Richard Nguyen, M.D.
NPI 1699960708 · Internal Medicine Physician · Oxnard, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Richard Nguyen, M.D. is a Internal Medicine Physician provider in Oxnard, CA (NPI 1699960708).
Provider details
- NPI number
- 1699960708
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A56329 (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 tenure28% of score
18 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
7,989 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| Care Management Services for Behavioral Health Conditions, 20 Minutes Or More Clinical Staff Time Directed By Health Care Professional99484 | 2,234 | $61 |
| Chronic Care Management Services for Two Or More Chronic Conditions, First 30 Minutes Provided Personally By Health Care Professional, Per Calendar Month99491 | 1,842 | $93 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 893 | $144 |
| Injection of Drug Or Substance Under Skin Or Into Muscle96372 | 687 | $16 |
| Blood Glucose (sugar) Level After Receiving Dose of Glucose82950 | 251 | $5 |
| Advance Care Planning, First 30 Minutes99497 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 121 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 329 | 84 |
| Omeprazole | 223 | 50 |
| Levothyroxine Sodium | 182 | 39 |
| Metformin Hcl | 180 | 47 |
| Gabapentin | 176 | 32 |
| Lorazepam | 159 | 32 |
| Hydrocodone/Acetaminophen |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-09-11
- Last updated
- 2007-09-12
Frequently asked questions
- What is Richard Nguyen's NPI number?
- Richard Nguyen's National Provider Identifier (NPI) is 1699960708, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Richard Nguyen's specialty?
- Richard Nguyen is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Richard Nguyen located?
- Richard Nguyen's practice location on file with NPPES is 719 N a St, Oxnard, CA 93030-4309.
- What is Richard Nguyen's phone number?
- The practice phone number listed in the NPPES registry for Richard Nguyen is (805) 485-9123.
- Does Richard Nguyen accept Medicare?
- Richard Nguyen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Richard Nguyen's NPI active?
- Yes — Richard Nguyen's NPI (1699960708) is active in the NPPES registry as of the last update on 2007-09-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.