Dr. Krista Nicole Grennan, MD
- Part D claims, 2024
- 223
- Publications
- 3
- Hospital affiliations
- 1
- State license
- 1
- Year NPI issued
- 2023
- Practice address
- 4500 San Pablo Rd, Jacksonville, FL 32224
- Practice phone
- Call (904) 953-2000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Grennan'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.
Dr. Krista Nicole Grennan is an internist in Jacksonville, Florida
Dr. Grennan practices at Mayo Clinic Hospital in Jacksonville, Florida, part of Mayo Clinic.
Dr. Grennan's NPI, 1093418428, was assigned on March 24, 2023. Dr. Grennan graduated from University of Central Florida College of Medicine in 2023. Dr. Grennan holds Florida license TRN37323.
- NPI
- 1093418428NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4385003649
- NPI enumeration date
- March 24, 2023
- NPI status
- Active
- Practice phone
- (904) 953-2000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Medical school graduation
- 2023
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Krista Nicole Grennan practices at Mayo Clinic Hospital in Jacksonville, Florida
Dr. Grennan's primary practice is Mayo Clinic Hospital, at 4500 San Pablo Rd, Jacksonville, FL 32224 in Duval County. The practice phone is (904) 953-2000.
- Mayo Clinic Hospital4500 San Pablo Rd, Jacksonville, FL 32224 · Duval CountyPhone(904) 953-2000
Source: Dmand AI Affiliation Data
Dr. Krista Nicole Grennan is affiliated with 1 site of care
Dr. Grennan's primary practice is Mayo Clinic Hospital in Jacksonville, Florida, part of Mayo Clinic.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Krista Nicole Grennan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Grennan practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Mayo Clinic Hospital | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Krista Nicole Grennan is one of 9,009 internists in Florida
Internal medicine is Dr. Grennan's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Grennan is licensed in Florida.
Specialties and state licenses
- Internal medicine, FloridaPrimary
Internists near Dr. Grennan
Counts of internists 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
Dr. Krista Nicole Grennan's patients have a median age of 63
Across all payers, Dmand AI patient panel data puts Dr. Grennan's median patient age at 63, with 59% women.
Dr. Grennan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 63
Patient panel by sex, all payers
- Women59%
- Men41%
Source: Dmand AI Patient Panel Data
Dr. Krista Nicole Grennan wrote 223 Medicare Part D claims in 2024
In 2024, Dr. Grennan wrote 223 Medicare Part D claims for 48 patients. 70% of them were for generic drugs. CMS names the drug for 49 of them, across 4 drugs with 11 or more claims each, at $15,885 in total drug cost.
Dr. Grennan's Part D claims by kind of drug, 2024
- Generic156 claims70%
- Brand-name and other67 claims30%
Dr. Grennan's 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 Dr. Grennan's Part D claims, 2024
- Antibiotics8%18 of 223 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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Dr. Krista Nicole Grennan has 3 publications on record
Dmand AI links 3 papers to Dr. Grennan, published from 2022 to 2025. 2025 was the busiest year, with 2. Dr. Grennan has published most often in JCEM Case Rep. Dr. Grennan's most frequent co-authors are Courtney Elizabeth Borg, MD, Tyler Martin Janitz, DO and Ashley Marie Meneley, DO.
Dr. Grennan's most frequent co-authors
- Courtney Elizabeth Borg, MD1 shared paper
- Tyler Martin Janitz, DO1 shared paper
- Ashley Marie Meneley, DO1 shared paper
Recent publications by Dr. Grennan
See who Dr. Grennan researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Grennan works with, so you can find a warm path to the right internists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Krista Nicole Grennan graduated from University of Central Florida College of Medicine
Dr. Grennan graduated from University of Central Florida College of Medicine in 2023.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Krista Nicole Grennan'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 |
| 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) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| 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 Dr. Krista Nicole Grennan
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Krista Nicole Grennan's NPI number?
Dr. Krista Nicole Grennan's NPI number is 1093418428. It was assigned on March 24, 2023, and it is active in the NPI Registry.
What kind of doctor is Dr. Krista Nicole Grennan?
Dr. Krista Nicole Grennan is an internist in Jacksonville, Florida. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Krista Nicole Grennan practice?
Dr. Grennan practices at 4500 San Pablo Rd, Jacksonville, FL 32224. Dr. Grennan's primary practice is Mayo Clinic Hospital in Jacksonville, Florida, part of Mayo Clinic.
What is Dr. Krista Nicole Grennan's office phone number?
The practice phone on file for Dr. Grennan is (904) 953-2000.
What is Dr. Krista Nicole Grennan's medical license number?
Dr. Grennan holds Florida license TRN37323.
Which hospitals is Dr. Krista Nicole Grennan affiliated with?
Dr. Grennan practices at Mayo Clinic Hospital in Jacksonville, Florida.
Where did Dr. Krista Nicole Grennan go to medical school?
Dr. Grennan graduated from University of Central Florida College of Medicine in 2023.
What drugs does Dr. Krista Nicole Grennan prescribe most?
In 2024 Medicare Part D data, Dr. Grennan's most prescribed drugs by claims were Jardiance, Repatha Sureclick and Levothyroxine Sodium.
How long has Dr. Krista Nicole Grennan been practicing?
Dr. Grennan graduated from medical school in 2023, 3 years ago.
Does Dr. Krista Nicole Grennan do research?
Dmand AI links 3 publications to Dr. Grennan, published from 2022 to 2025.
Who does Dr. Krista Nicole Grennan publish with?
Dr. Grennan's most frequent co-authors are Courtney Elizabeth Borg, MD (1 shared paper), Tyler Martin Janitz, DO (1 shared paper) and Ashley Marie Meneley, DO (1 shared paper).
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