NPI registry status
Active
2026 NPPES data Hospitalist Physician NPI 1487004511 M.D.
Verify on CMS → James McLennan, M.D.
Hospitalist Physician in Casper, Wyoming.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 16,825 in Hospitalist 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 · 192 beneficiaries · Hospitalist Physician avg: 888
Generic prescribing
82%
generic claims · 17% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$2.7K
111 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
James McLennan, M.D. filed 2,405 Medicare Part D claims in 2023 as a Hospitalist Physician in Casper, Wyoming, prescribing 82% generic.
- 2K
- Part D claims, 2023
- 82%
- 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.
James McLennan, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
2,405 Top 14% higher than 86% 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)
James McLennan, M.D. 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 James McLennan, M.D.?
Quality data not reportedPrimary specialty
Hospitalist Physician
Medicare Part D claims
2,405 171% vs specialty avg
Specialty distribution in Wyoming
How Hospitalist Physician compares to other specialties among Wyoming 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 Hospitalist 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).
James McLennan, M.D. appears in the CMS NPPES registry as a Hospitalist Physician provider holding M.D. credentials at 1522 E A ST, Casper, WY, 82601, with a listed phone of (307) 234-6161. NPI 1487004511 was issued on 06/20/2016.
Medicare Part D records for calendar year 2023 show 2,405 prescription claims written by this provider, covering 192 Medicare beneficiaries and totaling roughly $387K in drug spend, split 17% brand-name and 82% generic by claim count.
Hospitalist Physician is a mid-sized specialty nationwide, with 16,825 enrolled providers across 54 states and an average of 888 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 | 1487004511 |
|---|---|
| Specialty | Hospitalist Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 06/20/2016 |
Hospital and facility affiliations
Facilities where James McLennan, 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.
Mt Grant General Hospital
Hawthorne, NV
South Lyon Health Center Inc
Yerington, NV
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 James McLennan, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$2.7K
Largest payer
AstraZeneca Pharmaceuticals LP
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 · Typical
James McLennan, M.D. - brand share 17.0%
Hospitalist Physician average
17% brand-name claims vs 82% generic, on 2,405 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.
2,405
Total Claims
$387K
Total Drug Cost
192
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 5,428
- Total Day Supply
- 158,665
- Brand vs Generic
- 17% brand / 82% generic
- Brand Drug Cost
- $335K
- Generic Drug Cost
- $51K
- Antibiotic Claims
- 63
Patient Demographics
- Average Patient Age
- 73.3 years
- Avg HCC Risk Score
- 0.89
- Gender Split
- 52% female / 48% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What James McLennan, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Rosuvastatin Calcium
Rosuvastatin Calcium
155 claims
- Levothyroxine Sodium
Levothyroxine Sodium
110 claims
- Metformin Hcl Er
Metformin Hcl Er
105 claims
- Atorvastatin Calcium
Atorvastatin Calcium
94 claims
- Amlodipine Besylate
Amlodipine Besylate
92 claims
- Lisinopril
Lisinopril
85 claims
- Losartan Potassium
Losartan Potassium
75 claims
- Telmisartan
Telmisartan
72 claims
| Drug | Claims |
|---|---|
| Rosuvastatin Calcium | 155 |
| Levothyroxine Sodium | 110 |
| Metformin Hcl Er Metformin Hcl | 105 |
| Atorvastatin Calcium | 94 |
| Amlodipine Besylate | 92 |
| Lisinopril | 85 |
| Losartan Potassium | 75 |
| Telmisartan | 72 |
| Metoprolol Succinate | 63 |
| Farxiga Dapagliflozin Propanediol | 56 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Hospitalist Physician Overview
How James McLennan, M.D. fits within the Hospitalist Physician landscape nationally.
16,825
Hospitalist Physician Providers in US
54
States with Hospitalist Physician
888
Avg Claims per Provider
James McLennan, M.D.'s 2,405 claims are above the specialty average of 888.
Nearby Hospitalist Physician Providers in Wyoming
Other clinicians with the same primary specialty enrolled in Wyoming, drawn from the same CMS NPPES roster as McLennan.
Dr. Aminata Aw
NP
Cheyenne, WY
Dr. Rachael Bracke
M.D.
Cody, WY
Dr. Deborah Brackett
MD
Cheyenne, WY
Dr. Connor Deal
M.D.
Cody, WY
Dr. Liron Gokovski
MD
Rock Springs, WY
Compare Hospitalist 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 Wyoming medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Hospitalist 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 James McLennan, M.D.'s specialty? ▼
James McLennan, M.D. specializes in Hospitalist Physician and practices in Casper, Wyoming. Credentials: M.D..
How much does James McLennan, M.D. prescribe under Medicare Part D? ▼
In 2023, James McLennan, M.D. wrote 2,405 Medicare Part D claims totaling $387K in drug costs for 192 beneficiaries.
Where is James McLennan, M.D. located? ▼
James McLennan, M.D. is located at 1522 E A ST, Casper, WY, 82601. Phone: (307) 234-6161.
What is James McLennan, M.D.'s NPI number? ▼
James McLennan, M.D.'s National Provider Identifier (NPI) is 1487004511, issued on 06/20/2016.
Does James McLennan, M.D. prescribe more brand-name or generic drugs? ▼
James McLennan, M.D.'s prescribing is 17% brand-name and 82% generic drugs by claim count, with $335K in brand drug costs.
How many Hospitalist Physician providers are there in the US? ▼
There are 16,825 Hospitalist Physician providers across 54 states in the US. The average Hospitalist Physician provider writes 888 Medicare Part D claims per year.
What drugs does James McLennan, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, James McLennan, M.D.'s most frequently prescribed drugs include Rosuvastatin Calcium, Levothyroxine Sodium, Metformin Hcl Er. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does James McLennan, M.D. accept Medicare? ▼
James McLennan, M.D. appears in CMS Medicare data with 2,405 Part D claims and 192 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify James McLennan, M.D.'s credentials? ▼
James McLennan, M.D.'s NPI is 1487004511 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
Compiled from official public sources by the PlainDoctor editorial team.