NPI registry status
Active
2026 NPPES data Registered Nurse NPI 1689109084 NURSE PRACTITIONER
Verify on CMS → Diane Trkulja-Castro, NURSE PRACTITIONER
Registered Nurse in Chesterton, 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 177,204 in Registered Nurse, 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
368
Medicare Part D claims · 40 beneficiaries · Registered Nurse avg: 1K
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Diane Trkulja-Castro, NURSE PRACTITIONER filed 368 Medicare Part D claims in 2023 as a Registered Nurse in Chesterton, Indiana.
- 368
- 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.
Diane Trkulja-Castro, NURSE PRACTITIONER's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
368 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 Diane Trkulja-Castro, NURSE PRACTITIONER?
Quality data not reportedPrimary specialty
Registered Nurse
Medicare Part D claims
368 63% vs specialty avg
Specialty distribution in Indiana
How Registered Nurse 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 Registered Nurse. 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).
Diane Trkulja-Castro, NURSE PRACTITIONER appears in the CMS NPPES registry as a Registered Nurse provider holding NURSE PRACTITIONER credentials at 3100 VILLAGE PT STE 250, Chesterton, IN, 46304, with a listed phone of (219) 440-4835. NPI 1689109084 was issued on 04/24/2017.
Medicare Part D records for calendar year 2023 show 368 prescription claims written by this provider, covering 40 Medicare beneficiaries and totaling roughly $37K in drug spend.
Registered Nurse is a high-volume specialty nationwide, with 177,204 enrolled providers across 56 states and an average of 1,000 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 | 1689109084 |
|---|---|
| Specialty | Registered Nurse |
| Credentials | NURSE PRACTITIONER |
| Gender | Female |
| NPI Issued | 04/24/2017 |
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
368
Total Claims
$37K
Total Drug Cost
40
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 827
- Total Day Supply
- 23,334
- Generic Drug Cost
- $5K
- Antibiotic Claims
- 26
Patient Demographics
- Average Patient Age
- 68.5 years
- Avg HCC Risk Score
- 1.16
- Gender Split
- 63% female / 38% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Diane Trkulja-Castro, NURSE PRACTITIONER prescribes most
Top Medicare Part D drugs by claim count, 2023
- Atorvastatin Calcium
Atorvastatin Calcium
28 claims
- Amlodipine Besylate
Amlodipine Besylate
27 claims
- Levothyroxine Sodium
Levothyroxine Sodium
24 claims
- Albuterol Sulfate …
Albuterol Sulfate Hfa
17 claims
- Metformin Hcl
Metformin Hcl
14 claims
- Metoprolol Succinate
Metoprolol Succinate
14 claims
- Farxiga
Farxiga
13 claims
- Sertraline Hcl
Sertraline Hcl
12 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 28 |
| Amlodipine Besylate | 27 |
| Levothyroxine Sodium | 24 |
| Albuterol Sulfate Hfa Albuterol Sulfate | 17 |
| Metformin Hcl | 14 |
| Metoprolol Succinate | 14 |
| Farxiga Dapagliflozin Propanediol | 13 |
| Sertraline Hcl | 12 |
| Alprazolam | 11 |
| Nitrofurantoin Mono-Macro Nitrofurantoin Monohyd/M-Cryst | 11 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Registered Nurse Overview
How Diane Trkulja-Castro, NURSE PRACTITIONER fits within the Registered Nurse landscape nationally.
177,204
Registered Nurse Providers in US
56
States with Registered Nurse
1,000
Avg Claims per Provider
Diane Trkulja-Castro, NURSE PRACTITIONER's 368 claims are below the specialty average of 1,000.
Nearby Registered Nurse Providers in Indiana
Other clinicians with the same primary specialty enrolled in Indiana, drawn from the same CMS NPPES roster as Trkulja-Castro.
Dr. Melinda Abbring
FNP-BC
East Chicago, IN
Dr. Ashley Acajabon
FNP-BC
Batesville, IN
Dr. Sarah Acker
RN
Indianapolis, IN
Dr. Kimberly Ackerman
FNP-C
Indianapolis, IN
Dr. Aaron Acton
RN
Indianapolis, IN
Compare Registered Nurse 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 Registered Nurse 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
What prescribing data reveals about a provider
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How insurance networks affect your costs
Telehealth Guide
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Explore Indiana
Frequently Asked Questions
What is Diane Trkulja-Castro, NURSE PRACTITIONER's specialty? ▼
Diane Trkulja-Castro, NURSE PRACTITIONER specializes in Registered Nurse and practices in Chesterton, Indiana. Credentials: NURSE PRACTITIONER.
How much does Diane Trkulja-Castro, NURSE PRACTITIONER prescribe under Medicare Part D? ▼
In 2023, Diane Trkulja-Castro, NURSE PRACTITIONER wrote 368 Medicare Part D claims totaling $37K in drug costs for 40 beneficiaries.
Where is Diane Trkulja-Castro, NURSE PRACTITIONER located? ▼
Diane Trkulja-Castro, NURSE PRACTITIONER is located at 3100 VILLAGE PT STE 250, Chesterton, IN, 46304. Phone: (219) 440-4835.
What is Diane Trkulja-Castro, NURSE PRACTITIONER's NPI number? ▼
Diane Trkulja-Castro, NURSE PRACTITIONER's National Provider Identifier (NPI) is 1689109084, issued on 04/24/2017.
How many Registered Nurse providers are there in the US? ▼
There are 177,204 Registered Nurse providers across 56 states in the US. The average Registered Nurse provider writes 1,000 Medicare Part D claims per year.
What drugs does Diane Trkulja-Castro, NURSE PRACTITIONER prescribe most often? ▼
Based on 2023 Medicare Part D data, Diane Trkulja-Castro, NURSE PRACTITIONER's most frequently prescribed drugs include Atorvastatin Calcium, Amlodipine Besylate, Levothyroxine Sodium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Diane Trkulja-Castro, NURSE PRACTITIONER accept Medicare? ▼
Diane Trkulja-Castro, NURSE PRACTITIONER appears in CMS Medicare data with 368 Part D claims and 40 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Diane Trkulja-Castro, NURSE PRACTITIONER's credentials? ▼
Diane Trkulja-Castro, NURSE PRACTITIONER's NPI is 1689109084 with credentials NURSE PRACTITIONER. 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.