NPI registry status
Active
2026 NPPES data Clinical Nurse Specialist NPI 1669439337 PMHCNS-BC
Verify on CMS → Louisa Martin, PMHCNS-BC
Clinical Nurse Specialist in Waltham, Massachusetts.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 1,715 in 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
338
Medicare Part D claims · 35 beneficiaries · Clinical Nurse Specialist avg: 953
Generic prescribing
96%
generic claims · 4% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$13.53
1 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
Louisa Martin, PMHCNS-BC filed 338 Medicare Part D claims in 2023 as a Clinical Nurse Specialist in Waltham, Massachusetts, prescribing 96% generic.
- 338
- Part D claims, 2023
- 96%
- generic prescribing
- $13.53
- 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.
Louisa Martin, PMHCNS-BC's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
338 Top 43% higher than 57% 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 Louisa Martin, PMHCNS-BC?
Quality data not reportedPrimary specialty
Clinical Nurse Specialist
Medicare Part D claims
338 65% vs specialty avg
Specialty distribution in Massachusetts
How Clinical Nurse Specialist compares to other specialties among Massachusetts 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 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).
Louisa Martin, PMHCNS-BC appears in the CMS NPPES registry as a Clinical Nurse Specialist provider holding PMHCNS-BC credentials at 210 BEAR HILL RD, Waltham, MA, 02451, with a listed phone of (781) 966-0070. NPI 1669439337 was issued on 04/27/2006.
Medicare Part D records for calendar year 2023 show 338 prescription claims written by this provider, covering 35 Medicare beneficiaries and totaling roughly $23K in drug spend, split 4% brand-name and 96% generic by claim count.
Clinical Nurse Specialist is a narrow specialty nationwide, with 1,715 enrolled providers across 49 states and an average of 953 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 | 1669439337 |
|---|---|
| Specialty | Clinical Nurse Specialist |
| Credentials | PMHCNS-BC |
| Gender | Female |
| NPI Issued | 04/27/2006 |
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 Louisa Martin, PMHCNS-BC. Source: openpaymentsdata.cms.gov.
Total received
$14
Largest payer
ABBVIE 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.
License & disciplinary context - Massachusetts BORIM 2023 annual report
Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~38K Massachusetts medical licensees in 2023 - they are NOT specific to Louisa Martin, PMHCNS-BC. To verify Louisa Martin, PMHCNS-BC's current license status, search the BORIM public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
80
Total board actions, Massachusetts 2023
Across 78 cases
2.11
Actions per 1,000 licensees
Massachusetts statewide rate
probation
Most common action type
29 cases
BORIM publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the Massachusetts disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Generic-heavy
Louisa Martin, PMHCNS-BC - brand share 4.0%
Clinical Nurse Specialist average
4% brand-name claims vs 96% generic, on 338 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.
338
Total Claims
$23K
Total Drug Cost
35
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 609
- Total Day Supply
- 18,217
- Brand vs Generic
- 4% brand / 96% generic
- Brand Drug Cost
- $8K
- Generic Drug Cost
- $15K
Patient Demographics
- Average Patient Age
- 67.4 years
- Avg HCC Risk Score
- 1.05
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Louisa Martin, PMHCNS-BC prescribes most
Top Medicare Part D drugs by claim count, 2023
- Lorazepam
Lorazepam
29 claims
- Quetiapine Fumarate
Quetiapine Fumarate
29 claims
- Lamotrigine
Lamotrigine
25 claims
- Desvenlafaxine Suc…
Desvenlafaxine Succinate Er
23 claims
- Trazodone Hcl
Trazodone Hcl
23 claims
- Fluoxetine Hcl
Fluoxetine Hcl
22 claims
- Clonazepam
Clonazepam
15 claims
- Duloxetine Hcl
Duloxetine Hcl
15 claims
| Drug | Claims |
|---|---|
| Lorazepam | 29 |
| Quetiapine Fumarate | 29 |
| Lamotrigine | 25 |
| Desvenlafaxine Succinate Er Desvenlafaxine Succinate | 23 |
| Trazodone Hcl | 23 |
| Fluoxetine Hcl | 22 |
| Clonazepam | 15 |
| Duloxetine Hcl | 15 |
| Alprazolam | 12 |
| Sertraline Hcl | 12 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Clinical Nurse Specialist Overview
How Louisa Martin, PMHCNS-BC fits within the Clinical Nurse Specialist landscape nationally.
1,715
Clinical Nurse Specialist Providers in US
49
States with Clinical Nurse Specialist
953
Avg Claims per Provider
Louisa Martin, PMHCNS-BC's 338 claims are below the specialty average of 953.
Nearby Clinical Nurse Specialist Providers in Massachusetts
Other clinicians with the same primary specialty enrolled in Massachusetts, drawn from the same CMS NPPES roster as Martin.
Dr. Kathleen Abruzese
R.N.
Weymouth, MA
Dr. Katherine Blake
APRN BC
Newbury Port, MA
Dr. Julia Burnham
RN.BC,MS
Bedford, MA
Dr. Adam Caughhorn
MSN, RN, AG-CNS
Boston, MA
Dr. Deborah Chaulk
R.N.
Worcester, MA
Compare Clinical Nurse Specialist 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 Massachusetts medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby 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.
Healthcare Guides
Learn more about finding, verifying, and understanding healthcare providers.
How to Find a Doctor
Step-by-step guide to choosing a provider
Verify Credentials
Check NPI, board certification & license status
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 Massachusetts
Frequently Asked Questions
What is Louisa Martin, PMHCNS-BC's specialty? ▼
Louisa Martin, PMHCNS-BC specializes in Clinical Nurse Specialist and practices in Waltham, Massachusetts. Credentials: PMHCNS-BC.
How much does Louisa Martin, PMHCNS-BC prescribe under Medicare Part D? ▼
In 2023, Louisa Martin, PMHCNS-BC wrote 338 Medicare Part D claims totaling $23K in drug costs for 35 beneficiaries.
Where is Louisa Martin, PMHCNS-BC located? ▼
Louisa Martin, PMHCNS-BC is located at 210 BEAR HILL RD, Waltham, MA, 02451. Phone: (781) 966-0070.
What is Louisa Martin, PMHCNS-BC's NPI number? ▼
Louisa Martin, PMHCNS-BC's National Provider Identifier (NPI) is 1669439337, issued on 04/27/2006.
Does Louisa Martin, PMHCNS-BC prescribe more brand-name or generic drugs? ▼
Louisa Martin, PMHCNS-BC's prescribing is 4% brand-name and 96% generic drugs by claim count, with $8K in brand drug costs.
How many Clinical Nurse Specialist providers are there in the US? ▼
There are 1,715 Clinical Nurse Specialist providers across 49 states in the US. The average Clinical Nurse Specialist provider writes 953 Medicare Part D claims per year.
What drugs does Louisa Martin, PMHCNS-BC prescribe most often? ▼
Based on 2023 Medicare Part D data, Louisa Martin, PMHCNS-BC's most frequently prescribed drugs include Lorazepam, Quetiapine Fumarate, Lamotrigine. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Louisa Martin, PMHCNS-BC accept Medicare? ▼
Louisa Martin, PMHCNS-BC appears in CMS Medicare data with 338 Part D claims and 35 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Louisa Martin, PMHCNS-BC's credentials? ▼
Louisa Martin, PMHCNS-BC's NPI is 1669439337 with credentials PMHCNS-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.