NPI registry status
Active
2026 NPPES data Neurology Physician NPI 1487898458 MD
Verify on CMS → Ann Collier, MD
Neurology 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 19,866 in Neurology 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
2K
Medicare Part D claims · 183 beneficiaries · Neurology Physician avg: 1K
Generic prescribing
71%
generic claims · 28% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$1.3K
7 payments · CMS Open Payments (Sunshine Act)
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
Ann Collier, MD filed 1,626 Medicare Part D claims in 2023 as a Neurology Physician in Billings, Montana, prescribing 71% generic.
- 2K
- Part D claims, 2023
- 71%
- 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.
Ann Collier, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
1,626 Top 18% higher than 82% 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)
Ann Collier, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 10 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 Ann Collier, MD?
Quality data not reportedPrimary specialty
Neurology Physician
Medicare Part D claims
1,626 24% vs specialty avg
Specialty distribution in Montana
How Neurology 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 Neurology 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).
Ann Collier, MD appears in the CMS NPPES registry as a Neurology Physician provider holding MD credentials at 801 N 29TH ST, Billings, MT, 59101, with a listed phone of (406) 238-2500. NPI 1487898458 was issued on 04/21/2009.
Medicare Part D records for calendar year 2023 show 1,626 prescription claims written by this provider, covering 183 Medicare beneficiaries and totaling roughly $870K in drug spend, split 28% brand-name and 71% generic by claim count.
Neurology Physician is a mid-sized specialty nationwide, with 19,866 enrolled providers across 54 states and an average of 1,309 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 | 1487898458 |
|---|---|
| Specialty | Neurology Physician |
| Credentials | MD |
| Gender | Female |
| NPI Issued | 04/21/2009 |
Hospital and facility affiliations
Facilities where Ann Collier, MD 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.
According to CMS billing records, Ann Collier, MD is affiliated with 10 Medicare-billing facilities across 10 states.
Adventist Health System Georgia Inc
Calhoun, GA
Freeman-Oak Hill Health System
Joplin, MO
Hendricks County Hospital
Danville, IN
North Oaks Medical Center LLC
Hammond, LA
Northern Inyo Healthcare District
Bishop, CA
Novant Health Medical Group, LLC
Charlotte, NC
Riverside Health System
Willmington, IL
Vidant Medical Group LLC
Grand Junction, CO
Wellmont Medical Associates Inc
Kingsport, TN
Wyoming County
Warsaw, NY
Critical Access Hospitals
CMS CCN: 331323
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Industry payments received (2024) - CMS Open Payments transparency data
The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for Ann Collier, MD. Source: openpaymentsdata.cms.gov.
Total received
$1.3K
Largest payer
UCB, Inc.
Most common payment type
Food and Beverage
Industry payments are not necessarily indicators of bias, they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.
Brand vs generic prescribing mix · Above average
Ann Collier, MD - brand share 28.0%
Neurology Physician average
28% brand-name claims vs 71% generic, on 1,626 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.
1,626
Total Claims
$870K
Total Drug Cost
183
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 2,576
- Total Day Supply
- 75,108
- Brand vs Generic
- 28% brand / 71% generic
- Brand Drug Cost
- $775K
- Generic Drug Cost
- $94K
Patient Demographics
- Average Patient Age
- 60.5 years
- Avg HCC Risk Score
- 1.21
- Gender Split
- 51% female / 49% male
- Age Distribution
- <65: 93, 65-74: 57, 75-84: N/A, 85+: N/A
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Ann Collier, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Levetiracetam
Levetiracetam
248 claims
- Lamotrigine
Lamotrigine
176 claims
- Xcopri
Xcopri
157 claims
- Lacosamide
Lacosamide
135 claims
- Clobazam
Clobazam
124 claims
- Briviact 95
Briviact
95 claims
- Topiramate 62
Topiramate
62 claims
- Divalproex Sodium 61
Divalproex Sodium
61 claims
| Drug | Claims |
|---|---|
| Levetiracetam | 248 |
| Lamotrigine | 176 |
| Xcopri Cenobamate | 157 |
| Lacosamide | 135 |
| Clobazam | 124 |
| Briviact Brivaracetam | 95 |
| Topiramate | 62 |
| Divalproex Sodium | 61 |
| Zonisamide | 38 |
| Emgality Pen Galcanezumab-Gnlm | 37 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Neurology Physician Overview
How Ann Collier, MD fits within the Neurology Physician landscape nationally.
19,866
Neurology Physician Providers in US
54
States with Neurology Physician
1,309
Avg Claims per Provider
Ann Collier, MD's 1,626 claims are above the specialty average of 1,309.
Nearby Neurology Physician Providers in Montana
Other clinicians with the same primary specialty enrolled in Montana, drawn from the same CMS NPPES roster as Collier.
Dr. Steven Arbogast
D.O.
Billings, MT
Dr. Matthew Bain
MD
Bozeman, MT
Gauhar Chaudhary
Billings, MT
Dr. Wynde Cheek
D.O.
Helena, MT
Dr. Nicole Clark
MD
Helena, MT
Compare Neurology 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 Neurology 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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Explore Montana
Frequently Asked Questions
What is Ann Collier, MD's specialty? ▼
Ann Collier, MD specializes in Neurology Physician and practices in Billings, Montana. Credentials: MD.
How much does Ann Collier, MD prescribe under Medicare Part D? ▼
In 2023, Ann Collier, MD wrote 1,626 Medicare Part D claims totaling $870K in drug costs for 183 beneficiaries.
Where is Ann Collier, MD located? ▼
Ann Collier, MD is located at 801 N 29TH ST, Billings, MT, 59101. Phone: (406) 238-2500.
What is Ann Collier, MD's NPI number? ▼
Ann Collier, MD's National Provider Identifier (NPI) is 1487898458, issued on 04/21/2009.
Does Ann Collier, MD prescribe more brand-name or generic drugs? ▼
Ann Collier, MD's prescribing is 28% brand-name and 71% generic drugs by claim count, with $775K in brand drug costs.
How many Neurology Physician providers are there in the US? ▼
There are 19,866 Neurology Physician providers across 54 states in the US. The average Neurology Physician provider writes 1,309 Medicare Part D claims per year.
What drugs does Ann Collier, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Ann Collier, MD's most frequently prescribed drugs include Levetiracetam, Lamotrigine, Xcopri. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Ann Collier, MD accept Medicare? ▼
Ann Collier, MD appears in CMS Medicare data with 1,626 Part D claims and 183 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Ann Collier, MD's credentials? ▼
Ann Collier, MD's NPI is 1487898458 with credentials MD. 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.