Dr. Eric Chapa, MD
- Medicare services, 2023
- 14
- Medicare patients, 2024
- 24
- Part D claims, 2018
- 50
- Hospital affiliations
- 1
- Industry payments
- $961
- 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. Chapa'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. Eric Chapa is a family medicine physician in Stockton, California
Dr. Chapa practices at Dignity Health - St. Joseph's Medical Center in Stockton, California, part of CommonSpirit Health.
Dr. Chapa's NPI, 1851395131, was assigned on June 2, 2005. Dr. Chapa graduated from UC Irvine School of Medicine in 1975. Dr. Chapa holds California license G33747.
- NPI
- 1851395131NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1153233788
- NPI enumeration date
- June 2, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (209) 943-2000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 77
- Medical school graduation
- 1975
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Eric Chapa practices at Dignity Health - St. Joseph's Medical Center in Stockton, California
Dr. Chapa'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. Eric Chapa is affiliated with 1 site of care and 1 medical group
Dr. Chapa's primary practice is Dignity Health - St. Joseph's Medical Center in Stockton, California, part of CommonSpirit Health. The medical group on file is San Joaquin County Behavioral Health Services.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Eric Chapa's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chapa 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
Dmand AI maps EHR vendors, IT decision makers and buying committees across CommonSpirit Health and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Eric Chapa is one of 15,680 family medicine physicians in California
Family medicine is Dr. Chapa's primary specialty in the NPI Registry, under taxonomy code 207Q00000X. Dr. Chapa is licensed in California.
Specialties and state licenses
- Family medicine, CaliforniaPrimary
Clinical focus
Dmand AI lists acute skin infection, chronic diabetes, chronic hypertension, ear infection, enlarged prostate, hemorrhoids, lower back pain and schizophrenia among the conditions Dr. Chapa treats.
Family medicine physicians near Dr. Chapa
Counts of family medicine physicians 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. Eric Chapa billed Medicare for 14 services in 2023
CMS data shows 14 Medicare services from Dr. Chapa across 1 procedure code in 2023, for 24 Medicare patients. Medicare paid $2,278 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Chapa's Medicare services by type, 2018 to 2023
- 2018
- 2023
- Surgery
- 2018: 162023: 1413%
Dr. Chapa compared with the California median for family medicine physicians, 2023
- Dr. Chapa
- California median
- Medicare services
- 14vs 24694% below
- Medicare patients
- 24vs 11880% below
- Part D claims
- 50vs 83394% below
Medians across 15,349 family medicine physicians in California with Dmand AI profiles that report each measure.
Dr. Chapa's most billed Medicare procedure codes, 2023
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. Chapa and other family medicine physicians in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Eric Chapa treated 24 Medicare patients in 2024, average age 74
CMS counts 24 Medicare patients who saw Dr. Chapa in 2024. 75% of them have arthritis, and 75% have high blood pressure. Their average risk score is 0.58, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Chapa's median patient age at 69, with 46% women.
Chronic conditions among Dr. Chapa's Medicare patients, 2024
- Arthritis75%
- High blood pressure75%
- High cholesterol75%
Share of Medicare patients with each condition. A patient can have several.
Dr. Chapa's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 69
Patient panel by sex, all payers
- Women46%
- Men54%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Eric Chapa wrote 50 Medicare Part D claims in 2018
In 2018, Dr. Chapa wrote 50 Medicare Part D claims. Every claim was for a generic drug. They cover 4 drugs, with $1,143 in total drug cost. In 2017, CMS named 513 claims across 20 drugs.
