NPI registry status
Active
2026 NPPES data Critical Care Medicine (Internal Medicine) Physician NPI 1104862572 M.D.
Verify on CMS → Ari Zaiman, M.D.
Critical Care Medicine (Internal Medicine) Physician in Towson, 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 6,916 in Critical Care Medicine (Internal Medicine) 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
642
Medicare Part D claims · 109 beneficiaries · Critical Care Medicine (Internal Medicine) Physician avg: 1K
Generic prescribing
23%
generic claims · 77% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$51.9
2 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Ari Zaiman, M.D. filed 642 Medicare Part D claims in 2024 as a Critical Care Medicine (Internal Medicine) Physician in Towson, Maryland, prescribing 23% generic.
- 642
- Part D claims, 2024
- 23%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥68th
- pct by Part D claim volume (lower-bound band)
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.
Federal trust snapshot
What official records show about Ari Zaiman, M.D.
Federal records show an active NPI with Medicare Part D prescribing activity — verifiable registry data, not a proprietary rating.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1104862572), first enumerated 06/22/2006.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 642 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
Board certification signal
Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.
- Reported
Hospital affiliations
1 CMS Care Compare hospital affiliation on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- Reported
Industry payment transparency
$51.9 in reported industry payments (2 transfers) in 2024 under the federal Sunshine Act — disclosed transfers of value, not a quality rating.
Source: CMS Open Payments
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
CMS NPPES provider registry desk
NPI 1104862572 · Critical Care Medicine (Internal Medicine) Physician
NPI-10 · ENUM-LEGACY · TAX-MID · RX-LIGHT · BOOK-THIN · PHOTO-ENUM
- NPI-10 1104862572
- ENUM-LEGACY 2006
- TAX-MID 7K Critical Care
- RX-LIGHT 642
- BOOK-THIN 217 in Maryland
- PHOTO-ENUM Patricia Miles · 2006
Ari Zaiman, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
642 ≥ 68th percentile 68% of 1,416,883 prescribers are in lower value bands
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.
The percentile is a conservative 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2024
✓
Board certification likely (heuristic, not verified)
Ari Zaiman, M.D. 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 Ari Zaiman, M.D.?
Quality data not reportedPrimary specialty
Critical Care Medicine (Internal Medicine) Physician
Medicare Part D claims
642 42% vs specialty avg
Specialty distribution in Maryland
How Critical Care Medicine (Internal Medicine) 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 Critical Care Medicine (Internal Medicine) 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).
Practice Address
Provider Details
| NPI | 1104862572 |
|---|---|
| Specialty | Critical Care Medicine (Internal Medicine) Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 06/22/2006 |
Hospital and facility affiliations
Facilities where Ari Zaiman, M.D. 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.
Greater Baltimore Medical Center Inc
Baltimore, 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).
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 Ari Zaiman, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$52
Largest payer
Amgen 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.
Brand vs generic prescribing mix · Brand-heavy
Ari Zaiman, M.D. - brand share 77.0%
Critical Care Medicine (Internal Medicine) Physician average
77% brand-name claims vs 23% generic, on 642 2024 Medicare Part D claims.
The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2024.
