Dr. William Haley Fiske, MD
- Medicare services, 2024
- 241
- Medicare patients, 2024
- 193
- Part D claims, 2024
- 517
- Publications
- 1
- Hospital affiliations
- 1
- Practice address
- 1211 Medical Center Drive, Nashville, TN 37232
- Practice phone
- Call (615) 322-3454
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Fiske's professional email, personal email and mobile number
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Dr. William Haley Fiske is a gastroenterologist in Nashville, Tennessee
Dr. Fiske practices at Vanderbilt University Medical Center in Nashville, Tennessee, part of Vanderbilt University Medical Center.
Dr. Fiske's NPI, 1871634295, was assigned on February 9, 2007. Dr. Fiske graduated from Vanderbilt University School of Medicine in 2003. Dr. Fiske holds Tennessee license 45027.
- NPI
- 1871634295NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6305990052
- NPI enumeration date
- February 9, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (615) 322-3454
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 49
- Medical school graduation
- 2003
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. William Haley Fiske practices at Vanderbilt University Medical Center in Nashville, Tennessee
Dr. Fiske's primary practice is Vanderbilt University Medical Center, at 1211 Medical Center Drive, Nashville, TN 37232 in Davidson County. The practice phone is (615) 322-3454.
- Vanderbilt University Medical Center1211 Medical Center Drive, Nashville, TN 37232 · Davidson CountyPhone(615) 322-3454
Source: Dmand AI Affiliation Data
Dr. William Haley Fiske is affiliated with 2 sites of care and 1 medical group
Dr. Fiske's primary practice is Vanderbilt University Medical Center in Nashville, Tennessee, part of Vanderbilt University Medical Center. The medical group on file is Vanderbilt University Medical Center. Dmand AI also links Dr. Fiske to 1 more group practice or clinic, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. William Haley Fiske's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Fiske practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Vanderbilt University Medical Center | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. William Haley Fiske is one of 331 gastroenterologists in Tennessee
Gastroenterology is Dr. Fiske's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dr. Fiske is licensed in Tennessee.
Specialties and state licenses
- Gastroenterology, TennesseePrimary
Gastroenterologists near Dr. Fiske
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. William Haley Fiske billed Medicare for 241 services in 2024
CMS data shows 241 Medicare services from Dr. Fiske across 6 procedure codes in 2024, for 193 Medicare patients. Medicare paid $25,560 for them.
Dr. Fiske's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Surgery
- 2023: 1172024: 17852%
- Office and hospital visits
- 2023: 642024: 632%
Where Dr. Fiske's Medicare services took place, 2024
- In an office8435%
- In a facility15765%
Dr. Fiske compared with the Tennessee median for gastroenterologists, 2024
- Dr. Fiske
- Tennessee median
- Medicare services
- 241vs 64563% below
- Medicare patients
- 193vs 37749% below
- Part D claims
- 388vs 59635% below
Medians across 330 gastroenterologists in Tennessee with Dmand AI profiles that report each measure.
Dr. Fiske's most billed Medicare procedure codes, 2024
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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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. William Haley Fiske treated 193 Medicare patients in 2024, average age 71
CMS counts 193 Medicare patients who saw Dr. Fiske in 2024. The largest group is 65 to 74, with 108 patients. 69% of them have high cholesterol, and 68% have high blood pressure. Their average risk score is 1.27, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Fiske's median patient age at 65, with 54% women.
Dr. Fiske's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Fiske's Medicare patients by sex, 2024
- Women10554%
- Men8846%
Chronic conditions among Dr. Fiske's Medicare patients, 2024
- High cholesterol69%
- High blood pressure68%
- Arthritis46%
- Ischemic heart disease29%
- Mood disorders26%
- Cancer25%
- Diabetes25%
- Anxiety24%
Share of Medicare patients with each condition. A patient can have several.
Dr. Fiske's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 65
Patient panel by sex, all payers
- Women54%
- Men45%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. William Haley Fiske wrote 517 Medicare Part D claims in 2024
In 2024, Dr. Fiske wrote 517 Medicare Part D claims for 240 patients. 83% of them were for generic drugs. CMS names the drug for 388 of them, across 14 drugs with 11 or more claims each, at $190,907 in total drug cost. In 2023, CMS named 390 claims across 16 drugs.
Dr. Fiske's Part D claims by kind of drug, 2024
- Generic427 claims83%
- Brand-name90 claims17%
Dr. Fiske'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. Fiske's Part D claims, 2024
- Antibiotics4%20 of 517 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 3902024: 3881%
Drugs named by CMS: 14 in 2024, 16 in 2023.
