Dr. Benjamin F. Merrifield, MD
- Medicare services, 2024
- 121
- Medicare patients, 2024
- 100
- Part D claims, 2024
- 13
- Hospital affiliations
- 1
- Industry payments
- $6,086
- Practice address
- 413 Lilly Road NE, Olympia, WA 98506
- Practice phone
- Call (360) 493-7179
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Merrifield'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. Benjamin F. Merrifield is a gastroenterologist in Olympia, Washington
Dr. Merrifield practices at Providence St. Peter Hospital in Olympia, Washington, part of Providence Health & Services.
Dr. Merrifield's NPI, 1083695167, was assigned on November 7, 2005. Dr. Merrifield graduated from Clvlnd Clinic Lerner College of Med of Case Wstn Rsv University in 1998. Dr. Merrifield holds Washington license MD00044510.
- NPI
- 1083695167NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6901845999
- NPI enumeration date
- November 7, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (360) 493-7179
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 54
- Medical school graduation
- 1998
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Benjamin F. Merrifield practices at Providence St. Peter Hospital in Olympia, Washington
Dr. Merrifield's primary practice is Providence St. Peter Hospital, at 413 Lilly Road NE, Olympia, WA 98506 in Thurston County. The practice phone is (360) 493-7179.
- Providence St. Peter Hospital413 Lilly Road NE, Olympia, WA 98506 · Thurston CountyPhone(360) 493-7179
Source: Dmand AI Affiliation Data
Dr. Benjamin F. Merrifield is affiliated with 3 sites of care and 2 medical groups
Dr. Merrifield's primary practice is Providence St. Peter Hospital in Olympia, Washington, part of Providence Health & Services. The medical group on file is Puget Sound Gastroenterology. Dmand AI also links Dr. Merrifield to 1 more group practice or clinic, 1 ambulatory surgery center and 1 medical group, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Benjamin F. Merrifield's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Merrifield practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Providence St. Peter Hospital | Available with a free account |
| +2 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Benjamin F. Merrifield is one of 434 gastroenterologists in Washington
Gastroenterology is Dr. Merrifield's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dr. Merrifield is licensed in Washington.
Specialties and state licenses
- Gastroenterology, WashingtonPrimary
Gastroenterologists near Dr. Merrifield
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. Benjamin F. Merrifield billed Medicare for 121 services in 2024
CMS data shows 121 Medicare services from Dr. Merrifield across 7 procedure codes in 2024, for 100 Medicare patients. Medicare paid $13,150 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Merrifield's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Surgery
- 2023: 742024: 9326%
- Office and hospital visits
- 2023: 272024: 284%
Dr. Merrifield compared with the Washington median for gastroenterologists, 2024
- Dr. Merrifield
- Washington median
- Medicare services
- 121vs 35666% below
- Medicare patients
- 100vs 24459% below
- Part D claims
- 136vs 27250% below
Medians across 433 gastroenterologists in Washington with Dmand AI profiles that report each measure.
Dr. Merrifield'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.
Need commercial claims for Dr. Merrifield?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Merrifield and other gastroenterologists in Washington.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Benjamin F. Merrifield treated 100 Medicare patients in 2024, average age 74
CMS counts 100 Medicare patients who saw Dr. Merrifield in 2024. The largest group is 65 to 74, with 40 patients. 75% of them have high blood pressure, and 67% have high cholesterol. 14% are also on Medicaid. Their average risk score is 1.75, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Merrifield's median patient age at 69, with 50% women.
Dr. Merrifield's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Merrifield's Medicare patients by sex, 2024
- Women5757%
- Men4343%
Chronic conditions among Dr. Merrifield's Medicare patients, 2024
- High blood pressure75%
- High cholesterol67%
- Arthritis50%
- Heart failure41%
- Ischemic heart disease41%
- Depression39%
- Mood disorders39%
- Atrial fibrillation35%
Share of Medicare patients with each condition. A patient can have several.
Dr. Merrifield's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 69
Patient panel by sex, all payers
- Women50%
- Men50%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Benjamin F. Merrifield wrote 13 Medicare Part D claims in 2024
In 2024, Dr. Merrifield wrote 13 Medicare Part D claims. They cover 4 drugs, with $2,340 in total drug cost.
