Dr. Loc Tan Nguyen, MD
- Medicare services, 2024
- 840
- Medicare patients, 2024
- 206
- Part D claims, 2024
- 14,684
- Publications
- 5
- MIPS score, 2024
- 24
- Practice address
- 1800 N California St, Stockton, CA 95204
- Practice phone
- Call (209) 943-2000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Nguyen's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Loc Tan Nguyen is an internist in Stockton, California
Dr. Nguyen practices at Dignity Health - St. Joseph's Medical Center in Stockton, California, part of CommonSpirit Health.
Dr. Nguyen's NPI, 1962623462, was assigned on May 1, 2007. Dr. Nguyen graduated from Geisel School Of Medicine At Dartmouth in 2007. Dr. Nguyen holds California license A133981.
- NPI
- 1962623462NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4981863032
- NPI enumeration date
- May 1, 2007
- NPI status
- Active
- Practice phone
- (209) 943-2000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 45
- Medical school graduation
- 2007
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Loc Tan Nguyen practices at Dignity Health - St. Joseph's Medical Center in Stockton, California
Dr. Nguyen's primary practice is Dignity Health - St. Joseph's Medical Center, at 1800 N California St, Stockton, CA 95204 in San Joaquin County. The practice phone is (209) 943-2000.
- Dignity Health - St. Joseph's Medical Center1800 N California St, Stockton, CA 95204 · San Joaquin CountyPhone(209) 943-2000
Source: Dmand AI Affiliation Data
Dr. Loc Tan Nguyen is affiliated with 1 site of care
Dr. Nguyen's primary practice is Dignity Health - St. Joseph's Medical Center in Stockton, California, part of CommonSpirit Health.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Loc Tan Nguyen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Nguyen practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Dignity Health - St. Joseph's Medical Center | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
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Dr. Loc Tan Nguyen is one of 16,751 internists in California
Internal medicine is Dr. Nguyen's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Nguyen is board certified in internal medicine by the American Board of Internal Medicine. Dmand AI has Dr. Nguyen's licenses on file in 3 states: California, South Dakota and Connecticut.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
- South Dakota license
- Connecticut license
Clinical focus
Dmand AI lists acute gastroduodenitis, acute skin infection, adjustment disease, asthma, chronic anemia, chronic diabetes, chronic hypertension and chronic kidney disease among the conditions Dr. Nguyen treats.
Internists near Dr. Nguyen
Counts of internists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Loc Tan Nguyen billed Medicare for 840 services in 2024
CMS data shows 840 Medicare services from Dr. Nguyen across 7 procedure codes in 2024, for 206 Medicare patients. Medicare paid $77,142 for them. Every service was in an office.
Dr. Nguyen's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1,6352024: 84049%
Dr. Nguyen compared with the California median for internists, 2024
- Dr. Nguyen
- California median
- Medicare services
- 840vs 3612.3 times
- Medicare patients
- 206vs 15136% above
- Part D claims
- 14,179vs 42133.7 times
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Nguyen's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Nguyen?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Nguyen and other internists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Loc Tan Nguyen treated 206 Medicare patients in 2024, average age 75
CMS counts 206 Medicare patients who saw Dr. Nguyen in 2024. The largest group is 65 to 74, with 103 patients. 75% of them have diabetes, and 75% have high blood pressure. Their average risk score is 1.13, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Nguyen's median patient age at 73, with 56% women.
Dr. Nguyen's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Nguyen's Medicare patients by sex, 2024
- Women12058%
- Men8642%
Chronic conditions among Dr. Nguyen's Medicare patients, 2024
- Diabetes75%
- High blood pressure75%
- High cholesterol75%
- Chronic kidney disease25%
- Ischemic heart disease19%
- Osteoporosis17%
- Arthritis14%
- Heart failure12%
Share of Medicare patients with each condition. A patient can have several.
Dr. Nguyen's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 73
Patient panel by sex, all payers
- Women56%
- Men44%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Loc Tan Nguyen wrote 14,684 Medicare Part D claims in 2024
In 2024, Dr. Nguyen wrote 14,684 Medicare Part D claims for 463 patients. 71% of them were for generic drugs. CMS names the drug for 14,179 of them, across 129 drugs with 11 or more claims each, at $1,883,988 in total drug cost. In 2023, CMS named 14,428 claims across 137 drugs.
Dr. Nguyen's Part D claims by kind of drug, 2024
- Generic10,463 claims71%
- Brand-name3,926 claims27%
- Other295 claims2%
Dr. Nguyen's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Nguyen's Part D claims, 2024
- Opioids1%147 of 14,684 claims
- Antibiotics2%337 of 14,684 claims
- Antipsychotics, patients 65 and over0%29 of 14,684 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 14,4282024: 14,1792%
Drugs named by CMS: 129 in 2024, 137 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Loc Tan Nguyen scored 24 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 24 out of 100 for Dr. Nguyen for performance year 2024, reported individually.
