Arthur Trapp Chalmers, MPH, PA-C
- Medicare services, 2024
- 444
- Medicare patients, 2024
- 109
- Part D claims, 2024
- 264
- Hospital affiliations
- 1
- Medical group
- 1
- Practice address
- 1325 Cottonwood Street, Woodland, CA 95695
- Practice phone
- Call (530) 662-3961
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Arthur Chalmers' professional email, personal email and mobile number
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Arthur Trapp Chalmers is a physician assistant in Woodland, California
Arthur Chalmers practices at Dignity Health - Woodland Memorial Hospital in Woodland, California, part of CommonSpirit Health.
Arthur Chalmers' NPI, 1013465715, was assigned on September 12, 2016. Arthur Chalmers holds California license PA53717.
- NPI
- 1013465715NPI Registry (opens in a new tab)
- NPI enumeration date
- September 12, 2016
- NPI status
- Active
- Practice phone
- (530) 662-3961
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 36
- Medical school graduation
- 2016
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Arthur Trapp Chalmers practices at Dignity Health - Woodland Memorial Hospital in Woodland, California
Arthur Chalmers' primary practice is Dignity Health - Woodland Memorial Hospital, at 1325 Cottonwood Street, Woodland, CA 95695 in Yolo County. The practice phone is (530) 662-3961.
- Dignity Health - Woodland Memorial Hospital1325 Cottonwood Street, Woodland, CA 95695 · Yolo CountyPhone(530) 662-3961
Source: Dmand AI Affiliation Data
Arthur Trapp Chalmers is affiliated with 1 site of care and 1 medical group
Arthur Chalmers' primary practice is Dignity Health - Woodland Memorial Hospital in Woodland, California, part of CommonSpirit Health. The medical group on file is CEP America.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Arthur Trapp Chalmers' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Arthur Chalmers practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Dignity Health - Woodland Memorial Hospital | Available with a free account |
Source: Dmand AI Technology Install Data
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Arthur Trapp Chalmers is one of 11,482 physician assistants in California
Physician assistant is Arthur Chalmers' primary specialty in the NPI Registry, under taxonomy code 363A00000X. Arthur Chalmers is licensed in California.
Specialties and state licenses
- Physician assistant, CaliforniaPrimary
Physician assistants near Arthur Chalmers
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
Arthur Trapp Chalmers billed Medicare for 444 services in 2024
CMS data shows 444 Medicare services from Arthur Chalmers across 3 procedure codes in 2024, for 109 Medicare patients. Medicare paid $37,881 for them. Every service was in a facility, such as a hospital, rather than an office.
Arthur Chalmers compared with the California median for physician assistants, 2024
- Arthur Chalmers
- California median
- Medicare services
- 444vs 2042.2 times
- Medicare patients
- 109vs 105Close to median
- Part D claims
- 48vs 24380% below
Medians across 7,065 physician assistants in California with Dmand AI profiles that report each measure.
Arthur Chalmers' most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Arthur Trapp Chalmers treated 109 Medicare patients in 2024, average age 55
CMS counts 109 Medicare patients who saw Arthur Chalmers in 2024. The largest group is under 65, with 71 patients. 75% of them have anxiety, and 75% have mood disorders. 88% are also on Medicaid. Their average risk score is 1.54, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Arthur Chalmers' median patient age at 43, with 58% women.
Arthur Chalmers' Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Arthur Chalmers' Medicare patients by sex, 2024
- Women6661%
- Men4339%
Chronic conditions among Arthur Chalmers' Medicare patients, 2024
- Anxiety75%
- Mood disorders75%
- Schizophrenia and other psychoses75%
- Depression72%
- High blood pressure68%
- Bipolar disorder58%
- Tobacco use54%
- High cholesterol51%
Share of Medicare patients with each condition. A patient can have several.
Arthur Chalmers' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 43
Patient panel by sex, all payers
- Women58%
- Men42%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Arthur Trapp Chalmers wrote 264 Medicare Part D claims in 2024
In 2024, Arthur Chalmers wrote 264 Medicare Part D claims for 65 patients. 92% of them were for generic drugs. CMS names the drug for 48 of them, across 3 drugs with 11 or more claims each, at $862 in total drug cost.
Arthur Chalmers' Part D claims by kind of drug, 2024
- Generic244 claims92%
- Brand-name20 claims8%
Arthur Chalmers' most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Arthur Chalmers' Part D claims, 2024
- Antipsychotics, patients 65 and over6%15 of 264 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
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Sources for Arthur Trapp Chalmers'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 services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| 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 and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (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 Arthur Trapp Chalmers
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Arthur Trapp Chalmers' NPI number?
Arthur Trapp Chalmers' NPI number is 1013465715. It was assigned on September 12, 2016, and it is active in the NPI Registry.
What does Arthur Trapp Chalmers specialize in?
Arthur Trapp Chalmers is a physician assistant in Woodland, California. The primary specialty in the NPI Registry is Physician Assistant (taxonomy code 363A00000X).
Where does Arthur Trapp Chalmers practice?
Arthur Chalmers practices at 1325 Cottonwood Street, Woodland, CA 95695. Arthur Chalmers' primary practice is Dignity Health - Woodland Memorial Hospital in Woodland, California, part of CommonSpirit Health.
What is Arthur Trapp Chalmers' office phone number?
The practice phone on file for Arthur Chalmers is (530) 662-3961.
What is Arthur Trapp Chalmers' medical license number?
Arthur Chalmers holds California license PA53717.
Which hospitals is Arthur Trapp Chalmers affiliated with?
Arthur Chalmers practices at Dignity Health - Woodland Memorial Hospital in Woodland, California.
What medical group is Arthur Trapp Chalmers part of?
Arthur Chalmers is linked to CEP America.
Does Arthur Trapp Chalmers accept Medicare?
Yes. CMS data shows Arthur Chalmers billed Medicare for 444 services in 2024.
How many Medicare patients does Arthur Trapp Chalmers see?
CMS counts 109 Medicare patients who saw Arthur Chalmers in 2024, with an average age of 55.
What services does Arthur Trapp Chalmers bill to Medicare?
In 2024, Arthur Chalmers' most billed Medicare services were hospital inpatient care (99233), hospital inpatient care (99223) and hospital inpatient care (99239).
What drugs does Arthur Trapp Chalmers prescribe most?
In 2024 Medicare Part D data, Arthur Chalmers' most prescribed drugs by claims were Olanzapine, Quetiapine Fumarate and Atorvastatin Calcium.
How long has Arthur Trapp Chalmers been practicing?
Arthur Chalmers graduated from medical school in 2016, 10 years ago.
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