NPI registry status
Active
2026 NPPES data Psychiatric/Mental Health Clinical Nurse Specialist NPI 1639279177 CNS, BC
Verify on CMS → Gerald Lewis, CNS, BC
Psychiatric/Mental Health Clinical Nurse Specialist in Merrillville, Indiana.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 978 in Psychiatric/Mental Health Clinical Nurse Specialist, 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
9K
Medicare Part D claims · 491 beneficiaries · Psychiatric/Mental Health Clinical Nurse Specialist avg: 1K
Generic prescribing
91%
generic claims · 9% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$84.3K
306 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
Gerald Lewis, CNS, BC filed 8,962 Medicare Part D claims in 2023 as a Psychiatric/Mental Health Clinical Nurse Specialist in Merrillville, Indiana, prescribing 91% generic.
- 9K
- Part D claims, 2023
- 91%
- generic prescribing
- $84.3K
- industry payments (Sunshine Act)
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.
Gerald Lewis, CNS, BC's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
8,962 Top 2% higher than 98% 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 Gerald Lewis, CNS, BC?
Quality data not reportedPrimary specialty
Psychiatric/Mental Health Clinical Nurse Specialist
Medicare Part D claims
8,962 9× vs specialty avg
Specialty distribution in Indiana
How Psychiatric/Mental Health Clinical Nurse Specialist compares to other specialties among Indiana 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 Psychiatric/Mental Health Clinical Nurse Specialist. 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).
Gerald Lewis, CNS, BC appears in the CMS NPPES registry as a Psychiatric/Mental Health Clinical Nurse Specialist provider holding CNS, BC credentials at 9120 CONNECTICUT ST STE A, Merrillville, IN, 46410, with a listed phone of (219) 793-1233. NPI 1639279177 was issued on 09/24/2006.
Medicare Part D records for calendar year 2023 show 8,962 prescription claims written by this provider, covering 491 Medicare beneficiaries and totaling roughly $1.5 million in drug spend, split 9% brand-name and 91% generic by claim count, with an opioid prescribing rate of 0.3%.
Psychiatric/Mental Health Clinical Nurse Specialist is a narrow specialty nationwide, with 978 enrolled providers across 50 states and an average of 1,050 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 | 1639279177 |
|---|---|
| Specialty | Psychiatric/Mental Health Clinical Nurse Specialist |
| Credentials | CNS, BC |
| Gender | Male |
| NPI Issued | 09/24/2006 |
Hospital and facility affiliations
Facilities where Gerald Lewis, CNS, BC 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.
Michael Frampton M.D., P.C.
Merrillville, IN
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 Gerald Lewis, CNS, BC. Source: openpaymentsdata.cms.gov.
Total received
$84.3K
Largest payer
Neurocrine Biosciences, 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 · Generic-heavy
Gerald Lewis, CNS, BC - brand share 9.0%
Psychiatric/Mental Health Clinical Nurse Specialist average
9% brand-name claims vs 91% generic, on 8,962 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.
8,962
Total Claims
$1.5M
Total Drug Cost
491
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 13,107
- Total Day Supply
- 387,689
- Brand vs Generic
- 9% brand / 91% generic
- Brand Drug Cost
- $1.1M
- Generic Drug Cost
- $342K
- Opioid Claims
- 27 (0.3% rate)
Patient Demographics
- Average Patient Age
- 63.9 years
- Avg HCC Risk Score
- 1.37
- Gender Split
- 57% female / 43% male
- Age Distribution
- <65: 184, 65-74: 224, 75-84: 70, 85+: 13
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Gerald Lewis, CNS, BC prescribes most
Top Medicare Part D drugs by claim count, 2023
- Alprazolam
Alprazolam
622 claims
- Clonazepam
Clonazepam
463 claims
- Trazodone Hcl
Trazodone Hcl
447 claims
- Mirtazapine
Mirtazapine
357 claims
- Duloxetine Hcl
Duloxetine Hcl
345 claims
- Fluoxetine Hcl
Fluoxetine Hcl
334 claims
- Quetiapine Fumarate
Quetiapine Fumarate
267 claims
- Lamotrigine
Lamotrigine
264 claims
| Drug | Claims |
|---|---|
| Alprazolam | 622 |
| Clonazepam | 463 |
| Trazodone Hcl | 447 |
| Mirtazapine | 357 |
| Duloxetine Hcl | 345 |
| Fluoxetine Hcl | 334 |
| Quetiapine Fumarate | 267 |
| Lamotrigine | 264 |
| Bupropion Xl Bupropion Hcl | 257 |
| Aripiprazole | 250 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Psychiatric/Mental Health Clinical Nurse Specialist in IN →
All providers in Indiana →
Compare specialties →
Psychiatric/Mental Health Clinical Nurse Specialist Overview
How Gerald Lewis, CNS, BC fits within the Psychiatric/Mental Health Clinical Nurse Specialist landscape nationally.
978
Psychiatric/Mental Health Clinical Nurse Specialist Providers in US
50
States with Psychiatric/Mental Health Clinical Nurse Specialist
1,050
Avg Claims per Provider
Gerald Lewis, CNS, BC's 8,962 claims are above the specialty average of 1,050.
Nearby Psychiatric/Mental Health Clinical Nurse Specialist Providers in Indiana
Other clinicians with the same primary specialty enrolled in Indiana, drawn from the same CMS NPPES roster as Lewis.
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 Indiana medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Psychiatric/Mental Health Clinical Nurse Specialist 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 Gerald Lewis, CNS, BC's specialty? ▼
Gerald Lewis, CNS, BC specializes in Psychiatric/Mental Health Clinical Nurse Specialist and practices in Merrillville, Indiana. Credentials: CNS, BC.
How much does Gerald Lewis, CNS, BC prescribe under Medicare Part D? ▼
In 2023, Gerald Lewis, CNS, BC wrote 8,962 Medicare Part D claims totaling $1.5M in drug costs for 491 beneficiaries.
Where is Gerald Lewis, CNS, BC located? ▼
Gerald Lewis, CNS, BC is located at 9120 CONNECTICUT ST STE A, Merrillville, IN, 46410. Phone: (219) 793-1233.
What is Gerald Lewis, CNS, BC's NPI number? ▼
Gerald Lewis, CNS, BC's National Provider Identifier (NPI) is 1639279177, issued on 09/24/2006.
Does Gerald Lewis, CNS, BC prescribe more brand-name or generic drugs? ▼
Gerald Lewis, CNS, BC's prescribing is 9% brand-name and 91% generic drugs by claim count, with $1.1M in brand drug costs.
Does Gerald Lewis, CNS, BC prescribe opioids? ▼
Yes, Gerald Lewis, CNS, BC had 27 opioid claims in 2023 with an opioid prescribing rate of 0.3%.
How many Psychiatric/Mental Health Clinical Nurse Specialist providers are there in the US? ▼
There are 978 Psychiatric/Mental Health Clinical Nurse Specialist providers across 50 states in the US. The average Psychiatric/Mental Health Clinical Nurse Specialist provider writes 1,050 Medicare Part D claims per year.
What drugs does Gerald Lewis, CNS, BC prescribe most often? ▼
Based on 2023 Medicare Part D data, Gerald Lewis, CNS, BC's most frequently prescribed drugs include Alprazolam, Clonazepam, Trazodone Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Gerald Lewis, CNS, BC accept Medicare? ▼
Gerald Lewis, CNS, BC appears in CMS Medicare data with 8,962 Part D claims and 491 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Gerald Lewis, CNS, BC's credentials? ▼
Gerald Lewis, CNS, BC's NPI is 1639279177 with credentials CNS, BC. 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.