Dr. Maria Zayko, DO
- Medicare services, 2024
- 3,280
- Medicare patients, 2024
- 1,052
- Hospital affiliations
- 5
- Industry payments
- $508
- Medical groups
- 2
- Practice address
- 1615 Delaware Street, Longview, WA 98632
- Practice phone
- Call (360) 414-2000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Zayko's professional email, personal email and mobile number
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Dr. Maria Zayko is a pathologist in Longview, Washington
Dr. Zayko practices at PeaceHealth St. John Medical Center in Longview, Washington, part of PeaceHealth.
Dr. Zayko's NPI, 1184071045, was assigned on May 20, 2016. Dr. Zayko holds Minnesota license 66718.
- NPI
- 1184071045NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1759706260
- NPI enumeration date
- May 20, 2016
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (360) 414-2000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 36
- Medical school graduation
- 2016
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Maria Zayko practices at PeaceHealth St. John Medical Center in Longview, Washington
Dr. Zayko's primary practice is PeaceHealth St. John Medical Center, at 1615 Delaware Street, Longview, WA 98632 in Cowlitz County. The practice phone is (360) 414-2000.
- PeaceHealth St. John Medical Center1615 Delaware Street, Longview, WA 98632 · Cowlitz CountyPhone(360) 414-2000
Source: Dmand AI Affiliation Data
Dr. Maria Zayko is affiliated with 5 sites of care and 2 medical groups
Dr. Zayko's primary practice is PeaceHealth St. John Medical Center in Longview, Washington, part of PeaceHealth. Dr. Zayko is also affiliated with OHSU Hospital. The medical group on file is PeaceHealth St. John Medical Center. Dmand AI also links Dr. Zayko to 3 more hospitals 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. Maria Zayko's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Zayko practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| PeaceHealth St. John Medical Center | Available with a free account |
| +4 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 PeaceHealth and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Maria Zayko is one of 217 pathologists in Washington
Anatomic pathology and clinical pathology is Dr. Zayko's primary specialty in the NPI Registry, under taxonomy code 207ZP0102X. Dr. Zayko is licensed in Minnesota.
Specialties and state licenses
- Anatomic pathology and clinical pathology, MinnesotaPrimary
Pathologists near Dr. Zayko
Counts of pathologists 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. Maria Zayko billed Medicare for 3,280 services in 2024
CMS data shows 3,280 Medicare services from Dr. Zayko across 27 procedure codes in 2024, for 1,052 Medicare patients. Medicare paid $88,261 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Zayko's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Lab and pathology
- 2023: 3,2832024: 3,2601%
- Other services
- 2023: 142024: 2043%
Dr. Zayko compared with the Washington median for pathologists, 2024
- Dr. Zayko
- Washington median
- Medicare services
- 3,280vs 1,4262.3 times
- Medicare patients
- 1,052vs 62070% above
Medians across 205 pathologists in Washington with Dmand AI profiles that report each measure.
Dr. Zayko'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. Zayko?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Zayko and other pathologists in Washington.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Maria Zayko treated 1,052 Medicare patients in 2024, average age 73
CMS counts 1,052 Medicare patients who saw Dr. Zayko in 2024. The largest group is 65 to 74, with 521 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 13% are also on Medicaid. Their average risk score is 1.69, 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. Zayko's median patient age at 68, with 59% women.
Dr. Zayko's Medicare patients by age, 2024
Dr. Zayko's Medicare patients by sex, 2024
- Women61358%
- Men43942%
Chronic conditions among Dr. Zayko's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis56%
- Diabetes39%
- Ischemic heart disease38%
- Chronic kidney disease31%
- Anxiety28%
- Cancer28%
Share of Medicare patients with each condition. A patient can have several.
Dr. Zayko's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 68
Patient panel by sex, all payers
- Women59%
- Men41%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
How Dr. Maria Zayko takes part in Medicare
Dr. Zayko accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Maria Zayko received $508 in industry payments from 2022 to 2024
CMS Open Payments shows 3 general payments to Dr. Zayko from 1 drug or device company from 2022 to 2024. Food and beverage make up the largest share, 100% of the total. Stryker Corporation paid the most, $508.
General payments to Dr. Zayko by program year, 2022 to 2024
Companies that paid Dr. Zayko the most, 2022 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Maria Zayko'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) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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. Maria Zayko
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. Maria Zayko's NPI number?
Dr. Maria Zayko's NPI number is 1184071045. It was assigned on May 20, 2016, and it is active in the NPI Registry.
What kind of doctor is Dr. Maria Zayko?
Dr. Maria Zayko is a pathologist in Longview, Washington. The primary specialty in the NPI Registry is Anatomic Pathology & Clinical Pathology Physician (taxonomy code 207ZP0102X).
Where does Dr. Maria Zayko practice?
Dr. Zayko practices at 1615 Delaware Street, Longview, WA 98632. Dr. Zayko's primary practice is PeaceHealth St. John Medical Center in Longview, Washington, part of PeaceHealth. Dmand AI also links Dr. Zayko to 3 hospitals and 1 medical group.
What is Dr. Maria Zayko's office phone number?
The practice phone on file for Dr. Zayko is (360) 414-2000.
What is Dr. Maria Zayko's medical license number?
Dr. Zayko holds Minnesota license 66718.
Which hospitals is Dr. Maria Zayko affiliated with?
Dr. Zayko practices at PeaceHealth St. John Medical Center in Longview, Washington. Dr. Zayko is also affiliated with OHSU Hospital. Dmand AI links Dr. Zayko to 3 more hospitals.
What medical group is Dr. Maria Zayko part of?
Dr. Zayko is linked to PeaceHealth St. John Medical Center. Dmand AI links Dr. Zayko to 1 more medical group.
Does Dr. Maria Zayko accept Medicare?
Yes. CMS data shows Dr. Zayko billed Medicare for 3,280 services in 2024, and Dr. Zayko accepts Medicare assignment.
How many Medicare patients does Dr. Maria Zayko see?
CMS counts 1,052 Medicare patients who saw Dr. Zayko in 2024, with an average age of 73.
What services does Dr. Maria Zayko bill to Medicare?
In 2024, Dr. Zayko's most billed Medicare services were lab and pathology test (88305), lab and pathology test (88341) and lab and pathology test (88342).
Has Dr. Maria Zayko received payments from drug or device companies?
CMS Open Payments shows $508 in general payments to Dr. Zayko from 1 company from 2022 to 2024. The largest total came from Stryker Corporation.
How long has Dr. Maria Zayko been practicing?
Dr. Zayko graduated from medical school in 2016, 10 years ago.
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