NPI registry status
Active
2026 NPPES data Physician Assistant NPI 1639402134 PA-C
Verify on CMS → Heather Lewis, PA-C
Physician Assistant in Cascade, Idaho.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 150,974 in 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
479
Medicare Part D claims · 102 beneficiaries · Physician Assistant avg: 790
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Heather Lewis, PA-C filed 479 Medicare Part D claims in 2023 as a Physician Assistant in Cascade, Idaho.
- 479
- Part D claims, 2023
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.
Heather Lewis, PA-C's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
479 Top 38% higher than 62% 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
What does the federal data show about Heather Lewis, PA-C?
Quality data not reportedPrimary specialty
Physician Assistant
Medicare Part D claims
479 39% vs specialty avg
Specialty distribution in Idaho
How Physician Assistant compares to other specialties among Idaho 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 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).
Heather Lewis, PA-C appears in the CMS NPPES registry as a Physician Assistant provider holding PA-C credentials at 402 LAKE CASCADE PKWY, Cascade, ID, 83611, with a listed phone of (208) 382-4285. NPI 1639402134 was issued on 09/15/2009.
Medicare Part D records for calendar year 2023 show 479 prescription claims written by this provider, covering 102 Medicare beneficiaries and totaling roughly $51K in drug spend.
Physician Assistant is a high-volume specialty nationwide, with 150,974 enrolled providers across 56 states and an average of 790 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 | 1639402134 |
|---|---|
| Specialty | Physician Assistant |
| Credentials | PA-C |
| Gender | Female |
| NPI Issued | 09/15/2009 |
Hospital and facility affiliations
Facilities where Heather Lewis, PA-C 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.
Cascade Medical Center Hospital District
Cascade, ID
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
479
Total Claims
$51K
Total Drug Cost
102
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,064
- Total Day Supply
- 30,654
- Generic Drug Cost
- $5K
- Antibiotic Claims
- 14
Patient Demographics
- Average Patient Age
- 71.3 years
- Avg HCC Risk Score
- 0.86
- Gender Split
- 65% female / 35% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Heather Lewis, PA-C prescribes most
Top Medicare Part D drugs by claim count, 2023
- Levothyroxine Sodium
Levothyroxine Sodium
39 claims
- Losartan Potassium
Losartan Potassium
28 claims
- Alendronate Sodium
Alendronate Sodium
24 claims
- Atorvastatin Calcium
Atorvastatin Calcium
19 claims
- Hydrochlorothiazide
Hydrochlorothiazide
18 claims
- Lisinopril
Lisinopril
16 claims
- Omeprazole
Omeprazole
16 claims
- Citalopram Hbr 14
Citalopram Hbr
14 claims
| Drug | Claims |
|---|---|
| Levothyroxine Sodium | 39 |
| Losartan Potassium | 28 |
| Alendronate Sodium | 24 |
| Atorvastatin Calcium | 19 |
| Hydrochlorothiazide | 18 |
| Lisinopril | 16 |
| Omeprazole | 16 |
| Citalopram Hbr Citalopram Hydrobromide | 14 |
| Ozempic Semaglutide | 12 |
| Sertraline Hcl | 11 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Physician Assistant Overview
How Heather Lewis, PA-C fits within the Physician Assistant landscape nationally.
150,974
Physician Assistant Providers in US
56
States with Physician Assistant
790
Avg Claims per Provider
Heather Lewis, PA-C's 479 claims are below the specialty average of 790.
Nearby Physician Assistant Providers in Idaho
Other clinicians with the same primary specialty enrolled in Idaho, drawn from the same CMS NPPES roster as Lewis.
Dr. Hodaka Abe
PA
Caldwell, ID
Patrick Abel
Twin Falls, ID
Dr. Mark Ackerman
PAC
Orofino, ID
Dr. Alan Adams
PA-C
Idaho Falls, ID
Dr. Jessica Adams
PA-C
Coeur D Alene, ID
Compare Physician Assistant 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 Idaho medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Physician Assistant 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.
Healthcare Guides
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How to Find a Doctor
Step-by-step guide to choosing a provider
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Medical Specialties Explained
Who treats what and how specialties differ
Understanding Medicare Claims Data
What prescribing data reveals about a provider
In-Network vs Out-of-Network
How insurance networks affect your costs
Telehealth Guide
Virtual care options and coverage in 2026
Explore Idaho
Frequently Asked Questions
What is Heather Lewis, PA-C's specialty? ▼
Heather Lewis, PA-C specializes in Physician Assistant and practices in Cascade, Idaho. Credentials: PA-C.
How much does Heather Lewis, PA-C prescribe under Medicare Part D? ▼
In 2023, Heather Lewis, PA-C wrote 479 Medicare Part D claims totaling $51K in drug costs for 102 beneficiaries.
Where is Heather Lewis, PA-C located? ▼
Heather Lewis, PA-C is located at 402 LAKE CASCADE PKWY, Cascade, ID, 83611. Phone: (208) 382-4285.
What is Heather Lewis, PA-C's NPI number? ▼
Heather Lewis, PA-C's National Provider Identifier (NPI) is 1639402134, issued on 09/15/2009.
How many Physician Assistant providers are there in the US? ▼
There are 150,974 Physician Assistant providers across 56 states in the US. The average Physician Assistant provider writes 790 Medicare Part D claims per year.
What drugs does Heather Lewis, PA-C prescribe most often? ▼
Based on 2023 Medicare Part D data, Heather Lewis, PA-C's most frequently prescribed drugs include Levothyroxine Sodium, Losartan Potassium, Alendronate Sodium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Heather Lewis, PA-C accept Medicare? ▼
Heather Lewis, PA-C appears in CMS Medicare data with 479 Part D claims and 102 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Heather Lewis, PA-C's credentials? ▼
Heather Lewis, PA-C's NPI is 1639402134 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 (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.