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Mark Charles O'Brien

  • Lewiston, ME
  • Nurse anesthetist
NPI1174243976PAC ID0547746109
Hospital affiliations
1
Medical groups
3
State license
1
Year NPI issued
2022
Practice address
300 Main Street, Lewiston, ME 04240
Practice phone
Call (207) 795-0111
Professional email
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Personal email
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Mobile number
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Social profiles

Primary practice

Central Maine Medical Center

Hospital · Lewiston, Maine

See all 4 affiliations

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Mark Charles O'Brien is a nurse anesthetist in Lewiston, Maine

Mark O'Brien practices at Central Maine Medical Center in Lewiston, Maine, part of Prime Healthcare Services.

Mark O'Brien's NPI, 1174243976, was assigned on August 31, 2022. Mark O'Brien holds Maine license RNA253086.

NPI and contact details
NPI
1174243976NPI Registry (opens in a new tab)
Medicare PAC ID
0547746109
NPI enumeration date
August 31, 2022
NPI status
Active
Accepts Medicare assignment
Yes
Practice phone
(207) 795-0111
Professional email
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Personal email
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Mobile number
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Sex
Male
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)

Mark Charles O'Brien practices at Central Maine Medical Center in Lewiston, Maine

Mark O'Brien's primary practice is Central Maine Medical Center, at 300 Main Street, Lewiston, ME 04240 in Androscoggin County. The practice phone is (207) 795-0111.

Source: Dmand AI Affiliation Data

Mark Charles O'Brien is affiliated with 1 site of care and 3 medical groups

Mark O'Brien's primary practice is Central Maine Medical Center in Lewiston, Maine, part of Prime Healthcare Services. The medical group on file is Central Maine Medical Center. Dmand AI also links Mark O'Brien to 2 more medical groups, each named with a free account. Mark O'Brien's employer is on file too: a hospital.

Central Maine Medical CenterPrimary care group, Lewiston, ME2 medical groupsNames with a free accountEmployer: hospitalName with a free account
See all 4 affiliations for Mark O'Brien

Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data

Dmand AI tracks the EHR system at Mark Charles O'Brien's practice

Dmand AI tracks the electronic health record (EHR) system at each site where Mark O'Brien practices. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
Central Maine Medical CenterAvailable with a free account
+2 medical groupsAvailable with a free account

Source: Dmand AI Technology Install Data

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Mark Charles O'Brien is one of 397 nurse anesthetists in Maine

Nurse anesthetist, certified registered is Mark O'Brien's primary specialty in the NPI Registry, under taxonomy code 367500000X. Mark O'Brien is licensed in Maine.

Specialties and state licenses

  • Certified registered nurse anesthetist, MainePrimaryLicense RNA253086 · taxonomy 367500000X

Nurse anesthetists near Mark O'Brien

Counts of nurse anesthetists with a Dmand AI profile, by place and practice. Each opens the list.

397nurse anesthetists in Maine30nurse anesthetists in Lewiston18nurse anesthetists at Central Maine Medical Center

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks

Mark Charles O'Brien's patients have a median age of 71

Across all payers, Dmand AI patient panel data puts Mark O'Brien's median patient age at 71, with 60% women.

Mark O'Brien's patients across all payers

Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.

Patient panel by age, all payers

Median age 71

Patient panel by sex, all payers

  • Women60%
  • Men37%

Source: Dmand AI Patient Panel Data

How Mark Charles O'Brien takes part in Medicare

Mark O'Brien 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 Mark Charles O'Brien's profile data

Sources for the data on this page
Data on this pageSource
NPI, name, sex, specialty and licensesNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data
Practice locations and phoneDmand AI Affiliation Data
Primary practice, affiliations and health systemDmand AI Affiliation DataDmand AI Org Hierarchy Data
Medicare patients and the all-payer patient panelDmand AI Patient Panel Data
MIPS scores, telehealth, assignment and procedure percentilesDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)
EHR at each practice siteDmand AI Technology Install Data
Similar physiciansDmand AI Affiliation Data

Data last refreshed October 2026Report an inaccuracyRemove my information

FAQ

Frequently asked questions about Mark Charles O'Brien

Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.

What is Mark Charles O'Brien's NPI number?

Mark Charles O'Brien's NPI number is 1174243976. It was assigned on August 31, 2022, and it is active in the NPI Registry.

What does Mark Charles O'Brien specialize in?

Mark Charles O'Brien is a nurse anesthetist in Lewiston, Maine. The primary specialty in the NPI Registry is Certified Registered Nurse Anesthetist (taxonomy code 367500000X).

Where does Mark Charles O'Brien practice?

Mark O'Brien practices at 300 Main Street, Lewiston, ME 04240. Mark O'Brien's primary practice is Central Maine Medical Center in Lewiston, Maine, part of Prime Healthcare Services. Dmand AI also links Mark O'Brien to 2 medical groups.

What is Mark Charles O'Brien's office phone number?

The practice phone on file for Mark O'Brien is (207) 795-0111.

What is Mark Charles O'Brien's medical license number?

Mark O'Brien holds Maine license RNA253086.

Which hospitals is Mark Charles O'Brien affiliated with?

Mark O'Brien practices at Central Maine Medical Center in Lewiston, Maine.

What medical group is Mark Charles O'Brien part of?

Mark O'Brien is linked to Central Maine Medical Center. Dmand AI links Mark O'Brien to 2 more medical groups.

Does Mark Charles O'Brien accept Medicare?

Yes. CMS lists Mark O'Brien as accepting Medicare assignment.

How long has Mark Charles O'Brien been practicing?

Mark O'Brien graduated from medical school in 2025, 1 years ago.

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