Dr. Ruhong Ma, DO
- Medicare services, 2024
- 211
- Medicare patients, 2024
- 214
- Hospital affiliations
- 4
- Industry payments
- $87
- Medical groups
- 7
- Practice address
- 436 S Magnolia Ave, El Cajon, CA 92020
- Practice phone
- Call (619) 662-4100
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
San Ysidro Health El Cajon/San Diego Pace
El Cajon, California
Find Dr. Ma'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. Ruhong Ma is an internist in El Cajon, California
Dr. Ma practices at San Ysidro Health El Cajon/San Diego Pace in El Cajon, California.
Dr. Ma's NPI, 1063679587, was assigned on May 21, 2008. Dr. Ma graduated from Edward Via Col of Osteo Medicine-Virginia Campus in 2008. Dr. Ma holds California license 20A13891.
- NPI
- 1063679587NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9638317928
- NPI enumeration date
- May 21, 2008
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (619) 662-4100
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 44
- Medical school graduation
- 2008
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Ruhong Ma practices at San Ysidro Health El Cajon/San Diego Pace in El Cajon, California
Dr. Ma's primary practice is San Ysidro Health El Cajon/San Diego Pace, at 436 S Magnolia Ave, El Cajon, CA 92020 in San Diego County. The practice phone is (619) 662-4100.
- San Ysidro Health El Cajon/San Diego Pace436 S Magnolia Ave, El Cajon, CA 92020 · San Diego CountyPhone(619) 662-4100
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Ruhong Ma is affiliated with 5 sites of care and 7 medical groups
Dr. Ma's primary practice is San Ysidro Health El Cajon/San Diego Pace in El Cajon, California. Dr. Ma is also affiliated with Kaiser Permanente Zion Medical Center. The medical group on file is Sharp Rees-Stealy Medical Group. Dmand AI also links Dr. Ma to 3 more hospitals and 6 medical groups, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Ruhong Ma's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Ma practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| San Ysidro Health El Cajon/San Diego Pace | Available with a free account |
| +4 more sites and 6 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Ruhong Ma is one of 16,751 internists in California
Internal medicine is Dr. Ma's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dmand AI has Dr. Ma's licenses on file in 2 states: California and Washington.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
- Washington license
Internists near Dr. Ma
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. Ruhong Ma billed Medicare for 211 services in 2024
CMS data shows 211 Medicare services from Dr. Ma across 1 procedure code in 2024, for 214 Medicare patients. Medicare paid $20,286 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Ma's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 2972024: 21129%
Dr. Ma compared with the California median for internists, 2024
- Dr. Ma
- California median
- Medicare services
- 211vs 36142% below
- Medicare patients
- 214vs 15142% above
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Ma'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. Ma and other internists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Ruhong Ma treated 214 Medicare patients in 2024, average age 77
CMS counts 214 Medicare patients who saw Dr. Ma in 2024. The largest group is 75 to 84, with 74 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 26% are also on Medicaid. Their average risk score is 2.08, 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. Ma's median patient age at 60, with 57% women.
Dr. Ma's Medicare patients by age, 2024
Dr. Ma's Medicare patients by sex, 2024
- Women11855%
- Men9645%
Chronic conditions among Dr. Ma's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis51%
- Chronic kidney disease45%
- Diabetes44%
- Ischemic heart disease44%
- Atrial fibrillation41%
- Heart failure40%
Share of Medicare patients with each condition. A patient can have several.
Dr. Ma's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 60
Patient panel by sex, all payers
- Women57%
- Men42%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
How Dr. Ruhong Ma takes part in Medicare
Dr. Ma 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. Ruhong Ma received $87 in industry payments from 2016 to 2018
CMS Open Payments shows 3 general payments to Dr. Ma from 1 drug or device company from 2016 to 2018. Food and beverage make up the largest share, 100% of the total. Abiomed paid the most, $87.
General payments to Dr. Ma by program year, 2016 to 2018
Companies that paid Dr. Ma the most, 2016 to 2018
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Ruhong Ma graduated from Edward Via Col of Osteo Medicine-Virginia Campus
Dr. Ma graduated from Edward Via Col of Osteo Medicine-Virginia Campus in 2008.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Ruhong Ma'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand 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. Ruhong Ma
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. Ruhong Ma's NPI number?
Dr. Ruhong Ma's NPI number is 1063679587. It was assigned on May 21, 2008, and it is active in the NPI Registry.
What kind of doctor is Dr. Ruhong Ma?
Dr. Ruhong Ma is an internist in El Cajon, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Ruhong Ma practice?
Dr. Ma practices at 436 S Magnolia Ave, El Cajon, CA 92020. Dr. Ma's primary practice is San Ysidro Health El Cajon/San Diego Pace in El Cajon, California. Dmand AI also links Dr. Ma to 3 hospitals and 6 medical groups.
What is Dr. Ruhong Ma's office phone number?
The practice phone on file for Dr. Ma is (619) 662-4100.
What is Dr. Ruhong Ma's medical license number?
Dr. Ma holds California license 20A13891, one of the licenses on file in 2 states.
Which states has Dr. Ruhong Ma been licensed in?
Dmand AI has state licenses on file for Dr. Ma in California and Washington.
Which hospitals is Dr. Ruhong Ma affiliated with?
Dr. Ma is affiliated with Kaiser Permanente Zion Medical Center. Dmand AI links Dr. Ma to 3 more hospitals.
What medical group is Dr. Ruhong Ma part of?
Dr. Ma is linked to Sharp Rees-Stealy Medical Group. Dmand AI links Dr. Ma to 6 more medical groups.
Does Dr. Ruhong Ma accept Medicare?
Yes. CMS data shows Dr. Ma billed Medicare for 211 services in 2024, and Dr. Ma accepts Medicare assignment.
How many Medicare patients does Dr. Ruhong Ma see?
CMS counts 214 Medicare patients who saw Dr. Ma in 2024, with an average age of 77.
Show 4 more questionsShow fewer questions
What services does Dr. Ruhong Ma bill to Medicare?
In 2024, Dr. Ma's most billed Medicare services were hospital inpatient care (99222).
Where did Dr. Ruhong Ma go to medical school?
Dr. Ma graduated from Edward Via Col of Osteo Medicine-Virginia Campus in 2008.
Has Dr. Ruhong Ma received payments from drug or device companies?
CMS Open Payments shows $87 in general payments to Dr. Ma from 1 company from 2016 to 2018. The largest total came from Abiomed.
How long has Dr. Ruhong Ma been practicing?
Dr. Ma graduated from medical school in 2008, 18 years ago.
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