Rosalia Osias, M.D.
NPI 1669582938 · Internal Medicine Physician · Anaheim, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Rosalia Osias, M.D. is a Internal Medicine Physician provider in Anaheim, CA (NPI 1669582938).
Provider details
- NPI number
- 1669582938
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- Yes
- License
- A78239 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
2,932 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. 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 .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Telephone Medical Discussion With Physician, 11-20 Minutes99442 | 1,249 | $98 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 665 | $99 |
| Subsequent Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99309 | 331 | $114 |
| Physician Or Allowed Practitioner Re-Certification for Medicare-Covered Home Health Services Under a Home Health Plan of Care (patient Not Present), Including Contacts With Home Health Agency and Review of Reports of Patient Status Required By Physicians aG0179 | 175 | $46 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 155 | $140 |
| Physician Or Allowed Practitioner Certification for Medicare-Covered Home Health Services Under a Home Health Plan of Care (patient Not Present), Including Contacts With Home Health Agency and Review of Reports of Patient Status Required By Physicians and |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 123 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amlodipine Besylate | 991 | 272 |
| Atorvastatin Calcium | 645 | 171 |
| Losartan Potassium | 610 | 167 |
| Metformin Hcl | 517 | 144 |
| Levothyroxine Sodium | 356 | 73 |
| Glipizide | 348 | 81 |
| Lisinopril | 288 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$190 across 19 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-08-30
- Last updated
- 2012-04-19
Frequently asked questions
- What is Rosalia Osias's NPI number?
- Rosalia Osias's National Provider Identifier (NPI) is 1669582938, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Rosalia Osias's specialty?
- Rosalia Osias is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Rosalia Osias located?
- Rosalia Osias's practice location on file with NPPES is 3340 W Ball Rd, Anaheim, CA 92804-3729.
- What is Rosalia Osias's phone number?
- The practice phone number listed in the NPPES registry for Rosalia Osias is (714) 723-0787.
- Does Rosalia Osias accept Medicare?
- Rosalia Osias is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Rosalia Osias's NPI active?
- Yes — Rosalia Osias's NPI (1669582938) is active in the NPPES registry as of the last update on 2012-04-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.