1. Home
  2. Directory
  3. California
  4. Oceano
  5. Internal Medicine
  6. NPI Profile

DR. DUC VAN NGUYEN M.D.
NPI 1255366928
Internal Medicine in Oceano, CA

Active since July 11, 2006PECOS EnrolledAccepts Medicare Assignment
2120 CIENAGA ST, OCEANO, CA 93445(805) 994-2100(805) 994-2197 Get Directions Write a Review

NPPES record last updated: February 20, 2025. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Feb 20, 2025, Apr 11, 2017, Mar 30, 2016 and 1 more (4 updates tracked since 2016).

About Dr. Duc Van Nguyen M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. DUC VAN NGUYEN M.D. (NPI 1255366928) is an individual internal medicine provider in Oceano, California, licensed in California (A83670) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS and is a graduate of Other (1999).

NPPES Registry Identity

NPI1255366928
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. DUC VAN NGUYENCredential: M.D.
Location Address2120 CIENAGA STOceano, CA 93445-9016
Mailing Address2050 S Blosser RdSanta Maria, CA 93458-7310 · (805) 361-8030
Phone(805) 994-2100
Fax(805) 994-2197
Sole ProprietorNo
Medical School CMSOtherGraduated 1999
Enumeration DateJuly 11, 2006
Last NPPES UpdateFebruary 20, 20254 updates tracked since enumeration
NPPES CertifiedFebruary 20, 2025
✔ NPI 1255366928 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in CA · A83670
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
2120 CIENAGA ST, Oceano, CA 93445
Open in Google Maps ↗

Other Identifiers 1

Medicaid00A836700CA

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Duc Van Nguyen M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID1355254764
PECOS Enrollment IDI20031111000732, I20250226001898
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 93445 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$135.73 typical visit price
range $59.84 – $178.89
Typical copayment $33.93 (range $14.96 – $44.72)
Most-billed visit code 99204
Established Patient
$104.82 typical visit price
range $19.70 – $146.55
Typical copayment $26.20 (range $4.92 – $36.63)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 6

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. ETHAN ROY ETNYRE MD
Family Medicine
2120 CIENAGA ST
OCEANO, CA 93445
San Luis Obispo County (805) 994-2100
NUBIA DAGUIA F.N.P.
Nurse Practitioner (Family)
2120 CIENAGA ST
OCEANO, CA 93445
San Luis Obispo County (805) 994-2100
DR. KAREN S MIKUNI MD
Family Medicine
2120 CIENAGA ST
OCEANO, CA 93445
San Luis Obispo County (805) 994-2100
DANIEL ENRIQUE PARKER SCHMIDT
Dentist (General Practice)
2120 CIENAGA ST
OCEANO, CA 93445
San Luis Obispo County (805) 994-2100
FREDDY VELAZQUEZ RDH
Dental Hygienist
2120 CIENAGA ST
OCEANO, CA 93445
San Luis Obispo County (805) 994-2103
MARIBEL RAMIREZ RDH
Dental Hygienist
2120 CIENAGA ST
OCEANO, CA 93445
San Luis Obispo County (805) 994-2103

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Duc Nguyen's NPI number?

The NPI number for Duc Nguyen is 1255366928. It was assigned to this individual provider in the NPPES registry on July 11, 2006.

Where is Duc Nguyen located?

Duc Nguyen practices at 2120 Cienaga St, Oceano, CA 93445. The listed phone number is (805) 994-2100.

What is Duc Nguyen's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Duc Nguyen enrolled in Medicare?

Yes. Duc Nguyen is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

When was this NPI record last updated?

The NPPES record for Duc Nguyen was last updated on February 20, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.