Douglas Frey, MSN, NP-C, FNP
Family Nurse Practitioner · Oakland, CA
Douglas Frey, MSN, NP-C, FNP is a family nurse practitioner with a practice address in Oakland, California, and NPI 1467711572, issued on May 9, 2012. Check the license (California 21559, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Douglas Frey
- Credential
- MSN, NP-C, FNP
- Primary taxonomy
- Family Nurse Practitioner 363LF0000X
- License number
- 21559 CA
Self-reported in NPPES; status is on the state search - Practice location
- 616 16TH St, Oakland, CA 94612
- Phone
- (510) 451-1273
- Enumerated
- May 9, 2012
- Record last updated
- May 9, 2012 (not updated in 14 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20150219000385); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family nurse practitioner records → All 16,966 in California → Look up another NPI →
Also registered at 616 16TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Matthew Day, L.C.S.W.Clinical Social Worker1235345869
- Susan Ferguson, MDAddiction Medicine (Internal Medicine) Physician1093756678
- Kirsten FlaggFamily Nurse Practitioner1134537244
Verify Douglas Frey in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 21559Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
58% more Medicare Part D claims than the average family nurse practitioner in 2024
2,059 Medicare Part D claims for 210 beneficiaries, against an average of 1,305 among the 140,557 providers of this specialty who prescribed in Part D. Brand-name drugs were 21% of claims.
Most prescribed
- Atorvastatin Calcium317 claims
- Amlodipine Besylate120 claims
- Ozempic97 claims
- Albuterol Sulfate Hfa77 claims
- Gabapentin73 claims
- Metformin Hcl69 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Lifelong Medical CareOakland, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Douglas Frey among 16,966 family nurse practitioner records in California
Douglas Frey, MSN, NP-C, FNP is one of 16,966 family nurse practitioner records with a practice address in California. 67% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2012, is newer than 21% of them.
- NPI issued2012 · 21% of these records are older, 76% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileYes · 40% of these records are
- Graduated2011 · median 2019 among the 6,793 with a school on file
- Record last updated2012 · 42% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LF0000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
205 family nurse practitioner records list a practice address in Oakland
They are 205 of the 18,558 NPPES records with a practice address in Oakland, and 16,966 family nurse practitioner records in California.
All 16,966 in California → Every provider in Oakland → Family Nurse Practitioner nationwide →
The 8 family nurse practitioner records with the nearest ZIP codes
- Josey Abraham, DNPOakland, CA 946121619587540
- Anastasia Barnes-Perrilliat, FNPOakland, CA 946121821373044
- Amber Colic, RN MSN FNP-COakland, CA 946121326429770
- Kirsten FlaggOakland, CA 946121134537244
- Ma Bernadette Garza, RN, FNPOakland, CA 946121093451817
- Dorola Haley, FNPOakland, CA 946121285756221
- Leonard Kaku, NPOakland, CA 946121942252572
- Kathleen Lefevre, NPOakland, CA 946121225011752
Common questions
What is Douglas Frey, MSN, NP-C, FNP's NPI number?
Douglas Frey, MSN, NP-C, FNP's National Provider Identifier (NPI) is 1467711572, issued on May 9, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Douglas Frey, MSN, NP-C, FNP located?
The NPPES record lists a practice address at 616 16TH St, Oakland, CA, 94612. Phone: (510) 451-1273. Providers update this record themselves, so call before visiting.
How can I verify Douglas Frey, MSN, NP-C, FNP's license?
NPPES lists California license number 21559, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Douglas Frey, MSN, NP-C, FNP prescribe under Medicare Part D?
In 2024, Douglas Frey, MSN, NP-C, FNP had 2,059 Medicare Part D claims for 210 beneficiaries; the average among family nurse practitioner prescribers was 1,305. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.