642
Total Claims
$447K
Total Drug Cost
109
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 932.8
- Total Day Supply
- 27,249
- Brand vs Generic
- 77% brand / 23% generic
- Brand Drug Cost
- $441K
- Generic Drug Cost
- $6K
- Antibiotic Claims
- 18
Patient Demographics
- Average Patient Age
- 74.6 years
- Avg HCC Risk Score
- 1.67
- Gender Split
- 76% female / 24% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Ari Zaiman, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2024
- Trelegy Ellipta
Trelegy Ellipta
135 claims
- Anoro Ellipta
Anoro Ellipta
78 claims
- Albuterol Sulfate … 52
Albuterol Sulfate Hfa
52 claims
- Spiriva Respimat 36
Spiriva Respimat
36 claims
- Breztri Aerosphere 29
Breztri Aerosphere
29 claims
- Prednisone 27
Prednisone
27 claims
- Breo Ellipta 26
Breo Ellipta
26 claims
- Budesonide-Formote… 24
Budesonide-Formoterol Fumarate
24 claims
| Drug | Claims |
|---|---|
| Trelegy Ellipta Fluticasone/Umeclidin/Vilanter | 135 |
| Anoro Ellipta Umeclidinium Brm/Vilanterol Tr | 78 |
| Albuterol Sulfate Hfa Albuterol Sulfate | 52 |
| Spiriva Respimat Tiotropium Bromide | 36 |
| Breztri Aerosphere Budesonide/Glycopyr/Formoterol | 29 |
| Prednisone | 27 |
| Breo Ellipta Fluticasone/Vilanterol | 26 |
| Budesonide-Formoterol Fumarate Budesonide/Formoterol Fumarate | 24 |
| Ventolin Hfa Albuterol Sulfate | 23 |
| Montelukast Sodium | 21 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Critical Care Medicine (Internal Medicine) Physician in MD →
All providers in Maryland →
Compare specialties →
Critical Care Medicine (Internal Medicine) Physician Overview
How Ari Zaiman, M.D. fits within the Critical Care Medicine (Internal Medicine) Physician landscape nationally.
6,916
Critical Care Medicine (Internal Medicine) Physician Providers in US
53
States with Critical Care Medicine (Internal Medicine) Physician
1,103
Avg Claims per Provider
Ari Zaiman, M.D.'s 642 claims are below the specialty average of 1,103.
Nationwide Critical Care Medicine (Internal Medicine) Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Zaiman, both outside Maryland so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2006)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Critical Care Medicine (Internal Medicine) Physician Providers in Maryland
Other clinicians with the same primary specialty enrolled in Maryland, drawn from the same CMS NPPES roster as Zaiman.
One of 217 Critical Care Medicine (Internal Medicine) Physician providers enrolled in Maryland, 5 are shown here.
Frequently Asked Questions
What is Ari Zaiman, M.D.'s specialty? ▼
Ari Zaiman, M.D. specializes in Critical Care Medicine (Internal Medicine) Physician and practices in Towson, Maryland. Credentials: M.D..
How much does Ari Zaiman, M.D. prescribe under Medicare Part D? ▼
In 2024, Ari Zaiman, M.D. wrote 642 Medicare Part D claims totaling $447K in drug costs for 109 beneficiaries.
Where is Ari Zaiman, M.D. located? ▼
Ari Zaiman, M.D. is located at 6565 N CHARLES ST STE 411, Towson, MD, 21204. Phone: (443) 849-3901.
What is Ari Zaiman, M.D.'s NPI number? ▼
Ari Zaiman, M.D.'s National Provider Identifier (NPI) is 1104862572, issued on 06/22/2006.
Does Ari Zaiman, M.D. prescribe more brand-name or generic drugs? ▼
Ari Zaiman, M.D.'s prescribing is 77% brand-name and 23% generic drugs by claim count, with $441K in brand drug costs.
How many Critical Care Medicine (Internal Medicine) Physician providers are there in the US? ▼
There are 6,916 Critical Care Medicine (Internal Medicine) Physician providers across 53 states in the US. The average Critical Care Medicine (Internal Medicine) Physician provider writes 1,103 Medicare Part D claims per year.
What drugs does Ari Zaiman, M.D. prescribe most often? ▼
Based on 2024 Medicare Part D data, Ari Zaiman, M.D.'s most frequently prescribed drugs include Trelegy Ellipta, Anoro Ellipta, Albuterol Sulfate Hfa. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Ari Zaiman, M.D. accept Medicare? ▼
Ari Zaiman, M.D. appears in CMS Medicare data with 642 Part D claims and 109 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Ari Zaiman, M.D.'s credentials? ▼
Ari Zaiman, M.D.'s NPI is 1104862572 with credentials M.D.. 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 (2024). 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 August 2026 (NPPES) / 2024 (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
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 August 2026.