NPI registry status
Active
2026 NPPES data Critical Care Medicine (Internal Medicine) Physician NPI 1992992440 MD
Verify on CMS → Catherine Lazar, MD
Critical Care Medicine (Internal Medicine) Physician in Lafayette, Colorado.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 6,646 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
627
Medicare Part D claims · 166 beneficiaries · Critical Care Medicine (Internal Medicine) Physician avg: 1K
Generic prescribing
54%
generic claims · 46% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Catherine Lazar, MD filed 627 Medicare Part D claims in 2023 as a Critical Care Medicine (Internal Medicine) Physician in Lafayette, Colorado, prescribing 54% generic.
- 627
- Part D claims, 2023
- 54%
- generic prescribing
- ≥69th
- 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.
Catherine Lazar, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
627 ≥ 69th percentile 69% of 1,370,886 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 · 2023
◑
Board-eligible specialty (heuristic, not verified)
Catherine Lazar, MD practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Catherine Lazar, MD?
Quality data not reportedPrimary specialty
Critical Care Medicine (Internal Medicine) Physician
Medicare Part D claims
627 41% vs specialty avg
Specialty distribution in Colorado
How Critical Care Medicine (Internal Medicine) Physician compares to other specialties among Colorado 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).
Catherine Lazar, MD appears in the CMS NPPES registry as a Critical Care Medicine (Internal Medicine) Physician provider holding MD credentials at 280 EXEMPLA CIR, Lafayette, CO, 80026, with a listed phone of (303) 338-4545. NPI 1992992440 was issued on 09/28/2007.
Medicare Part D records for calendar year 2023 show 627 prescription claims written by this provider, covering 166 Medicare beneficiaries and totaling roughly $245K in drug spend, split 46% brand-name and 54% generic by claim count.
Critical Care Medicine (Internal Medicine) Physician is a mid-sized specialty nationwide, with 6,646 enrolled providers across 53 states and an average of 1,069 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 | 1992992440 |
|---|---|
| Specialty | Critical Care Medicine (Internal Medicine) Physician |
| Credentials | MD |
| Gender | Female |
| NPI Issued | 09/28/2007 |
Brand vs generic prescribing mix · Above average
Catherine Lazar, MD - brand share 46.0%
Critical Care Medicine (Internal Medicine) Physician average
46% brand-name claims vs 54% generic, on 627 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.
627
Total Claims
$245K
Total Drug Cost
166
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,255
- Total Day Supply
- 36,036
- Brand vs Generic
- 46% brand / 54% generic
- Brand Drug Cost
- $208K
- Generic Drug Cost
- $37K
- Antibiotic Claims
- 62
Patient Demographics
- Average Patient Age
- 74.9 years
- Avg HCC Risk Score
- 1.95
- Gender Split
- 60% female / 40% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Catherine Lazar, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Prednisone
Prednisone
91 claims
- Albuterol Sulfate …
Albuterol Sulfate Hfa
75 claims
- Spiriva Respimat
Spiriva Respimat
60 claims
- Wixela Inhub
Wixela Inhub
58 claims
- Alvesco
Alvesco
49 claims
- Stiolto Respimat
Stiolto Respimat
48 claims
- Azithromycin 36
Azithromycin
36 claims
- Pirfenidone 30
Pirfenidone
30 claims
| Drug | Claims |
|---|---|
| Prednisone | 91 |
| Albuterol Sulfate Hfa Albuterol Sulfate | 75 |
| Spiriva Respimat Tiotropium Bromide | 60 |
| Wixela Inhub Fluticasone Propion/Salmeterol | 58 |
| Alvesco Ciclesonide | 49 |
| Stiolto Respimat Tiotropium Br/Olodaterol Hcl | 48 |
| Azithromycin | 36 |
| Pirfenidone | 30 |
| Furosemide | 24 |
| Symbicort Budesonide/Formoterol Fumarate | 23 |
* 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 CO →
All providers in Colorado →
Compare specialties →
Critical Care Medicine (Internal Medicine) Physician Overview
How Catherine Lazar, MD fits within the Critical Care Medicine (Internal Medicine) Physician landscape nationally.
6,646
Critical Care Medicine (Internal Medicine) Physician Providers in US
53
States with Critical Care Medicine (Internal Medicine) Physician
1,069
Avg Claims per Provider
Catherine Lazar, MD's 627 claims are below the specialty average of 1,069.
Nearby Critical Care Medicine (Internal Medicine) Physician Providers in Colorado
Other clinicians with the same primary specialty enrolled in Colorado, drawn from the same CMS NPPES roster as Lazar.
One of 147 Critical Care Medicine (Internal Medicine) Physician providers enrolled in Colorado, 5 are shown here.
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 Colorado medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Critical Care Medicine (Internal Medicine) 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 Catherine Lazar, MD's specialty? ▼
Catherine Lazar, MD specializes in Critical Care Medicine (Internal Medicine) Physician and practices in Lafayette, Colorado. Credentials: MD.
How much does Catherine Lazar, MD prescribe under Medicare Part D? ▼
In 2023, Catherine Lazar, MD wrote 627 Medicare Part D claims totaling $245K in drug costs for 166 beneficiaries.
Where is Catherine Lazar, MD located? ▼
Catherine Lazar, MD is located at 280 EXEMPLA CIR, Lafayette, CO, 80026. Phone: (303) 338-4545.
What is Catherine Lazar, MD's NPI number? ▼
Catherine Lazar, MD's National Provider Identifier (NPI) is 1992992440, issued on 09/28/2007.
Does Catherine Lazar, MD prescribe more brand-name or generic drugs? ▼
Catherine Lazar, MD's prescribing is 46% brand-name and 54% generic drugs by claim count, with $208K in brand drug costs.
How many Critical Care Medicine (Internal Medicine) Physician providers are there in the US? ▼
There are 6,646 Critical Care Medicine (Internal Medicine) Physician providers across 53 states in the US. The average Critical Care Medicine (Internal Medicine) Physician provider writes 1,069 Medicare Part D claims per year.
What drugs does Catherine Lazar, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Catherine Lazar, MD's most frequently prescribed drugs include Prednisone, Albuterol Sulfate Hfa, Spiriva Respimat. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Catherine Lazar, MD accept Medicare? ▼
Catherine Lazar, MD appears in CMS Medicare data with 627 Part D claims and 166 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Catherine Lazar, MD's credentials? ▼
Catherine Lazar, MD's NPI is 1992992440 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
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.