NPI registry status
Active
2026 NPPES data Gerontology Nurse Practitioner NPI 1588814263 GNP-BC
Verify on CMS → Fonshay Martin, GNP-BC
Gerontology Nurse Practitioner in Denver, Colorado.
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
17
Medicare Part D claims · Gerontology Nurse Practitioner avg: 1K
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
Fonshay Martin, GNP-BC filed 17 Medicare Part D claims in 2023 as a Gerontology Nurse Practitioner in Denver, Colorado.
- 17
- 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.
Fonshay Martin, GNP-BC's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
17 0th percentile higher than 0% 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 Fonshay Martin, GNP-BC?
Quality data not reportedPrimary specialty
Gerontology Nurse Practitioner
Medicare Part D claims
17 99% vs specialty avg
Specialty distribution in Colorado
How Gerontology Nurse Practitioner compares to other specialties among Colorado 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).
Fonshay Martin, GNP-BC appears in the CMS NPPES registry as a Gerontology Nurse Practitioner provider holding GNP-BC credentials at 999 18TH ST STE 3000, Denver, CO, 80202, with a listed phone of (888) 731-8994. NPI 1588814263 was issued on 09/30/2008.
Medicare Part D records for calendar year 2023 show 17 prescription claims written by this provider, covering N/A Medicare beneficiaries and totaling roughly $289 in drug spend.
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 | 1588814263 |
|---|---|
| Specialty | Gerontology Nurse Practitioner |
| Credentials | GNP-BC |
| Gender | Female |
| NPI Issued | 09/30/2008 |
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
17
Total Claims
$289
Total Drug Cost
N/A
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 17
- Total Day Supply
- 423
- Brand Drug Cost
- $0
- Generic Drug Cost
- $289
Patient Demographics
- Average Patient Age
- 82.4 years
- Avg HCC Risk Score
- 2.21
Gerontology Nurse Practitioner Overview
How Fonshay Martin, 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
Fonshay Martin, GNP-BC's 17 claims are below the specialty average of 1,283.
Nearby Gerontology Nurse Practitioner Providers in Colorado
Other clinicians with the same primary specialty enrolled in Colorado, drawn from the same CMS NPPES roster as Martin.
Dr. Mercy Abuaba
NP-C
Aurora, CO
Dr. Clarence Adams
NP
Golden, CO
Dr. Rachel Allen
AGPCNP-BC
Parker, CO
Dr. Jenna Angerstein
CRNP
Aurora, CO
Dr. Christopher Archer
APRN
Denver, CO
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 Colorado 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
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Understanding Medicare Claims Data
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Frequently Asked Questions
What is Fonshay Martin, GNP-BC's specialty? ▼
Fonshay Martin, GNP-BC specializes in Gerontology Nurse Practitioner and practices in Denver, Colorado. Credentials: GNP-BC.
How much does Fonshay Martin, GNP-BC prescribe under Medicare Part D? ▼
In 2023, Fonshay Martin, GNP-BC wrote 17 Medicare Part D claims totaling $289 in drug costs for N/A beneficiaries.
Where is Fonshay Martin, GNP-BC located? ▼
Fonshay Martin, GNP-BC is located at 999 18TH ST STE 3000, Denver, CO, 80202. Phone: (888) 731-8994.
What is Fonshay Martin, GNP-BC's NPI number? ▼
Fonshay Martin, GNP-BC's National Provider Identifier (NPI) is 1588814263, issued on 09/30/2008.
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.
Does Fonshay Martin, GNP-BC accept Medicare? ▼
Fonshay Martin, GNP-BC appears in CMS Medicare data with 17 Part D claims and N/A Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Fonshay Martin, GNP-BC's credentials? ▼
Fonshay Martin, GNP-BC's NPI is 1588814263 with credentials 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.
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.