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 8,078 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 · 453 beneficiaries · Endocrinology, Diabetes & Metabolism Physician avg: 3K
Generic prescribing
35%
generic claims · 56% 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, 2024
What the federal data shows
Michelle Cassara, MD filed 3,322 Medicare Part D claims in 2024 as an Endocrinology, Diabetes & Metabolism Physician in Arvada, Colorado, prescribing 35% generic.
- 3K
- Part D claims, 2024
- 35%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥89th
- 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 Michelle Cassara, MD
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 1518092972), first enumerated 02/23/2007.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 3,322 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
$11.7K in reported industry payments (44 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.
Compare Cassara with other Endocrinology, Diabetes & Metabolism Physician providers
Same primary specialty, same federal CMS NPPES roster.
Also enrolled in Colorado
- 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
- Dr. Daniel Bessesen, MD Denver, CO
Other specialties in Arvada: Pharmacist (107) · Massage Therapist (102) · Mental Health Counselor (97) · Physical Therapist (89)
CMS NPPES provider registry desk
NPI 1518092972 · Endocrinology, Diabetes & Metabolism Physician
NPI-10 · ENUM-MID · TAX-MID · RX-MID · BOOK-THIN · PHOTO-ENUM
- NPI-10 1518092972
- ENUM-MID 2007
- TAX-MID 8K Endocrinology, Diabetes
- RX-MID 3,322
- BOOK-THIN 119 in Colorado
- PHOTO-ENUM Geliann Kitsigianis,… · 2007
Michelle Cassara, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
3,322 ≥ 89th percentile 89% 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)
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
3,322 21% 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).
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 56.0%
Endocrinology, Diabetes & Metabolism Physician average
56% brand-name claims vs 35% generic, on 3,322 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.
3,322
Total Claims
$1.4M
Total Drug Cost
453
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 8,031.9
- Total Day Supply
- 238,751
- Brand vs Generic
- 56% brand / 35% generic
- Brand Drug Cost
- $1.3M
- Generic Drug Cost
- $27K
Patient Demographics
- Average Patient Age
- 72.1 years
- Avg HCC Risk Score
- 1.70
- Gender Split
- 73% female / 27% male
- Age Distribution
- <65: 46, 65-74: 230, 75-84: 158, 85+: 19
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Michelle Cassara, MD prescribes most
Top Medicare Part D drugs by claim count, 2024
- Levothyroxine Sodium
Levothyroxine Sodium
514 claims
- Synthroid
Synthroid
213 claims
- Metformin Hcl 159
Metformin Hcl
159 claims
- Ozempic 155
Ozempic
155 claims
- Mounjaro 153
Mounjaro
153 claims
- Liothyronine Sodium 139
Liothyronine Sodium
139 claims
- Lantus Solostar 109
Lantus Solostar
109 claims
- Ultra-Fine Mini Pe… 86
Ultra-Fine Mini Pen Needle
86 claims
| Drug | Claims |
|---|---|
| Levothyroxine Sodium | 514 |
| Synthroid Levothyroxine Sodium | 213 |
| Metformin Hcl | 159 |
| Ozempic Semaglutide | 155 |
| Mounjaro Tirzepatide | 153 |
| Liothyronine Sodium | 139 |
| Lantus Solostar Insulin Glargine,hum.Rec.Anlog | 109 |
| Ultra-Fine Mini Pen Needle Pen Needle, Diabetic | 86 |
| Trulicity Dulaglutide | 79 |
| Jardiance Empagliflozin | 73 |
* 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.
8,078
Endocrinology, Diabetes & Metabolism Physician Providers in US
54
States with Endocrinology, Diabetes & Metabolism Physician
2,739
Avg Claims per Provider
Michelle Cassara, MD's 3,322 claims are above the specialty average of 2,739.
Nationwide Endocrinology, Diabetes & Metabolism Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Cassara, both outside Colorado so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2007)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
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.
One of 119 Endocrinology, Diabetes & Metabolism Physician providers enrolled in Colorado, 11 are shown on this page.
Dr. Lori Book
MD
Colorado Springs, CO
Dr. Christina Bratcher
MD
Colorado Springs, CO
Dr. Heather Brooks
MD
Aurora, CO
Dr. Linda Buckley
MD
Englewood, CO
Dr. Warren Capell
MD
Aurora, CO
Compare Endocrinology, Diabetes & Metabolism Physician nationally: see state-by-state distribution →
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 2024, Michelle Cassara, MD wrote 3,322 Medicare Part D claims totaling $1.4M in drug costs for 453 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 56% brand-name and 35% generic drugs by claim count, with $1.3M in brand drug costs.
How many Endocrinology, Diabetes & Metabolism Physician providers are there in the US? ▼
There are 8,078 Endocrinology, Diabetes & Metabolism Physician providers across 54 states in the US. The average Endocrinology, Diabetes & Metabolism Physician provider writes 2,739 Medicare Part D claims per year.
What drugs does Michelle Cassara, MD prescribe most often? ▼
Based on 2024 Medicare Part D data, Michelle Cassara, MD's most frequently prescribed drugs include Levothyroxine Sodium, Synthroid, Metformin Hcl. 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 3,322 Part D claims and 453 Medicare beneficiaries in 2024. 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 (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.