Ryan O'Malley, NP-C
NPI 1538521364 · Adult Health Nurse Practitioner · Los Angeles, CA
Enrolled with Medicare as Order and Referring Only - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ryan O'Malley, NP-C is a Adult Health Nurse Practitioner provider in Los Angeles, CA (NPI 1538521364).
Provider details
- NPI number
- 1538521364
- Entity type
- Individual
- Primary specialty
- Adult Health Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- NP-C
- Sex
- Male
- Sole proprietor
- No
- License
- 95003953 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
10 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 18 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 1,163 | 222 |
| Gabapentin | 816 | 211 |
| Pregabalin | 592 | 92 |
| Tramadol Hcl | 529 | 116 |
| Buprenorphine Hcl/Naloxone Hclbrand: Buprenorphine-Naloxone | 164 | 25 |
| Oxycodone Hcl/Acetaminophenbrand: Oxycodone-Acetaminophen | 156 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2016-03-22
- Last updated
- 2026-04-01
- Certified
- 2026-04-01
Frequently asked questions
- What is Ryan O'Malley's NPI number?
- Ryan O'Malley's National Provider Identifier (NPI) is 1538521364, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ryan O'Malley's specialty?
- Ryan O'Malley is listed in the NPPES registry with a primary specialty of Adult Health Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Ryan O'Malley located?
- Ryan O'Malley's practice location on file with NPPES is 1828 E Cesar E Chavez Ave Ste 4500, Los Angeles, CA 90033-2577.
- What is Ryan O'Malley's phone number?
- The practice phone number listed in the NPPES registry for Ryan O'Malley is (562) 355-9344.
- Does Ryan O'Malley accept Medicare?
- Ryan O'Malley is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ryan O'Malley's NPI active?
- Yes — Ryan O'Malley's NPI (1538521364) is active in the NPPES registry as of the last update on 2026-04-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.