NPI registry status
Active
2026 NPPES data Gerontology Nurse Practitioner NPI 1093000648 APRN GNP-BC
Verify on CMS → Kathleen Guilmain, APRN GNP-BC
Gerontology Nurse Practitioner in North Haverhill, New Hampshire.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 9,706 in Gerontology Nurse Practitioner, 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 · 73 beneficiaries · Gerontology Nurse Practitioner avg: 1K
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Kathleen Guilmain, APRN GNP-BC filed 3,033 Medicare Part D claims in 2023 as a Gerontology Nurse Practitioner in North Haverhill, New Hampshire.
- 3K
- 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.
Kathleen Guilmain, APRN GNP-BC's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
3,033 Top 11% higher than 89% 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 Kathleen Guilmain, APRN GNP-BC?
Quality data not reportedPrimary specialty
Gerontology Nurse Practitioner
Medicare Part D claims
3,033 136% vs specialty avg
Specialty distribution in New Hampshire
How Gerontology Nurse Practitioner compares to other specialties among New Hampshire 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 Gerontology Nurse Practitioner. 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).
Kathleen Guilmain, APRN GNP-BC appears in the CMS NPPES registry as a Gerontology Nurse Practitioner provider holding APRN GNP-BC credentials at 299 COUNTRY LAND DR, North Haverhill, NH, 03774, with a listed phone of (603) 747-4161. NPI 1093000648 was issued on 06/12/2011.
Medicare Part D records for calendar year 2023 show 3,033 prescription claims written by this provider, covering 73 Medicare beneficiaries and totaling roughly $283K in drug spend, with an opioid prescribing rate of 8.7%.
Gerontology Nurse Practitioner is a mid-sized specialty nationwide, with 9,706 enrolled providers across 54 states and an average of 1,283 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 | 1093000648 |
|---|---|
| Specialty | Gerontology Nurse Practitioner |
| Credentials | APRN GNP-BC |
| Gender | Female |
| NPI Issued | 06/12/2011 |
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
3,033
Total Claims
$283K
Total Drug Cost
73
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 3,033
- Total Day Supply
- 65,003
- Generic Drug Cost
- $77K
- Opioid Claims
- 264 (8.7% rate)
- Antibiotic Claims
- 103
Patient Demographics
- Average Patient Age
- 77.9 years
- Avg HCC Risk Score
- 2.16
- Gender Split
- 74% female / 26% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Kathleen Guilmain, APRN GNP-BC prescribes most
Top Medicare Part D drugs by claim count, 2023
- Fentanyl
Fentanyl
156 claims
- Furosemide
Furosemide
136 claims
- Quetiapine Fumarate
Quetiapine Fumarate
130 claims
- Levothyroxine Sodium
Levothyroxine Sodium
112 claims
- Eliquis
Eliquis
76 claims
- Buspirone Hcl
Buspirone Hcl
74 claims
- Atorvastatin Calcium
Atorvastatin Calcium
63 claims
- Metoprolol Succinate
Metoprolol Succinate
63 claims
| Drug | Claims |
|---|---|
| Fentanyl | 156 |
| Furosemide | 136 |
| Quetiapine Fumarate | 130 |
| Levothyroxine Sodium | 112 |
| Eliquis Apixaban | 76 |
| Buspirone Hcl | 74 |
| Atorvastatin Calcium | 63 |
| Metoprolol Succinate | 63 |
| Mirtazapine | 61 |
| Omeprazole | 61 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Gerontology Nurse Practitioner Overview
How Kathleen Guilmain, APRN GNP-BC fits within the Gerontology Nurse Practitioner landscape nationally.
9,706
Gerontology Nurse Practitioner Providers in US
54
States with Gerontology Nurse Practitioner
1,283
Avg Claims per Provider
Kathleen Guilmain, APRN GNP-BC's 3,033 claims are above the specialty average of 1,283.
Nearby Gerontology Nurse Practitioner Providers in New Hampshire
Other clinicians with the same primary specialty enrolled in New Hampshire, drawn from the same CMS NPPES roster as Guilmain.
Dr. Cassidy Abrahamson
NP
Bedford, NH
Dr. Joanne Anctil
ARNP
Manchester, NH
Dr. Catherine Anton
APRN
Lebanon, NH
Dr. Doris Barratt
ARNP
Unity, NH
Dr. Ashley Bertolami
RN, MSN, AGNP
Nashua, NH
Compare Gerontology Nurse Practitioner 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 New Hampshire medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Gerontology Nurse Practitioner 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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Medical Specialties Explained
Who treats what and how specialties differ
Understanding Medicare Claims Data
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How insurance networks affect your costs
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Explore New Hampshire
Frequently Asked Questions
What is Kathleen Guilmain, APRN GNP-BC's specialty? ▼
Kathleen Guilmain, APRN GNP-BC specializes in Gerontology Nurse Practitioner and practices in North Haverhill, New Hampshire. Credentials: APRN GNP-BC.
How much does Kathleen Guilmain, APRN GNP-BC prescribe under Medicare Part D? ▼
In 2023, Kathleen Guilmain, APRN GNP-BC wrote 3,033 Medicare Part D claims totaling $283K in drug costs for 73 beneficiaries.
Where is Kathleen Guilmain, APRN GNP-BC located? ▼
Kathleen Guilmain, APRN GNP-BC is located at 299 COUNTRY LAND DR, North Haverhill, NH, 03774. Phone: (603) 747-4161.
What is Kathleen Guilmain, APRN GNP-BC's NPI number? ▼
Kathleen Guilmain, APRN GNP-BC's National Provider Identifier (NPI) is 1093000648, issued on 06/12/2011.
Does Kathleen Guilmain, APRN GNP-BC prescribe opioids? ▼
Yes, Kathleen Guilmain, APRN GNP-BC had 264 opioid claims in 2023 with an opioid prescribing rate of 8.7%.
How many Gerontology Nurse Practitioner providers are there in the US? ▼
There are 9,706 Gerontology Nurse Practitioner providers across 54 states in the US. The average Gerontology Nurse Practitioner provider writes 1,283 Medicare Part D claims per year.
What drugs does Kathleen Guilmain, APRN GNP-BC prescribe most often? ▼
Based on 2023 Medicare Part D data, Kathleen Guilmain, APRN GNP-BC's most frequently prescribed drugs include Fentanyl, Furosemide, Quetiapine Fumarate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Kathleen Guilmain, APRN GNP-BC accept Medicare? ▼
Kathleen Guilmain, APRN GNP-BC appears in CMS Medicare data with 3,033 Part D claims and 73 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Kathleen Guilmain, APRN GNP-BC's credentials? ▼
Kathleen Guilmain, APRN GNP-BC's NPI is 1093000648 with credentials APRN GNP-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.