2026 NPPES data Physician Assistant NPI 1891729224 P.A.
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DIANE BILLMYER, P.A.

Physician Assistant in MOUNT PLEASANT, Wisconsin. 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
513
Medicare Part D claims · 179 beneficiaries · Physician Assistant avg: 790
What the federal data reveals: DIANE BILLMYER, P.A. is a Physician Assistant ([object Object]) practicing in MOUNT PLEASANT, Wisconsin with a Medicare Part D prescribing footprint of 513 claims across 179 beneficiaries .

What stands out: DIANE BILLMYER, P.A. filed 513 Medicare Part D claims in 2023 across MOUNT PLEASANT, Wisconsin. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

DIANE BILLMYER, P.A. at a glance

Quality data not reported

NPI registry status

Active

Issued 07/10/2006

NPI 1891729224

Primary specialty

Physician Assistant

High-volume

149,975 US NPIs in this specialty

Medicare Part D claims

513 35% vs specialty avg

2023 prescription claims

Specialty avg: 790

Specialty distribution in Wisconsin

How Physician Assistant compares to other specialties among Wisconsin providers

Wisconsin providers

Physician Assistant share within Wisconsin

1. Physician Assistant42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Physician Assistant share within Wisconsin

Specialty board-certification context

Estimated specialty board-certified rate — Physician Assistant (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Physician Assistant ABMS/AOA estimate

Est. board-certified rate (Physician Assistant) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Physician Assistant) — 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).

DIANE BILLMYER, P.A. is a Physician Assistant provider practicing in MOUNT PLEASANT, Wisconsin, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: P.A.. NPI: 1891729224. This profile includes practice location, specialty classification, and organizational affiliations from the CMS provider registry. Provider information is self-reported to CMS and updated monthly.

DIANE BILLMYER, P.A. appears in the CMS NPPES registry as a Physician Assistant provider holding P.A. credentials at 13250 WASHINGTON AVE, MOUNT PLEASANT, WI, 53177, with a listed phone of (888) 720-2012. NPI 1891729224 was issued on 07/10/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what BILLMYER 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 513 prescription claims written by this provider, covering 179 Medicare beneficiaries and totaling roughly $7K in drug spend, with an opioid prescribing rate of 54.6%. 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.

Physician Assistant is a high-volume specialty nationwide, with 149,975 enrolled providers across 56 states and an average of 790 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

13250 WASHINGTON AVE
MOUNT PLEASANT, WI 53177

Provider Details

NPI 1891729224
Specialty Physician Assistant
Credentials P.A.
Gender Female
NPI Issued 07/10/2006

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2023.

513
Total Claims
$7K
Total Drug Cost
179
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
536
Total Day Supply
6,675
Generic Drug Cost
$7K
Opioid Claims
280 (54.6% rate)
Antibiotic Claims
69

Patient Demographics

Average Patient Age
71.0 years
Avg HCC Risk Score
1.25
Gender Split
70% female / 30% male
Age Distribution
<65: 25, 65-74: 97, 75-84: 46, 85+: 11

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Hydrocodone-Acetaminophen
Hydrocodone/Acetaminophen
176
Doxycycline Monohydrate
60
Meloxicam
53
Oxycodone-Acetaminophen
Oxycodone Hcl/Acetaminophen
49
Tramadol Hcl
29
Gabapentin
22
Cyclobenzaprine Hcl
20
Oxycodone Hcl
15
Celecoxib
13
Naloxone Hcl
13

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

Physician Assistant Overview

How DIANE BILLMYER, P.A. fits within the Physician Assistant landscape nationally.

149,975
Physician Assistant Providers in US
56
States with Physician Assistant
790
Avg Claims per Provider

DIANE BILLMYER, P.A.'s 513 claims are below the specialty average of 790.

Nearby Physician Assistant Providers in Wisconsin

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

Compare Physician Assistant nationally: see state-by-state distribution →

Frequently Asked Questions

What is DIANE BILLMYER, P.A.'s specialty?
DIANE BILLMYER, P.A. specializes in Physician Assistant and practices in MOUNT PLEASANT, Wisconsin. Credentials: P.A..
How much does DIANE BILLMYER, P.A. prescribe under Medicare Part D?
In 2023, DIANE BILLMYER, P.A. wrote 513 Medicare Part D claims totaling $7K in drug costs for 179 beneficiaries.
Where is DIANE BILLMYER, P.A. located?
DIANE BILLMYER, P.A. is located at 13250 WASHINGTON AVE, MOUNT PLEASANT, WI, 53177. Phone: (888) 720-2012.
What is DIANE BILLMYER, P.A.'s NPI number?
DIANE BILLMYER, P.A.'s National Provider Identifier (NPI) is 1891729224, issued on 07/10/2006.
Does DIANE BILLMYER, P.A. prescribe opioids?
Yes, DIANE BILLMYER, P.A. had 280 opioid claims in 2023 with an opioid prescribing rate of 54.6%.
How many Physician Assistant providers are there in the US?
There are 149,975 Physician Assistant providers across 56 states in the US. The average Physician Assistant provider writes 790 Medicare Part D claims per year.
What drugs does DIANE BILLMYER, P.A. prescribe most often?
Based on 2023 Medicare Part D data, DIANE BILLMYER, P.A.'s most frequently prescribed drugs include Hydrocodone-Acetaminophen, Doxycycline Monohydrate, Meloxicam. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does DIANE BILLMYER, P.A. accept Medicare?
DIANE BILLMYER, P.A. appears in CMS Medicare data with 513 Part D claims and 179 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify DIANE BILLMYER, P.A.'s credentials?
DIANE BILLMYER, P.A.'s NPI is 1891729224 with credentials P.A.. 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