Margaret Ruth Spencer, NP
- Part D claims, 2024
- 1,073
- Hospital affiliations
- 2
- Industry payments
- $1,760
- Medical group
- 1
- State license
- 1
- Practice address
- 18000 Studebaker Rd, Cerritos, CA 90703
- Practice phone
- Call (520) 276-2270
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Toi Oro Valley
Cerritos, California
Find Margaret Spencer'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.
Margaret Ruth Spencer is a family nurse practitioner in Cerritos, California
Margaret Spencer practices at Toi Oro Valley in Cerritos, California.
Margaret Spencer's NPI, 1124690979, was assigned on July 12, 2021. Margaret Spencer holds Arizona license 244857.
- NPI
- 1124690979NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2961891510
- NPI enumeration date
- July 12, 2021
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (520) 276-2270
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 32
- Medical school graduation
- 2020
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Margaret Ruth Spencer practices at Toi Oro Valley in Cerritos, California
Margaret Spencer's primary practice is Toi Oro Valley, at 18000 Studebaker Rd, Cerritos, CA 90703 in Los Angeles County. The practice phone is (520) 276-2270.
- Toi Oro Valley18000 Studebaker Rd, Cerritos, CA 90703 · Los Angeles CountyPhone(520) 276-2270
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Margaret Ruth Spencer is affiliated with 4 sites of care and 1 medical group
Margaret Spencer's primary practice is Toi Oro Valley in Cerritos, California. Margaret Spencer is also affiliated with Northwest Medical Center. The medical group on file is The Oncology Institute of Hope and Innovation. Dmand AI also links Margaret Spencer to 1 more hospital and 1 group practice or clinic, each 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 Margaret Ruth Spencer's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Margaret Spencer practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Toi Oro Valley | Available with a free account |
| +3 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Margaret Ruth Spencer is one of 13,532 family nurse practitioners in California
Family is Margaret Spencer's primary specialty in the NPI Registry, under taxonomy code 363LF0000X. Margaret Spencer is licensed in Arizona.
Specialties and state licenses
- Family nurse practitioner, ArizonaPrimary
Family nurse practitioners near Margaret Spencer
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
Margaret Ruth Spencer's patients have a median age of 75
Across all payers, Dmand AI patient panel data puts Margaret Spencer's median patient age at 75, with 65% women.
Margaret Spencer's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 75
Patient panel by sex, all payers
- Women65%
- Men34%
Source: Dmand AI Patient Panel Data
Margaret Ruth Spencer wrote 1,073 Medicare Part D claims in 2024
In 2024, Margaret Spencer wrote 1,073 Medicare Part D claims for 260 patients. 67% of them were for generic drugs.
Margaret Spencer's Part D claims by kind of drug, 2024
- Generic722 claims67%
- Brand-name351 claims33%
Drug classes CMS tracks in Margaret Spencer's Part D claims, 2024
- Opioids7%78 of 1,073 claims
- Antibiotics1%13 of 1,073 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Margaret Ruth Spencer takes part in Medicare
Margaret Spencer 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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Margaret Ruth Spencer received $1,760 in industry payments in 2025
CMS Open Payments shows 83 general payments to Margaret Spencer from 35 drug and device companies in 2025. Food and beverage make up the largest share, 100% of the total. Janssen Pharmaceuticals, Inc paid the most, $219.
General payments to Margaret Spencer by kind, 2025 to 2025
- Food and beverage$1,760100%
- Education$10%
Companies that paid Margaret Spencer the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Margaret Ruth Spencer'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 (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 Margaret Ruth Spencer
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Margaret Ruth Spencer's NPI number?
Margaret Ruth Spencer's NPI number is 1124690979. It was assigned on July 12, 2021, and it is active in the NPI Registry.
What does Margaret Ruth Spencer specialize in?
Margaret Ruth Spencer is a family nurse practitioner in Cerritos, California. The primary specialty in the NPI Registry is Family Nurse Practitioner (taxonomy code 363LF0000X).
Where does Margaret Ruth Spencer practice?
Margaret Spencer practices at 18000 Studebaker Rd, Cerritos, CA 90703. Margaret Spencer's primary practice is Toi Oro Valley in Cerritos, California. Dmand AI also links Margaret Spencer to 1 hospital and 1 group practice or clinic.
What is Margaret Ruth Spencer's office phone number?
The practice phone on file for Margaret Spencer is (520) 276-2270.
What is Margaret Ruth Spencer's medical license number?
Margaret Spencer holds Arizona license 244857.
Which hospitals is Margaret Ruth Spencer affiliated with?
Margaret Spencer is affiliated with Northwest Medical Center. Dmand AI links Margaret Spencer to 1 more hospital.
What medical group is Margaret Ruth Spencer part of?
Margaret Spencer is linked to The Oncology Institute of Hope and Innovation.
Does Margaret Ruth Spencer accept Medicare?
Yes. CMS lists Margaret Spencer as accepting Medicare assignment.
Has Margaret Ruth Spencer received payments from drug or device companies?
CMS Open Payments shows $1,760 in general payments to Margaret Spencer from 35 companies from 2025 to 2025. The largest total came from Janssen Pharmaceuticals, Inc.
How long has Margaret Ruth Spencer been practicing?
Margaret Spencer graduated from medical school in 2020, 6 years ago.
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