Marissa Ann Walker, FNP
- Part D claims, 2024
- 71
- Hospital affiliations
- 1
- Industry payments
- $14
- State license
- 1
- Year NPI issued
- 2024
- Practice address
- 400 W Mineral King Ave, Visalia, CA 93291
- Practice phone
- Call (559) 624-2000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Marissa Walker's professional email, personal email and mobile number
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Marissa Ann Walker is a family nurse practitioner in Visalia, California
Marissa Walker practices at Kaweah Health Medical Center in Visalia, California, part of Kaweah Delta Health Care District.
Marissa Walker's NPI, 1528820578, was assigned on January 25, 2024. Marissa Walker holds California license 95028660.
- NPI
- 1528820578NPI Registry (opens in a new tab)
- NPI enumeration date
- January 25, 2024
- NPI status
- Active
- Practice phone
- (559) 624-2000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Marissa Ann Walker practices at Kaweah Health Medical Center in Visalia, California
Marissa Walker's primary practice is Kaweah Health Medical Center, at 400 W Mineral King Ave, Visalia, CA 93291 in Tulare County. The practice phone is (559) 624-2000.
- Kaweah Health Medical Center400 W Mineral King Ave, Visalia, CA 93291 · Tulare CountyPhone(559) 624-2000
Source: Dmand AI Affiliation Data
Marissa Ann Walker is affiliated with 1 site of care
Marissa Walker's primary practice is Kaweah Health Medical Center in Visalia, California, part of Kaweah Delta Health Care District. Marissa Walker'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 Marissa Ann Walker's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Marissa Walker practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Kaweah Health Medical Center | 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 Kaweah Delta Health Care District and 6.2K+ hospitals, with verified contacts in the same login.
Marissa Ann Walker is one of 13,532 family nurse practitioners in California
Family is Marissa Walker's primary specialty in the NPI Registry, under taxonomy code 363LF0000X. Marissa Walker is licensed in California.
Specialties and state licenses
- Family nurse practitioner, CaliforniaPrimary
Family nurse practitioners near Marissa Walker
Counts of family nurse practitioners 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
Marissa Ann Walker's patients have a median age of 9
Across all payers, Dmand AI patient panel data puts Marissa Walker's median patient age at 9, with 68% women.
Marissa Walker's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 9
Patient panel by sex, all payers
- Women68%
- Men32%
Source: Dmand AI Patient Panel Data
Marissa Ann Walker wrote 71 Medicare Part D claims in 2024
In 2024, Marissa Walker wrote 71 Medicare Part D claims for 37 patients. 87% of them were for generic drugs.
Marissa Walker's Part D claims by kind of drug, 2024
- Generic62 claims87%
- Brand-name and other9 claims13%
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Marissa Ann Walker received $14 in industry payments in 2024
CMS Open Payments shows 1 general payment to Marissa Walker from 1 drug or device company in 2024. Food and beverage make up the largest share, 100% of the total. Phathom Pharmaceuticals, Inc. paid the most, $14.
Companies that paid Marissa Walker the most, 2024 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Marissa Ann Walker'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 Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider (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 Marissa Ann Walker
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Marissa Ann Walker's NPI number?
Marissa Ann Walker's NPI number is 1528820578. It was assigned on January 25, 2024, and it is active in the NPI Registry.
What does Marissa Ann Walker specialize in?
Marissa Ann Walker is a family nurse practitioner in Visalia, California. The primary specialty in the NPI Registry is Family Nurse Practitioner (taxonomy code 363LF0000X).
Where does Marissa Ann Walker practice?
Marissa Walker practices at 400 W Mineral King Ave, Visalia, CA 93291. Marissa Walker's primary practice is Kaweah Health Medical Center in Visalia, California, part of Kaweah Delta Health Care District.
What is Marissa Ann Walker's office phone number?
The practice phone on file for Marissa Walker is (559) 624-2000.
What is Marissa Ann Walker's medical license number?
Marissa Walker holds California license 95028660.
Which hospitals is Marissa Ann Walker affiliated with?
Marissa Walker practices at Kaweah Health Medical Center in Visalia, California.
Has Marissa Ann Walker received payments from drug or device companies?
CMS Open Payments shows $14 in general payments to Marissa Walker from 1 company from 2024 to 2024. The largest total came from Phathom Pharmaceuticals, Inc.
How long has Marissa Ann Walker been practicing?
Marissa Walker's NPI was assigned in 2024.
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