Anesthesia Recovery PeriodAnesthetics, IntravenousAnesthetists
Dr. Fred M. Drennan, MD
NPI1811916489
- Medicare services, 2022
- 11
- Part D claims, 2022
- 71
- Publications
- 6
- Affiliated sites
- 1
- Medical group
- 1
- Practice address
- 1100 9th Ave, Seattle, WA 98101-2756
- Practice phone
- Call (206) 223-6600
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Seattle Extracorporeal
Multi-specialty group site · Seattle, Washington
Find Dr. Drennan's professional email, personal email and mobile number
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Dr. Fred M. Drennan is a gastroenterologist in Seattle, Washington
Dr. Drennan practices at Seattle Extracorporeal in Seattle, Washington.
Dr. Drennan's NPI, 1811916489, was assigned on July 18, 2006. Dr. Drennan graduated from Yale School of Medicine in 1982. Dr. Drennan's Washington license number on file is MD00022840.
NPI and contact details
- NPI
- 1811916489NPI Registry (opens in a new tab)
- NPI enumeration date
- July 18, 2006
- NPI status
- Active
- Practice phone
- (206) 223-6600
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 70
- Medical school graduation
- 1982
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Fred M. Drennan practices at Seattle Extracorporeal in Seattle, Washington
Dr. Drennan's primary practice is Seattle Extracorporeal, at 1100 9th Ave, Seattle, WA 98101-2756. The practice phone is (206) 223-6600.
- Seattle Extracorporeal1100 9th Ave, Seattle, WA 98101-2756Phone(206) 223-6600
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Fred M. Drennan is affiliated with 1 site of care and 1 medical group
Dr. Drennan's primary practice is Seattle Extracorporeal in Seattle, Washington. Dmand AI also links Dr. Drennan to 1 medical group, named with a free account.
Seattle ExtracorporealPrimary
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dmand AI tracks the EHR system at Dr. Fred M. Drennan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Drennan practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Seattle Extracorporeal | Available with a free account |
| +1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Fred M. Drennan is one of 434 gastroenterologists in Washington
Gastroenterology is Dr. Drennan's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dr. Drennan is board certified in gastroenterology by the American Board of Internal Medicine. Dr. Drennan has a license on file in Washington.
Specialties and state licenses
- Gastroenterology, WashingtonPrimary
Gastroenterologists near Dr. Drennan
Counts of gastroenterologists 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. Fred M. Drennan billed Medicare for 11 services in 2022
CMS data shows 11 Medicare services from Dr. Drennan across 1 procedure code in 2022. Medicare paid $1,365 for them. Every service was in a facility, such as a hospital, rather than an office.
Medicare services, 202211
Paid by Medicare$1,365
Procedure codes1
Dr. Drennan's Medicare services by type, 2021 to 2022
- 2021
- 2022
- Surgery
- 2021: 972022: 1189%
- Lab and pathology
- 2021: 492022: 0100%
- Tests and treatments
- 2021: 172022: 0100%
- Other services
- 2021: 812022: 0100%
- Office and hospital visits
- 2021: 422022: 0100%
Dr. Drennan compared with the Washington median for gastroenterologists, 2022
- Dr. Drennan
- Washington median
- Medicare services
- 11vs 35697% below
- Part D claims
- 71vs 27274% below
Medians across 433 gastroenterologists in Washington with Dmand AI profiles that report each measure.
Dr. Drennan's most billed Medicare procedure codes, 2022
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Drennan and other gastroenterologists in Washington.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Fred M. Drennan's patients have a median age of 47
Across all payers, Dmand AI patient panel data puts Dr. Drennan's median patient age at 47, with 0% women.
Dr. Drennan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 47
Patient panel by sex, all payers
- Women0%
- Men100%
Source: Dmand AI Patient Panel Data
Dr. Fred M. Drennan wrote 71 Medicare Part D claims in 2022
In 2022, Dr. Drennan wrote 71 Medicare Part D claims. They cover 4 drugs, with $727 in total drug cost. In 2021, CMS named 516 claims across 12 drugs.
Part D claims, 202271
Drugs named by CMS4
Total drug cost$727
Dr. Drennan's most prescribed drugs by claims, 2022
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2021 to 2022
- 2021
- 2022
- Claims for drugs CMS names
- 2021: 5162022: 7186%
Drugs named by CMS: 4 in 2022, 12 in 2021.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. Fred M. Drennan has 6 publications on record
Dmand AI links 6 papers to Dr. Drennan, published from 2007 to 2019. The most frequent topics are Anesthesia Recovery Period, Anesthetics, Intravenous and Colonoscopy. Dr. Drennan's most frequent co-authors are Michael V. Chiorean, MD, Michael Gluck, MD and Johannes Koch, MD.
