Karen Ossa, M.D.
NPI 1801005418 · Internal Medicine Physician · San Juan, PR
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Karen Ossa, M.D. is a Internal Medicine Physician provider in San Juan, PR (NPI 1801005418).
Provider details
- NPI number
- 1801005418
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- Yes
- License
- 16274 (PR)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
604 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 358 | $118 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 106 | $114 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 94 | $78 |
| Hospital Discharge Day Management, 30 Minutes Or Less99238 | 31 | $79 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 15 | $172 |
Typical Medicare-allowed amounts for these services range $78–$172 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 7 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Gabapentin | 35 | 31 |
| Apixabanbrand: Eliquis | 21 | 13 |
| Losartan Potassium | 16 | 12 |
| Levofloxacin | 14 | 14 |
| Doxycycline Hyclate | 13 | 13 |
| Pantoprazole Sodium | 12 | — |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$47 across 2 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
- 2007-05-21
- Last updated
- 2017-01-04
Frequently asked questions
- What is Karen Ossa's NPI number?
- Karen Ossa's National Provider Identifier (NPI) is 1801005418, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karen Ossa's specialty?
- Karen Ossa is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Karen Ossa located?
- Karen Ossa's practice location on file with NPPES is 1357 Ave Ashford, San Juan, PR 00907-1400.
- What is Karen Ossa's phone number?
- The practice phone number listed in the NPPES registry for Karen Ossa is (787) 999-0204.
- Does Karen Ossa accept Medicare?
- Karen Ossa is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Karen Ossa's NPI active?
- Yes — Karen Ossa's NPI (1801005418) is active in the NPPES registry as of the last update on 2017-01-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.