Dr. Merrifield's most prescribed drugs by claims, 2016
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
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
How Dr. Benjamin F. Merrifield takes part in Medicare
Dr. Merrifield accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Colonoscopy: 1 to 10 procedures (CMS shows small counts as a range)
Upper gastrointestinal (GI) endoscopy for acid reflux: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Benjamin F. Merrifield received $6,086 in industry payments from 2017 to 2024
CMS Open Payments shows 26 general payments to Dr. Merrifield from 6 drug and device companies from 2017 to 2024. Travel and lodging make up the largest share, 76% of the total. Steris Corporation paid the most, $4,271.
General payments to Dr. Merrifield by program year, 2017 to 2024
General payments to Dr. Merrifield by kind, 2017 to 2024
- Travel and lodging$4,62576%
- Food and beverage$1,37323%
- Education speaker fees$891%
Companies that paid Dr. Merrifield the most, 2017 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Benjamin F. Merrifield graduated from Clvlnd Clinic Lerner College of Med of Case Wstn Rsv University
Dr. Merrifield graduated from Clvlnd Clinic Lerner College of Med of Case Wstn Rsv University in 1998.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Benjamin F. Merrifield'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) |
| 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. Benjamin F. Merrifield
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. Benjamin F. Merrifield's NPI number?
Dr. Benjamin F. Merrifield's NPI number is 1083695167. It was assigned on November 7, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Benjamin F. Merrifield?
Dr. Benjamin F. Merrifield is a gastroenterologist in Olympia, Washington. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).
Where does Dr. Benjamin F. Merrifield practice?
Dr. Merrifield practices at 413 Lilly Road NE, Olympia, WA 98506. Dr. Merrifield's primary practice is Providence St. Peter Hospital in Olympia, Washington, part of Providence Health & Services. Dmand AI also links Dr. Merrifield to 1 group practice or clinic, 1 ambulatory surgery center and 1 medical group.
What is Dr. Benjamin F. Merrifield's office phone number?
The practice phone on file for Dr. Merrifield is (360) 493-7179.
What is Dr. Benjamin F. Merrifield's medical license number?
Dr. Merrifield holds Washington license MD00044510.
Which hospitals is Dr. Benjamin F. Merrifield affiliated with?
Dr. Merrifield practices at Providence St. Peter Hospital in Olympia, Washington.
What medical group is Dr. Benjamin F. Merrifield part of?
Dr. Merrifield is linked to Puget Sound Gastroenterology. Dmand AI links Dr. Merrifield to 1 more medical group.
Does Dr. Benjamin F. Merrifield accept Medicare?
Yes. CMS data shows Dr. Merrifield billed Medicare for 121 services in 2024, and Dr. Merrifield accepts Medicare assignment.
How many Medicare patients does Dr. Benjamin F. Merrifield see?
CMS counts 100 Medicare patients who saw Dr. Merrifield in 2024, with an average age of 74.
What services does Dr. Benjamin F. Merrifield bill to Medicare?
In 2024, Dr. Merrifield's most billed Medicare services were hospital inpatient care (99222), surgery: digestive system (43235) and surgery: digestive system (43239).
Show 4 more questionsShow fewer questions
Where did Dr. Benjamin F. Merrifield go to medical school?
Dr. Merrifield graduated from Clvlnd Clinic Lerner College of Med of Case Wstn Rsv University in 1998.
What drugs does Dr. Benjamin F. Merrifield prescribe most?
In 2016 Medicare Part D data, Dr. Merrifield's most prescribed drugs by claims were Gavilyte-C, Omeprazole and Peg 3350-Electrolyte.
Has Dr. Benjamin F. Merrifield received payments from drug or device companies?
CMS Open Payments shows $6,086 in general payments to Dr. Merrifield from 6 companies from 2017 to 2024. The largest total came from Steris Corporation.
How long has Dr. Benjamin F. Merrifield been practicing?
Dr. Merrifield graduated from medical school in 1998, 28 years ago.
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