NPI registry status
Active
2026 NPPES data Medical Physician Assistant NPI 1548874688 PA-C
Verify on CMS → Heidi Hassler, PA-C
Medical Physician Assistant in Vermillion, South Dakota.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 40,694 in Medical Physician Assistant, 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
4K
Medicare Part D claims · 832 beneficiaries · Medical Physician Assistant avg: 1K
Industry payments
$510.91
29 payments · CMS Open Payments (Sunshine Act)
What the federal data shows
Heidi Hassler, PA-C filed 4,441 Medicare Part D claims in 2024 as a Medical Physician Assistant in Vermillion, South Dakota.
- 4K
- Part D claims, 2024
- $510.91
- industry payments (Sunshine Act)
- ≥92nd
- 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 Heidi Hassler, PA-C
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 1548874688), first enumerated 09/05/2020.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 4,441 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
Industry payment transparency
$510.91 in reported industry payments (29 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 Hassler with other Medical Physician Assistant providers
Same primary specialty, same federal CMS NPPES roster.
All 4 Medical Physician Assistant providers in Vermillion, SD →
Also enrolled in South Dakota
- Ashley Anziano, PA-C Rapid City, SD
- Andrew Arends, PA-C Beresford, SD
- Amber Authier, PA-C Yankton, SD
- James Awuah, PA-C, MPH Martin, SD
- Mariah Baier, PA-C Sioux Falls, SD
- Brooklyn Behrens, PA Martin, SD
Other specialties in Vermillion: Physical Therapist (19) · Speech-Language Pathologist (14) · Athletic Trainer (14) · Family Medicine Physician (14)
CMS NPPES provider registry desk
NPI 1548874688 · Medical Physician Assistant
NPI-10 · ENUM-RECENT · TAX-MID · RX-MID · BOOK-THIN · PHOTO-ENUM
- NPI-10 1548874688
- ENUM-RECENT 2020
- TAX-MID 41K Medical Physician
- RX-MID 4,441
- BOOK-THIN 108 in South Dakota
- PHOTO-ENUM Andrea Britten, PA-C · 2020
Heidi Hassler, PA-C's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
4,441 ≥ 92nd percentile 92% 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
What does the federal data show about Heidi Hassler, PA-C?
Quality data not reportedPrimary specialty
Medical Physician Assistant
Medicare Part D claims
4,441 290% vs specialty avg
Specialty distribution in South Dakota
How Medical Physician Assistant compares to other specialties among South Dakota 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 Medical Physician Assistant. 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 | 1548874688 |
|---|---|
| Specialty | Medical Physician Assistant |
| Credentials | PA-C |
| Gender | Female |
| NPI Issued | 09/05/2020 |
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 Heidi Hassler, PA-C. Source: openpaymentsdata.cms.gov.
Total received
$511
Largest payer
AstraZeneca Pharmaceuticals LP
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.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2024.
4,441
Total Claims
$191K
Total Drug Cost
832
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 6,120.1
- Total Day Supply
- 171,477
- Generic Drug Cost
- $44K
- Opioid Claims
- 13 (0.3% rate)
- Antibiotic Claims
- 243
Patient Demographics
- Average Patient Age
- 74.0 years
- Avg HCC Risk Score
- 2.22
- Gender Split
- 57% female / 43% male
- Age Distribution
- <65: 112, 65-74: 311, 75-84: 281, 85+: 128
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Heidi Hassler, PA-C prescribes most
Top Medicare Part D drugs by claim count, 2024
- Allopurinol
Allopurinol
631 claims
- Furosemide
Furosemide
465 claims
- Potassium Chloride
Potassium Chloride
371 claims
- Calcitriol
Calcitriol
324 claims
- Bumetanide
Bumetanide
278 claims
- Spironolactone 194
Spironolactone
194 claims
- Hydralazine Hcl 193
Hydralazine Hcl
193 claims
- Amlodipine Besylate 137
Amlodipine Besylate
137 claims
| Drug | Claims |
|---|---|
| Allopurinol | 631 |
| Furosemide | 465 |
| Potassium Chloride | 371 |
| Calcitriol | 324 |
| Bumetanide | 278 |
| Spironolactone | 194 |
| Hydralazine Hcl | 193 |
| Amlodipine Besylate | 137 |
| Lisinopril | 134 |
| Losartan Potassium | 111 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Medical Physician Assistant Overview
How Heidi Hassler, PA-C fits within the Medical Physician Assistant landscape nationally.
40,694
Medical Physician Assistant Providers in US
55
States with Medical Physician Assistant
1,139
Avg Claims per Provider
Heidi Hassler, PA-C's 4,441 claims are above the specialty average of 1,139.
Nationwide Medical Physician Assistant peers with similar MIPS or enrollment year
Two federal-record peer sets for Hassler, both outside South Dakota so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2020)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Medical Physician Assistant Providers in South Dakota
Other clinicians with the same primary specialty enrolled in South Dakota, drawn from the same CMS NPPES roster as Hassler.
One of 108 Medical Physician Assistant providers enrolled in South Dakota, 11 are shown on this page.
Valerie Belding
PA-C
Sioux Falls, SD
Deane Berg
P.A.-C
Sioux Falls, SD
Pauline Bevers
PA-C
Miller, SD
Jennifer Bietz
PA-C
Armour, SD
Stephanie Bonner
Sioux Falls, SD
Compare Medical Physician Assistant nationally: see state-by-state distribution →
Frequently Asked Questions
What is Heidi Hassler, PA-C's specialty? ▼
Heidi Hassler, PA-C specializes in Medical Physician Assistant and practices in Vermillion, South Dakota. Credentials: PA-C.
How much does Heidi Hassler, PA-C prescribe under Medicare Part D? ▼
In 2024, Heidi Hassler, PA-C wrote 4,441 Medicare Part D claims totaling $191K in drug costs for 832 beneficiaries.
Where is Heidi Hassler, PA-C located? ▼
Heidi Hassler, PA-C is located at 20 S PLUM ST, Vermillion, SD, 57069. Phone: (605) 677-3500.
What is Heidi Hassler, PA-C's NPI number? ▼
Heidi Hassler, PA-C's National Provider Identifier (NPI) is 1548874688, issued on 09/05/2020.
Does Heidi Hassler, PA-C prescribe opioids? ▼
Yes, Heidi Hassler, PA-C had 13 opioid claims in 2024 with an opioid prescribing rate of 0.3%.
How many Medical Physician Assistant providers are there in the US? ▼
There are 40,694 Medical Physician Assistant providers across 55 states in the US. The average Medical Physician Assistant provider writes 1,139 Medicare Part D claims per year.
What drugs does Heidi Hassler, PA-C prescribe most often? ▼
Based on 2024 Medicare Part D data, Heidi Hassler, PA-C's most frequently prescribed drugs include Allopurinol, Furosemide, Potassium Chloride. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Heidi Hassler, PA-C accept Medicare? ▼
Heidi Hassler, PA-C appears in CMS Medicare data with 4,441 Part D claims and 832 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Heidi Hassler, PA-C's credentials? ▼
Heidi Hassler, PA-C's NPI is 1548874688 with credentials PA-C. 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.