Dr. Johnny C. Chen, MD
- Medicare services, 2024
- 46
- Medicare patients, 2024
- 130
- Hospital affiliations
- 2
- Industry payments
- $178
- Medical group
- 1
- Practice address
- 1400 E Church St, Santa Maria, CA 93454
- Practice phone
- Call (805) 739-3100
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find Dr. Chen'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 C. Chen is an anesthesiologist in Santa Maria, California
Dr. Chen practices at Dignity Health - Marian Regional Medical Center in Santa Maria, California, part of CommonSpirit Health.
Dr. Chen's NPI, 1225286479, was assigned on August 29, 2008. Dr. Chen graduated from University of California, Geffen School of Medicine in 2006. Dr. Chen holds California license A106527.
- NPI
- 1225286479NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0143491076
- NPI enumeration date
- August 29, 2008
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (805) 739-3100
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 46
- Medical school graduation
- 2006
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Johnny C. Chen practices at Dignity Health - Marian Regional Medical Center in Santa Maria, California
Dr. Chen's primary practice is Dignity Health - Marian Regional Medical Center, at 1400 E Church St, Santa Maria, CA 93454 in Santa Barbara County. The practice phone is (805) 739-3100.
- Dignity Health - Marian Regional Medical Center1400 E Church St, Santa Maria, CA 93454 · Santa Barbara CountyPhone(805) 739-3100
Source: Dmand AI Affiliation Data
Dr. Johnny C. Chen is affiliated with 2 sites of care and 1 medical group
Dr. Chen's primary practice is Dignity Health - Marian Regional Medical Center in Santa Maria, California, part of CommonSpirit Health. The medical group on file is Anesthesia Medical Group of Santa Maria. Dmand AI also links Dr. Chen to 1 more hospital, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Johnny C. Chen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chen practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Dignity Health - Marian Regional Medical Center | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Johnny C. Chen is one of 6,593 anesthesiologists in California
Anesthesiology is Dr. Chen's primary specialty in the NPI Registry, under taxonomy code 207L00000X. Dr. Chen is licensed in California.
Specialties and state licenses
- Anesthesiology, CaliforniaPrimary
Anesthesiologists near Dr. Chen
Counts of anesthesiologists 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. Johnny C. Chen billed Medicare for 46 services in 2024
CMS data shows 46 Medicare services from Dr. Chen across 3 procedure codes in 2024, for 130 Medicare patients. Medicare paid $4,239 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Chen's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Imaging
- 2023: 02024: 18
- Surgery
- 2023: 02024: 17
- Anesthesia
- 2023: 952024: 1188%
Dr. Chen compared with the California median for anesthesiologists, 2024
- Dr. Chen
- California median
- Medicare services
- 46vs 7236% below
- Medicare patients
- 130vs 1439% below
Medians across 5,562 anesthesiologists in California with Dmand AI profiles that report each measure.
Dr. Chen'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. Chen?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Chen and other anesthesiologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Johnny C. Chen treated 130 Medicare patients in 2024, average age 74
CMS counts 130 Medicare patients who saw Dr. Chen in 2024. The largest group is 65 to 74, with 66 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 38% are also on Medicaid. Their average risk score is 1.66, 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. Chen's median patient age at 34, with 78% women.
Dr. Chen's Medicare patients by age, 2024
Dr. Chen's Medicare patients by sex, 2024
- Women6147%
- Men6953%
Chronic conditions among Dr. Chen's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis47%
- Atrial fibrillation35%
- Chronic kidney disease35%
- Diabetes33%
- Ischemic heart disease28%
- Anxiety27%
Share of Medicare patients with each condition. A patient can have several.
Dr. Chen's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 34
Patient panel by sex, all payers
- Women78%
- Men22%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
How Dr. Johnny C. Chen takes part in Medicare
Dr. Chen 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 C. Chen received $178 in industry payments from 2018 to 2023
CMS Open Payments shows 7 general payments to Dr. Chen from 7 drug and device companies from 2018 to 2023. Food and beverage make up the largest share, 100% of the total. Pacira Pharmaceuticals Incorporated paid the most, $53.
General payments to Dr. Chen by program year, 2018 to 2023
Companies that paid Dr. Chen the most, 2018 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Johnny C. Chen graduated from University of California, Geffen School of Medicine
Dr. Chen graduated from University of California, Geffen School of Medicine in 2006.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Johnny C. Chen'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) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile 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 C. Chen
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 C. Chen's NPI number?
Dr. Johnny C. Chen's NPI number is 1225286479. It was assigned on August 29, 2008, and it is active in the NPI Registry.
What kind of doctor is Dr. Johnny C. Chen?
Dr. Johnny C. Chen is an anesthesiologist in Santa Maria, California. The primary specialty in the NPI Registry is Anesthesiology Physician (taxonomy code 207L00000X).
Where does Dr. Johnny C. Chen practice?
Dr. Chen practices at 1400 E Church St, Santa Maria, CA 93454. Dr. Chen's primary practice is Dignity Health - Marian Regional Medical Center in Santa Maria, California, part of CommonSpirit Health. Dmand AI also links Dr. Chen to 1 hospital.
What is Dr. Johnny C. Chen's office phone number?
The practice phone on file for Dr. Chen is (805) 739-3100.
What is Dr. Johnny C. Chen's medical license number?
Dr. Chen holds California license A106527.
Which hospitals is Dr. Johnny C. Chen affiliated with?
Dr. Chen practices at Dignity Health - Marian Regional Medical Center in Santa Maria, California. Dmand AI links Dr. Chen to 1 more hospital.
What medical group is Dr. Johnny C. Chen part of?
Dr. Chen is linked to Anesthesia Medical Group of Santa Maria.
Does Dr. Johnny C. Chen accept Medicare?
Yes. CMS data shows Dr. Chen billed Medicare for 46 services in 2024, and Dr. Chen accepts Medicare assignment.
How many Medicare patients does Dr. Johnny C. Chen see?
CMS counts 130 Medicare patients who saw Dr. Chen in 2024, with an average age of 74.
What services does Dr. Johnny C. Chen bill to Medicare?
In 2024, Dr. Chen's most billed Medicare services were ultrasound (76942), surgery: brain, spine and nerves (64447) and anesthesia (00790).
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Where did Dr. Johnny C. Chen go to medical school?
Dr. Chen graduated from University of California, Geffen School of Medicine in 2006.
Has Dr. Johnny C. Chen received payments from drug or device companies?
CMS Open Payments shows $178 in general payments to Dr. Chen from 7 companies from 2018 to 2023. The largest total came from Pacira Pharmaceuticals Incorporated.
How long has Dr. Johnny C. Chen been practicing?
Dr. Chen graduated from medical school in 2006, 20 years ago.
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