Dr. Nguyen's MIPS scores, performance year 2024
- 24of 100Final score
- 0of 100Quality
- 0of 100Improvement Activities
- 79of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Source: Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Loc Tan Nguyen has 5 publications on record
Dmand AI links 5 papers to Dr. Nguyen, published from 2022 to 2025. 2024 was the busiest year, with 2.
Dr. Nguyen's papers by year, 2022 to 2025
Recent publications by Dr. Nguyen
See who Dr. Nguyen researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Nguyen works with, so you can find a warm path to the right internists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Loc Tan Nguyen received $95 in industry payments from 2016 to 2024
CMS Open Payments shows 6 general payments to Dr. Nguyen from 5 drug and device companies from 2016 to 2024. Food and beverage make up the largest share, 84% of the total. Amgen Inc. paid the most, $36.
General payments to Dr. Nguyen by program year, 2016 to 2024
General payments to Dr. Nguyen by kind, 2016 to 2024
- Food and beverage$8084%
- Education$1516%
Companies that paid Dr. Nguyen the most, 2016 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Loc Tan Nguyen graduated from Geisel School Of Medicine At Dartmouth
Dr. Nguyen graduated from Geisel School Of Medicine At Dartmouth in 2007.
- Medical school
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. Loc Tan Nguyen accepts plans from 6 insurance carriers
Dr. Nguyen is in network with 6 carriers, including Blue Cross Blue Shield of Michigan, Blue Cross Blue Shield of Massachusetts and HCSC. Medicare plans come from the most carriers, 5. Check the plan with the practice before a visit.
- Blue Cross Blue Shield of Michigan
- Blue Cross Blue Shield of Massachusetts
- HCSC
- Regence Health Plans
- CMS Medicare
- Humana
Plan types Dr. Nguyen accepts, by number of carriers
- Medicare5
- PPO4
- HMO2
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. Loc Tan Nguyen's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Loc Tan Nguyen
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Loc Tan Nguyen's NPI number?
Dr. Loc Tan Nguyen's NPI number is 1962623462. It was assigned on May 1, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Loc Tan Nguyen?
Dr. Loc Tan Nguyen is an internist in Stockton, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Loc Tan Nguyen practice?
Dr. Nguyen practices at 1800 N California St, Stockton, CA 95204. Dr. Nguyen's primary practice is Dignity Health - St. Joseph's Medical Center in Stockton, California, part of CommonSpirit Health.
What is Dr. Loc Tan Nguyen's office phone number?
The practice phone on file for Dr. Nguyen is (209) 943-2000.
What is Dr. Loc Tan Nguyen's medical license number?
Dr. Nguyen holds California license A133981, one of the licenses on file in 3 states.
Which states has Dr. Loc Tan Nguyen been licensed in?
Dmand AI has state licenses on file for Dr. Nguyen in California (2014 to 2026), South Dakota and Connecticut (2010 to 2012).
Which hospitals is Dr. Loc Tan Nguyen affiliated with?
Dr. Nguyen practices at Dignity Health - St. Joseph's Medical Center in Stockton, California.
Does Dr. Loc Tan Nguyen accept Medicare?
Yes. CMS data shows Dr. Nguyen billed Medicare for 840 services in 2024.
What is Dr. Loc Tan Nguyen's MIPS score?
Dr. Nguyen's MIPS final score for performance year 2024 is 24 out of 100, reported individually.
How many Medicare patients does Dr. Loc Tan Nguyen see?
CMS counts 206 Medicare patients who saw Dr. Nguyen in 2024, with an average age of 75.
Show 8 more questionsShow fewer questions
Is Dr. Loc Tan Nguyen board certified?
Yes. Dr. Nguyen is board certified in internal medicine by the American Board of Internal Medicine.
What services does Dr. Loc Tan Nguyen bill to Medicare?
In 2024, Dr. Nguyen's most billed Medicare services were office visit, established patient (99215), office visit, established patient (99214) and care management and other visits (99442).
Where did Dr. Loc Tan Nguyen go to medical school?
Dr. Nguyen graduated from Geisel School Of Medicine At Dartmouth in 2007.
What drugs does Dr. Loc Tan Nguyen prescribe most?
In 2024 Medicare Part D data, Dr. Nguyen's most prescribed drugs by claims were Atorvastatin Calcium, Jardiance and Fluticasone Propionate.
Has Dr. Loc Tan Nguyen received payments from drug or device companies?
CMS Open Payments shows $95 in general payments to Dr. Nguyen from 5 companies from 2016 to 2024. The largest total came from Amgen Inc.
How long has Dr. Loc Tan Nguyen been practicing?
Dr. Nguyen graduated from medical school in 2007, 19 years ago.
Does Dr. Loc Tan Nguyen do research?
Dmand AI links 5 publications to Dr. Nguyen, published from 2022 to 2025.
What insurance does Dr. Loc Tan Nguyen accept?
Dr. Nguyen is in network with 6 carriers, including Blue Cross Blue Shield of Michigan, Blue Cross Blue Shield of Massachusetts and HCSC. Medicare plans come from the most carriers, 5. Check the plan with the practice before a visit.
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