NPI registry status
Active
2026 NPPES data Medical Physician Assistant NPI 1609591403 PA-C
Verify on CMS → Mary Anderson, PA-C
Medical Physician Assistant in Baltimore, 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 40,580 in Medical Physician Assistant, 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
230
Medicare Part D claims · 84 beneficiaries · Medical Physician Assistant avg: 1K
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Mary Anderson, PA-C filed 230 Medicare Part D claims in 2023 as a Medical Physician Assistant in Baltimore, Maryland.
- 230
- Part D claims, 2023
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 Anderson, PA-C's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
230 49th percentile higher than 49% 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 Anderson, PA-C?
Quality data not reportedPrimary specialty
Medical Physician Assistant
Medicare Part D claims
230 79% vs specialty avg
Specialty distribution in Maryland
How Medical Physician Assistant 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 Medical Physician Assistant. 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 Anderson, PA-C appears in the CMS NPPES registry as a Medical Physician Assistant provider holding PA-C credentials at 1800 ORLEANS ST, Baltimore, MD, 21287, with a listed phone of (410) 955-5000. NPI 1609591403 was issued on 10/05/2022.
Medicare Part D records for calendar year 2023 show 230 prescription claims written by this provider, covering 84 Medicare beneficiaries and totaling roughly $7K in drug spend, with an opioid prescribing rate of 21.7%.
Medical Physician Assistant is a mid-sized specialty nationwide, with 40,580 enrolled providers across 55 states and an average of 1,077 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 | 1609591403 |
|---|---|
| Specialty | Medical Physician Assistant |
| Credentials | PA-C |
| Gender | Female |
| NPI Issued | 10/05/2022 |
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
230
Total Claims
$7K
Total Drug Cost
84
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 232
- Total Day Supply
- 3,186
- Generic Drug Cost
- $6K
- Opioid Claims
- 50 (21.7% rate)
- Antibiotic Claims
- 21
Patient Demographics
- Average Patient Age
- 68.4 years
- Avg HCC Risk Score
- 1.05
- Gender Split
- 52% female / 48% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Mary Anderson, PA-C prescribes most
Top Medicare Part D drugs by claim count, 2023
- Oxycodone Hcl
Oxycodone Hcl
42 claims
- Naloxone Hcl
Naloxone Hcl
28 claims
- Dexamethasone
Dexamethasone
22 claims
- Levetiracetam
Levetiracetam
20 claims
- Cyclobenzaprine Hcl
Cyclobenzaprine Hcl
17 claims
- Cephalexin 16
Cephalexin
16 claims
- Pantoprazole Sodium 13
Pantoprazole Sodium
13 claims
| Drug | Claims |
|---|---|
| Oxycodone Hcl | 42 |
| Naloxone Hcl | 28 |
| Dexamethasone | 22 |
| Levetiracetam | 20 |
| Cyclobenzaprine Hcl | 17 |
| Cephalexin | 16 |
| Pantoprazole Sodium | 13 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Medical Physician Assistant Overview
How Mary Anderson, PA-C fits within the Medical Physician Assistant landscape nationally.
40,580
Medical Physician Assistant Providers in US
55
States with Medical Physician Assistant
1,077
Avg Claims per Provider
Mary Anderson, PA-C's 230 claims are below the specialty average of 1,077.
Nearby Medical Physician Assistant Providers in Maryland
Other clinicians with the same primary specialty enrolled in Maryland, drawn from the same CMS NPPES roster as Anderson.
Dr. Dalia Abaza
PA-C
Bel Air, MD
Dr. Jenifer Abbott
P.A.-C
Havre De Grace, MD
Dr. Eyoatam Abebe
PA-C
Baltimore, MD
Dr. Asma Abeer
PA-C
Baltimore, MD
Dr. David Abell
PA
Harwood, MD
Compare Medical Physician Assistant 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 Medical Physician Assistant 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
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How to Find a Doctor
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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 Anderson, PA-C's specialty? ▼
Mary Anderson, PA-C specializes in Medical Physician Assistant and practices in Baltimore, Maryland. Credentials: PA-C.
How much does Mary Anderson, PA-C prescribe under Medicare Part D? ▼
In 2023, Mary Anderson, PA-C wrote 230 Medicare Part D claims totaling $7K in drug costs for 84 beneficiaries.
Where is Mary Anderson, PA-C located? ▼
Mary Anderson, PA-C is located at 1800 ORLEANS ST, Baltimore, MD, 21287. Phone: (410) 955-5000.
What is Mary Anderson, PA-C's NPI number? ▼
Mary Anderson, PA-C's National Provider Identifier (NPI) is 1609591403, issued on 10/05/2022.
Does Mary Anderson, PA-C prescribe opioids? ▼
Yes, Mary Anderson, PA-C had 50 opioid claims in 2023 with an opioid prescribing rate of 21.7%.
How many Medical Physician Assistant providers are there in the US? ▼
There are 40,580 Medical Physician Assistant providers across 55 states in the US. The average Medical Physician Assistant provider writes 1,077 Medicare Part D claims per year.
What drugs does Mary Anderson, PA-C prescribe most often? ▼
Based on 2023 Medicare Part D data, Mary Anderson, PA-C's most frequently prescribed drugs include Oxycodone Hcl, Naloxone Hcl, Dexamethasone. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Mary Anderson, PA-C accept Medicare? ▼
Mary Anderson, PA-C appears in CMS Medicare data with 230 Part D claims and 84 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Mary Anderson, PA-C's credentials? ▼
Mary Anderson, PA-C's NPI is 1609591403 with credentials PA-C. 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.