NPI registry status
Active
2026 NPPES data Periodontics NPI 1588828073 DDS
Verify on CMS → Mary Alexander, DDS
Periodontics in Silver Spring, Maryland.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 6,061 in Periodontics, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
43
Medicare Part D claims · 19 beneficiaries · Periodontics avg: 264
Industry payments
$109.83
5 payments · CMS Open Payments (Sunshine Act)
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Mary Alexander, DDS filed 43 Medicare Part D claims in 2023 as a Periodontics in Silver Spring, Maryland.
- 43
- Part D claims, 2023
- $109.83
- industry payments (Sunshine Act)
Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.
Mary Alexander, DDS's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
43 0th percentile higher than 0% of 1,370,886 prescribers
Each bar is a band; taller bars hold more prescribers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source CMS Medicare Part D Prescriber Public Use File · 2023
What does the federal data show about Mary Alexander, DDS?
Quality data not reportedPrimary specialty
Periodontics
Medicare Part D claims
43 84% vs specialty avg
Specialty distribution in Maryland
How Periodontics compares to other specialties among Maryland providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Periodontics. Verify directly:
How MIPS and board certification work
The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.
Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).
Mary Alexander, DDS appears in the CMS NPPES registry as a Periodontics provider holding DDS credentials at 800 BALBOA DR, Silver Spring, MD, 20905, with a listed phone of (301) 928-6890. NPI 1588828073 was issued on 07/14/2008.
Medicare Part D records for calendar year 2023 show 43 prescription claims written by this provider, covering 19 Medicare beneficiaries and totaling roughly $214 in drug spend.
Periodontics is a mid-sized specialty nationwide, with 6,061 enrolled providers across 53 states and an average of 264 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline.
Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist, always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.
Practice Address
Provider Details
| NPI | 1588828073 |
|---|---|
| Specialty | Periodontics |
| Credentials | DDS |
| Gender | Female |
| NPI Issued | 07/14/2008 |
Industry payments received (2024) - CMS Open Payments transparency data
The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for Mary Alexander, DDS. Source: openpaymentsdata.cms.gov.
Total received
$110
Largest payer
ZIMVIE INC.
Most common payment type
Food and Beverage
Industry payments are not necessarily indicators of bias, they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
43
Total Claims
$214
Total Drug Cost
19
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 43
- Total Day Supply
- 416
- Generic Drug Cost
- $190
- Antibiotic Claims
- 17
Patient Demographics
- Average Patient Age
- 71.6 years
- Avg HCC Risk Score
- 0.70
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
| Drug | Claims |
|---|---|
| Amoxicillin | 11 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Periodontics Overview
How Mary Alexander, DDS fits within the Periodontics landscape nationally.
6,061
Periodontics Providers in US
53
States with Periodontics
264
Avg Claims per Provider
Mary Alexander, DDS's 43 claims are below the specialty average of 264.
Nearby Periodontics Providers in Maryland
Other clinicians with the same primary specialty enrolled in Maryland, drawn from the same CMS NPPES roster as Alexander.
Dr. Mary Aichelmann-Reidy
DDS
Baltimore, MD
Dr. Reiaz Ali
D.D.S., M.S.
Clinton, MD
Dr. Augusto Araujo
D.M.D.
Chevy Chase, MD
Dr. Judith Austin
D.M.D.
Rockville, MD
Dr. Salar Azad
DDS
Frederick, MD
Compare Periodontics nationally: see state-by-state distribution →
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the Maryland medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Periodontics peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
Healthcare Guides
Learn more about finding, verifying, and understanding healthcare providers.
How to Find a Doctor
Step-by-step guide to choosing a provider
Verify Credentials
Check NPI, board certification & license status
Medical Specialties Explained
Who treats what and how specialties differ
Understanding Medicare Claims Data
What prescribing data reveals about a provider
In-Network vs Out-of-Network
How insurance networks affect your costs
Telehealth Guide
Virtual care options and coverage in 2026
Explore Maryland
Frequently Asked Questions
What is Mary Alexander, DDS's specialty? ▼
Mary Alexander, DDS specializes in Periodontics and practices in Silver Spring, Maryland. Credentials: DDS.
How much does Mary Alexander, DDS prescribe under Medicare Part D? ▼
In 2023, Mary Alexander, DDS wrote 43 Medicare Part D claims totaling $214 in drug costs for 19 beneficiaries.
Where is Mary Alexander, DDS located? ▼
Mary Alexander, DDS is located at 800 BALBOA DR, Silver Spring, MD, 20905. Phone: (301) 928-6890.
What is Mary Alexander, DDS's NPI number? ▼
Mary Alexander, DDS's National Provider Identifier (NPI) is 1588828073, issued on 07/14/2008.
How many Periodontics providers are there in the US? ▼
There are 6,061 Periodontics providers across 53 states in the US. The average Periodontics provider writes 264 Medicare Part D claims per year.
What drugs does Mary Alexander, DDS prescribe most often? ▼
Based on 2023 Medicare Part D data, Mary Alexander, DDS's most frequently prescribed drugs include Amoxicillin. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Mary Alexander, DDS accept Medicare? ▼
Mary Alexander, DDS appears in CMS Medicare data with 43 Part D claims and 19 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Mary Alexander, DDS's credentials? ▼
Mary Alexander, DDS's NPI is 1588828073 with credentials DDS. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.
Data Sources
View source datasets and methodology notes
- Provider Directory
- CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
- Specialty Classification
- NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
- Prescribing Data
- CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
- Limitations
- Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.
See our complete data methodology for details on how we collect and process government data.
Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).
Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology
Compiled from official public sources by the PlainDoctor editorial team.