2026 NPPES data Family Medicine Physician NPI 1275896946 DO
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CHARLES MILLER, DO

Family Medicine Physician in APPLETON, 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
10K
Medicare Part D claims · 748 beneficiaries · Family Medicine Physician avg: 3K
Generic prescribing
90%
generic claims · 10% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
77.7756/100
▼ 5 pts below national avg 83.1 · [object Object]

What the federal data shows

CHARLES MILLER, DO reported a CMS MIPS final score of 77.7756/100 — below the 83.1 national average — and filed 10,340 Medicare Part D claims in 2023.

77.7756/100
MIPS score · -5 vs avg
10K
Part D claims, 2023
90%
generic prescribing
Likely
board-certified (heuristic)

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.

CHARLES MILLER, DO's MIPS score vs every scored U.S. clinician

CMS Merit-based Incentive Payment System (MIPS) final score, 2023 — the federal quality measure

78 24th percentile higher than 24% of 477,587 scored providers

0–10: 8,684 scored providers (2%). Below this entry. 10–20: 3,008 scored providers (1%). Below this entry. 20–30: 3,069 scored providers (1%). Below this entry. 30–40: 2,746 scored providers (1%). Below this entry. 40–50: 2,928 scored providers (1%). Below this entry. 50–60: 5,882 scored providers (1%). Below this entry. 60–70: 13,906 scored providers (3%). Below this entry. 70–80: 118,074 scored providers (25%). This entry sits in this band. 80–90: 129,887 scored providers (27%). Above this entry. 90–100: 189,403 scored providers (40%). Above this entry. This provider 0 100 every MIPS-scored clinician, bucketed by value

Each bar is a band; taller bars hold more scored providers. 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 Merit-based Incentive Payment System (MIPS) · 2023

Board certification likely (heuristic — not verified)

CHARLES MILLER, DO practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 1 hospital affiliation — signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).

What does the federal data show about CHARLES MILLER, DO?

Below national average

NPI registry status

Active

Issued 06/19/2012

NPI 1275896946

Primary specialty

Family Medicine Physician

High-volume

147,640 US NPIs in this specialty

Medicare Part D claims

10,340 203% vs specialty avg

2023 prescription claims

Specialty avg: 3,418

MIPS final score

77.7756/100 5.324399999999997% pts

Above neutral band

vs 83.1 national avg

Specialty distribution in Wisconsin

How Family Medicine Physician compares to other specialties among Wisconsin providers

Wisconsin providers

Family Medicine Physician share within Wisconsin

1. Family Medicine Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Family Medicine Physician share within Wisconsin

Medicare quality performance — MIPS

CHARLES MILLER, DO's 2023 MIPS final score plotted against the Family Medicine Physician national average

Below national average
MIPS Final Score
77.7756/100
vs 83.1 national avg · 2023 performance year

MIPS final score (Family Medicine Physician) — 77.7756/100 vs national avg 83.1

0%100%National avg83%77.8%
MIPS final score (Family Medicine Physician) — 77.7756/100 vs national avg 83.1

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).

CHARLES MILLER, DO appears in the CMS NPPES registry as a Family Medicine Physician provider holding DO credentials at 3329 N RICHMOND ST, APPLETON, WI, 54911, with a listed phone of (920) 380-2715. NPI 1275896946 was issued on 06/19/2012. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what MILLER 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 10,340 prescription claims written by this provider, covering 748 Medicare beneficiaries and totaling roughly $952K in drug spend, split 10% brand-name and 90% generic by claim count, with an opioid prescribing rate of 1.2%. 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. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 77.7756/100 for the 2023 performance year (Quality 77.471, Cost 63.8013), compared with the national average of 83.1.

Family Medicine Physician is a high-volume specialty nationwide, with 147,640 enrolled providers across 56 states and an average of 3,418 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

3329 N RICHMOND ST
APPLETON, WI 54911

Provider Details

NPI 1275896946
Specialty Family Medicine Physician
Credentials DO
Gender Male
NPI Issued 06/19/2012

CMS Quality Score (MIPS)

Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.

