Marin T. Underhill
- Hospital affiliations
- 1
- Medical group
- 1
- State license
- 1
- Year NPI issued
- 2025
- Practice address
- 2800 10th Ave N, Billings, MT 59101
- Practice phone
- Call (406) 657-4000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Marin Underhill'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.
Marin T. Underhill is a physician assistant in Billings, Montana
Marin Underhill practices at Billings Clinic Hospital in Billings, Montana, part of Billings Clinic.
Marin Underhill's NPI, 1114897527, was assigned on November 10, 2025.
- NPI
- 1114897527NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9335625912
- NPI enumeration date
- November 10, 2025
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (406) 657-4000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 27
- Medical school graduation
- 2025
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Marin T. Underhill practices at Billings Clinic Hospital in Billings, Montana
Marin Underhill's primary practice is Billings Clinic Hospital, at 2800 10th Ave N, Billings, MT 59101 in Yellowstone County. The practice phone is (406) 657-4000.
- Billings Clinic Hospital2800 10th Ave N, Billings, MT 59101 · Yellowstone CountyPhone(406) 657-4000
Source: Dmand AI Affiliation Data
Marin T. Underhill is affiliated with 2 sites of care and 1 medical group
Marin Underhill's primary practice is Billings Clinic Hospital in Billings, Montana, part of Billings Clinic. The medical group on file is Billings Clinic. Dmand AI also links Marin Underhill to 1 more group practice or clinic, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Marin T. Underhill's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Marin Underhill practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Billings Clinic Hospital | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Billings Clinic and 6.2K+ hospitals, with verified contacts in the same login.
Marin T. Underhill is one of 656 physician assistants in Montana
Physician assistant is Marin Underhill's primary specialty in the NPI Registry, under taxonomy code 363A00000X. Marin Underhill has a license on file in Montana.
Specialties and state licenses
- Physician assistant, Montana
Physician assistants near Marin Underhill
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
Marin T. Underhill's patients have a median age of 49
Across all payers, Dmand AI patient panel data puts Marin Underhill's median patient age at 49, with 29% women.
Marin Underhill's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 49
Patient panel by sex, all payers
- Women29%
- Men71%
Source: Dmand AI Patient Panel Data
How Marin T. Underhill takes part in Medicare
Marin Underhill accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
Sources for Marin T. Underhill'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 Data |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (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 Marin T. Underhill
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Marin T. Underhill's NPI number?
Marin T. Underhill's NPI number is 1114897527. It was assigned on November 10, 2025, and it is active in the NPI Registry.
What does Marin T. Underhill specialize in?
Marin T. Underhill is a physician assistant in Billings, Montana. The primary specialty in the NPI Registry is Physician Assistant (taxonomy code 363A00000X).
Where does Marin T. Underhill practice?
Marin Underhill practices at 2800 10th Ave N, Billings, MT 59101. Marin Underhill's primary practice is Billings Clinic Hospital in Billings, Montana, part of Billings Clinic. Dmand AI also links Marin Underhill to 1 group practice or clinic.
What is Marin T. Underhill's office phone number?
The practice phone on file for Marin Underhill is (406) 657-4000.
Which hospitals is Marin T. Underhill affiliated with?
Marin Underhill practices at Billings Clinic Hospital in Billings, Montana.
What medical group is Marin T. Underhill part of?
Marin Underhill is linked to Billings Clinic.
Does Marin T. Underhill accept Medicare?
Yes. CMS lists Marin Underhill as accepting Medicare assignment.
How long has Marin T. Underhill been practicing?
Marin Underhill graduated from medical school in 2025, 1 years ago.
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