Dr. Peter Zajac, DO
- Medicare patients, 2024
- 20
- Part D claims, 2024
- 53
- Hospital affiliations
- 1
- Industry payments
- $128
- Medical groups
- 2
- Practice address
- 801 East Wheeler Road, Moses Lake, WA 98837
- Practice phone
- Call (509) 765-5606
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Zajac'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. Peter Zajac is a general surgeon in Moses Lake, Washington
Dr. Zajac practices at Samaritan Hospital in Moses Lake, Washington, part of Samaritan Healthcare.
Dr. Zajac's NPI, 1477110419, was assigned on May 24, 2019. Dr. Zajac graduated from Edward Via Col of Osteo Medicine-Virginia Campus in 2019. Dr. Zajac holds Washington license OP61502695.
- NPI
- 1477110419NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1951847425
- NPI enumeration date
- May 24, 2019
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (509) 765-5606
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 33
- Medical school graduation
- 2019
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Peter Zajac practices at Samaritan Hospital in Moses Lake, Washington
Dr. Zajac's primary practice is Samaritan Hospital, at 801 East Wheeler Road, Moses Lake, WA 98837 in Grant County. The practice phone is (509) 765-5606.
- Samaritan Hospital801 East Wheeler Road, Moses Lake, WA 98837 · Grant CountyPhone(509) 765-5606
Source: Dmand AI Affiliation Data
Dr. Peter Zajac is affiliated with 3 sites of care and 2 medical groups
Dr. Zajac's primary practice is Samaritan Hospital in Moses Lake, Washington, part of Samaritan Healthcare. The medical group on file is Samaritan Clinic. Dmand AI also links Dr. Zajac to 1 more breast imaging center, 1 rural health clinic and 1 medical group, each named with a free account. Dr. Zajac's employer is on file too: a hospital.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Peter Zajac's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Zajac practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Samaritan Hospital | 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
Dmand AI maps EHR vendors, IT decision makers and buying committees across Samaritan Healthcare and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Peter Zajac is one of 642 general surgeons in Washington
Surgery is Dr. Zajac's primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. Zajac is licensed in Washington.
Specialties and state licenses
- Surgery, WashingtonPrimary
General surgeons near Dr. Zajac
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. Peter Zajac treated 20 Medicare patients in 2024, average age 63
CMS counts 20 Medicare patients who saw Dr. Zajac in 2024. 70% of them have high blood pressure, and 70% have high cholesterol. Their average risk score is 1.39, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Zajac's median patient age at 54, with 61% women.
Chronic conditions among Dr. Zajac's Medicare patients, 2024
- High blood pressure70%
- High cholesterol70%
- Mood disorders60%
Share of Medicare patients with each condition. A patient can have several.
Dr. Zajac's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 54
Patient panel by sex, all payers
- Women61%
- Men39%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Peter Zajac wrote 53 Medicare Part D claims in 2024
In 2024, Dr. Zajac wrote 53 Medicare Part D claims for 22 patients. 98% of them were for generic drugs. CMS names the drug for 22 of them, across 2 drugs with 11 or more claims each, at $71 in total drug cost.
Dr. Zajac's Part D claims by kind of drug, 2024
- Generic52 claims98%
- Brand-name and other1 claims2%
Dr. Zajac'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. Zajac's Part D claims, 2024
- Opioids23%12 of 53 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
How Dr. Peter Zajac takes part in Medicare
Dr. Zajac 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)
Hernia repair (minimally invasive): 1 to 10 procedures (CMS shows small counts as a range)
Hernia repair - groin (open): 1 to 10 procedures (CMS shows small counts as a range)
Melanoma (skin cancer) excision: 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. Peter Zajac received $128 in industry payments from 2024 to 2025
CMS Open Payments shows 2 general payments to Dr. Zajac from 2 drug and device companies from 2024 to 2025. Food and beverage make up the largest share, 100% of the total. CONMED Corporation paid the most, $108.
General payments to Dr. Zajac by program year, 2024 to 2025
Companies that paid Dr. Zajac the most, 2024 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Peter Zajac graduated from Edward Via Col of Osteo Medicine-Virginia Campus
Dr. Zajac graduated from Edward Via Col of Osteo Medicine-Virginia Campus in 2019.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Peter Zajac'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 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. Peter Zajac
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. Peter Zajac's NPI number?
Dr. Peter Zajac's NPI number is 1477110419. It was assigned on May 24, 2019, and it is active in the NPI Registry.
What kind of doctor is Dr. Peter Zajac?
Dr. Peter Zajac is a general surgeon in Moses Lake, Washington. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. Peter Zajac practice?
Dr. Zajac practices at 801 East Wheeler Road, Moses Lake, WA 98837. Dr. Zajac's primary practice is Samaritan Hospital in Moses Lake, Washington, part of Samaritan Healthcare. Dmand AI also links Dr. Zajac to 1 breast imaging center, 1 rural health clinic and 1 medical group.
What is Dr. Peter Zajac's office phone number?
The practice phone on file for Dr. Zajac is (509) 765-5606.
What is Dr. Peter Zajac's medical license number?
Dr. Zajac holds Washington license OP61502695.
Which hospitals is Dr. Peter Zajac affiliated with?
Dr. Zajac practices at Samaritan Hospital in Moses Lake, Washington.
What medical group is Dr. Peter Zajac part of?
Dr. Zajac is linked to Samaritan Clinic. Dmand AI links Dr. Zajac to 1 more medical group.
Does Dr. Peter Zajac accept Medicare?
Yes. CMS lists Dr. Zajac as accepting Medicare assignment.
How many Medicare patients does Dr. Peter Zajac see?
CMS counts 20 Medicare patients who saw Dr. Zajac in 2024, with an average age of 63.
Where did Dr. Peter Zajac go to medical school?
Dr. Zajac graduated from Edward Via Col of Osteo Medicine-Virginia Campus in 2019.
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What drugs does Dr. Peter Zajac prescribe most?
In 2024 Medicare Part D data, Dr. Zajac's most prescribed drugs by claims were Ondansetron ODT and Oxycodone HCl.
Has Dr. Peter Zajac received payments from drug or device companies?
CMS Open Payments shows $128 in general payments to Dr. Zajac from 2 companies from 2024 to 2025. The largest total came from CONMED Corporation.
How long has Dr. Peter Zajac been practicing?
Dr. Zajac graduated from medical school in 2019, 7 years ago.
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