practice and your insurer about your specific plan and this location.
How to check your coverage
Use your plan’s provider directory or the member-services number on your insurance card. Confirm the clinician, practice address, service, and whether a referral is required. A missing opt-out record does not establish Medicare acceptance.
Check the official Medicare directory ↗Practice location
6420 Rockledge Dr Ste 1200Bethesda, MD 20817-7839
Additional reported practice locations
1800 Orleans StBaltimore, MD 212870010
Phone: 4105022037 5255 Loughboro Rd Nw # Nlw
Washington, DC 200162633
Phone: 2025374000 401 N Broadway St Ste 1440
Baltimore, MD 212870019
Phone: 4109557390
Education & affiliations
- Medical / professional school
- Albert Einstein College Of Medicine Of Yeshiva University
- Graduation year
- 2020
- CMS specialties
- Radiation Oncology
Practice groups
Reported hospital affiliations
- George Washington Univ Hospital Washington, DC
- Johns Hopkins Hospital, The Baltimore, MD
Graduation year does not establish years in practice. A reported affiliation does not establish employment, current admitting privileges, or insurance participation.
Source: CMS National Downloadable File · Published Oct 15, 2026.
Source: CMS Facility Affiliation Data · Published Oct 15, 2026.
Procedures in the public data
Reported activity can help you ask more informed questions about a practice’s services.
No displayed procedure-category record in this release. This does not mean the clinician performs no procedures.
CMS uses a one-year claims window with a reporting lag. Counts cover the Medicare activity included by CMS, not all patients. “1–10” is a published range. Volume is not a quality or outcomes score. Coverage and methodology
Source: CMS Utilization Data · Published Oct 15, 2026.
Service-mix comparison is unavailable for this NPI in the imported Medicare service file.
Industry-reported general payments
Includes reported transfers of value, such as meals, travel, or consulting. Payments do not establish improper conduct or quality of care. Research funding and ownership values are excluded from this total.
See payment purposes and reporting companies
Reported purposes
| Purpose | Amount |
|---|---|
| Food and beverage | $259.78 |
Reporting companies
| Company | Amount |
|---|---|
| BOSTON SCIENTIFIC CORPORATION | $86.23 |
| MERCK SHARP & DOHME LLC | $63.75 |
| ASTRAZENECA PHARMACEUTICALS LP | $33.07 |
| SPRINGWORKS THERAPEUTICS, INC. | $25.96 |
| SIEMENS MEDICAL SOLUTIONS USA, INC. | $25.94 |
| NOVOCURE INC. | $24.83 |
Source: CMS 2025 payments grouped by covered recipient and nature of payments · Published Jun 30, 2026.
Professional details: NPI, taxonomy & registry record
Registry details
- Primary taxonomy
- Radiation Oncology (CMS)
- Taxonomy code
- 2085R0001X
- Enumeration date
- Mar 24, 2020
- Record updated
- Oct 12, 2026
More registry details
- Provider type
- Individual · Type 1
- Reported credentials
- MD, PHD
Reported taxonomies and licenses
2085R0001X
License reported: MD600003625 DC
2085R0001X · Primary
License reported: D0107136 MD
License numbers and credentials are reported to NPPES; HCPList does not independently verify them.
Practice location
6420 Rockledge Dr Ste 1200Bethesda, MD 20817-7839
- Phone
- (301) 896-2012
Mailing address
6201 GREENLEIGH AVE FL 2MIDDLE RIVER, MD 212202004
Information may be outdated or incomplete. Confirm details directly with the practice. HCPList is an independent directory and is not affiliated with CMS.
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