77.7756
Final Score
Avg: 83.1
77.471
Quality
63.8013
Cost
77
Promoting Interoperability

Reporting: Group practice

Hospital and facility affiliations

Facilities where CHARLES MILLER, DO bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" — a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.

ASCENSION MEDICAL GROUP-FOX VALLEY WISCONSIN INC
APPLETON, WI

Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).

Brand vs generic prescribing mix · Typical

CHARLES MILLER, DO — brand share 10.0%
Specialty average (est.)

10% brand-name claims vs 90% generic, on 10,340 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.

10,340
Total Claims
$952K
Total Drug Cost
748
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
24,965
Total Day Supply
739,705
Brand vs Generic
10% brand / 90% generic
Brand Drug Cost
$711K
Generic Drug Cost
$238K
Opioid Claims
123 (1.2% rate)
Antibiotic Claims
45

Patient Demographics

Average Patient Age
73.7 years
Avg HCC Risk Score
1.13
Gender Split
31% female / 69% male
Age Distribution
<65: 70, 65-74: 338, 75-84: 254, 85+: 86

Top Prescribed Drugs (Medicare Part D)

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

What CHARLES MILLER, DO 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
Atorvastatin Calcium
844
Amlodipine Besylate
510
Lisinopril
444
Losartan Potassium
443
Omeprazole
360
Metformin Hcl
357
Hydrochlorothiazide
320
Levothyroxine Sodium
312
Simvastatin
246
Metoprolol Succinate
231

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

Family Medicine Physician Overview

How CHARLES MILLER, DO fits within the Family Medicine Physician landscape nationally.

147,640
Family Medicine Physician Providers in US
56
States with Family Medicine Physician
3,418
Avg Claims per Provider

CHARLES MILLER, DO's 10,340 claims are above the specialty average of 3,418.

Nearby Family Medicine Physician Providers in Wisconsin

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

Compare Family Medicine Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is CHARLES MILLER, DO's specialty?
CHARLES MILLER, DO specializes in Family Medicine Physician and practices in APPLETON, Wisconsin. Credentials: DO.
How much does CHARLES MILLER, DO prescribe under Medicare Part D?
In 2023, CHARLES MILLER, DO wrote 10,340 Medicare Part D claims totaling $952K in drug costs for 748 beneficiaries.
What is CHARLES MILLER, DO's Medicare quality score?
CHARLES MILLER, DO has a CMS MIPS Final Score of 77.7756/100 (Quality: 77.471, Cost: 63.8013). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is CHARLES MILLER, DO located?
CHARLES MILLER, DO is located at 3329 N RICHMOND ST, APPLETON, WI, 54911. Phone: (920) 380-2715.
What is CHARLES MILLER, DO's NPI number?
CHARLES MILLER, DO's National Provider Identifier (NPI) is 1275896946, issued on 06/19/2012.
Does CHARLES MILLER, DO prescribe more brand-name or generic drugs?
CHARLES MILLER, DO's prescribing is 10% brand-name and 90% generic drugs by claim count, with $711K in brand drug costs.
Does CHARLES MILLER, DO prescribe opioids?
Yes, CHARLES MILLER, DO had 123 opioid claims in 2023 with an opioid prescribing rate of 1.2%.
How many Family Medicine Physician providers are there in the US?
There are 147,640 Family Medicine Physician providers across 56 states in the US. The average Family Medicine Physician provider writes 3,418 Medicare Part D claims per year.
What drugs does CHARLES MILLER, DO prescribe most often?
Based on 2023 Medicare Part D data, CHARLES MILLER, DO's most frequently prescribed drugs include Atorvastatin Calcium, Amlodipine Besylate, Lisinopril. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does CHARLES MILLER, DO accept Medicare?
CHARLES MILLER, DO appears in CMS Medicare data with 10,340 Part D claims and 748 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify CHARLES MILLER, DO's credentials?
CHARLES MILLER, DO's NPI is 1275896946 with credentials DO. 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.
Quality Performance
CMS Merit-based Incentive Payment System (MIPS) — 2023 performance year.
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