Mark Ensio Baker II
- Industry payments
- $13
- Medical groups
- 2
- State license
- 1
- Year NPI issued
- 2018
- Practice address
- 1233 N 30th St, Billings, MT 59101
- Practice phone
- Call (406) 237-7000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
St Vincent Healthcare
Billings, Montana
Find Mark Baker'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.
Mark Ensio Baker II is a neonatologist in Billings, Montana
Mark Baker practices at St Vincent Healthcare in Billings, Montana.
Mark Baker's NPI, 1538665187, was assigned on April 3, 2018. Mark Baker holds Montana license 142250.
- NPI
- 1538665187NPI Registry (opens in a new tab)
- NPI enumeration date
- April 3, 2018
- NPI status
- Active
- Practice phone
- (406) 237-7000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Mark Ensio Baker II practices at St Vincent Healthcare in Billings, Montana
Mark Baker's primary practice is St Vincent Healthcare, at 1233 N 30th St, Billings, MT 59101 in Yellowstone County. The practice phone is (406) 237-7000.
- St Vincent Healthcare1233 N 30th St, Billings, MT 59101 · Yellowstone CountyPhone(406) 237-7000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Mark Ensio Baker II is affiliated with 1 site of care and 2 medical groups
Mark Baker's primary practice is St Vincent Healthcare in Billings, Montana. The medical group on file is SCL Health Medical Group. Dmand AI also links Mark Baker to 1 more medical group, named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Mark Ensio Baker II's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Mark Baker practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| St Vincent Healthcare | Available with a free account |
| +1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Mark Ensio Baker II is one of 15 neonatologists in Montana
Neonatal-perinatal medicine is Mark Baker's primary specialty in the NPI Registry, under taxonomy code 2080N0001X. Mark Baker is licensed in Montana.
Specialties and state licenses
- Neonatal-perinatal medicine, MontanaPrimary
Neonatologists near Mark Baker
Counts of neonatologists 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
Mark Ensio Baker II's patients have a median age of 1
Across all payers, Dmand AI patient panel data puts Mark Baker's median patient age at 1, with 67% women.
Mark Baker's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 1
Patient panel by sex, all payers
- Women67%
- Men33%
Source: Dmand AI Patient Panel Data
Mark Ensio Baker II received $13 in industry payments in 2025
CMS Open Payments shows 1 general payment to Mark Baker from 1 drug or device company in 2025. Food and beverage make up the largest share, 100% of the total. GlaxoSmithKline, LLC. paid the most, $13.
Companies that paid Mark Baker the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Mark Ensio Baker II'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Industry payments | Open Payments (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 Mark Ensio Baker II
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What is Mark Ensio Baker II's NPI number?
Mark Ensio Baker II's NPI number is 1538665187. It was assigned on April 3, 2018, and it is active in the NPI Registry.
What does Mark Ensio Baker II specialize in?
Mark Ensio Baker II is a neonatologist in Billings, Montana. The primary specialty in the NPI Registry is Neonatal-Perinatal Medicine Physician (taxonomy code 2080N0001X).
Where does Mark Ensio Baker II practice?
Mark Baker practices at 1233 N 30th St, Billings, MT 59101. Mark Baker's primary practice is St Vincent Healthcare in Billings, Montana. Dmand AI also links Mark Baker to 1 medical group.
What is Mark Ensio Baker II's office phone number?
The practice phone on file for Mark Baker is (406) 237-7000.
What is Mark Ensio Baker II's medical license number?
Mark Baker holds Montana license 142250.
What medical group is Mark Ensio Baker II part of?
Mark Baker is linked to SCL Health Medical Group. Dmand AI links Mark Baker to 1 more medical group.
Has Mark Ensio Baker II received payments from drug or device companies?
CMS Open Payments shows $13 in general payments to Mark Baker from 1 company from 2025 to 2025. The largest total came from GlaxoSmithKline, LLC.
How long has Mark Ensio Baker II been practicing?
Mark Baker's NPI was assigned in 2018.
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