NPI registry status
Active
2026 NPPES data Endocrinology, Diabetes & Metabolism Physician NPI 1518092972 MD
Verify on CMS → Michelle Cassara, MD
Endocrinology, Diabetes & Metabolism Physician in Arvada, 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 7,871 in Endocrinology, Diabetes & Metabolism 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
3K
Medicare Part D claims · 420 beneficiaries · Endocrinology, Diabetes & Metabolism Physician avg: 3K
Generic prescribing
35%
generic claims · 55% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$11.7K
44 payments · CMS Open Payments (Sunshine Act)
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
Michelle Cassara, MD filed 3,038 Medicare Part D claims in 2023 as a Endocrinology, Diabetes & Metabolism Physician in Arvada, Colorado, prescribing 35% generic.
- 3K
- Part D claims, 2023
- 35%
- 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.
Michelle Cassara, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
3,038 Top 11% higher than 89% 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)
Michelle Cassara, 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 Michelle Cassara, MD?
Quality data not reportedPrimary specialty
Endocrinology, Diabetes & Metabolism Physician
Medicare Part D claims
3,038 15% vs specialty avg
Specialty distribution in Colorado
How Endocrinology, Diabetes & Metabolism 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 Endocrinology, Diabetes & Metabolism 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).
Michelle Cassara, MD appears in the CMS NPPES registry as an Endocrinology, Diabetes & Metabolism Physician provider holding MD credentials at 15389 W 91ST DR STE 200, Arvada, CO, 80007, with a listed phone of (303) 403-7933. NPI 1518092972 was issued on 02/23/2007.
Medicare Part D records for calendar year 2023 show 3,038 prescription claims written by this provider, covering 420 Medicare beneficiaries and totaling roughly $1.9 million in drug spend, split 55% brand-name and 35% generic by claim count.
Endocrinology, Diabetes & Metabolism Physician is a mid-sized specialty nationwide, with 7,871 enrolled providers across 54 states and an average of 2,639 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 | 1518092972 |
|---|---|
| Specialty | Endocrinology, Diabetes & Metabolism Physician |
| Credentials | MD |
| Gender | Female |
| NPI Issued | 02/23/2007 |
Hospital and facility affiliations
Facilities where Michelle Cassara, 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.
Intermountain Medical Group Denver LLC
Broomfield, CO
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 Michelle Cassara, MD. Source: openpaymentsdata.cms.gov.
Total received
$11.7K
Largest payer
Novo Nordisk 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
Michelle Cassara, MD - brand share 55.0%
Endocrinology, Diabetes & Metabolism Physician average
55% brand-name claims vs 35% generic, on 3,038 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.
3,038
Total Claims
$1.9M
Total Drug Cost
420
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 7,551
- Total Day Supply
- 224,840
- Brand vs Generic
- 55% brand / 35% generic
- Brand Drug Cost
- $1.8M
- Generic Drug Cost
- $38K
Patient Demographics
- Average Patient Age
- 71.7 years
- Avg HCC Risk Score
- 1.58
- Gender Split
- 73% female / 27% male
- Age Distribution
- <65: 42, 65-74: 221, 75-84: 143, 85+: 14
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Michelle Cassara, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Levothyroxine Sodium
Levothyroxine Sodium
485 claims
- Metformin Hcl 190
Metformin Hcl
190 claims
- Synthroid 157
Synthroid
157 claims
- Liothyronine Sodium 113
Liothyronine Sodium
113 claims
- Trulicity 107
Trulicity
107 claims
- Ozempic 96
Ozempic
96 claims
- Humalog 75
Humalog
75 claims
- Jardiance 70
Jardiance
70 claims
| Drug | Claims |
|---|---|
| Levothyroxine Sodium | 485 |
| Metformin Hcl | 190 |
| Synthroid Levothyroxine Sodium | 157 |
| Liothyronine Sodium | 113 |
| Trulicity Dulaglutide | 107 |
| Ozempic Semaglutide | 96 |
| Humalog Insulin Lispro | 75 |
| Jardiance Empagliflozin | 70 |
| Humalog Kwikpen U-100 Insulin Lispro | 66 |
| Novolog Flexpen Insulin Aspart | 50 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Endocrinology, Diabetes & Metabolism Physician in CO →
All providers in Colorado →
Compare specialties →
Endocrinology, Diabetes & Metabolism Physician Overview
How Michelle Cassara, MD fits within the Endocrinology, Diabetes & Metabolism Physician landscape nationally.
7,871
Endocrinology, Diabetes & Metabolism Physician Providers in US
54
States with Endocrinology, Diabetes & Metabolism Physician
2,639
Avg Claims per Provider
Michelle Cassara, MD's 3,038 claims are above the specialty average of 2,639.
Nearby Endocrinology, Diabetes & Metabolism Physician Providers in Colorado
Other clinicians with the same primary specialty enrolled in Colorado, drawn from the same CMS NPPES roster as Cassara.
Dr. Rebecca Adochio
MD
Edwards, CO
Dr. Robert Alsever
M.D.
Pueblo, CO
Dr. Linda Barbour
MD
Aurora, CO
Dr. Caitlin Bell
MD
Arvada, CO
Dr. Jennifer Bernard
M.D.
Lakewood, CO
Compare Endocrinology, Diabetes & Metabolism 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 Colorado medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Endocrinology, Diabetes & Metabolism 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 Michelle Cassara, MD's specialty? ▼
Michelle Cassara, MD specializes in Endocrinology, Diabetes & Metabolism Physician and practices in Arvada, Colorado. Credentials: MD.
How much does Michelle Cassara, MD prescribe under Medicare Part D? ▼
In 2023, Michelle Cassara, MD wrote 3,038 Medicare Part D claims totaling $1.9M in drug costs for 420 beneficiaries.
Where is Michelle Cassara, MD located? ▼
Michelle Cassara, MD is located at 15389 W 91ST DR STE 200, Arvada, CO, 80007. Phone: (303) 403-7933.
What is Michelle Cassara, MD's NPI number? ▼
Michelle Cassara, MD's National Provider Identifier (NPI) is 1518092972, issued on 02/23/2007.
Does Michelle Cassara, MD prescribe more brand-name or generic drugs? ▼
Michelle Cassara, MD's prescribing is 55% brand-name and 35% generic drugs by claim count, with $1.8M in brand drug costs.
How many Endocrinology, Diabetes & Metabolism Physician providers are there in the US? ▼
There are 7,871 Endocrinology, Diabetes & Metabolism Physician providers across 54 states in the US. The average Endocrinology, Diabetes & Metabolism Physician provider writes 2,639 Medicare Part D claims per year.
What drugs does Michelle Cassara, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Michelle Cassara, MD's most frequently prescribed drugs include Levothyroxine Sodium, Metformin Hcl, Synthroid. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Michelle Cassara, MD accept Medicare? ▼
Michelle Cassara, MD appears in CMS Medicare data with 3,038 Part D claims and 420 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Michelle Cassara, MD's credentials? ▼
Michelle Cassara, MD's NPI is 1518092972 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.