NPI registry status
Active
2026 NPPES data Pulmonary Disease Physician NPI 1104851609 MD
Verify on CMS → Nicolas Nassar, MD
Pulmonary Disease Physician in San Bernardino, California.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 9,323 in Pulmonary Disease 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
1K
Medicare Part D claims · 183 beneficiaries · Pulmonary Disease Physician avg: 1K
Generic prescribing
82%
generic claims · 18% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
3/100
▼ 80 pts below national avg 83.1 · Penalty band
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Nicolas Nassar, MD reported a CMS MIPS final score of 3/100 - below the 83.1 national average - and filed 1,149 Medicare Part D claims in 2023.
- 3/100
- MIPS score · -80 vs avg
- 1K
- Part D claims, 2023
- 82%
- generic prescribing
- 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.
Nicolas Nassar, MD's MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
3 1st percentile higher than 1% of 477,587 scored providers
Each bar is a band; taller bars hold more scored providers. 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 Merit-based Incentive Payment System (MIPS) · 2023
Where Nicolas Nassar, MD sits
This provider among pulmonary disease physician peers
Across the 2,676 pulmonary disease physician providers who report both Medicare Part D prescribing and a MIPS quality score, Nicolas Nassar, MD writes more Part D claims than 51% of them and scores higher on MIPS quality than 0% - placing this provider in the high-volume, lower-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Part D claim volume vs MIPS quality, by specialty percentile
Each dot is one pulmonary disease physician peer from a representative sample of 60; the gold marker is Nicolas Nassar, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Nicolas Nassar, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting - 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 Nicolas Nassar, MD?
Below national averagePrimary specialty
Pulmonary Disease Physician
Medicare Part D claims
1,149 21% vs specialty avg
MIPS final score
3/100 80.1 pts vs avg
Specialty distribution in California
How Pulmonary Disease Physician compares to other specialties among California providers
Medicare quality performance, MIPS
Nicolas Nassar, MD's 2023 MIPS final score plotted against the Pulmonary Disease Physician national average
- MIPS Final Score
- 3/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Pulmonary Disease Physician) - 3/100 vs national avg 83.1
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).
Nicolas Nassar, MD appears in the CMS NPPES registry as a Pulmonary Disease Physician provider holding MD credentials at 1881 COMMERCENTER E STE 118, San Bernardino, CA, 92408, with a listed phone of (909) 886-1600. NPI 1104851609 was issued on 07/12/2006.
Medicare Part D records for calendar year 2023 show 1,149 prescription claims written by this provider, covering 183 Medicare beneficiaries and totaling roughly $117K in drug spend, split 18% brand-name and 82% generic by claim count. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 3/100 for the 2023 performance year (Quality 0, Cost 10), compared with the national average of 83.1.
Pulmonary Disease Physician is a mid-sized specialty nationwide, with 9,323 enrolled providers across 53 states and an average of 1,457 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 | 1104851609 |
|---|---|
| Specialty | Pulmonary Disease Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 07/12/2006 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
3
Final Score
Avg: 83.1
0
Quality
10
Cost
Reporting: Individual
License & disciplinary context - California MBC 2023 annual report
Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~150K California medical licensees in 2023 - they are NOT specific to Nicolas Nassar, MD. To verify Nicolas Nassar, MD's current license status, search the MBC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
576
Total board actions, California 2023
Across 556 cases
3.84
Actions per 1,000 licensees
California statewide rate
probation
Most common action type
186 cases
MBC publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the California disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Typical
Nicolas Nassar, MD - brand share 18.0%
Pulmonary Disease Physician average
18% brand-name claims vs 82% generic, on 1,149 2023 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 2023.