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
Dr. William Haley Fiske ranks in the 73rd percentile for colonoscopy in Medicare
Dr. Fiske accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Fiske as offering telehealth. CMS counts 76 procedures of colonoscopy by Dr. Fiske, more than 73% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Where Dr. Fiske ranks in Medicare procedure volume
- Colonoscopy
- 73rd percentile76 procedures
- Upper gastrointestinal (GI) endoscopy for acid reflux
- 65th percentile54 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. William Haley Fiske has 1 publication on record
Dmand AI links 1 paper to Dr. Fiske in 2010. Dr. Fiske's most frequent co-authors are Robert Coffey, MD, Christopher D. Lind, MD and Jarred Paul Tanksley, MD.
Dr. Fiske's most frequent co-authors
- Robert Coffey, MD1 shared paper
- Christopher D. Lind, MD1 shared paper
- Jarred Paul Tanksley, MD1 shared paper
Recent publications by Dr. Fiske
See who Dr. Fiske researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Fiske 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. William Haley Fiske received $12 in industry payments in 2016
CMS Open Payments shows 1 general payment to Dr. Fiske from 1 drug or device company in 2016. Education make up the largest share, 100% of the total. Sandoz Inc. paid the most, $12.
Companies that paid Dr. Fiske the most, 2016 to 2016
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. William Haley Fiske graduated from Vanderbilt University School of Medicine
Dr. Fiske graduated from Vanderbilt University School of Medicine in 2003.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. William Haley Fiske'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 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 DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| 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) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (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 |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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. William Haley Fiske
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. William Haley Fiske's NPI number?
Dr. William Haley Fiske's NPI number is 1871634295. It was assigned on February 9, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. William Haley Fiske?
Dr. William Haley Fiske is a gastroenterologist in Nashville, Tennessee. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).
Where does Dr. William Haley Fiske practice?
Dr. Fiske practices at 1211 Medical Center Drive, Nashville, TN 37232. Dr. Fiske's primary practice is Vanderbilt University Medical Center in Nashville, Tennessee, part of Vanderbilt University Medical Center. Dmand AI also links Dr. Fiske to 1 group practice or clinic.
What is Dr. William Haley Fiske's office phone number?
The practice phone on file for Dr. Fiske is (615) 322-3454.
What is Dr. William Haley Fiske's medical license number?
Dr. Fiske holds Tennessee license 45027.
Which hospitals is Dr. William Haley Fiske affiliated with?
Dr. Fiske practices at Vanderbilt University Medical Center in Nashville, Tennessee.
What medical group is Dr. William Haley Fiske part of?
Dr. Fiske is linked to Vanderbilt University Medical Center.
Does Dr. William Haley Fiske accept Medicare?
Yes. CMS data shows Dr. Fiske billed Medicare for 241 services in 2024, and Dr. Fiske accepts Medicare assignment.
Does Dr. William Haley Fiske offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Fiske as offering telehealth services.
How many Medicare patients does Dr. William Haley Fiske see?
CMS counts 193 Medicare patients who saw Dr. Fiske in 2024, with an average age of 71.
Show 7 more questionsShow fewer questions
What services does Dr. William Haley Fiske bill to Medicare?
In 2024, Dr. Fiske's most billed Medicare services were surgery: digestive system (45385), surgery: digestive system (45380) and surgery: digestive system (43239).
Where did Dr. William Haley Fiske go to medical school?
Dr. Fiske graduated from Vanderbilt University School of Medicine in 2003.
What drugs does Dr. William Haley Fiske prescribe most?
In 2024 Medicare Part D data, Dr. Fiske's most prescribed drugs by claims were Gavilyte-G, Omeprazole and Peg-3350 And Electrolytes.
Has Dr. William Haley Fiske received payments from drug or device companies?
CMS Open Payments shows $12 in general payments to Dr. Fiske from 1 company from 2016 to 2016. The largest total came from Sandoz Inc.
How long has Dr. William Haley Fiske been practicing?
Dr. Fiske graduated from medical school in 2003, 23 years ago.
Does Dr. William Haley Fiske do research?
Dmand AI links 1 publication to Dr. Fiske.
Who does Dr. William Haley Fiske publish with?
Dr. Fiske's most frequent co-authors are Robert Coffey, MD (1 shared paper), Christopher D. Lind, MD (1 shared paper) and Jarred Paul Tanksley, MD (1 shared paper).
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