Ryan Keith O'Malley, NP-C
Adult Health Nurse Practitioner · Los Angeles, CA
Ryan Keith O'Malley, NP-C is an adult health nurse practitioner with a practice address in Los Angeles, California, and NPI 1538521364, issued on Mar 22, 2016. Check the license (California 95003953, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Ryan Keith O'Malley
- Credential
- NP-C
- Primary taxonomy
- Adult Health Nurse Practitioner 363LA2200X
- License number
- 95003953 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1828 E Cesar E Chavez Ave Ste 4500, Los Angeles, CA 90033
- Phone
- (562) 355-9344
- Enumerated
- Mar 22, 2016
- Record last updated
- Apr 1, 2026
- Fax
- (213) 600-0541
- Entity
- Type 1 · individual
8 nearest adult health nurse practitioner records → All 1,405 in California → Look up another NPI →
Verify Ryan Keith O'Malley in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 95003953Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.3 times the Medicare Part D claims of the average adult health nurse practitioner in 2024
4,168 Medicare Part D claims for 552 beneficiaries, against an average of 1,280 among the 16,937 providers of this specialty who prescribed in Part D. Brand-name drugs were 3% of claims. 2,168 claims were for opioids.
Most prescribed
- Hydrocodone-Acetaminophen1,163 claims
- Gabapentin816 claims
- Pregabalin592 claims
- Tramadol Hcl529 claims
- Buprenorphine-Naloxone164 claims
- Oxycodone-Acetaminophen156 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.
Ryan Keith O'Malley among 1,405 adult health nurse practitioner records in California
Ryan Keith O'Malley, NP-C is one of 1,405 adult health nurse practitioner records with a practice address in California. 56% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2016, is newer than 68% of them.
- NPI issued2016 · 68% of these records are older, 27% newer
- In a Medicare fileYes · 56% of these records are
- In the CMS Doctors and Clinicians fileNo · 31% of these records are
- Record last updated2026 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LA2200X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Adult Health Nurse Practitioner providers in California
There are 1,405 adult health nurse practitioner records in California.
All 1,405 in California → Every provider in Los Angeles → Adult Health Nurse Practitioner nationwide →
The 8 adult health nurse practitioner records with the nearest ZIP codes
- Sybil Cross, NP-CLos Angeles, CA 900331982823407
- Catherine Karen Digon, NPLos Angeles, CA 900331831528959
- Evelyne Fleury-Milfort, N.P.Los Angeles, CA 900331518996594
- Tammy Harper, NP-CLos Angeles, CA 900331164537023
- Hoi Yan Kwong, NPLos Angeles, CA 900331881941250
- Marilyn Lee, NP-C (NURSE PRACTITILos Angeles, CA 900331558783258
- Ryan Reformina, NP-CLos Angeles, CA 900331245635218
- Reiko Sasaki, NP-CLos Angeles, CA 900331891010930
Common questions
What is Ryan Keith O'Malley, NP-C's NPI number?
Ryan Keith O'Malley, NP-C's National Provider Identifier (NPI) is 1538521364, issued on Mar 22, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Ryan Keith O'Malley, NP-C located?
The NPPES record lists a practice address at 1828 E Cesar E Chavez Ave Ste 4500, Los Angeles, CA, 90033. Phone: (562) 355-9344. Providers update this record themselves, so call before visiting.
How can I verify Ryan Keith O'Malley, NP-C's license?
NPPES lists California license number 95003953, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Ryan Keith O'Malley, NP-C prescribe under Medicare Part D?
In 2024, Ryan Keith O'Malley, NP-C had 4,168 Medicare Part D claims for 552 beneficiaries; the average among adult health nurse practitioner prescribers was 1,280. 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.