Dr. Chapa's most prescribed drugs by claims, 2018
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, 2017 to 2018
- 2017
- 2018
- Claims for drugs CMS names
- 2017: 5132018: 5090%
Drugs named by CMS: 4 in 2018, 20 in 2017.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
Dr. Eric Chapa ranks in the 73rd percentile for knee replacement in Medicare
Dr. Chapa accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 41 procedures of knee replacement by Dr. Chapa, more than 73% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Chapa ranks in Medicare procedure volume
- Knee replacement
- 73rd percentile41 procedures
- Hip replacement
- 55th percentile13 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Eric Chapa received $961 in industry payments in 2016
CMS Open Payments shows 18 general payments to Dr. Chapa from 11 drug and device companies in 2016. Food and beverage make up the largest share, 99% of the total. Novo Nordisk Inc paid the most, $201.
General payments to Dr. Chapa by kind, 2016 to 2016
- Food and beverage$95199%
- Education$101%
Companies that paid Dr. Chapa the most, 2016 to 2016
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Eric Chapa graduated from UC Irvine School of Medicine
Dr. Chapa graduated from UC Irvine School of Medicine in 1975.
- Medical school
Source: Dmand AI Professional Profile Data
Dr. Eric Chapa accepts plans from 7 insurance carriers
Dr. Chapa is in network with 7 carriers, including Elevance, Blue Cross Blue Shield of Michigan and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 6. Check the plan with the practice before a visit.
- Elevance
- Blue Cross Blue Shield of Michigan
- Blue Cross Blue Shield of Massachusetts
- HCSC
- Regence Health Plans
- CMS Medicare
- Humana
Plan types Dr. Chapa accepts, by number of carriers
- Medicare6
- PPO5
- HMO3
- EPO1
- Medicaid1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. Eric Chapa'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) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (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 |
| 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. Eric Chapa
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. Eric Chapa's NPI number?
Dr. Eric Chapa's NPI number is 1851395131. It was assigned on June 2, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Eric Chapa?
Dr. Eric Chapa is a family medicine physician in Stockton, California. The primary specialty in the NPI Registry is Family Medicine Physician (taxonomy code 207Q00000X).
Where does Dr. Eric Chapa practice?
Dr. Chapa practices at 1800 N California St, Stockton, CA 95204. Dr. Chapa's primary practice is Dignity Health - St. Joseph's Medical Center in Stockton, California, part of CommonSpirit Health.
What is Dr. Eric Chapa's office phone number?
The practice phone on file for Dr. Chapa is (209) 943-2000.
What is Dr. Eric Chapa's medical license number?
Dr. Chapa holds California license G33747.
Which hospitals is Dr. Eric Chapa affiliated with?
Dr. Chapa practices at Dignity Health - St. Joseph's Medical Center in Stockton, California.
What medical group is Dr. Eric Chapa part of?
Dr. Chapa is linked to San Joaquin County Behavioral Health Services.
Does Dr. Eric Chapa accept Medicare?
Yes. CMS data shows Dr. Chapa billed Medicare for 14 services in 2023, and Dr. Chapa accepts Medicare assignment.
How many Medicare patients does Dr. Eric Chapa see?
CMS counts 24 Medicare patients who saw Dr. Chapa in 2024, with an average age of 74.
What services does Dr. Eric Chapa bill to Medicare?
In 2023, Dr. Chapa's most billed Medicare services were surgery: bones and joints (27447).
Show 5 more questionsShow fewer questions
Where did Dr. Eric Chapa go to medical school?
Dr. Chapa graduated from UC Irvine School of Medicine in 1975.
What drugs does Dr. Eric Chapa prescribe most?
In 2018 Medicare Part D data, Dr. Chapa's most prescribed drugs by claims were Losartan Potassium, Amlodipine Besylate and Labetalol HCl.
Has Dr. Eric Chapa received payments from drug or device companies?
CMS Open Payments shows $961 in general payments to Dr. Chapa from 11 companies from 2016 to 2016. The largest total came from Novo Nordisk Inc.
How long has Dr. Eric Chapa been practicing?
Dr. Chapa graduated from medical school in 1975, 51 years ago.
What insurance does Dr. Eric Chapa accept?
Dr. Chapa is in network with 7 carriers, including Elevance, Blue Cross Blue Shield of Michigan and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 6. Check the plan with the practice before a visit.
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