Dr. John Thomas Hassapis, MD
- Medicare services, 2024
- 81
- Medicare patients, 2024
- 87
- Part D claims, 2024
- 62
- Hospital affiliations
- 1
- Medical groups
- 2
- Practice address
- 101 North Main Street, Coupeville, WA 98239
- Practice phone
- Call (360) 678-5151
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Hassapis' professional email, personal email and mobile number
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Dr. John Thomas Hassapis is a general surgeon in Coupeville, Washington
Dr. Hassapis practices at WhidbeyHealth Medical Center in Coupeville, Washington, part of WhidbeyHealth.
Dr. Hassapis' NPI, 1992709802, was assigned on June 8, 2005. Dr. Hassapis graduated from Loyola University of Chicago, Stritch School of Medicine in 1990. Dr. Hassapis holds Washington license MD60466656.
- NPI
- 1992709802NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6305917873
- NPI enumeration date
- June 8, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (360) 678-5151
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 62
- Medical school graduation
- 1990
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John Thomas Hassapis practices at WhidbeyHealth Medical Center in Coupeville, Washington
Dr. Hassapis' primary practice is WhidbeyHealth Medical Center, at 101 North Main Street, Coupeville, WA 98239 in Island County. The practice phone is (360) 678-5151.
- WhidbeyHealth Medical Center101 North Main Street, Coupeville, WA 98239 · Island CountyPhone(360) 678-5151
Source: Dmand AI Affiliation Data
Dr. John Thomas Hassapis is affiliated with 3 sites of care and 2 medical groups
Dr. Hassapis' primary practice is WhidbeyHealth Medical Center in Coupeville, Washington, part of WhidbeyHealth. The medical group on file is WhidbeyHealth. Dmand AI also links Dr. Hassapis to 2 more group practices and clinics 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. John Thomas Hassapis' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Hassapis practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| WhidbeyHealth Medical Center | Available with a free account |
| +2 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
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Dr. John Thomas Hassapis is one of 642 general surgeons in Washington
Surgery is Dr. Hassapis' primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. Hassapis is licensed in Washington.
Specialties and state licenses
- Surgery, WashingtonPrimary
General surgeons near Dr. Hassapis
Counts of general surgeons 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. John Thomas Hassapis billed Medicare for 81 services in 2024
CMS data shows 81 Medicare services from Dr. Hassapis across 4 procedure codes in 2024, for 87 Medicare patients. Medicare paid $9,357 for them.
Dr. Hassapis' Medicare services by type, 2024
- Office and hospital visits36
- Surgery25
- Other services20
Where Dr. Hassapis' Medicare services took place, 2024
- In an office3644%
- In a facility4556%
Dr. Hassapis compared with the Washington median for general surgeons, 2024
- Dr. Hassapis
- Washington median
- Medicare services
- 81vs 9212% below
- Medicare patients
- 87vs 88Close to median
- Part D claims
- 24vs 3327% below
Medians across 610 general surgeons in Washington with Dmand AI profiles that report each measure.
Dr. Hassapis' 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. John Thomas Hassapis treated 87 Medicare patients in 2024, average age 74
CMS counts 87 Medicare patients who saw Dr. Hassapis in 2024. The largest group is 65 to 74, with 45 patients. 67% of them have high blood pressure, and 53% have high cholesterol. Their average risk score is 0.73, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Hassapis' median patient age at 67, with 48% women.
Dr. Hassapis' Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Hassapis' Medicare patients by sex, 2024
- Women4147%
- Men4653%
Chronic conditions among Dr. Hassapis' Medicare patients, 2024
- High blood pressure67%
- High cholesterol53%
- Arthritis28%
- Cancer21%
- Diabetes15%
- Anxiety13%
- COPD13%
- Chronic kidney disease13%
Share of Medicare patients with each condition. A patient can have several.
Dr. Hassapis' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 67
Patient panel by sex, all payers
- Women48%
- Men51%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. John Thomas Hassapis wrote 62 Medicare Part D claims in 2024
In 2024, Dr. Hassapis wrote 62 Medicare Part D claims for 43 patients. 55% of them were for generic drugs. CMS names the drug for 24 of them, across 1 drug with 11 or more claims each, at $3,819 in total drug cost.
Dr. Hassapis' Part D claims by kind of drug, 2024
- Generic34 claims55%
- Brand-name28 claims45%
Dr. Hassapis' 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. Hassapis' Part D claims, 2024
- Opioids18%11 of 62 claims
- Antibiotics19%12 of 62 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
Dr. John Thomas Hassapis ranks in the 59th percentile for colonoscopy in Medicare
Dr. Hassapis accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 40 procedures of colonoscopy by Dr. Hassapis, more than 59% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Hassapis ranks in Medicare procedure volume
- Colonoscopy
- 59th percentile40 procedures
- Upper gastrointestinal (GI) endoscopy for acid reflux
- 42nd percentile11 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Hernia repair - groin (open): 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. John Thomas Hassapis graduated from Loyola University of Chicago, Stritch School of Medicine
Dr. Hassapis graduated from Loyola University of Chicago, Stritch School of Medicine in 1990.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. John Thomas Hassapis'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) |
| 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. John Thomas Hassapis
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. John Thomas Hassapis' NPI number?
Dr. John Thomas Hassapis' NPI number is 1992709802. It was assigned on June 8, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. John Thomas Hassapis?
Dr. John Thomas Hassapis is a general surgeon in Coupeville, Washington. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. John Thomas Hassapis practice?
Dr. Hassapis practices at 101 North Main Street, Coupeville, WA 98239. Dr. Hassapis' primary practice is WhidbeyHealth Medical Center in Coupeville, Washington, part of WhidbeyHealth. Dmand AI also links Dr. Hassapis to 2 group practices and clinics and 1 medical group.
What is Dr. John Thomas Hassapis' office phone number?
The practice phone on file for Dr. Hassapis is (360) 678-5151.
What is Dr. John Thomas Hassapis' medical license number?
Dr. Hassapis holds Washington license MD60466656.
Which hospitals is Dr. John Thomas Hassapis affiliated with?
Dr. Hassapis practices at WhidbeyHealth Medical Center in Coupeville, Washington.
What medical group is Dr. John Thomas Hassapis part of?
Dr. Hassapis is linked to WhidbeyHealth. Dmand AI links Dr. Hassapis to 1 more medical group.
Does Dr. John Thomas Hassapis accept Medicare?
Yes. CMS data shows Dr. Hassapis billed Medicare for 81 services in 2024, and Dr. Hassapis accepts Medicare assignment.
How many Medicare patients does Dr. John Thomas Hassapis see?
CMS counts 87 Medicare patients who saw Dr. Hassapis in 2024, with an average age of 74.
What services does Dr. John Thomas Hassapis bill to Medicare?
In 2024, Dr. Hassapis' most billed Medicare services were office visit, new patient (99203), medicare service (G0121) and surgery: digestive system (45385).
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Where did Dr. John Thomas Hassapis go to medical school?
Dr. Hassapis graduated from Loyola University of Chicago, Stritch School of Medicine in 1990.
What drugs does Dr. John Thomas Hassapis prescribe most?
In 2024 Medicare Part D data, Dr. Hassapis' most prescribed drugs by claims were Sutab.
How long has Dr. John Thomas Hassapis been practicing?
Dr. Hassapis graduated from medical school in 1990, 36 years ago.
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