Grissel Rios, M.D.
NPI 1821072935 · Rheumatology Physician · San Juan, PR
Enrolled with Medicare as Practitioner - Rheumatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Grissel Rios, M.D. is a Rheumatology Physician provider in San Juan, PR (NPI 1821072935).
Provider details
- NPI number
- 1821072935
- Entity type
- Individual
- Primary specialty
- Rheumatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- Yes
- License
- 13344 (PR)
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
20 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
142 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 142 | $89 |
Typical Medicare-allowed amounts for these services range $89–$89 (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 · 107 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Prednisone | 877 | 138 |
| Gabapentin | 860 | 176 |
| Methotrexate Sodiumbrand: Methotrexate | 536 | 78 |
| Hydroxychloroquine Sulfate | 396 | 81 |
| Celecoxib | 236 | 55 |
| Duloxetine Hcl | 220 | 52 |
| Famotidine | 180 | 40 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$6,941 across 24 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
- 2005-12-01
- Last updated
- 2010-02-10
Frequently asked questions
- What is Grissel Rios's NPI number?
- Grissel Rios's National Provider Identifier (NPI) is 1821072935, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Grissel Rios's specialty?
- Grissel Rios is listed in the NPPES registry with a primary specialty of Rheumatology Physician (Allopathic & Osteopathic Physicians).
- Where is Grissel Rios located?
- Grissel Rios's practice location on file with NPPES is Ave Roosevelt 400 Clinicas Las Americas, San Juan, PR 00918.
- What is Grissel Rios's phone number?
- The practice phone number listed in the NPPES registry for Grissel Rios is (787) 765-3245.
- Does Grissel Rios accept Medicare?
- Grissel Rios is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Grissel Rios's NPI active?
- Yes — Grissel Rios's NPI (1821072935) is active in the NPPES registry as of the last update on 2010-02-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.