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 20,467 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
207
Medicare Part D claims · 66 beneficiaries · Neurology Physician avg: 1K
Industry payments
$1.3K
7 payments · CMS Open Payments (Sunshine Act)
What the federal data shows
Ann Collier, MD filed 207 Medicare Part D claims in 2024 as a Neurology Physician in Billings, Montana.
- 207
- Part D claims, 2024
- Likely
- board-certified (heuristic)
- ≥48th
- 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.
Federal trust snapshot
What official records show about Ann Collier, MD
Federal records show an active NPI with Medicare Part D prescribing activity — verifiable registry data, not a proprietary rating.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1487898458), first enumerated 04/21/2009.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 207 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
Board certification signal
Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.
- Reported
Hospital affiliations
10 CMS Care Compare hospital affiliations on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- Reported
Industry payment transparency
$1.3K in reported industry payments (7 transfers) in 2024 under the federal Sunshine Act — disclosed transfers of value, not a quality rating.
Source: CMS Open Payments
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
CMS NPPES provider registry desk
NPI 1487898458 · Neurology Physician
NPI-10 · ENUM-MID · TAX-MID · RX-LIGHT · BOOK-THIN · PHOTO-ENUM
- NPI-10 1487898458
- ENUM-MID 2009
- TAX-MID 20K Neurology Physician
- RX-LIGHT 207
- BOOK-THIN 56 in Montana
- PHOTO-ENUM Adam De Havenon · 2009
Ann Collier, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
207 ≥ 48th percentile 48% of 1,416,883 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 · 2024
✓
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
207 85% 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).
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.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2024.
207
Total Claims
$70K
Total Drug Cost
66
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 368.833
- Total Day Supply
- 10,875
- Generic Drug Cost
- $9K
Patient Demographics
- Average Patient Age
- 60.6 years
- Avg HCC Risk Score
- 1.48
- Gender Split
- 52% female / 48% male
- Age Distribution
- <65: 33, 65-74: 22, 75-84: N/A, 85+: N/A
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Ann Collier, MD prescribes most
Top Medicare Part D drugs by claim count, 2024
- Lamotrigine
Lamotrigine
43 claims
- Levetiracetam
Levetiracetam
33 claims
- Clobazam
Clobazam
25 claims
- Divalproex Sodium
Divalproex Sodium
21 claims
| Drug | Claims |
|---|---|
| Lamotrigine | 43 |
| Levetiracetam | 33 |
| Clobazam | 25 |
| Divalproex Sodium | 21 |
* 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.
20,467
Neurology Physician Providers in US
54
States with Neurology Physician
1,356
Avg Claims per Provider
Ann Collier, MD's 207 claims are below the specialty average of 1,356.
Nationwide Neurology Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Collier, both outside Montana so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2009)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
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.
One of 56 Neurology Physician providers enrolled in Montana, 5 are shown here.
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 →
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 2024, Ann Collier, MD wrote 207 Medicare Part D claims totaling $70K in drug costs for 66 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.
How many Neurology Physician providers are there in the US? ▼
There are 20,467 Neurology Physician providers across 54 states in the US. The average Neurology Physician provider writes 1,356 Medicare Part D claims per year.
What drugs does Ann Collier, MD prescribe most often? ▼
Based on 2024 Medicare Part D data, Ann Collier, MD's most frequently prescribed drugs include Lamotrigine, Levetiracetam, Clobazam. 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 207 Part D claims and 66 Medicare beneficiaries in 2024. 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 (2024). 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 August 2026 (NPPES) / 2024 (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 August 2026.