1,149
Total Claims
$117K
Total Drug Cost
183
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,235
- Total Day Supply
- 19,912
- Brand vs Generic
- 18% brand / 82% generic
- Brand Drug Cost
- $72K
- Generic Drug Cost
- $45K
- Antibiotic Claims
- 39
Patient Demographics
- Average Patient Age
- 70.2 years
- Avg HCC Risk Score
- 4.12
- Gender Split
- 44% female / 56% male
- Age Distribution
- <65: 30, 65-74: 88, 75-84: 50, 85+: 15
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Nicolas Nassar, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Ipratropium-Albute…
Ipratropium-Albuterol
263 claims
- Chlorhexidine Gluc…
Chlorhexidine Gluconate
146 claims
- Ipratropium Bromide
Ipratropium Bromide
108 claims
- Albuterol Sulfate 71
Albuterol Sulfate
71 claims
- Levalbuterol Hcl 63
Levalbuterol Hcl
63 claims
- Albuterol Sulfate … 59
Albuterol Sulfate Hfa
59 claims
- Flovent Diskus 47
Flovent Diskus
47 claims
- Budesonide 42
Budesonide
42 claims
| Drug | Claims |
|---|---|
| Ipratropium-Albuterol Ipratropium/Albuterol Sulfate | 263 |
| Chlorhexidine Gluconate | 146 |
| Ipratropium Bromide | 108 |
| Albuterol Sulfate | 71 |
| Levalbuterol Hcl | 63 |
| Albuterol Sulfate Hfa Albuterol Sulfate | 59 |
| Flovent Diskus Fluticasone Propionate | 47 |
| Budesonide | 42 |
| Prednisone | 31 |
| Ventolin Hfa Albuterol Sulfate | 29 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Pulmonary Disease Physician Overview
How Nicolas Nassar, MD fits within the Pulmonary Disease Physician landscape nationally.
9,323
Pulmonary Disease Physician Providers in US
53
States with Pulmonary Disease Physician
1,457
Avg Claims per Provider
Nicolas Nassar, MD's 1,149 claims are below the specialty average of 1,457.
Nearby Pulmonary Disease Physician Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Nassar.
Dr. Manoochehr Abadian Sharifabad
M.D.
Fountain Valley, CA
Dr. Mohamad Abdelfattah
MD
Fullerton, CA
Dr. Zainab Abdulsada
MBCHB
Sacramento, CA
Dr. Ayham Aboeed
M.D.
Bakersfield, CA
Dr. Babak Abrishami
D.O.
Los Angeles, CA
Compare Pulmonary Disease 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 California medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Pulmonary Disease 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.
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Frequently Asked Questions
What is Nicolas Nassar, MD's specialty? ▼
Nicolas Nassar, MD specializes in Pulmonary Disease Physician and practices in San Bernardino, California. Credentials: MD.
How much does Nicolas Nassar, MD prescribe under Medicare Part D? ▼
In 2023, Nicolas Nassar, MD wrote 1,149 Medicare Part D claims totaling $117K in drug costs for 183 beneficiaries.
What is Nicolas Nassar, MD's Medicare quality score? ▼
Nicolas Nassar, MD has a CMS MIPS Final Score of 3/100 (Quality: 0, Cost: 10). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Nicolas Nassar, MD located? ▼
Nicolas Nassar, MD is located at 1881 COMMERCENTER E STE 118, San Bernardino, CA, 92408. Phone: (909) 886-1600.
What is Nicolas Nassar, MD's NPI number? ▼
Nicolas Nassar, MD's National Provider Identifier (NPI) is 1104851609, issued on 07/12/2006.
Does Nicolas Nassar, MD prescribe more brand-name or generic drugs? ▼
Nicolas Nassar, MD's prescribing is 18% brand-name and 82% generic drugs by claim count, with $72K in brand drug costs.
How many Pulmonary Disease Physician providers are there in the US? ▼
There are 9,323 Pulmonary Disease Physician providers across 53 states in the US. The average Pulmonary Disease Physician provider writes 1,457 Medicare Part D claims per year.
What drugs does Nicolas Nassar, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Nicolas Nassar, MD's most frequently prescribed drugs include Ipratropium-Albuterol, Chlorhexidine Gluconate, Ipratropium Bromide. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Nicolas Nassar, MD accept Medicare? ▼
Nicolas Nassar, MD appears in CMS Medicare data with 1,149 Part D claims and 183 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Nicolas Nassar, MD's credentials? ▼
Nicolas Nassar, MD's NPI is 1104851609 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.
- Quality Performance
- CMS Merit-based Incentive Payment System (MIPS) - 2023 performance year.
- 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.