Nathaniel Welsh Best, PA-C
- Medicare patients, 2024
- 225
- Part D claims, 2024
- 164
- MIPS score, 2024
- 87
- Hospital affiliations
- 2
- Medical groups
- 5
- Practice address
- 300 1st Capitol Dr, Saint Charles, MO 63301
- Practice phone
- Call (636) 947-5000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find Nathaniel Best's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Nathaniel Welsh Best is a physician assistant in Saint Charles, Missouri
Nathaniel Best practices at SSM Health St. Joseph Hospital - St. Charles in Saint Charles, Missouri, part of SSM Health Care.
Nathaniel Best's NPI, 1467928408, was assigned on October 17, 2018. Nathaniel Best holds Missouri license 2020030531.
- NPI
- 1467928408NPI Registry (opens in a new tab)
- NPI enumeration date
- October 17, 2018
- NPI status
- Active
- Practice phone
- (636) 947-5000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 34
- Medical school graduation
- 2018
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Nathaniel Welsh Best practices at SSM Health St. Joseph Hospital - St. Charles in Saint Charles, Missouri
Nathaniel Best's primary practice is SSM Health St. Joseph Hospital - St. Charles, at 300 1st Capitol Dr, Saint Charles, MO 63301 in St. Charles County. The practice phone is (636) 947-5000.
- SSM Health St. Joseph Hospital - St. Charles300 1st Capitol Dr, Saint Charles, MO 63301 · St. Charles CountyPhone(636) 947-5000
Source: Dmand AI Affiliation Data
Nathaniel Welsh Best is affiliated with 2 sites of care and 5 medical groups
Nathaniel Best's primary practice is SSM Health St. Joseph Hospital - St. Charles in Saint Charles, Missouri, part of SSM Health Care. Nathaniel Best is also affiliated with Select Specialty Hospital - St. Louis. The medical group on file is CEP America. Dmand AI also links Nathaniel Best to 4 more medical groups, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Nathaniel Welsh Best's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Nathaniel Best practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| SSM Health St. Joseph Hospital - St. Charles | Available with a free account |
| +1 more site and 4 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Nathaniel Welsh Best is one of 1,484 physician assistants in Missouri
Physician assistant is Nathaniel Best's primary specialty in the NPI Registry, under taxonomy code 363A00000X. Dmand AI has Nathaniel Best's licenses on file in 3 states: Missouri, Iowa and Illinois.
Specialties and state licenses
- Physician assistant, MissouriPrimary
- Iowa license
- Illinois license
Physician assistants near Nathaniel Best
Counts of physician assistants with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Nathaniel Welsh Best treated 225 Medicare patients in 2024, average age 73
CMS counts 225 Medicare patients who saw Nathaniel Best in 2024. The largest group is 65 to 74, with 78 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 20% are also on Medicaid. Their average risk score is 1.79, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Nathaniel Best's median patient age at 68, with 59% women.
Nathaniel Best's Medicare patients by age, 2024
Nathaniel Best's Medicare patients by sex, 2024
- Women13158%
- Men9442%
Chronic conditions among Nathaniel Best's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis52%
- Chronic kidney disease46%
- Anxiety45%
- Diabetes44%
- Mood disorders44%
- Depression40%
Share of Medicare patients with each condition. A patient can have several.
Nathaniel Best's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 68
Patient panel by sex, all payers
- Women59%
- Men40%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Nathaniel Welsh Best wrote 164 Medicare Part D claims in 2024
In 2024, Nathaniel Best wrote 164 Medicare Part D claims for 125 patients. 95% of them were for generic drugs.
Nathaniel Best's Part D claims by kind of drug, 2024
- Generic156 claims95%
- Brand-name and other8 claims5%
Drug classes CMS tracks in Nathaniel Best's Part D claims, 2024
- Opioids13%22 of 164 claims
- Antibiotics38%63 of 164 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
Nathaniel Welsh Best scored 87 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 87 out of 100 for Nathaniel Best for performance year 2024, reported as part of a group.
Nathaniel Best's MIPS scores, performance year 2024
- 87of 100Final score
- 70.9of 100Quality
- 40of 100Improvement Activities
- 93of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Source: Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Sources for Nathaniel Welsh Best's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Nathaniel Welsh Best
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Nathaniel Welsh Best's NPI number?
Nathaniel Welsh Best's NPI number is 1467928408. It was assigned on October 17, 2018, and it is active in the NPI Registry.
What does Nathaniel Welsh Best specialize in?
Nathaniel Welsh Best is a physician assistant in Saint Charles, Missouri. The primary specialty in the NPI Registry is Physician Assistant (taxonomy code 363A00000X).
Where does Nathaniel Welsh Best practice?
Nathaniel Best practices at 300 1st Capitol Dr, Saint Charles, MO 63301. Nathaniel Best's primary practice is SSM Health St. Joseph Hospital - St. Charles in Saint Charles, Missouri, part of SSM Health Care. Dmand AI also links Nathaniel Best to 4 medical groups.
What is Nathaniel Welsh Best's office phone number?
The practice phone on file for Nathaniel Best is (636) 947-5000.
What is Nathaniel Welsh Best's medical license number?
Nathaniel Best holds Missouri license 2020030531, one of the licenses on file in 3 states.
Which states has Nathaniel Welsh Best been licensed in?
Dmand AI has state licenses on file for Nathaniel Best in Missouri, Iowa and Illinois.
Which hospitals is Nathaniel Welsh Best affiliated with?
Nathaniel Best practices at SSM Health St. Joseph Hospital - St. Charles in Saint Charles, Missouri. Nathaniel Best is also affiliated with Select Specialty Hospital - St. Louis.
What medical group is Nathaniel Welsh Best part of?
Nathaniel Best is linked to CEP America. Dmand AI links Nathaniel Best to 4 more medical groups.
What is Nathaniel Welsh Best's MIPS score?
Nathaniel Best's MIPS final score for performance year 2024 is 87 out of 100, reported as part of a group.
How many Medicare patients does Nathaniel Welsh Best see?
CMS counts 225 Medicare patients who saw Nathaniel Best in 2024, with an average age of 73.
How long has Nathaniel Welsh Best been practicing?
Nathaniel Best graduated from medical school in 2018, 8 years ago.
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