NPI registry status
Active
2026 NPPES data Family Medicine Physician NPI 1811106891 M.D.
Verify on CMS → Atarah Sidey, M.D.
Family Medicine Physician in Stevensville, 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
4K
Medicare Part D claims · 259 beneficiaries · Family Medicine Physician avg: 3K
Generic prescribing
87%
generic claims · 12% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Atarah Sidey, M.D. filed 3,748 Medicare Part D claims in 2023 as a Family Medicine Physician in Stevensville, Montana, prescribing 87% generic.
- 4K
- Part D claims, 2023
- 87%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥91st
- 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 1811106891 · Family Medicine Physician
NPI-10 · ENUM-MID · TAX-MEGA · RX-MID · BOOK-LIGHT · PHOTO-ENUM
- NPI-10 1811106891
- ENUM-MID 2007
- TAX-MEGA 148K Family Medicine
- RX-MID 3,748
- BOOK-LIGHT 761 in Montana
- PHOTO-ENUM Sahoko Little · 2007
Atarah Sidey, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
3,748 ≥ 91st percentile 91% 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 certification likely (heuristic, not verified)
Atarah Sidey, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 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 Atarah Sidey, M.D.?
Quality data not reportedPrimary specialty
Family Medicine Physician
Medicare Part D claims
3,748 10% 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).
Practice Address
Provider Details
| NPI | 1811106891 |
|---|---|
| Specialty | Family Medicine Physician |
| Credentials | M.D. |
| Gender | Female |
| NPI Issued | 05/22/2007 |
Hospital and facility affiliations
Facilities where Atarah Sidey, M.D. 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.
Partnership Health Center Inc
Missoula, 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 · Typical
Atarah Sidey, M.D. - brand share 12.0%
Family Medicine Physician average
12% brand-name claims vs 87% generic, on 3,748 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.
3,748
Total Claims
$314K
Total Drug Cost
259
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 5,926
- Total Day Supply
- 165,585
- Brand vs Generic
- 12% brand / 87% generic
- Brand Drug Cost
- $259K
- Generic Drug Cost
- $53K
- Opioid Claims
- 365 (9.7% rate)
- Antibiotic Claims
- 33
Patient Demographics
- Average Patient Age
- 69.3 years
- Avg HCC Risk Score
- 1.19
- Gender Split
- 53% female / 47% male
- Age Distribution
- <65: 60, 65-74: 111, 75-84: 73, 85+: 15
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Atarah Sidey, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Hydrocodone-Acetam…
Hydrocodone-Acetaminophen
176 claims
- Lisinopril
Lisinopril
142 claims
- Atorvastatin Calcium
Atorvastatin Calcium
141 claims
- Gabapentin
Gabapentin
138 claims
- Levothyroxine Sodium
Levothyroxine Sodium
130 claims
- Losartan Potassium
Losartan Potassium
121 claims
- Metformin Hcl
Metformin Hcl
95 claims
- Amlodipine Besylate
Amlodipine Besylate
92 claims
| Drug | Claims |
|---|---|
| Hydrocodone-Acetaminophen Hydrocodone/Acetaminophen | 176 |
| Lisinopril | 142 |
| Atorvastatin Calcium | 141 |
| Gabapentin | 138 |
| Levothyroxine Sodium | 130 |
| Losartan Potassium | 121 |
| Metformin Hcl | 95 |
| Amlodipine Besylate | 92 |
| Pantoprazole Sodium | 82 |
| Trazodone Hcl | 80 |
* 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 Atarah Sidey, 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
Atarah Sidey, M.D.'s 3,748 claims are above the specialty average of 3,418.
Nationwide Family Medicine Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Sidey, both outside Montana so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2007)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
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 Sidey.
One of 761 Family Medicine Physician providers enrolled in Montana, 5 are shown here.
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 →
Frequently Asked Questions
What is Atarah Sidey, M.D.'s specialty? ▼
Atarah Sidey, M.D. specializes in Family Medicine Physician and practices in Stevensville, Montana. Credentials: M.D..
How much does Atarah Sidey, M.D. prescribe under Medicare Part D? ▼
In 2023, Atarah Sidey, M.D. wrote 3,748 Medicare Part D claims totaling $314K in drug costs for 259 beneficiaries.
Where is Atarah Sidey, M.D. located? ▼
Atarah Sidey, M.D. is located at 3800 EASTSIDE HWY, Stevensville, MT, 59870. Phone: (406) 777-2775.
What is Atarah Sidey, M.D.'s NPI number? ▼
Atarah Sidey, M.D.'s National Provider Identifier (NPI) is 1811106891, issued on 05/22/2007.
Does Atarah Sidey, M.D. prescribe more brand-name or generic drugs? ▼
Atarah Sidey, M.D.'s prescribing is 12% brand-name and 87% generic drugs by claim count, with $259K in brand drug costs.
Does Atarah Sidey, M.D. prescribe opioids? ▼
Yes, Atarah Sidey, M.D. had 365 opioid claims in 2023 with an opioid prescribing rate of 9.7%.
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 Atarah Sidey, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Atarah Sidey, M.D.'s most frequently prescribed drugs include Hydrocodone-Acetaminophen, Lisinopril, Atorvastatin Calcium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Atarah Sidey, M.D. accept Medicare? ▼
Atarah Sidey, M.D. appears in CMS Medicare data with 3,748 Part D claims and 259 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Atarah Sidey, M.D.'s credentials? ▼
Atarah Sidey, M.D.'s NPI is 1811106891 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.