NPI registry status
Active
2026 NPPES data Rheumatology Physician NPI 1689202350 MD
Verify on CMS → Alyssa Bosso, MD
Rheumatology Physician in Frederick, 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 6,200 in Rheumatology Physician, 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
444
Medicare Part D claims · 113 beneficiaries · Rheumatology Physician avg: 2K
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Alyssa Bosso, MD filed 444 Medicare Part D claims in 2023 as a Rheumatology Physician in Frederick, Maryland.
- 444
- Part D claims, 2023
- Likely
- board-certified (heuristic)
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.
Alyssa Bosso, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
444 Top 38% higher than 62% 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
✓
Board certification likely (heuristic, not verified)
Alyssa Bosso, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 1 hospital affiliation - signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Alyssa Bosso, MD?
Quality data not reportedPrimary specialty
Rheumatology Physician
Medicare Part D claims
444 78% vs specialty avg
Specialty distribution in Maryland
How Rheumatology Physician 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 Rheumatology Physician. 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).
Alyssa Bosso, MD appears in the CMS NPPES registry as a Rheumatology Physician provider holding MD credentials at 161 THOMAS JOHNSON DR STE 250, Frederick, MD, 21702, with a listed phone of (301) 942-7600. NPI 1689202350 was issued on 03/30/2020.
Medicare Part D records for calendar year 2023 show 444 prescription claims written by this provider, covering 113 Medicare beneficiaries and totaling roughly $151K in drug spend.
Rheumatology Physician is a mid-sized specialty nationwide, with 6,200 enrolled providers across 52 states and an average of 2,054 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 | 1689202350 |
|---|---|
| Specialty | Rheumatology Physician |
| Credentials | MD |
| Gender | Female |
| NPI Issued | 03/30/2020 |
Hospital and facility affiliations
Facilities where Alyssa Bosso, MD bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" - a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.
Arthritis And Rheumatism Associates PC
Frederick, MD
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
444
Total Claims
$151K
Total Drug Cost
113
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 835
- Total Day Supply
- 24,547
- Generic Drug Cost
- $15K
Patient Demographics
- Average Patient Age
- 68.9 years
- Avg HCC Risk Score
- 1.91
- Gender Split
- 73% female / 27% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Alyssa Bosso, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Methotrexate
Methotrexate
41 claims
- Prednisone
Prednisone
32 claims
- Hydroxychloroquine…
Hydroxychloroquine Sulfate
28 claims
- Atorvastatin Calcium
Atorvastatin Calcium
24 claims
- Amlodipine Besylate
Amlodipine Besylate
21 claims
- Allopurinol
Allopurinol
18 claims
- Meloxicam 13
Meloxicam
13 claims
- Tamsulosin Hcl 13
Tamsulosin Hcl
13 claims
| Drug | Claims |
|---|---|
| Methotrexate Methotrexate Sodium | 41 |
| Prednisone | 32 |
| Hydroxychloroquine Sulfate | 28 |
| Atorvastatin Calcium | 24 |
| Amlodipine Besylate | 21 |
| Allopurinol | 18 |
| Meloxicam | 13 |
| Tamsulosin Hcl | 13 |
| Finasteride | 12 |
| Gabapentin | 11 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Rheumatology Physician Overview
How Alyssa Bosso, MD fits within the Rheumatology Physician landscape nationally.
6,200
Rheumatology Physician Providers in US
52
States with Rheumatology Physician
2,054
Avg Claims per Provider
Alyssa Bosso, MD's 444 claims are below the specialty average of 2,054.
Nearby Rheumatology Physician Providers in Maryland
Other clinicians with the same primary specialty enrolled in Maryland, drawn from the same CMS NPPES roster as Bosso.
Dr. Jonathan Adelson
M.D.
Greenbelt, MD
Dr. Naila Ahmad
MD
Easton, MD
Dr. Grace Ahn
M.D.
Rockville, MD
Dr. Maria Alba-Dauhajre
MD
Silver Spring, MD
Dr. Jemima Felicity Albayda
MD
Baltimore, MD
Compare Rheumatology Physician 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 Rheumatology Physician 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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Medical Specialties Explained
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Understanding Medicare Claims Data
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How insurance networks affect your costs
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Explore Maryland
Frequently Asked Questions
What is Alyssa Bosso, MD's specialty? ▼
Alyssa Bosso, MD specializes in Rheumatology Physician and practices in Frederick, Maryland. Credentials: MD.
How much does Alyssa Bosso, MD prescribe under Medicare Part D? ▼
In 2023, Alyssa Bosso, MD wrote 444 Medicare Part D claims totaling $151K in drug costs for 113 beneficiaries.
Where is Alyssa Bosso, MD located? ▼
Alyssa Bosso, MD is located at 161 THOMAS JOHNSON DR STE 250, Frederick, MD, 21702. Phone: (301) 942-7600.
What is Alyssa Bosso, MD's NPI number? ▼
Alyssa Bosso, MD's National Provider Identifier (NPI) is 1689202350, issued on 03/30/2020.
How many Rheumatology Physician providers are there in the US? ▼
There are 6,200 Rheumatology Physician providers across 52 states in the US. The average Rheumatology Physician provider writes 2,054 Medicare Part D claims per year.
What drugs does Alyssa Bosso, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Alyssa Bosso, MD's most frequently prescribed drugs include Methotrexate, Prednisone, Hydroxychloroquine Sulfate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Alyssa Bosso, MD accept Medicare? ▼
Alyssa Bosso, MD appears in CMS Medicare data with 444 Part D claims and 113 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Alyssa Bosso, MD's credentials? ▼
Alyssa Bosso, MD's NPI is 1689202350 with credentials MD. 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.