Papers6
Years published2007 to 2019
Dr. Drennan's papers by year, 2007 to 2019
Topics Dr. Drennan writes about most
- Anesthesia Recovery Period
- Anesthetics, Intravenous
- Colonoscopy
- Conscious Sedation
- Drug Therapy, Computer-Assisted
- Propofol
Dr. Drennan's most frequent co-authors
- Michael V. Chiorean, MD2 shared papers
- Michael Gluck, MD2 shared papers
- Johannes Koch, MD2 shared papers
Recent publications by Dr. Drennan
Barrett EsophagusCapsule EndoscopyEsophagoscopy
Am J Gastroenterol
Blood TransfusionGastrointestinal HemorrhageGraft vs Host Disease
World J Gastroenterol
Anesthesia Recovery PeriodAnesthetics, IntravenousColonic Polyps
See who Dr. Drennan researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Drennan works with, so you can find a warm path to the right gastroenterologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Fred M. Drennan has 3 awards and honors on record
Dmand AI lists 3 awards for Dr. Drennan, most recently Regional Top Doctor in 2014.
Awards and honors for Dr. Drennan
- 2014
- Regional Top Doctor
- 2013
- Super Doc
- Undated
- CMS Stage 1 EHR
Source: Dmand AI Professional Profile Data
Dr. Fred M. Drennan graduated from Yale School of Medicine
Dr. Drennan graduated from Yale School of Medicine in 1982.
- Medical school
- Board certified in gastroenterology
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. Fred M. Drennan accepts plans from 2 insurance carriers
Dr. Drennan is in network with 2 carriers, including United Healthcare and AK State Medicaid. HMO plans come from the most carriers, 1. Check the plan with the practice before a visit.
- United Healthcare
- AK State Medicaid
Plan types Dr. Drennan accepts, by number of carriers
- HMO1
- Medicaid1
- Medicare1
- POS1
- PPO1
Source: Dmand AI Insurance Network Data
Sources for Dr. Fred M. Drennan'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 DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| 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) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Awards and committee roles | Dmand AI Professional Profile Data |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network 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. Fred M. Drennan
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. Fred M. Drennan's NPI number?
Dr. Fred M. Drennan's NPI number is 1811916489. It was assigned on July 18, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Fred M. Drennan?
Dr. Fred M. Drennan is a gastroenterologist in Seattle, Washington. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).
Where does Dr. Fred M. Drennan practice?
Dr. Drennan practices at 1100 9th Ave, Seattle, WA 98101-2756. Dr. Drennan's primary practice is Seattle Extracorporeal in Seattle, Washington. Dmand AI also links Dr. Drennan to 1 medical group.
What is Dr. Fred M. Drennan's office phone number?
The practice phone on file for Dr. Drennan is (206) 223-6600.
What is Dr. Fred M. Drennan's medical license number?
Dr. Drennan's Washington license number on file is MD00022840.
Does Dr. Fred M. Drennan accept Medicare?
Yes. CMS data shows Dr. Drennan billed Medicare for 11 services in 2022.
Is Dr. Fred M. Drennan board certified?
Yes. Dr. Drennan is board certified in gastroenterology by the American Board of Internal Medicine.
What services does Dr. Fred M. Drennan bill to Medicare?
In 2022, Dr. Drennan's most billed Medicare services were surgery: digestive system (45380).
Where did Dr. Fred M. Drennan go to medical school?
Dr. Drennan graduated from Yale School of Medicine in 1982.
What drugs does Dr. Fred M. Drennan prescribe most?
In 2022 Medicare Part D data, Dr. Drennan's most prescribed drugs by claims were Omeprazole, Ondansetron HCl and Peg-3350 And Electrolytes.
Show 4 more questionsShow fewer questions
How long has Dr. Fred M. Drennan been practicing?
Dr. Drennan graduated from medical school in 1982, 44 years ago.
Does Dr. Fred M. Drennan do research?
Dmand AI links 6 publications to Dr. Drennan, published from 2007 to 2019.
Who does Dr. Fred M. Drennan publish with?
Dr. Drennan's most frequent co-authors are Michael V. Chiorean, MD (2 shared papers), Michael Gluck, MD (2 shared papers) and Johannes Koch, MD (2 shared papers).
What insurance does Dr. Fred M. Drennan accept?
Dr. Drennan is in network with 2 carriers, including United Healthcare and AK State Medicaid. HMO plans come from the most carriers, 1. Check the plan with the practice before a visit.
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