Marc Daniel Oh, FNP-C, RN
Family Nurse Practitioner · Castaic, CA
Marc Daniel Oh, FNP-C, RN is a family nurse practitioner with a practice address in Castaic, California, and NPI 1235847625, issued on Nov 14, 2022. Check the license (California 95023436, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Marc Daniel Oh
- Credential
- FNP-C, RN
- Primary taxonomy
- Family Nurse Practitioner 363LF0000X
- License numbers
- 95023436 CA
95208278 CA
Self-reported in NPPES; status is on the state search - Practice location
- 31541 Rocca Dr, Castaic, CA 91384
- Phone
- (661) 207-1326
- Enumerated
- Nov 14, 2022
- Record last updated
- May 8, 2023
- Entity
- Type 1 · individual
8 nearest family nurse practitioner records → All 16,966 in California → Look up another NPI →
Also registered at 31541 Rocca Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Beth Kathryn OhFamily Nurse Practitioner1023437001
Verify Marc Daniel Oh in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 95023436Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
43% fewer Medicare Part D claims than the average family nurse practitioner in 2024
744 Medicare Part D claims for 120 beneficiaries, against an average of 1,305 among the 140,557 providers of this specialty who prescribed in Part D.
Most prescribed
- Amlodipine Besylate64 claims
- Metformin Hcl49 claims
- Atorvastatin Calcium46 claims
- Januvia36 claims
- Jardiance28 claims
- Lisinopril21 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.
Industry payments in 2024: $155.51
6 payments; by number, the most common kind was food and beverage; the largest payer was Novo Nordisk Inc. The 99,489 providers of this specialty with any payment received $650.95 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Marc Daniel Oh among 16,966 family nurse practitioner records in California
Marc Daniel Oh, FNP-C, RN 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 2022, is newer than 68% of them.
- NPI issued2022 · 68% of these records are older, 25% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileNo · 40% of these records are
- Record last updated2023 · 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).
9 family nurse practitioner records list a practice address in Castaic
They are 9 of the 95 NPPES records with a practice address in Castaic, and 16,966 family nurse practitioner records in California.
All 16,966 in California → Every provider in Castaic → Family Nurse Practitioner nationwide →
The 8 family nurse practitioner records with the nearest ZIP codes
- Ashley AbalCastaic, CA 913841740140698
- Emily Cope, NPCastaic, CA 913841366375115
- Lisa Esplana, NPCastaic, CA 913841336928340
- Cindy Herrera, NP, RNCastaic, CA 913841548195134
- Karleen Kim, FNPCastaic, CA 913841851196901
- Fariba Mason, NPVal Verde, CA 913841811979347
- Beth Kathryn OhCastaic, CA 913841023437001
- Cristina Taghilou, FNPCastaic, CA 913841386320380
Common questions
What is Marc Daniel Oh, FNP-C, RN's NPI number?
Marc Daniel Oh, FNP-C, RN's National Provider Identifier (NPI) is 1235847625, issued on Nov 14, 2022. An NPI identifies a provider in billing; it is not a license.
Where is Marc Daniel Oh, FNP-C, RN located?
The NPPES record lists a practice address at 31541 Rocca Dr, Castaic, CA, 91384. Phone: (661) 207-1326. Providers update this record themselves, so call before visiting.
How can I verify Marc Daniel Oh, FNP-C, RN's license?
NPPES lists California license number 95023436, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Marc Daniel Oh, FNP-C, RN prescribe under Medicare Part D?
In 2024, Marc Daniel Oh, FNP-C, RN had 744 Medicare Part D claims for 120 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.