Nicholas Patrick Callahan, CRNA, MSN
- Medicare patients, 2024
- 86
- MIPS score, 2024
- 97
- Hospital affiliations
- 2
- Industry payments
- $169
- Medical groups
- 2
- Practice address
- 212 S Sullivan St, Fremont, MI 49412
- Practice phone
- Call (231) 924-3300
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Nicholas Callahan'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.
Nicholas Patrick Callahan is a nurse anesthetist in Fremont, Michigan
Nicholas Callahan practices at Corewell Health Gerber Hospital in Fremont, Michigan, part of Corewell Health.
Nicholas Callahan's NPI, 1750901757, was assigned on April 20, 2020. Nicholas Callahan holds Michigan license 4704303499NSA2006D.
- NPI
- 1750901757NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3971921347
- NPI enumeration date
- April 20, 2020
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (231) 924-3300
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 32
- Medical school graduation
- 2020
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Nicholas Patrick Callahan practices at Corewell Health Gerber Hospital in Fremont, Michigan
Nicholas Callahan's primary practice is Corewell Health Gerber Hospital, at 212 S Sullivan St, Fremont, MI 49412 in Newaygo County. The practice phone is (231) 924-3300.
- Corewell Health Gerber Hospital212 S Sullivan St, Fremont, MI 49412 · Newaygo CountyPhone(231) 924-3300
Source: Dmand AI Affiliation Data
Nicholas Patrick Callahan is affiliated with 2 sites of care and 2 medical groups
Nicholas Callahan's primary practice is Corewell Health Gerber Hospital in Fremont, Michigan, part of Corewell Health. Nicholas Callahan is also affiliated with Trinity Health Grand Rapids Hospital. The medical group on file is NorthStar Anesthesia. Dmand AI also links Nicholas Callahan to 1 more medical group, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Nicholas Patrick Callahan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Nicholas Callahan practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Corewell Health Gerber Hospital | Available with a free account |
| +1 more site and 1 medical group | 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 Corewell Health and 6.2K+ hospitals, with verified contacts in the same login.
Nicholas Patrick Callahan is one of 2,599 nurse anesthetists in Michigan
Nurse anesthetist, certified registered is Nicholas Callahan's primary specialty in the NPI Registry, under taxonomy code 367500000X. Nicholas Callahan is licensed in Michigan.
Specialties and state licenses
- Certified registered nurse anesthetist, MichiganPrimary
Nurse anesthetists near Nicholas Callahan
Counts of nurse anesthetists 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
Nicholas Patrick Callahan treated 86 Medicare patients in 2024, average age 68
CMS counts 86 Medicare patients who saw Nicholas Callahan in 2024. The largest group is 65 to 74, with 39 patients. 75% of them have high cholesterol, and 70% have high blood pressure. 36% are also on Medicaid. Their average risk score is 1.19, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Nicholas Callahan's median patient age at 58, with 47% women.
Nicholas Callahan's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Nicholas Callahan's Medicare patients by sex, 2024
- Women4653%
- Men4047%
Chronic conditions among Nicholas Callahan's Medicare patients, 2024
- High cholesterol75%
- High blood pressure70%
- Arthritis56%
- Diabetes30%
- Anxiety28%
- Mood disorders27%
- Ischemic heart disease26%
- COPD23%
Share of Medicare patients with each condition. A patient can have several.
Nicholas Callahan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 58
Patient panel by sex, all payers
- Women47%
- Men53%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Nicholas Patrick Callahan scored 97 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 97 out of 100 for Nicholas Callahan for performance year 2024, reported as part of a group. Nicholas Callahan accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Nicholas Callahan's MIPS scores, performance year 2024
- 97of 100Final score
- 95.7of 100Quality
- 40of 100Improvement Activities
- 75of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
Nicholas Patrick Callahan received $169 in industry payments in 2025
CMS Open Payments shows 1 general payment to Nicholas Callahan from 1 drug or device company in 2025. Travel and lodging make up the largest share, 100% of the total. Stryker Corporation paid the most, $169.
Companies that paid Nicholas Callahan 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 Nicholas Patrick Callahan'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) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| 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 Nicholas Patrick Callahan
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Nicholas Patrick Callahan's NPI number?
Nicholas Patrick Callahan's NPI number is 1750901757. It was assigned on April 20, 2020, and it is active in the NPI Registry.
What does Nicholas Patrick Callahan specialize in?
Nicholas Patrick Callahan is a nurse anesthetist in Fremont, Michigan. The primary specialty in the NPI Registry is Certified Registered Nurse Anesthetist (taxonomy code 367500000X).
Where does Nicholas Patrick Callahan practice?
Nicholas Callahan practices at 212 S Sullivan St, Fremont, MI 49412. Nicholas Callahan's primary practice is Corewell Health Gerber Hospital in Fremont, Michigan, part of Corewell Health. Dmand AI also links Nicholas Callahan to 1 medical group.
What is Nicholas Patrick Callahan's office phone number?
The practice phone on file for Nicholas Callahan is (231) 924-3300.
What is Nicholas Patrick Callahan's medical license number?
Nicholas Callahan holds Michigan license 4704303499NSA2006D.
Which hospitals is Nicholas Patrick Callahan affiliated with?
Nicholas Callahan practices at Corewell Health Gerber Hospital in Fremont, Michigan. Nicholas Callahan is also affiliated with Trinity Health Grand Rapids Hospital.
What medical group is Nicholas Patrick Callahan part of?
Nicholas Callahan is linked to NorthStar Anesthesia. Dmand AI links Nicholas Callahan to 1 more medical group.
Does Nicholas Patrick Callahan accept Medicare?
Yes. CMS lists Nicholas Callahan as accepting Medicare assignment.
What is Nicholas Patrick Callahan's MIPS score?
Nicholas Callahan's MIPS final score for performance year 2024 is 97 out of 100, reported as part of a group.
How many Medicare patients does Nicholas Patrick Callahan see?
CMS counts 86 Medicare patients who saw Nicholas Callahan in 2024, with an average age of 68.
Has Nicholas Patrick Callahan received payments from drug or device companies?
CMS Open Payments shows $169 in general payments to Nicholas Callahan from 1 company from 2025 to 2025. The largest total came from Stryker Corporation.
How long has Nicholas Patrick Callahan been practicing?
Nicholas Callahan graduated from medical school in 2020, 6 years ago.
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