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Dr. Johnny Nguyen, MD
NPI1508442047PAC ID6204377641
- Medicare services, 2024
- 154
- Medicare patients, 2024
- 163
- Part D claims, 2024
- 182
- Publications
- 2
- Hospital affiliations
- 5
- Practice address
- 6501 Coyle Ave, Carmichael, CA 95608
- Practice phone
- Call (916) 537-5000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
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. Johnny Nguyen is a hospitalist in Carmichael, California
Dr. Nguyen practices at Dignity Health - Mercy San Juan Medical Center in Carmichael, California, part of CommonSpirit Health.
Dr. Nguyen's NPI, 1508442047, was assigned on March 23, 2021. Dr. Nguyen graduated from University of Illinois College of Medicine - Chicago in 2021. Dr. Nguyen's California license number on file is A192186.
NPI and contact details
- NPI
- 1508442047NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6204377641
- NPI enumeration date
- March 23, 2021
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (916) 537-5000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 31
- Medical school graduation
- 2021
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Johnny Nguyen practices at Dignity Health - Mercy San Juan Medical Center in Carmichael, California
Dr. Nguyen's primary practice is Dignity Health - Mercy San Juan Medical Center, at 6501 Coyle Ave, Carmichael, CA 95608 in Sacramento County. The practice phone is (916) 537-5000.
- Dignity Health - Mercy San Juan Medical Center6501 Coyle Ave, Carmichael, CA 95608 · Sacramento CountyPhone(916) 537-5000
Source: Dmand AI Affiliation Data
Dr. Johnny Nguyen is affiliated with 6 sites of care and 1 medical group
Dr. Nguyen's primary practice is Dignity Health - Mercy San Juan Medical Center in Carmichael, California, part of CommonSpirit Health. Dr. Nguyen is also affiliated with Dignity Health - Mercy General Hospital. The medical group on file is Mercy Medical Group. Dmand AI also links Dr. Nguyen to 3 more hospitals and 1 group practice or clinic, each named with a free account.
Dignity Health - Mercy General HospitalMercy Medical Group3 hospitalsNames with a free account1 group practice or clinicName with a free account
See all 7 affiliations for Dr. NguyenSources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Johnny Nguyen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Nguyen practices, 6 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Dignity Health - Mercy San Juan Medical Center | Available with a free account |
| +5 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Johnny Nguyen is one of 3,186 hospitalists in California
Hospitalist is Dr. Nguyen's primary specialty in the NPI Registry, under taxonomy code 208M00000X. 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, Texas and Colorado.
Specialties and state licenses
- Hospitalist, CaliforniaPrimary
- Texas license
- Colorado license
Hospitalists near Dr. Nguyen
Counts of hospitalists with a Dmand AI profile, by place and practice. Each opens the list.
3,186hospitalists in California51hospitalists in Carmichael45hospitalists at Dignity Health - Mercy San Juan Medical Center
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Johnny Nguyen billed Medicare for 154 services in 2024
CMS data shows 154 Medicare services from Dr. Nguyen across 3 procedure codes in 2024, for 163 Medicare patients. Medicare paid $21,816 for them. Every service was in a facility, such as a hospital, rather than an office.
Medicare services, 2024154
Medicare patients163
Paid by Medicare$21,816
Procedure codes3
Dr. Nguyen compared with the California median for hospitalists, 2024
- Dr. Nguyen
- California median
- Medicare services
- 154vs 43064% below
- Medicare patients
- 163vs 20119% below
- Part D claims
- 82vs 6919% above
Medians across 2,991 hospitalists 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.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Nguyen and other hospitalists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Johnny Nguyen treated 163 Medicare patients in 2024, average age 75
CMS counts 163 Medicare patients who saw Dr. Nguyen in 2024. The largest group is 65 to 74, with 61 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 52% are also on Medicaid. Their average risk score is 2.26, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Nguyen's median patient age at 64, with 55% women.
Medicare patients, 2024163
Average age75
Average risk score2.26
Also on Medicaid52%
Dr. Nguyen's Medicare patients by age, 2024
Dr. Nguyen's Medicare patients by sex, 2024
- Women9558%
- Men6842%
Chronic conditions among Dr. Nguyen's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis55%
- Diabetes52%
- Chronic kidney disease51%
- Heart failure45%
- Ischemic heart disease45%
- Mood disorders45%
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 64
Patient panel by sex, all payers
- Women55%
- Men44%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Johnny Nguyen wrote 182 Medicare Part D claims in 2024
In 2024, Dr. Nguyen wrote 182 Medicare Part D claims for 35 patients. 86% of them were for generic drugs. CMS names the drug for 82 of them, across 7 drugs with 11 or more claims each, at $5,178 in total drug cost. In 2022, CMS named 27 claims across 2 drugs.
Part D claims, 2024182
Drugs named by CMS7
Total drug cost$5,178
Part D patients35
Dr. Nguyen's Part D claims by kind of drug, 2024
- Generic156 claims86%
- Brand-name26 claims14%
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.
Part D claims for drugs CMS names, 2022 to 2024
- 2022
- 2024
- Claims for drugs CMS names
- 2022: 272024: 82204%
Drugs named by CMS: 7 in 2024, 2 in 2022.
