2026 NPPES data Primary Care Nurse Practitioner NPI 1598288144 FNP
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BONNIE GEHRKE, FNP

Primary Care Nurse Practitioner in CASA GRANDE, Arizona. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
2K
Medicare Part D claims · 385 beneficiaries · Primary Care Nurse Practitioner avg: 1K
Generic prescribing
88%
generic claims · 12% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$39.77
2 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

BONNIE GEHRKE, FNP filed 1,672 Medicare Part D claims in 2023 as a Primary Care Nurse Practitioner in CASA GRANDE, Arizona, prescribing 88% generic.

2K
Part D claims, 2023
88%
generic prescribing
$39.77
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.

BONNIE GEHRKE, FNP's Medicare Part D volume vs every U.S. prescriber

Total Medicare Part D claims, 2023 — across all CMS prescribers nationally

1,672 Top 18% higher than 82% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). Below this entry. 400–600: 90,619 prescribers (7%). Below this entry. 600–800: 56,224 prescribers (4%). Below this entry. 800–1,000: 40,919 prescribers (3%). Below this entry. 1,000–1,200: 31,827 prescribers (2%). Below this entry. 1,200–1,400: 26,224 prescribers (2%). Below this entry. 1,400–1,600: 21,710 prescribers (2%). Below this entry. 1,600–1,800: 19,072 prescribers (1%). This entry sits in this band. 1,800–2,000: 16,451 prescribers (1%). Above this entry. 2,000–2,200: 213,991 prescribers (16%). Above this entry. This provider 0 2K+ every Part D prescriber (claims/yr), bucketed by value

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 BONNIE GEHRKE, FNP?

Quality data not reported

NPI registry status

Active

Issued 07/25/2017

NPI 1598288144

Primary specialty

Primary Care Nurse Practitioner

Mid-sized

10,138 US NPIs in this specialty

Medicare Part D claims

1,672 23% vs specialty avg

2023 prescription claims

Specialty avg: 1,363

Specialty distribution in Arizona

How Primary Care Nurse Practitioner compares to other specialties among Arizona providers

Arizona providers

Primary Care Nurse Practitioner share within Arizona

1. Primary Care Nurse Practitioner42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Primary Care Nurse Practitioner share within Arizona

Specialty board-certification context

Estimated specialty board-certified rate — Primary Care Nurse Practitioner (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Primary Care Nurse Practitioner ABMS/AOA estimate

Est. board-certified rate (Primary Care Nurse Practitioner) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Primary Care Nurse Practitioner) — ABMS / AOA estimate

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).

BONNIE GEHRKE, FNP appears in the CMS NPPES registry as a Primary Care Nurse Practitioner provider holding FNP credentials at 560 N CAMINO MERCADO STE 7, CASA GRANDE, AZ, 85122, with a listed phone of (520) 836-5538. NPI 1598288144 was issued on 07/25/2017. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what GEHRKE most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

Medicare Part D records for calendar year 2023 show 1,672 prescription claims written by this provider, covering 385 Medicare beneficiaries and totaling roughly $160K in drug spend, split 12% brand-name and 88% generic by claim count, with an opioid prescribing rate of 2.0%. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy.

Primary Care Nurse Practitioner is a mid-sized specialty nationwide, with 10,138 enrolled providers across 54 states and an average of 1,363 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

560 N CAMINO MERCADO STE 7
CASA GRANDE, AZ 85122

Provider Details

NPI 1598288144
Specialty Primary Care Nurse Practitioner
Credentials FNP
Gender Female
NPI Issued 07/25/2017

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 BONNIE GEHRKE, FNP. Source: openpaymentsdata.cms.gov.

Total received

$40

Largest payer

Phadia US 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.

Brand vs generic prescribing mix · Typical

BONNIE GEHRKE, FNP — brand share 12.0%
Specialty average (est.)

12% brand-name claims vs 88% generic, on 1,672 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.

1,672
Total Claims
$160K
Total Drug Cost
385
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
3,537
Total Day Supply
99,773
Brand vs Generic
12% brand / 88% generic
Brand Drug Cost
$136K
Generic Drug Cost
$24K
Opioid Claims
33 (2.0% rate)
Antibiotic Claims
135

Patient Demographics

Average Patient Age
71.7 years
Avg HCC Risk Score
1.18
Gender Split
68% female / 32% male
Age Distribution
<65: 36, 65-74: 225, 75-84: 107, 85+: 17

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

What BONNIE GEHRKE, FNP prescribes most

Top Medicare Part D drugs by claim count, 2023

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2023
Drug Claims
Lisinopril
75
Levothyroxine Sodium
65
Atorvastatin Calcium
64
Azithromycin
49
Metformin Hcl
49
Gabapentin
39
Losartan Potassium
36
Ciprofloxacin Hcl
33
Amlodipine Besylate
30
Trazodone Hcl
30

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

Primary Care Nurse Practitioner Overview

How BONNIE GEHRKE, FNP fits within the Primary Care Nurse Practitioner landscape nationally.

10,138
Primary Care Nurse Practitioner Providers in US
54
States with Primary Care Nurse Practitioner
1,363
Avg Claims per Provider

BONNIE GEHRKE, FNP's 1,672 claims are above the specialty average of 1,363.

Nearby Primary Care Nurse Practitioner Providers in Arizona

Other clinicians with the same primary specialty enrolled in Arizona, drawn from the same CMS NPPES roster as GEHRKE.

Compare Primary Care Nurse Practitioner nationally: see state-by-state distribution →

Frequently Asked Questions

What is BONNIE GEHRKE, FNP's specialty?
BONNIE GEHRKE, FNP specializes in Primary Care Nurse Practitioner and practices in CASA GRANDE, Arizona. Credentials: FNP.
How much does BONNIE GEHRKE, FNP prescribe under Medicare Part D?
In 2023, BONNIE GEHRKE, FNP wrote 1,672 Medicare Part D claims totaling $160K in drug costs for 385 beneficiaries.
Where is BONNIE GEHRKE, FNP located?
BONNIE GEHRKE, FNP is located at 560 N CAMINO MERCADO STE 7, CASA GRANDE, AZ, 85122. Phone: (520) 836-5538.
What is BONNIE GEHRKE, FNP's NPI number?
BONNIE GEHRKE, FNP's National Provider Identifier (NPI) is 1598288144, issued on 07/25/2017.
Does BONNIE GEHRKE, FNP prescribe more brand-name or generic drugs?
BONNIE GEHRKE, FNP's prescribing is 12% brand-name and 88% generic drugs by claim count, with $136K in brand drug costs.
Does BONNIE GEHRKE, FNP prescribe opioids?
Yes, BONNIE GEHRKE, FNP had 33 opioid claims in 2023 with an opioid prescribing rate of 2.0%.
How many Primary Care Nurse Practitioner providers are there in the US?
There are 10,138 Primary Care Nurse Practitioner providers across 54 states in the US. The average Primary Care Nurse Practitioner provider writes 1,363 Medicare Part D claims per year.
What drugs does BONNIE GEHRKE, FNP prescribe most often?
Based on 2023 Medicare Part D data, BONNIE GEHRKE, FNP's most frequently prescribed drugs include Lisinopril, Levothyroxine Sodium, Atorvastatin Calcium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does BONNIE GEHRKE, FNP accept Medicare?
BONNIE GEHRKE, FNP appears in CMS Medicare data with 1,672 Part D claims and 385 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify BONNIE GEHRKE, FNP's credentials?
BONNIE GEHRKE, FNP's NPI is 1598288144 with credentials FNP. 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

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