Mary Kathleen Herrera, FNP-C
- Part D claims, 2024
- 2,820
- Industry payments
- $1,835
- Affiliated sites
- 1
- Medical group
- 1
- State license
- 1
- Practice address
- 23823 Valencia Blvd, Valencia, CA 91355
- Practice phone
- Call (661) 254-0026
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Dennis Patrick Lewis,MD
Valencia, California
Find Mary Herrera'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.
Mary Kathleen Herrera is a family nurse practitioner in Valencia, California
Mary Herrera practices at Dennis Patrick Lewis,MD in Valencia, California.
Mary Herrera's NPI, 1962700104, was assigned on March 12, 2011. Mary Herrera holds California license NP6695.
- NPI
- 1962700104NPI Registry (opens in a new tab)
- NPI enumeration date
- March 12, 2011
- NPI status
- Active
- Practice phone
- (661) 254-0026
- 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 Practice Data
Mary Kathleen Herrera practices at Dennis Patrick Lewis,MD in Valencia, California
Mary Herrera's primary practice is Dennis Patrick Lewis,MD, at 23823 Valencia Blvd, Valencia, CA 91355 in Los Angeles County. The practice phone is (661) 254-0026.
- Dennis Patrick Lewis,MD23823 Valencia Blvd, Valencia, CA 91355 · Los Angeles CountyPhone(661) 254-0026
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Mary Kathleen Herrera is affiliated with 2 sites of care and 1 medical group
Mary Herrera's primary practice is Dennis Patrick Lewis,MD in Valencia, California. The medical group on file is SCV Quality Care. Dmand AI also links Mary Herrera to 1 more group practice or clinic, named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Mary Kathleen Herrera's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Mary Herrera practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Dennis Patrick Lewis,MD | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Mary Kathleen Herrera is one of 13,532 family nurse practitioners in California
Family is Mary Herrera's primary specialty in the NPI Registry, under taxonomy code 363LF0000X. Mary Herrera is board certified in family nurse practitioner by the American Academy of Nurse Practitioners Certification Program (AANPCP). Mary Herrera is licensed in California.
Specialties and state licenses
- Family nurse practitioner, CaliforniaPrimary
Family nurse practitioners near Mary Herrera
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
Mary Kathleen Herrera's patients have a median age of 64
Across all payers, Dmand AI patient panel data puts Mary Herrera's median patient age at 64, with 67% women.
Mary Herrera's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 64
Patient panel by sex, all payers
- Women67%
- Men31%
Source: Dmand AI Patient Panel Data
Mary Kathleen Herrera wrote 2,820 Medicare Part D claims in 2024
In 2024, Mary Herrera wrote 2,820 Medicare Part D claims for 545 patients. 89% of them were for generic drugs. CMS names the drug for 2,314 of them, across 65 drugs with 11 or more claims each, at $70,525 in total drug cost.
Mary Herrera's Part D claims by kind of drug, 2024
- Generic2,516 claims89%
- Brand-name and other304 claims11%
Mary Herrera'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 Mary Herrera's Part D claims, 2024
- Opioids1%26 of 2,820 claims
- Antibiotics7%197 of 2,820 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
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Mary Kathleen Herrera received $1,835 in industry payments from 2024 to 2025
CMS Open Payments shows 80 general payments to Mary Herrera from 16 drug and device companies from 2024 to 2025. Food and beverage make up the largest share, 100% of the total. AstraZeneca Pharmaceuticals LP paid the most, $561.
General payments to Mary Herrera by program year, 2024 to 2025
Companies that paid Mary Herrera the most, 2024 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Mary Kathleen Herrera is board certified in family nurse practitioner
- Board certified in family nurse practitioner
Source: Dmand AI Professional Profile Data
Sources for Mary Kathleen Herrera'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| 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) |
| 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 Mary Kathleen Herrera
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Mary Kathleen Herrera's NPI number?
Mary Kathleen Herrera's NPI number is 1962700104. It was assigned on March 12, 2011, and it is active in the NPI Registry.
What does Mary Kathleen Herrera specialize in?
Mary Kathleen Herrera is a family nurse practitioner in Valencia, California. The primary specialty in the NPI Registry is Family Nurse Practitioner (taxonomy code 363LF0000X).
Where does Mary Kathleen Herrera practice?
Mary Herrera practices at 23823 Valencia Blvd, Valencia, CA 91355. Mary Herrera's primary practice is Dennis Patrick Lewis,MD in Valencia, California. Dmand AI also links Mary Herrera to 1 group practice or clinic.
What is Mary Kathleen Herrera's office phone number?
The practice phone on file for Mary Herrera is (661) 254-0026.
What is Mary Kathleen Herrera's medical license number?
Mary Herrera holds California license NP6695.
What medical group is Mary Kathleen Herrera part of?
Mary Herrera is linked to SCV Quality Care.
Is Mary Kathleen Herrera board certified?
Yes. Mary Herrera is board certified in family nurse practitioner by the American Academy of Nurse Practitioners Certification Program (AANPCP).
What drugs does Mary Kathleen Herrera prescribe most?
In 2024 Medicare Part D data, Mary Herrera's most prescribed drugs by claims were Atorvastatin Calcium, Losartan Potassium and Amlodipine Besylate.
Has Mary Kathleen Herrera received payments from drug or device companies?
CMS Open Payments shows $1,835 in general payments to Mary Herrera from 16 companies from 2024 to 2025. The largest total came from AstraZeneca Pharmaceuticals LP.
How long has Mary Kathleen Herrera been practicing?
Mary Herrera's NPI was assigned in 2011.
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