NPI registry status
Active
2026 NPPES data Women's Health Nurse Practitioner NPI 1811605421 WHNP
Verify on CMS → Dyan Hahn, WHNP
Women's Health Nurse Practitioner in Indianapolis, 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 9,452 in Women's Health 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
39
Medicare Part D claims · 18 beneficiaries · Women's Health Nurse Practitioner avg: 262
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Dyan Hahn, WHNP filed 39 Medicare Part D claims in 2023 as a Women's Health Nurse Practitioner in Indianapolis, Indiana.
- 39
- 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.
Dyan Hahn, WHNP's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
39 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 Dyan Hahn, WHNP?
Quality data not reportedPrimary specialty
Women's Health Nurse Practitioner
Medicare Part D claims
39 85% vs specialty avg
Specialty distribution in Indiana
How Women's Health Nurse Practitioner 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 Women's Health 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).
Dyan Hahn, WHNP appears in the CMS NPPES registry as a Women's Health Nurse Practitioner provider holding WHNP credentials at 2855 N KEYSTONE AVE STE 100, Indianapolis, IN, 46218, with a listed phone of (317) 957-2300. NPI 1811605421 was issued on 11/11/2022.
Medicare Part D records for calendar year 2023 show 39 prescription claims written by this provider, covering 18 Medicare beneficiaries and totaling roughly $2K in drug spend.
Women's Health Nurse Practitioner is a mid-sized specialty nationwide, with 9,452 enrolled providers across 55 states and an average of 262 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 | 1811605421 |
|---|---|
| Specialty | Women's Health Nurse Practitioner |
| Credentials | WHNP |
| Gender | Female |
| NPI Issued | 11/11/2022 |
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
39
Total Claims
$2K
Total Drug Cost
18
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 39
- Total Day Supply
- 475
- Generic Drug Cost
- $1K
Patient Demographics
- Average Patient Age
- 48.3 years
- Avg HCC Risk Score
- 0.93
- Gender Split
- 100% female / 0% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
| Drug | Claims |
|---|---|
| Fluconazole | 13 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Women's Health Nurse Practitioner Overview
How Dyan Hahn, WHNP fits within the Women's Health Nurse Practitioner landscape nationally.
9,452
Women's Health Nurse Practitioner Providers in US
55
States with Women's Health Nurse Practitioner
262
Avg Claims per Provider
Dyan Hahn, WHNP's 39 claims are below the specialty average of 262.
Nearby Women's Health Nurse Practitioner Providers in Indiana
Other clinicians with the same primary specialty enrolled in Indiana, drawn from the same CMS NPPES roster as Hahn.
Dr. Christina Adamopoulos
WHNP
Indianapolis, IN
Dr. Marcy Aldrich
WHNP-BC
Terre Haute, IN
Dr. Aimee Anderson
WHNP-BC
Indianapolis, IN
Dr. Trista Anderson
NP
Indianapolis, IN
Dr. Michelle Ansley
NP
Indianapolis, IN
Compare Women's Health 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 Indiana medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Women's Health 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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How to Find a Doctor
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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 Indiana
Frequently Asked Questions
What is Dyan Hahn, WHNP's specialty? ▼
Dyan Hahn, WHNP specializes in Women's Health Nurse Practitioner and practices in Indianapolis, Indiana. Credentials: WHNP.
How much does Dyan Hahn, WHNP prescribe under Medicare Part D? ▼
In 2023, Dyan Hahn, WHNP wrote 39 Medicare Part D claims totaling $2K in drug costs for 18 beneficiaries.
Where is Dyan Hahn, WHNP located? ▼
Dyan Hahn, WHNP is located at 2855 N KEYSTONE AVE STE 100, Indianapolis, IN, 46218. Phone: (317) 957-2300.
What is Dyan Hahn, WHNP's NPI number? ▼
Dyan Hahn, WHNP's National Provider Identifier (NPI) is 1811605421, issued on 11/11/2022.
How many Women's Health Nurse Practitioner providers are there in the US? ▼
There are 9,452 Women's Health Nurse Practitioner providers across 55 states in the US. The average Women's Health Nurse Practitioner provider writes 262 Medicare Part D claims per year.
What drugs does Dyan Hahn, WHNP prescribe most often? ▼
Based on 2023 Medicare Part D data, Dyan Hahn, WHNP's most frequently prescribed drugs include Fluconazole. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Dyan Hahn, WHNP accept Medicare? ▼
Dyan Hahn, WHNP appears in CMS Medicare data with 39 Part D claims and 18 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Dyan Hahn, WHNP's credentials? ▼
Dyan Hahn, WHNP's NPI is 1811605421 with credentials WHNP. 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.