Dianne Quintana, M.D.
NPI 1386083780 · Internal Medicine Physician · Ontario, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Dianne Quintana, M.D. is a Internal Medicine Physician provider in Ontario, CA (NPI 1386083780).
Provider details
- NPI number
- 1386083780
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- A132214 (CA)
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
13 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
159 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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 66 | $139 |
| Annual Depression Screening, 5 to 15 MinutesG0444 | 31 | $21 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 28 | $194 |
| Annual Alcohol Misuse Screening, 5 to 15 MinutesG0442 | 20 | $21 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 14 | $141 |
Typical Medicare-allowed amounts for these services range $21–$194 (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 · 28 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 101 | 47 |
| Losartan Potassium | 74 | 30 |
| Levothyroxine Sodium | 52 | 18 |
| Metformin Hcl | 44 | 20 |
| Amlodipine Besylate | 37 | 19 |
| Lisinopril | 37 | 14 |
| Gabapentin |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$42 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
- 2013-06-18
- Last updated
- 2019-10-08
Frequently asked questions
- What is Dianne Quintana's NPI number?
- Dianne Quintana's National Provider Identifier (NPI) is 1386083780, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Dianne Quintana's specialty?
- Dianne Quintana is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Dianne Quintana located?
- Dianne Quintana's practice location on file with NPPES is 2680 E Riverside Dr, Ontario, CA 91761.
- What is Dianne Quintana's phone number?
- The practice phone number listed in the NPPES registry for Dianne Quintana is (909) 469-9013.
- Does Dianne Quintana accept Medicare?
- Dianne Quintana is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Dianne Quintana's NPI active?
- Yes — Dianne Quintana's NPI (1386083780) is active in the NPPES registry as of the last update on 2019-10-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.