NPI registry status
Active
2026 NPPES data Family Medicine Physician NPI 1558478370 M.D.
Verify on CMS → Janet Millermaier, M.D.
Family Medicine Physician in Coopersville, Michigan.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 147,760 in Family Medicine Physician, 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
1K
Medicare Part D claims · 98 beneficiaries · Family Medicine Physician avg: 3K
What the federal data shows
Janet Millermaier, M.D. filed 1,206 Medicare Part D claims in 2023 as a Family Medicine Physician in Coopersville, Michigan.
- 1K
- Part D claims, 2023
- ≥78th
- pct by Part D claim volume (lower-bound band)
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.
CMS NPPES provider registry desk
NPI 1558478370 · Family Medicine Physician
NPI-10 · ENUM-LEGACY · TAX-MEGA · RX-MID · BOOK-MID · PHOTO-ENUM
- NPI-10 1558478370
- ENUM-LEGACY 2006
- TAX-MEGA 148K Family Medicine
- RX-MID 1,206
- BOOK-MID 5,662 in Michigan
- PHOTO-ENUM Gary Safier · 2006
Janet Millermaier, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
1,206 ≥ 78th percentile 78% of 1,370,886 prescribers are in lower value bands
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.
The percentile is a conservative 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2023
◑
Board-eligible specialty (heuristic, not verified)
Janet Millermaier, M.D. practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Janet Millermaier, M.D.?
Quality data not reportedPrimary specialty
Family Medicine Physician
Medicare Part D claims
1,206 65% vs specialty avg
Specialty distribution in Michigan
How Family Medicine Physician compares to other specialties among Michigan 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 Family Medicine Physician. 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).
Practice Address
Provider Details
| NPI | 1558478370 |
|---|---|
| Specialty | Family Medicine Physician |
| Credentials | M.D. |
| Gender | Female |
| NPI Issued | 08/25/2006 |
License & disciplinary context - Michigan MI-BOM 2023 annual report
Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~41K Michigan medical licensees in 2023 - they are NOT specific to Janet Millermaier, M.D.. To verify Janet Millermaier, M.D.'s current license status, search the MI-BOM public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
123
Total board actions, Michigan 2023
Across 120 cases
3.00
Actions per 1,000 licensees
Michigan statewide rate
probation
Most common action type
44 cases
MI-BOM publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the Michigan disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
1,206
Total Claims
$97K
Total Drug Cost
98
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 2,862
- Total Day Supply
- 84,827
- Generic Drug Cost
- $31K
- Opioid Claims
- 20 (1.7% rate)
Patient Demographics
- Average Patient Age
- 74.6 years
- Avg HCC Risk Score
- 1.08
- Gender Split
- 63% female / 37% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Janet Millermaier, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Atorvastatin Calcium
Atorvastatin Calcium
122 claims
- Levothyroxine Sodium
Levothyroxine Sodium
54 claims
- Omeprazole 46
Omeprazole
46 claims
- Metformin Hcl Er 45
Metformin Hcl Er
45 claims
- Hydrochlorothiazide 41
Hydrochlorothiazide
41 claims
- Amlodipine Besylate 39
Amlodipine Besylate
39 claims
- Metoprolol Succinate 39
Metoprolol Succinate
39 claims
- Gabapentin 30
Gabapentin
30 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 122 |
| Levothyroxine Sodium | 54 |
| Omeprazole | 46 |
| Metformin Hcl Er Metformin Hcl | 45 |
| Hydrochlorothiazide | 41 |
| Amlodipine Besylate | 39 |
| Metoprolol Succinate | 39 |
| Gabapentin | 30 |
| Lisinopril | 30 |
| Losartan Potassium | 24 |
* 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 Janet Millermaier, M.D. fits within the Family Medicine Physician landscape nationally.
147,760
Family Medicine Physician Providers in US
56
States with Family Medicine Physician
3,418
Avg Claims per Provider
Janet Millermaier, M.D.'s 1,206 claims are below the specialty average of 3,418.
Nationwide Family Medicine Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Millermaier, both outside Michigan so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2006)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Family Medicine Physician Providers in Michigan
Other clinicians with the same primary specialty enrolled in Michigan, drawn from the same CMS NPPES roster as Millermaier.
One of 5,662 Family Medicine Physician providers enrolled in Michigan, 5 are shown here.
Asma Abbas
Hamtramck, MI
Dr. Saadia Abbas
MD
Chesterfield, MI
Faezeh Abbasi
Monroe, MI
Dr. Marisa Abbo
DO
Rochester Hills, MI
Dr. Cathleen Abbott
M.D.
East Lansing, MI
Compare Family Medicine Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Janet Millermaier, M.D.'s specialty? ▼
Janet Millermaier, M.D. specializes in Family Medicine Physician and practices in Coopersville, Michigan. Credentials: M.D..
How much does Janet Millermaier, M.D. prescribe under Medicare Part D? ▼
In 2023, Janet Millermaier, M.D. wrote 1,206 Medicare Part D claims totaling $97K in drug costs for 98 beneficiaries.
Where is Janet Millermaier, M.D. located? ▼
Janet Millermaier, M.D. is located at 25 CONRAN DRIVE, Coopersville, MI, 49504. Phone: (616) 267-7860.
What is Janet Millermaier, M.D.'s NPI number? ▼
Janet Millermaier, M.D.'s National Provider Identifier (NPI) is 1558478370, issued on 08/25/2006.
Does Janet Millermaier, M.D. prescribe opioids? ▼
Yes, Janet Millermaier, M.D. had 20 opioid claims in 2023 with an opioid prescribing rate of 1.7%.
How many Family Medicine Physician providers are there in the US? ▼
There are 147,760 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 Janet Millermaier, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Janet Millermaier, M.D.'s most frequently prescribed drugs include Atorvastatin Calcium, Levothyroxine Sodium, Omeprazole. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Janet Millermaier, M.D. accept Medicare? ▼
Janet Millermaier, M.D. appears in CMS Medicare data with 1,206 Part D claims and 98 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Janet Millermaier, M.D.'s credentials? ▼
Janet Millermaier, M.D.'s NPI is 1558478370 with credentials M.D.. 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
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.