NPI registry status
Active
2026 NPPES data Hospitalist Physician NPI 1689699589
Verify on CMS → Nathan Ker
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
229
Medicare Part D claims · 27 beneficiaries · Hospitalist Physician avg: 888
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Nathan Ker filed 229 Medicare Part D claims in 2023 as a Hospitalist Physician in Casper, Wyoming.
- 229
- Part D claims, 2023
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.
Nathan Ker's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
229 49th percentile higher than 49% 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-eligible specialty (heuristic, not verified)
Nathan Ker practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Nathan Ker?
Quality data not reportedPrimary specialty
Hospitalist Physician
Medicare Part D claims
229 74% 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).
Nathan Ker appears in the CMS NPPES registry as a Hospitalist Physician provider at 940 E 3RD ST STE 208, Casper, WY, 82601, with a listed phone of (307) 312-2726. NPI 1689699589 was issued on 07/12/2006.
Medicare Part D records for calendar year 2023 show 229 prescription claims written by this provider, covering 27 Medicare beneficiaries and totaling roughly $14K in drug spend, with an opioid prescribing rate of 4.8%.
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 | 1689699589 |
|---|---|
| Specialty | Hospitalist Physician |
| Gender | Male |
| NPI Issued | 07/12/2006 |
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
229
Total Claims
$14K
Total Drug Cost
27
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 519
- Total Day Supply
- 14,758
- Generic Drug Cost
- $6K
- Opioid Claims
- 11 (4.8% rate)
- Antibiotic Claims
- 21
Patient Demographics
- Average Patient Age
- 72.4 years
- Avg HCC Risk Score
- 0.85
- Gender Split
- 56% female / 44% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
| Drug | Claims |
|---|---|
| Amlodipine Besylate | 14 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Hospitalist Physician Overview
How Nathan Ker fits within the Hospitalist Physician landscape nationally.
16,825
Hospitalist Physician Providers in US
54
States with Hospitalist Physician
888
Avg Claims per Provider
Nathan Ker's 229 claims are below 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 Ker.
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.
Healthcare Guides
Learn more about finding, verifying, and understanding healthcare providers.
How to Find a Doctor
Step-by-step guide to choosing a provider
Verify Credentials
Check NPI, board certification & license status
Medical Specialties Explained
Who treats what and how specialties differ
Understanding Medicare Claims Data
What prescribing data reveals about a provider
In-Network vs Out-of-Network
How insurance networks affect your costs
Telehealth Guide
Virtual care options and coverage in 2026
Explore Wyoming
Frequently Asked Questions
What is Nathan Ker's specialty? ▼
Nathan Ker specializes in Hospitalist Physician and practices in Casper, Wyoming.
How much does Nathan Ker prescribe under Medicare Part D? ▼
In 2023, Nathan Ker wrote 229 Medicare Part D claims totaling $14K in drug costs for 27 beneficiaries.
Where is Nathan Ker located? ▼
Nathan Ker is located at 940 E 3RD ST STE 208, Casper, WY, 82601. Phone: (307) 312-2726.
What is Nathan Ker's NPI number? ▼
Nathan Ker's National Provider Identifier (NPI) is 1689699589, issued on 07/12/2006.
Does Nathan Ker prescribe opioids? ▼
Yes, Nathan Ker had 11 opioid claims in 2023 with an opioid prescribing rate of 4.8%.
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 Nathan Ker prescribe most often? ▼
Based on 2023 Medicare Part D data, Nathan Ker's most frequently prescribed drugs include Amlodipine Besylate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Nathan Ker accept Medicare? ▼
Nathan Ker appears in CMS Medicare data with 229 Part D claims and 27 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Nathan Ker's credentials? ▼
Nathan Ker's NPI is 1689699589. 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.