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
How Dr. Johnny Nguyen takes part in Medicare
Dr. Nguyen accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Johnny Nguyen has 2 publications on record
Dmand AI links 2 papers to Dr. Nguyen, published from 2018 to 2022. Dr. Nguyen's most frequent co-authors are Eugene Lee, Ulrike Luderer, MD and Glenn C. Yiu, MD, PhD.
Papers2
Years published2018 to 2022
Dr. Nguyen's most frequent co-authors
Recent publications by Dr. Nguyen
AgingAqueous HumorCirculating MicroRNA
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 hospitalists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Johnny Nguyen received $41 in industry payments in 2024
CMS Open Payments shows 2 general payments to Dr. Nguyen from 2 drug and device companies in 2024. Food and beverage make up the largest share, 100% of the total. UCB, Inc. paid the most, $25.
Companies that paid Dr. Nguyen the most, 2024 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Johnny Nguyen graduated from University of Illinois College of Medicine - Chicago
Dr. Nguyen graduated from University of Illinois College of Medicine - Chicago in 2021.
- Medical school
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. Johnny Nguyen accepts plans from 11 insurance carriers
Dr. Nguyen is in network with 11 carriers, including United Healthcare, Elevance and Aetna. PPO plans come from the most carriers, 7. Check the plan with the practice before a visit.
- United Healthcare
- Elevance
- Aetna
- Blue Cross Blue Shield of Michigan
- HCSC
- Alliant Health Plans
- Blue Cross and Blue Shield of Kansas City
- CMS Medicare
- +3 more carriersWith a free account
Plan types Dr. Nguyen accepts, by number of carriers
- PPO7
- HMO6
- EPO3
- Medicare2
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. Johnny 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 | Doctors and Clinicians National Downloadable File (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. Johnny 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. Johnny Nguyen's NPI number?
Dr. Johnny Nguyen's NPI number is 1508442047. It was assigned on March 23, 2021, and it is active in the NPI Registry.
What kind of doctor is Dr. Johnny Nguyen?
Dr. Johnny Nguyen is a hospitalist in Carmichael, California. The primary specialty in the NPI Registry is Hospitalist Physician (taxonomy code 208M00000X).
Where does Dr. Johnny Nguyen practice?
Dr. Nguyen practices at 6501 Coyle Ave, Carmichael, CA 95608. Dr. Nguyen's primary practice is Dignity Health - Mercy San Juan Medical Center in Carmichael, California, part of CommonSpirit Health. Dmand AI also links Dr. Nguyen to 3 hospitals and 1 group practice or clinic.
What is Dr. Johnny Nguyen's office phone number?
The practice phone on file for Dr. Nguyen is (916) 537-5000.
What is Dr. Johnny Nguyen's medical license number?
Dr. Nguyen's California license number on file is A192186, one of the licenses on file in 3 states.
Which states has Dr. Johnny Nguyen been licensed in?
Dmand AI has state licenses on file for Dr. Nguyen in California (2023 to 2025), Texas (2025 to 2027) and Colorado (2022 to 2025).
Which hospitals is Dr. Johnny Nguyen affiliated with?
Dr. Nguyen practices at Dignity Health - Mercy San Juan Medical Center in Carmichael, California. Dr. Nguyen is also affiliated with Dignity Health - Mercy General Hospital. Dmand AI links Dr. Nguyen to 3 more hospitals.
What medical group is Dr. Johnny Nguyen part of?
Dr. Nguyen is linked to Mercy Medical Group.
Does Dr. Johnny Nguyen accept Medicare?
Yes. CMS data shows Dr. Nguyen billed Medicare for 154 services in 2024, and Dr. Nguyen accepts Medicare assignment.
How many Medicare patients does Dr. Johnny Nguyen see?
CMS counts 163 Medicare patients who saw Dr. Nguyen in 2024, with an average age of 75.
Show 9 more questionsShow fewer questions
Is Dr. Johnny Nguyen board certified?
Yes. Dr. Nguyen is board certified in internal medicine by the American Board of Internal Medicine.
What services does Dr. Johnny Nguyen bill to Medicare?
In 2024, Dr. Nguyen's most billed Medicare services were hospital inpatient care (99223), critical care (99291) and hospital inpatient care (99233).
Where did Dr. Johnny Nguyen go to medical school?
Dr. Nguyen graduated from University of Illinois College of Medicine - Chicago in 2021.
What drugs does Dr. Johnny Nguyen prescribe most?
In 2024 Medicare Part D data, Dr. Nguyen's most prescribed drugs by claims were Levothyroxine Sodium, Losartan Potassium and Alendronate Sodium.
Has Dr. Johnny Nguyen received payments from drug or device companies?
CMS Open Payments shows $41 in general payments to Dr. Nguyen from 2 companies from 2024 to 2024. The largest total came from UCB, Inc.
How long has Dr. Johnny Nguyen been practicing?
Dr. Nguyen graduated from medical school in 2021, 5 years ago.
Does Dr. Johnny Nguyen do research?
Dmand AI links 2 publications to Dr. Nguyen, published from 2018 to 2022.
Who does Dr. Johnny Nguyen publish with?
Dr. Nguyen's most frequent co-authors are Eugene Lee (1 shared paper), Ulrike Luderer, MD (1 shared paper) and Glenn C. Yiu, MD, PhD (1 shared paper).
What insurance does Dr. Johnny Nguyen accept?
Dr. Nguyen is in network with 11 carriers, including United Healthcare, Elevance and Aetna. PPO plans come from the most carriers, 7. Check the plan with the practice before a visit.
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