NPI registry status
Active
2026 NPPES data Family Medicine Physician NPI 1063625416 D.O.
Verify on CMS → Cynthia Brewer, D.O.
Family Medicine Physician in Billings, Montana.
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
7K
Medicare Part D claims · 391 beneficiaries · Family Medicine Physician avg: 3K
Generic prescribing
90%
generic claims · 9% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Cynthia Brewer, D.O. filed 6,605 Medicare Part D claims in 2023 as a Family Medicine Physician in Billings, Montana, prescribing 90% generic.
- 7K
- 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.
Cynthia Brewer, D.O.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
6,605 Top 4% higher than 96% 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
✓
Board certification likely (heuristic, not verified)
Cynthia Brewer, D.O. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 2 hospital affiliations - 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 Cynthia Brewer, D.O.?
Quality data not reportedPrimary specialty
Family Medicine Physician
Medicare Part D claims
6,605 93% vs specialty avg
Specialty distribution in Montana
How Family Medicine Physician compares to other specialties among Montana 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).
Cynthia Brewer, D.O. appears in the CMS NPPES registry as a Family Medicine Physician provider holding D.O. credentials at 801 N 29TH ST, Billings, MT, 59101, with a listed phone of (406) 238-2500. NPI 1063625416 was issued on 05/08/2007.
Medicare Part D records for calendar year 2023 show 6,605 prescription claims written by this provider, covering 391 Medicare beneficiaries and totaling roughly $461K in drug spend, split 9% brand-name and 90% generic by claim count, with an opioid prescribing rate of 2.6%.
Family Medicine Physician is a high-volume specialty nationwide, with 147,760 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
Provider Details
| NPI | 1063625416 |
|---|---|
| Specialty | Family Medicine Physician |
| Credentials | D.O. |
| Gender | Female |
| NPI Issued | 05/08/2007 |
Hospital and facility affiliations
Facilities where Cynthia Brewer, D.O. 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.
Scl Health Medical Group - Billings LLC
Billings, MT
Yellowstone City-County Health Department
Billings, MT
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 · Generic-heavy
Cynthia Brewer, D.O. - brand share 9.0%
Family Medicine Physician average
9% brand-name claims vs 90% generic, on 6,605 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.
6,605
Total Claims
$461K
Total Drug Cost
391
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 12,844
- Total Day Supply
- 371,144
- Brand vs Generic
- 9% brand / 90% generic
- Brand Drug Cost
- $340K
- Generic Drug Cost
- $120K
- Opioid Claims
- 175 (2.6% rate)
- Antibiotic Claims
- 138
Patient Demographics
- Average Patient Age
- 74.8 years
- Avg HCC Risk Score
- 1.24
- Gender Split
- 86% female / 14% male
- Age Distribution
- <65: 30, 65-74: 179, 75-84: 118, 85+: 64
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Cynthia Brewer, D.O. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Levothyroxine Sodium
Levothyroxine Sodium
380 claims
- Losartan Potassium
Losartan Potassium
350 claims
- Omeprazole
Omeprazole
212 claims
- Gabapentin
Gabapentin
210 claims
- Atorvastatin Calcium
Atorvastatin Calcium
203 claims
- Quetiapine Fumarate
Quetiapine Fumarate
170 claims
- Pantoprazole Sodium
Pantoprazole Sodium
157 claims
- Metoprolol Succinate
Metoprolol Succinate
154 claims
| Drug | Claims |
|---|---|
| Levothyroxine Sodium | 380 |
| Losartan Potassium | 350 |
| Omeprazole | 212 |
| Gabapentin | 210 |
| Atorvastatin Calcium | 203 |
| Quetiapine Fumarate | 170 |
| Pantoprazole Sodium | 157 |
| Metoprolol Succinate | 154 |
| Potassium Chloride | 154 |
| Amlodipine Besylate | 125 |
* 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 Cynthia Brewer, D.O. 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
Cynthia Brewer, D.O.'s 6,605 claims are above the specialty average of 3,418.
Nearby Family Medicine Physician Providers in Montana
Other clinicians with the same primary specialty enrolled in Montana, drawn from the same CMS NPPES roster as Brewer.
Dr. Marc Adams
MD
Shelby, MT
Dr. Dale Agner
M.D.
Billings, MT
Dr. Cynthia Alarcon
PA-C
Helena, MT
Dr. Brandon Allen
MD
Ennis, MT
Dr. Hans Amen
D.O.
Malmstrom Afb, MT
Compare Family Medicine Physician 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 Montana medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Family Medicine Physician 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.
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Frequently Asked Questions
What is Cynthia Brewer, D.O.'s specialty? ▼
Cynthia Brewer, D.O. specializes in Family Medicine Physician and practices in Billings, Montana. Credentials: D.O..
How much does Cynthia Brewer, D.O. prescribe under Medicare Part D? ▼
In 2023, Cynthia Brewer, D.O. wrote 6,605 Medicare Part D claims totaling $461K in drug costs for 391 beneficiaries.
Where is Cynthia Brewer, D.O. located? ▼
Cynthia Brewer, D.O. is located at 801 N 29TH ST, Billings, MT, 59101. Phone: (406) 238-2500.
What is Cynthia Brewer, D.O.'s NPI number? ▼
Cynthia Brewer, D.O.'s National Provider Identifier (NPI) is 1063625416, issued on 05/08/2007.
Does Cynthia Brewer, D.O. prescribe more brand-name or generic drugs? ▼
Cynthia Brewer, D.O.'s prescribing is 9% brand-name and 90% generic drugs by claim count, with $340K in brand drug costs.
Does Cynthia Brewer, D.O. prescribe opioids? ▼
Yes, Cynthia Brewer, D.O. had 175 opioid claims in 2023 with an opioid prescribing rate of 2.6%.
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 Cynthia Brewer, D.O. prescribe most often? ▼
Based on 2023 Medicare Part D data, Cynthia Brewer, D.O.'s most frequently prescribed drugs include Levothyroxine Sodium, Losartan Potassium, Omeprazole. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Cynthia Brewer, D.O. accept Medicare? ▼
Cynthia Brewer, D.O. appears in CMS Medicare data with 6,605 Part D claims and 391 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Cynthia Brewer, D.O.'s credentials? ▼
Cynthia Brewer, D.O.'s NPI is 1063625416 with credentials D.O.. 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.